Release: v3.14.1

Currently translated at 100.0% (516 of 516 strings)

Translation: OpenTracks/opentracks.src-main-res-values-strings-xml--main
Translate-URL: https://weblate.bubu1.eu/projects/OpenTracks/opentracks/cs/

.github/workflows/codeql-analysis.yml

@@ -19,9 +19,6 @@ jobs:
       with:
         fetch-depth: 2
 
-    - run: git checkout HEAD^2
-      if: ${{ github.event_name == 'pull_request' }}
-
     - name: Initialize CodeQL
       uses: github/codeql-action/init@v1
       with:

README_TESTED_SENSORS.md

@@ -9,6 +9,7 @@
 * Polar OH1
   Has updatable firmware that requires a user account at polar.com
 * Wahoo Tickr (Model: WFBTHR02)
+* Mi Band 3, Amazfit Band 5, Amazfit Bip. These devices are manufactured by Huami, and other Huami devices will very likely work. Theoretically, this sensor must be enabled, but testing reveals that it works even without enabling. For details on how to enable see [Gadgetbridge wiki](https://codeberg.org/Freeyourgadget/Gadgetbridge/wiki/Huami-Heartrate-measurement#bluetooth-heart-rate-sensor)
 
 ## CSCP: Cycling Cadence and Speed Service
 
@@ -39,4 +40,5 @@ Also the distance is not computed.
 * Elite drivo II
 * QUARQ Red DZero Powermeter
 * Tacx Satori Smart
-* Wahoo Kickr v4.0
+* Wahoo Kickr v4.0
+

RELEASE.sh

@@ -27,7 +27,7 @@ cp "$CHANGELOG_DIR/next_release.txt" "$CHANGELOG_FILE"
 sed -i "s/(versionName)/$VERSIONNAME/" "$CHANGELOG_FILE"
 
 echo -e "\nGit commit since last release\n------------"
-git log $(git describe --tags --abbrev=0)..HEAD --no-merges --oneline
+git log "$(git describe --tags --abbrev=0)..HEAD" --no-merges --oneline
 
 echo -e "\nPlease edit the changelog for the new release"
 gedit -w "$CHANGELOG_FILE"

build.gradle

@@ -51,8 +51,8 @@ android {
 
     defaultConfig {
         applicationId "de.dennisguse.opentracks"
-        versionCode 3740
-        versionName "v3.13.2"
+        versionCode 3799
+        versionName "v3.14.1"
 
         buildConfigField "String", "VERSION_NAME_FULL", "\"${getVersionName()}\""
 
@@ -86,6 +86,7 @@ android {
 }
 
 dependencies {
+    androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0-alpha02'
     coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.1.1'
 
     implementation 'androidx.appcompat:appcompat:1.2.0'
@@ -98,5 +99,5 @@ dependencies {
     androidTestImplementation 'androidx.test.ext:junit:1.1.2'
     androidTestImplementation 'androidx.test:rules:1.3.0'
     androidTestImplementation 'androidx.test:runner:1.3.0'
-    androidTestImplementation 'org.mockito:mockito-android:3.6.0'
+    androidTestImplementation 'org.mockito:mockito-android:3.6.28'
 }

fastlane/metadata/android/en-US/changelogs/3761.txt

@@ -0,0 +1,10 @@
+v3.14.0: OpenTracks
+
+Changes:
+- Properly support for right-to-left
+- Import: faster cleanup after import failure
+- Text in charts scales according to Android settings
+- Heart rate: support for Huami devices (requires Gadgetbridge)
+
+Developer:
+- Import is now handled in-memory

fastlane/metadata/android/en-US/changelogs/3799.txt

@@ -0,0 +1,14 @@
+v3.14.1: OpenTracks
+
+Changes:
+- Added elevation loss (via barometer)
+- Updated translations (cz, gl, it, nb, pl, pt, sp)
+- Markers can be shared from list
+- Actionbar icon (top left) to go back
+- 
+Bugfix:
+- Potential crash on import
+
+Developer:
+- Implemented basic EspressoUI test
+- Reference resourceIds via if rather than switch/case

src/androidTest/java/de/dennisguse/opentracks/EspressoUITest.java

@@ -0,0 +1,168 @@
+package de.dennisguse.opentracks;
+
+import android.view.MotionEvent;
+import android.view.View;
+
+import androidx.test.espresso.UiController;
+import androidx.test.espresso.ViewAction;
+import androidx.test.espresso.ViewInteraction;
+import androidx.test.espresso.action.MotionEvents;
+import androidx.test.ext.junit.rules.ActivityScenarioRule;
+import androidx.test.ext.junit.runners.AndroidJUnit4;
+import androidx.test.filters.LargeTest;
+import androidx.test.rule.GrantPermissionRule;
+
+import com.google.android.material.tabs.TabLayout;
+
+import org.hamcrest.Matcher;
+import org.junit.Rule;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+
+import static androidx.test.espresso.Espresso.onView;
+import static androidx.test.espresso.action.ViewActions.click;
+import static androidx.test.espresso.matcher.ViewMatchers.isDisplayed;
+import static androidx.test.espresso.matcher.ViewMatchers.withId;
+
+@LargeTest
+@RunWith(AndroidJUnit4.class)
+public class EspressoUITest {
+
+    @Rule
+    public ActivityScenarioRule<TrackListActivity> mActivityTestRule = new ActivityScenarioRule<>(TrackListActivity.class);
+
+    @Rule
+    public GrantPermissionRule mGrantPermissionRule = GrantPermissionRule.grant("android.permission.ACCESS_FINE_LOCATION");
+
+    @LargeTest
+    @Test
+    public void record_pause_resume_stop() {
+        {
+            // TrackListActivity: start recording
+            ViewInteraction trackControllerRecordButton = onView(withId(R.id.track_controller_record));
+            trackControllerRecordButton.perform(click());
+        }
+        {
+            // TrackRecordingActivity
+            ViewInteraction trackControllerRecordButton = onView(withId(R.id.track_controller_record));
+            ViewInteraction trackControllerStopButton = onView(withId(R.id.track_controller_stop));
+
+            // wait; stay recording
+            trackControllerRecordButton.perform(waitFor(5000));
+
+            //pause
+            trackControllerRecordButton.perform(veryLongTouch(1600));
+
+            // wait; stay paused
+            trackControllerRecordButton.perform(waitFor(1000));
+
+            // resume
+            trackControllerRecordButton.perform(click());
+
+            // wait; stay recording
+            trackControllerRecordButton.perform(waitFor(1000));
+
+            // stop;
+            trackControllerStopButton.perform(veryLongTouch(1600));
+        }
+    }
+
+    @LargeTest
+    @Test
+    public void record_move_through_tabs() {
+        {
+            // TrackListActivity: start recording
+            ViewInteraction trackControllerRecordButton = onView(withId(R.id.track_controller_record));
+            trackControllerRecordButton.perform(click());
+        }
+        {
+            // TrackRecordingActivity
+            ViewInteraction tabLayout = onView(withId(R.id.track_detail_activity_tablayout));
+            ViewInteraction trackControllerStopButton = onView(withId(R.id.track_controller_stop));
+
+            tabLayout.perform(selectTabAtIndex(1));
+            tabLayout.perform(waitFor(1000));
+
+            tabLayout.perform(selectTabAtIndex(2));
+            tabLayout.perform(waitFor(1000));
+
+            tabLayout.perform(selectTabAtIndex(3));
+            tabLayout.perform(waitFor(1000));
+
+            tabLayout.perform(selectTabAtIndex(0));
+            tabLayout.perform(waitFor(1000));
+
+            // stop
+            trackControllerStopButton.perform(veryLongTouch(1600));
+        }
+    }
+
+    private static ViewAction veryLongTouch(final int duration_ms) {
+        return new ViewAction() {
+            @Override
+            public String getDescription() {
+                return "Perform long touch.";
+            }
+
+            @Override
+            public Matcher<View> getConstraints() {
+                return isDisplayed();
+            }
+
+            @Override
+            public void perform(UiController uiController, final View view) {
+                // Get view absolute position
+                int[] location = new int[2];
+                view.getLocationOnScreen(location);
+
+                // Offset coordinates by view position
+                float[] coordinates = new float[]{location[0] + 1, location[1] + 1};
+
+                // Send down event, pause, and send up
+                MotionEvent down = MotionEvents.sendDown(uiController, coordinates, new float[]{1f, 1f}).down;
+                uiController.loopMainThreadForAtLeast(duration_ms);
+                MotionEvents.sendUp(uiController, down, coordinates);
+            }
+        };
+    }
+
+    private static ViewAction waitFor(final long duration_ms) {
+        return new ViewAction() {
+
+            @Override
+            public String getDescription() {
+                return "Wait for milliseconds.";
+            }
+
+            @Override
+            public Matcher<View> getConstraints() {
+                return isDisplayed();
+            }
+
+            @Override
+            public void perform(UiController uiController, final View view) {
+                uiController.loopMainThreadForAtLeast(duration_ms);
+            }
+        };
+    }
+
+    private static ViewAction selectTabAtIndex(final int index) {
+        return new ViewAction() {
+            @Override
+            public String getDescription() {
+                return "Selecting tab.";
+            }
+
+            @Override
+            public Matcher<View> getConstraints() {
+                return isDisplayed();
+            }
+
+            @Override
+            public void perform(UiController uiController, View view) {
+                TabLayout tabLayout = (TabLayout) view;
+                tabLayout.getTabAt(index).select();
+            }
+        };
+    }
+}

src/androidTest/java/de/dennisguse/opentracks/chart/ChartValueSeriesTest.java

@@ -48,7 +48,9 @@ public class ChartValueSeriesTest {
                 R.string.description_elevation_metric,
                 R.string.description_elevation_imperial,
                 R.color.chart_elevation_fill,
-                R.color.chart_elevation_border) {
+                R.color.chart_elevation_border,
+                15,
+                18) {
             @Override
             double extractDataFromChartPoint(@NonNull ChartPoint chartPoint) {
                 return chartPoint.getElevation();

src/androidTest/java/de/dennisguse/opentracks/content/DescriptionGeneratorTest.java

@@ -64,6 +64,7 @@ public class DescriptionGeneratorTest {
         stats.setMaxElevation(550);
         stats.setMinElevation(-500);
         stats.setTotalElevationGain(6000);
+        stats.setTotalElevationLoss(6000);
         stats.setStartTime_ms(START_TIME);
         track.setTrackStatistics(stats);
         track.setCategory("hiking");
@@ -84,6 +85,7 @@ public class DescriptionGeneratorTest {
                 + "Max elevation: 550 m (1804 ft)<br>"
                 + "Min elevation: -500 m (-1640 ft)<br>"
                 + "Elevation gain: 6000 m (19685 ft)<br>"
+                + "Elevation loss: 6000 m (19685 ft)<br>"
                 + "Recorded: " + StringUtils.formatDateTime(context, START_TIME) + "<br>";
 
         assertEquals(expected, descriptionGenerator.generateTrackDescription(track, true));
@@ -100,6 +102,7 @@ public class DescriptionGeneratorTest {
         stats.setMaxElevation(Double.POSITIVE_INFINITY);
         stats.setMinElevation(Double.NEGATIVE_INFINITY);
         stats.setTotalElevationGain(6000);
+        stats.setTotalElevationLoss(6000);
         stats.setStartTime_ms(START_TIME);
         track.setTrackStatistics(stats);
         track.setCategory("hiking");
@@ -118,6 +121,7 @@ public class DescriptionGeneratorTest {
                         + "Average moving pace: 0:15 min/km (0:24 min/mi)<br>"
                         + "Fastest pace: 0:10 min/km (0:16 min/mi)<br>"
                         + "Elevation gain: 6000 m (19685 ft)<br>"
+                        + "Elevation loss: 6000 m (19685 ft)<br>"
                         + "Recorded: " + StringUtils.formatDateTime(context, START_TIME) + "<br>";
 
         assertEquals(expected, descriptionGenerator.generateTrackDescription(track, true));

src/androidTest/java/de/dennisguse/opentracks/content/data/TestDataUtil.java

@@ -17,6 +17,7 @@ public class TestDataUtil {
     public static final double INITIAL_LONGITUDE = -57.0;
     public static final double ALTITUDE_INTERVAL = 2.5;
     public static final float ELEVATION_GAIN = 3;
+    public static final float ELEVATION_LOSS = 3;
 
     /**
      * Create a track without any trackPoints.
@@ -66,12 +67,13 @@ public class TestDataUtil {
         trackPoint.setAccuracy((float) i / 100.0f);
         trackPoint.setAltitude(i * ALTITUDE_INTERVAL);
         trackPoint.setTime(i + 1);
-        trackPoint.setSpeed(5f + (i / 10));
+        trackPoint.setSpeed(5f + (i / 10f));
 
         trackPoint.setHeartRate_bpm(100f + i);
         trackPoint.setCyclingCadence_rpm(300f + i);
         trackPoint.setPower(400f + i);
         trackPoint.setElevationGain(ELEVATION_GAIN);
+        trackPoint.setElevationLoss(ELEVATION_LOSS);
         return trackPoint;
     }
 
@@ -87,19 +89,19 @@ public class TestDataUtil {
     }
 
     /**
-     * Creates a Waypoint with a photo.
+     * Creates a Marker with a photo.
      *
      * @param context  The context.
      * @param trackId  The track id.
      * @param location The location.
-     * @return the Waypoint created.
+     * @return the Marker created.
      */
-    public static Marker createWaypointWithPhoto(Context context, Track.Id trackId, Location location) throws IOException {
+    public static Marker createMarkerWithPhoto(Context context, Track.Id trackId, Location location) throws IOException {
         File dstFile = new File(FileUtils.getImageUrl(context, trackId));
         dstFile.createNewFile();
         Uri photoUri = FileUtils.getUriForFile(context, dstFile);
         String photoUrl = photoUri.toString();
 
-        return new Marker("Waypoint name", "Waypoint description", "Waypoint category", "", trackId, 0.0, 0, location, photoUrl);
+        return new Marker("Marker name", "Marker description", "Marker category", "", trackId, 0.0, 0, location, photoUrl);
     }
 }

src/androidTest/java/de/dennisguse/opentracks/content/provider/CustomContentProviderUtilsTest.java

@@ -65,7 +65,7 @@ import static org.mockito.Mockito.when;
 @RunWith(MockitoJUnitRunner.class)
 public class CustomContentProviderUtilsTest {
     private static final String NAME_PREFIX = "test name";
-    private static final String MOCK_DESC = "Mock Next Waypoint Desc!";
+    private static final String MOCK_DESC = "Mock Next Marker Desc!";
     private static final String TEST_DESC = "Test Desc!";
     private static final String TEST_DESC_NEW = "Test Desc new!";
     private static final String TEST_NAME_NEW = "Test Name new!";
@@ -198,7 +198,7 @@ public class CustomContentProviderUtilsTest {
         when(cursorMock.isNull(columnIndex)).thenReturn(false);
         when(cursorMock.getString(columnIndex)).thenReturn(name);
 
-        Track track = contentProviderUtils.createTrack(cursorMock);
+        Track track = ContentProviderUtils.createTrack(cursorMock);
         assertEquals(trackId, track.getId());
         assertEquals(name, track.getName());
     }
@@ -208,20 +208,20 @@ public class CustomContentProviderUtilsTest {
      */
     @Test
     public void testDeleteAllTracks() {
-        // Insert track, points and waypoint at first.
+        // Insert track, points and marker at first.
         Track.Id trackId = new Track.Id(System.currentTimeMillis());
         TestDataUtil.createTrackAndInsert(contentProviderUtils, trackId, 10);
 
-        Marker waypoint = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
-        contentProviderUtils.insertMarker(waypoint);
+        Marker marker = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
+        contentProviderUtils.insertMarker(marker);
 
         ContentResolver contentResolver = context.getContentResolver();
         Cursor tracksCursor = contentResolver.query(TracksColumns.CONTENT_URI, null, null, null, TracksColumns._ID);
         assertEquals(1, tracksCursor.getCount());
         Cursor tracksPointsCursor = contentResolver.query(TrackPointsColumns.CONTENT_URI_BY_ID, null, null, null, TrackPointsColumns._ID);
         assertEquals(10, tracksPointsCursor.getCount());
-        Cursor waypointCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
-        assertEquals(1, waypointCursor.getCount());
+        Cursor markerCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
+        assertEquals(1, markerCursor.getCount());
         // Delete all.
         contentProviderUtils.deleteAllTracks(context);
         // Check whether all have been deleted.
@@ -229,32 +229,32 @@ public class CustomContentProviderUtilsTest {
         assertEquals(0, tracksCursor.getCount());
         tracksPointsCursor = contentResolver.query(TrackPointsColumns.CONTENT_URI_BY_ID, null, null, null, TrackPointsColumns._ID);
         assertEquals(0, tracksPointsCursor.getCount());
-        waypointCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
-        assertEquals(0, waypointCursor.getCount());
+        markerCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
+        assertEquals(0, markerCursor.getCount());
     }
 
     /**
      * Tests the method {@link ContentProviderUtils#deleteAllTracks(Context)}
      */
     @Test
-    public void testDeleteAllTracks_withWaypointAndPhoto() throws IOException {
-        // Insert track, points and waypoint with photo at first.
+    public void testDeleteAllTracks_withMarkerAndPhoto() throws IOException {
+        // Insert track, points and marker with photo at first.
         Track.Id trackId = new Track.Id(System.currentTimeMillis());
         Track track = TestDataUtil.createTrackAndInsert(contentProviderUtils, trackId, 10);
 
         TrackPoint trackPoint = contentProviderUtils.getLastValidTrackPoint(trackId);
-        Marker waypoint = TestDataUtil.createWaypointWithPhoto(context, trackId, trackPoint.getLocation());
-        contentProviderUtils.insertMarker(waypoint);
+        Marker marker = TestDataUtil.createMarkerWithPhoto(context, trackId, trackPoint.getLocation());
+        contentProviderUtils.insertMarker(marker);
 
         ContentResolver contentResolver = context.getContentResolver();
         Cursor tracksCursor = contentResolver.query(TracksColumns.CONTENT_URI, null, null, null, TracksColumns._ID);
         assertEquals(1, tracksCursor.getCount());
         Cursor tracksPointsCursor = contentResolver.query(TrackPointsColumns.CONTENT_URI_BY_ID, null, null, null, TrackPointsColumns._ID);
         assertEquals(10, tracksPointsCursor.getCount());
-        Cursor waypointCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
-        assertEquals(1, waypointCursor.getCount());
-        // Check waypoint has photo and it's in the external storage.
-        assertTrue(waypoint.hasPhoto());
+        Cursor markerCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
+        assertEquals(1, markerCursor.getCount());
+        // Check marker has photo and it's in the external storage.
+        assertTrue(marker.hasPhoto());
         File dir = FileUtils.getPhotoDir(context, trackId);
         assertTrue(dir.isDirectory());
         assertEquals(1, dir.list().length);
@@ -266,8 +266,8 @@ public class CustomContentProviderUtilsTest {
         assertEquals(0, tracksCursor.getCount());
         tracksPointsCursor = contentResolver.query(TrackPointsColumns.CONTENT_URI_BY_ID, null, null, null, TrackPointsColumns._ID);
         assertEquals(0, tracksPointsCursor.getCount());
-        waypointCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
-        assertEquals(0, waypointCursor.getCount());
+        markerCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
+        assertEquals(0, markerCursor.getCount());
         assertFalse(dir.exists());
     }
 
@@ -287,16 +287,16 @@ public class CustomContentProviderUtilsTest {
         TestDataUtil.createTrackAndInsert(contentProviderUtils, trackId2, 10);
         TestDataUtil.createTrackAndInsert(contentProviderUtils, trackId3, 10);
 
-        Marker waypoint = new Marker(trackId1, contentProviderUtils.getLastValidTrackPoint(trackId2));
-        contentProviderUtils.insertMarker(waypoint);
+        Marker marker = new Marker(trackId1, contentProviderUtils.getLastValidTrackPoint(trackId2));
+        contentProviderUtils.insertMarker(marker);
 
         ContentResolver contentResolver = context.getContentResolver();
         Cursor tracksCursor = contentResolver.query(TracksColumns.CONTENT_URI, null, null, null, TracksColumns._ID);
         assertEquals(3, tracksCursor.getCount());
         Cursor tracksPointsCursor = contentResolver.query(TrackPointsColumns.CONTENT_URI_BY_ID, null, null, null, TrackPointsColumns._ID);
         assertEquals(20, tracksPointsCursor.getCount());
-        Cursor waypointCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
-        assertEquals(1, waypointCursor.getCount());
+        Cursor markerCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
+        assertEquals(1, markerCursor.getCount());
         // Delete one track.
         contentProviderUtils.deleteTrack(context, trackId1);
         // Check whether all data of a track has been deleted.
@@ -304,15 +304,15 @@ public class CustomContentProviderUtilsTest {
         assertEquals(2, tracksCursor.getCount());
         tracksPointsCursor = contentResolver.query(TrackPointsColumns.CONTENT_URI_BY_ID, null, null, null, TrackPointsColumns._ID);
         assertEquals(20, tracksPointsCursor.getCount());
-        waypointCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
-        assertEquals(0, waypointCursor.getCount());
+        markerCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
+        assertEquals(0, markerCursor.getCount());
     }
 
     /**
      * Tests the method {@link ContentProviderUtils#deleteTrack(Context, Track.Id)}.
      */
     @Test
-    public void testDeleteTrack_withWaypointPhoto() throws IOException {
+    public void testDeleteTrack_withMarkerPhoto() throws IOException {
         // Insert three tracks.
         long random = System.currentTimeMillis();
         Track.Id trackId1 = new Track.Id(random);
@@ -323,15 +323,15 @@ public class CustomContentProviderUtilsTest {
         TestDataUtil.createTrackAndInsert(contentProviderUtils, trackId2, 10);
         TestDataUtil.createTrackAndInsert(contentProviderUtils, trackId3, 10);
 
-        // Insert a waypoint in tracks trackId and trackId + 1.
+        // Insert a marker in tracks trackId and trackId + 1.
         TrackPoint trackPoint1 = contentProviderUtils.getLastValidTrackPoint(trackId1);
-        Marker waypoint1 = TestDataUtil.createWaypointWithPhoto(context, trackId1, trackPoint1.getLocation());
-        contentProviderUtils.insertMarker(waypoint1);
+        Marker marker1 = TestDataUtil.createMarkerWithPhoto(context, trackId1, trackPoint1.getLocation());
+        contentProviderUtils.insertMarker(marker1);
         File dir1 = FileUtils.getPhotoDir(context, trackId1);
 
         TrackPoint trackPoint2 = contentProviderUtils.getLastValidTrackPoint(trackId2);
-        Marker waypoint2 = TestDataUtil.createWaypointWithPhoto(context, trackId2, trackPoint2.getLocation());
-        contentProviderUtils.insertMarker(waypoint2);
+        Marker marker2 = TestDataUtil.createMarkerWithPhoto(context, trackId2, trackPoint2.getLocation());
+        contentProviderUtils.insertMarker(marker2);
         File dir2 = FileUtils.getPhotoDir(context, trackId2);
 
         // Check.
@@ -340,9 +340,9 @@ public class CustomContentProviderUtilsTest {
         assertEquals(3, tracksCursor.getCount());
         Cursor tracksPointsCursor = contentResolver.query(TrackPointsColumns.CONTENT_URI_BY_ID, null, null, null, TrackPointsColumns._ID);
         assertEquals(30, tracksPointsCursor.getCount());
-        Cursor waypointCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
-        assertEquals(2, waypointCursor.getCount());
-        assertTrue(waypoint1.hasPhoto());
+        Cursor markerCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
+        assertEquals(2, markerCursor.getCount());
+        assertTrue(marker1.hasPhoto());
         assertTrue(dir1.isDirectory());
         assertEquals(1, dir1.list().length);
         assertTrue(dir1.exists());
@@ -356,8 +356,8 @@ public class CustomContentProviderUtilsTest {
         assertEquals(2, tracksCursor.getCount());
         tracksPointsCursor = contentResolver.query(TrackPointsColumns.CONTENT_URI_BY_ID, null, null, null, TrackPointsColumns._ID);
         assertEquals(20, tracksPointsCursor.getCount());
-        waypointCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
-        assertEquals(1, waypointCursor.getCount());
+        markerCursor = contentResolver.query(MarkerColumns.CONTENT_URI, null, null, null, MarkerColumns._ID);
+        assertEquals(1, markerCursor.getCount());
         assertFalse(dir1.exists());
         assertTrue(dir2.exists());
     }
@@ -380,16 +380,6 @@ public class CustomContentProviderUtilsTest {
         assertEquals(trackId, allTracks.get(allTracks.size() - 1).getId());
     }
 
-    /**
-     * Tests the method {@link ContentProviderUtils#getLastTrack()}
-     */
-    @Test
-    public void testGetLastTrack() {
-        Track.Id trackId = new Track.Id(System.currentTimeMillis());
-        contentProviderUtils.insertTrack(TestDataUtil.createTrack(trackId));
-        assertEquals(trackId, contentProviderUtils.getLastTrack().getId());
-    }
-
     /**
      * Tests the method {@link ContentProviderUtils#getTrack(Track.Id)}
      */
@@ -441,7 +431,7 @@ public class CustomContentProviderUtilsTest {
      * Tests the method {@link ContentProviderUtils#createContentValues(Marker)}.
      */
     @Test
-    public void testCreateContentValues_waypoint() {
+    public void testCreateContentValues_marker() {
         Track.Id trackId = new Track.Id(System.currentTimeMillis());
         Pair<Track, TrackPoint[]> track = TestDataUtil.createTrack(trackId, 10);
 
@@ -462,16 +452,16 @@ public class CustomContentProviderUtilsTest {
         track.first.setTrackStatistics(statistics);
         contentProviderUtils.insertTrack(track.first);
 
-        Marker waypoint = new Marker(trackId, track.second[0]);
-        waypoint.setDescription(TEST_DESC);
-        contentProviderUtils.insertMarker(waypoint);
+        Marker marker = new Marker(trackId, track.second[0]);
+        marker.setDescription(TEST_DESC);
+        contentProviderUtils.insertMarker(marker);
 
         ContentProviderUtils contentProviderUtils = new ContentProviderUtils(contentResolverMock);
 
-        Marker.Id waypointId = new Marker.Id(System.currentTimeMillis());
-        waypoint.setId(waypointId);
-        ContentValues contentValues = contentProviderUtils.createContentValues(waypoint);
-        assertEquals(waypointId.getId(), contentValues.get(MarkerColumns._ID));
+        Marker.Id markerId = new Marker.Id(System.currentTimeMillis());
+        marker.setId(markerId);
+        ContentValues contentValues = contentProviderUtils.createContentValues(marker);
+        assertEquals(markerId.getId(), contentValues.get(MarkerColumns._ID));
         assertEquals((int) (TestDataUtil.INITIAL_LONGITUDE * 1000000), contentValues.get(MarkerColumns.LONGITUDE));
         assertEquals(TEST_DESC, contentValues.get(MarkerColumns.DESCRIPTION));
     }
@@ -480,7 +470,7 @@ public class CustomContentProviderUtilsTest {
      * Tests the method {@link ContentProviderUtils#createMarker(Cursor)}.
      */
     @Test
-    public void testCreateWaypoint() {
+    public void testCreateMarker() {
         int startColumnIndex = 1;
         int columnIndex = startColumnIndex;
         when(cursorMock.getColumnIndexOrThrow(MarkerColumns._ID)).thenReturn(columnIndex++);
@@ -504,80 +494,80 @@ public class CustomContentProviderUtilsTest {
         long trackId = 11L;
         when(cursorMock.getLong(columnIndex++)).thenReturn(trackId);
 
-        Marker waypoint = contentProviderUtils.createMarker(cursorMock);
-        assertEquals(id, waypoint.getId().getId());
-        assertEquals(name, waypoint.getName());
-        assertEquals(trackId, waypoint.getTrackId().getId());
+        Marker marker = contentProviderUtils.createMarker(cursorMock);
+        assertEquals(id, marker.getId().getId());
+        assertEquals(name, marker.getName());
+        assertEquals(trackId, marker.getTrackId().getId());
     }
 
     /**
      * Tests the method
      * {@link ContentProviderUtils#deleteMarker(Context, Marker.Id)}
-     * when there is only one waypoint in the track.
+     * when there is only one marker in the track.
      */
     @Test
-    public void testDeleteWaypoint_onlyOneWayPoint() {
+    public void testDeleteMarker_onlyOneMarker() {
         Track.Id trackId = new Track.Id(System.currentTimeMillis());
         TestDataUtil.createTrackAndInsert(contentProviderUtils, trackId, 10);
 
         // Insert at first.
-        Marker waypoint1 = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
-        waypoint1.setDescription(TEST_DESC);
-        contentProviderUtils.insertMarker(waypoint1);
+        Marker marker1 = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
+        marker1.setDescription(TEST_DESC);
+        contentProviderUtils.insertMarker(marker1);
 
         // Check insert was done.
         assertEquals(contentProviderUtils.getMarkerCount(trackId), 1);
 
-        // Get waypoint id that needs to delete.
-        Marker.Id waypoint1Id = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(waypoint1)));
+        // Get marker id that needs to delete.
+        Marker.Id marker1Id = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(marker1)));
 
         // Delete
-        contentProviderUtils.deleteMarker(context, waypoint1Id);
+        contentProviderUtils.deleteMarker(context, marker1Id);
 
-        assertNull(contentProviderUtils.getMarker(waypoint1Id));
+        assertNull(contentProviderUtils.getMarker(marker1Id));
     }
 
     /**
      * Tests the method
      * {@link ContentProviderUtils#deleteMarker(Context, Marker.Id)}
-     * when there is only one waypoint in the track.
+     * when there is only one marker in the track.
      */
     @Test
-    public void testDeleteWaypoint_onlyOneWayPointWithPhotoUrl() throws IOException {
+    public void testDeleteMarker_onlyOneMarkerWithPhotoUrl() throws IOException {
         Track.Id trackId = new Track.Id(System.currentTimeMillis());
         TestDataUtil.createTrackAndInsert(contentProviderUtils, trackId, 10);
 
         // Insert at first.
         TrackPoint trackPoint = contentProviderUtils.getLastValidTrackPoint(trackId);
-        Marker waypoint1 = TestDataUtil.createWaypointWithPhoto(context, trackId, trackPoint.getLocation());
-        contentProviderUtils.insertMarker(waypoint1);
+        Marker marker1 = TestDataUtil.createMarkerWithPhoto(context, trackId, trackPoint.getLocation());
+        contentProviderUtils.insertMarker(marker1);
 
         // Check insert was done.
         assertEquals(contentProviderUtils.getMarkerCount(trackId), 1);
 
-        // Get waypoint id that needs to delete.
-        Marker.Id waypoint1Id = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(waypoint1)));
+        // Get marker id that needs to delete.
+        Marker.Id marker1Id = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(marker1)));
 
-        // Check waypoint has photo and it's in the external storage.
-        assertTrue(waypoint1.hasPhoto());
+        // Check marker has photo and it's in the external storage.
+        assertTrue(marker1.hasPhoto());
         File dir = FileUtils.getPhotoDir(context, trackId);
         assertTrue(dir.isDirectory());
         assertEquals(1, dir.list().length);
         assertTrue(dir.exists());
 
         // Delete
-        contentProviderUtils.deleteMarker(context, waypoint1Id);
+        contentProviderUtils.deleteMarker(context, marker1Id);
 
-        // Check waypoint doesn't exists and photo folder was deleted.
-        assertNull(contentProviderUtils.getMarker(waypoint1Id));
+        // Check marker doesn't exists and photo folder was deleted.
+        assertNull(contentProviderUtils.getMarker(marker1Id));
         assertFalse(dir.exists());
     }
 
     /**
-     * Tests the method {@link ContentProviderUtils#deleteMarker(Context, Marker.Id)} when there is more than one waypoint in the track.
+     * Tests the method {@link ContentProviderUtils#deleteMarker(Context, Marker.Id)} when there is more than one marker in the track.
      */
     @Test
-    public void testDeleteWaypoint_hasNextWayPoint() {
+    public void testDeleteMarker_hasNextMarker() {
         Track.Id trackId = new Track.Id(System.currentTimeMillis());
         TestDataUtil.createTrackAndInsert(contentProviderUtils, trackId, 10);
 
@@ -598,38 +588,38 @@ public class CustomContentProviderUtilsTest {
 //        TestDataUtil.insertTrackWithLocations(contentProviderUtils, track);
 
         // Insert at first.
-        Marker waypoint1 = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
-        waypoint1.setDescription(MOCK_DESC);
-        Marker.Id waypoint1Id = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(waypoint1)));
+        Marker marker1 = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
+        marker1.setDescription(MOCK_DESC);
+        Marker.Id marker1Id = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(marker1)));
 
-        Marker waypoint2 = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
-        waypoint2.setDescription(MOCK_DESC);
-        Marker.Id waypoint2Id = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(waypoint2)));
+        Marker marker2 = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
+        marker2.setDescription(MOCK_DESC);
+        Marker.Id marker2Id = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(marker2)));
 
         // Delete
-        assertNotNull(contentProviderUtils.getMarker(waypoint1Id));
-        contentProviderUtils.deleteMarker(context, waypoint1Id);
-        assertNull(contentProviderUtils.getMarker(waypoint1Id));
+        assertNotNull(contentProviderUtils.getMarker(marker1Id));
+        contentProviderUtils.deleteMarker(context, marker1Id);
+        assertNull(contentProviderUtils.getMarker(marker1Id));
 
-        assertEquals(MOCK_DESC, contentProviderUtils.getMarker(waypoint2Id).getDescription());
+        assertEquals(MOCK_DESC, contentProviderUtils.getMarker(marker2Id).getDescription());
     }
 
     /**
      * Tests the method {@link ContentProviderUtils#getNextMarkerNumber(Track.Id)}.
      */
     @Test
-    public void testGetNextWaypointNumber() {
+    public void testGetNextMarkerNumber() {
         Track.Id trackId = new Track.Id(System.currentTimeMillis());
         TestDataUtil.createTrackAndInsert(contentProviderUtils, trackId, 10);
 
-        Marker waypoint1 = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
-        Marker waypoint2 = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
-        Marker waypoint3 = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
-        Marker waypoint4 = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
-        contentProviderUtils.insertMarker(waypoint1);
-        contentProviderUtils.insertMarker(waypoint2);
-        contentProviderUtils.insertMarker(waypoint3);
-        contentProviderUtils.insertMarker(waypoint4);
+        Marker marker1 = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
+        Marker marker2 = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
+        Marker marker3 = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
+        Marker marker4 = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
+        contentProviderUtils.insertMarker(marker1);
+        contentProviderUtils.insertMarker(marker2);
+        contentProviderUtils.insertMarker(marker3);
+        contentProviderUtils.insertMarker(marker4);
 
         assertEquals(4, contentProviderUtils.getNextMarkerNumber(trackId));
     }
@@ -639,53 +629,53 @@ public class CustomContentProviderUtilsTest {
      * {@link ContentProviderUtils#getMarker(Marker.Id)}.
      */
     @Test
-    public void testInsertAndGetWaypoint() {
+    public void testInsertAndGetMarker() {
         Track.Id trackId = new Track.Id(System.currentTimeMillis());
         TestDataUtil.createTrackAndInsert(contentProviderUtils, trackId, 10);
 
-        Marker waypoint = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
-        waypoint.setDescription(TEST_DESC);
-        Marker.Id waypointId = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(waypoint)));
+        Marker marker = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
+        marker.setDescription(TEST_DESC);
+        Marker.Id markerId = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(marker)));
 
-        assertEquals(TEST_DESC, contentProviderUtils.getMarker(waypointId).getDescription());
+        assertEquals(TEST_DESC, contentProviderUtils.getMarker(markerId).getDescription());
     }
 
     /**
      * Tests the method {@link ContentProviderUtils#updateMarker(Context, Marker)}.
      */
     @Test
-    public void testUpdateWaypoint() {
+    public void testUpdateMarker() {
         Track.Id trackId = new Track.Id(System.currentTimeMillis());
         TestDataUtil.createTrackAndInsert(contentProviderUtils, trackId, 10);
 
         // Insert at first.
-        Marker waypoint = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
-        waypoint.setDescription(TEST_DESC);
-        Marker.Id waypointId = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(waypoint)));
+        Marker marker = new Marker(trackId, contentProviderUtils.getLastValidTrackPoint(trackId));
+        marker.setDescription(TEST_DESC);
+        Marker.Id markerId = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(marker)));
 
         // Update
-        waypoint = contentProviderUtils.getMarker(waypointId);
-        waypoint.setDescription(TEST_DESC_NEW);
-        contentProviderUtils.updateMarker(context, waypoint);
+        marker = contentProviderUtils.getMarker(markerId);
+        marker.setDescription(TEST_DESC_NEW);
+        contentProviderUtils.updateMarker(context, marker);
 
-        assertEquals(TEST_DESC_NEW, contentProviderUtils.getMarker(waypointId).getDescription());
+        assertEquals(TEST_DESC_NEW, contentProviderUtils.getMarker(markerId).getDescription());
     }
 
     /**
      * Tests the method {@link ContentProviderUtils#updateMarker(Context, Marker)}.
      */
     @Test
-    public void testUpdateWaypoint_withPhoto() throws IOException {
-        // tests after update waypoint with photo the photo remains in the storage.
+    public void testUpdateMarker_withPhoto() throws IOException {
+        // tests after update marker with photo the photo remains in the storage.
 
         Track.Id trackId = new Track.Id(System.currentTimeMillis());
         TestDataUtil.createTrackAndInsert(contentProviderUtils, trackId, 10);
 
         // Insert at first.
         TrackPoint trackPoint = contentProviderUtils.getLastValidTrackPoint(trackId);
-        Marker waypoint = TestDataUtil.createWaypointWithPhoto(context, trackId, trackPoint.getLocation());
-        waypoint.setDescription(TEST_DESC);
-        Marker.Id waypointId = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(waypoint)));
+        Marker marker = TestDataUtil.createMarkerWithPhoto(context, trackId, trackPoint.getLocation());
+        marker.setDescription(TEST_DESC);
+        Marker.Id markerId = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(marker)));
 
         File dir = new File(FileUtils.getPhotoDir(context), "" + trackId.getId());
         assertTrue(dir.exists());
@@ -693,14 +683,14 @@ public class CustomContentProviderUtilsTest {
         assertEquals(1, dir.list().length);
 
         // Update
-        waypoint = contentProviderUtils.getMarker(waypointId);
-        waypoint.setName(TEST_NAME_NEW);
-        waypoint.setDescription(TEST_DESC_NEW);
-        contentProviderUtils.updateMarker(context, waypoint);
+        marker = contentProviderUtils.getMarker(markerId);
+        marker.setName(TEST_NAME_NEW);
+        marker.setDescription(TEST_DESC_NEW);
+        contentProviderUtils.updateMarker(context, marker);
 
-        assertEquals(TEST_NAME_NEW, contentProviderUtils.getMarker(waypointId).getName());
-        assertEquals(TEST_DESC_NEW, contentProviderUtils.getMarker(waypointId).getDescription());
-        assertTrue(waypoint.hasPhoto());
+        assertEquals(TEST_NAME_NEW, contentProviderUtils.getMarker(markerId).getName());
+        assertEquals(TEST_DESC_NEW, contentProviderUtils.getMarker(markerId).getDescription());
+        assertTrue(marker.hasPhoto());
         assertTrue(dir.exists());
         assertTrue(dir.isDirectory());
         assertEquals(1, dir.list().length);
@@ -710,17 +700,17 @@ public class CustomContentProviderUtilsTest {
      * Tests the method {@link ContentProviderUtils#updateMarker(Context, Marker)}.
      */
     @Test
-    public void testUpdateWaypoint_delPhotoAndDir() throws IOException {
-        // tests after update waypoint if user deletes the photo then file photo is deleted from the storage. Also empty directory is deleted.
+    public void testUpdateMarker_delPhotoAndDir() throws IOException {
+        // tests after update marker if user deletes the photo then file photo is deleted from the storage. Also empty directory is deleted.
 
         Track.Id trackId = new Track.Id(System.currentTimeMillis());
         TestDataUtil.createTrackAndInsert(contentProviderUtils, trackId, 10);
 
         // Insert at first.
         TrackPoint trackPoint = contentProviderUtils.getLastValidTrackPoint(trackId);
-        Marker waypoint = TestDataUtil.createWaypointWithPhoto(context, trackId, trackPoint.getLocation());
-        waypoint.setDescription(TEST_DESC);
-        Marker.Id waypointId = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(waypoint)));
+        Marker marker = TestDataUtil.createMarkerWithPhoto(context, trackId, trackPoint.getLocation());
+        marker.setDescription(TEST_DESC);
+        Marker.Id markerId = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(marker)));
 
         File dir = new File(FileUtils.getPhotoDir(context), "" + trackId.getId());
         assertTrue(dir.exists());
@@ -728,15 +718,15 @@ public class CustomContentProviderUtilsTest {
         assertEquals(1, dir.list().length);
 
         // Update
-        waypoint = contentProviderUtils.getMarker(waypointId);
-        waypoint.setName(TEST_NAME_NEW);
-        waypoint.setDescription(TEST_DESC_NEW);
-        waypoint.setPhotoUrl(null);
-        contentProviderUtils.updateMarker(context, waypoint);
+        marker = contentProviderUtils.getMarker(markerId);
+        marker.setName(TEST_NAME_NEW);
+        marker.setDescription(TEST_DESC_NEW);
+        marker.setPhotoUrl(null);
+        contentProviderUtils.updateMarker(context, marker);
 
-        assertEquals(TEST_NAME_NEW, contentProviderUtils.getMarker(waypointId).getName());
-        assertEquals(TEST_DESC_NEW, contentProviderUtils.getMarker(waypointId).getDescription());
-        assertFalse(waypoint.hasPhoto());
+        assertEquals(TEST_NAME_NEW, contentProviderUtils.getMarker(markerId).getName());
+        assertEquals(TEST_DESC_NEW, contentProviderUtils.getMarker(markerId).getDescription());
+        assertFalse(marker.hasPhoto());
         assertFalse(dir.exists());
     }
 
@@ -744,33 +734,33 @@ public class CustomContentProviderUtilsTest {
      * Tests the method {@link ContentProviderUtils#updateMarker(Context, Marker)}.
      */
     @Test
-    public void testUpdateWaypoint_delPhotoNotDir() throws IOException {
-        // tests after update waypoint if user deletes the photo then file photo is deleted from the storage. Directory remains if there are more photos from other waypoints.
+    public void testUpdateMarker_delPhotoNotDir() throws IOException {
+        // tests after update marker if user deletes the photo then file photo is deleted from the storage. Directory remains if there are more photos from other markers.
 
         Track.Id trackId = new Track.Id(System.currentTimeMillis());
         TestDataUtil.createTrackAndInsert(contentProviderUtils, trackId, 10);
 
-        // Insert two waypoints with photos.
+        // Insert two markers with photos.
         TrackPoint trackPoint = contentProviderUtils.getLastValidTrackPoint(trackId);
-        Marker waypoint = TestDataUtil.createWaypointWithPhoto(context, trackId, trackPoint.getLocation());
-        waypoint.setDescription(TEST_DESC);
-        Marker otherWaypoint = TestDataUtil.createWaypointWithPhoto(context, trackId, trackPoint.getLocation());
-        otherWaypoint.setDescription(TEST_DESC);
-        Marker.Id waypointId = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(waypoint)));
-        contentProviderUtils.insertMarker(otherWaypoint);
+        Marker marker = TestDataUtil.createMarkerWithPhoto(context, trackId, trackPoint.getLocation());
+        marker.setDescription(TEST_DESC);
+        Marker otherMarker = TestDataUtil.createMarkerWithPhoto(context, trackId, trackPoint.getLocation());
+        otherMarker.setDescription(TEST_DESC);
+        Marker.Id markerId = new Marker.Id(ContentUris.parseId(contentProviderUtils.insertMarker(marker)));
+        contentProviderUtils.insertMarker(otherMarker);
 
         File dir = new File(FileUtils.getPhotoDir(context), "" + trackId.getId());
         assertTrue(dir.exists());
         assertTrue(dir.isDirectory());
         assertEquals(2, dir.list().length);
 
-        // Update one waypoint deleting photo.
-        waypoint = contentProviderUtils.getMarker(waypointId);
-        waypoint.setPhotoUrl(null);
-        contentProviderUtils.updateMarker(context, waypoint);
+        // Update one marker deleting photo.
+        marker = contentProviderUtils.getMarker(markerId);
+        marker.setPhotoUrl(null);
+        contentProviderUtils.updateMarker(context, marker);
 
-        assertEquals(TEST_DESC, contentProviderUtils.getMarker(waypointId).getDescription());
-        assertFalse(waypoint.hasPhoto());
+        assertEquals(TEST_DESC, contentProviderUtils.getMarker(markerId).getDescription());
+        assertFalse(marker.hasPhoto());
         assertTrue(dir.exists());
         assertTrue(dir.isDirectory());
         assertEquals(1, dir.list().length);

src/androidTest/java/de/dennisguse/opentracks/fragments/ChartFragmentTest.java

@@ -28,7 +28,6 @@ import org.junit.BeforeClass;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
-import de.dennisguse.opentracks.TrackStubUtils;
 import de.dennisguse.opentracks.chart.ChartPoint;
 import de.dennisguse.opentracks.chart.ChartView;
 import de.dennisguse.opentracks.content.data.TrackPoint;

src/androidTest/java/de/dennisguse/opentracks/fragments/TrackStubUtils.java

@@ -14,7 +14,7 @@
  * the License.
  */
 
-package de.dennisguse.opentracks;
+package de.dennisguse.opentracks.fragments;
 
 import android.location.Location;
 

src/androidTest/java/de/dennisguse/opentracks/io/file/importer/AbstractTestFileTrackImporter.java

@@ -1,131 +0,0 @@
-/*
- * Copyright 2012 Google Inc.
- *
- * Licensed under the Apache License, Version 2.0 (the "License"); you may not
- * use this file except in compliance with the License. You may obtain a copy of
- * the License at
- *
- * http://www.apache.org/licenses/LICENSE-2.0
- *
- * Unless required by applicable law or agreed to in writing, software
- * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
- * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
- * License for the specific language governing permissions and limitations under
- * the License.
- */
-
-package de.dennisguse.opentracks.io.file.importer;
-
-import android.content.ContentUris;
-import android.content.Context;
-import android.location.Location;
-import android.location.LocationManager;
-import android.net.Uri;
-
-import androidx.test.core.app.ApplicationProvider;
-
-import org.mockito.ArgumentCaptor;
-import org.mockito.Mock;
-
-import java.text.SimpleDateFormat;
-import java.time.ZoneOffset;
-import java.util.Locale;
-import java.util.SimpleTimeZone;
-import java.util.TimeZone;
-
-import de.dennisguse.opentracks.content.data.MarkerColumns;
-import de.dennisguse.opentracks.content.data.Track;
-import de.dennisguse.opentracks.content.data.TrackPoint;
-import de.dennisguse.opentracks.content.provider.ContentProviderUtils;
-
-import static org.junit.Assert.assertEquals;
-import static org.mockito.Mockito.any;
-import static org.mockito.Mockito.eq;
-import static org.mockito.Mockito.when;
-
-/**
- * Abstract class for testing file track importers.
- *
- * @author Jimmy Shih.
- */
-public abstract class AbstractTestFileTrackImporter {
-
-    static final String TRACK_NAME_0 = "blablub";
-    static final String TRACK_DESCRIPTION_0 = "s'Laebe isch koi Schlotzer";
-
-    static final double TRACK_LATITUDE = 48.768364;
-    static final double TRACK_LONGITUDE = 9.177886;
-    static final double TRACK_ELEVATION = 324.0;
-
-    static final String TRACK_TIME_0 = "2010-04-22T18:21:00Z";
-    static final String TRACK_TIME_1 = "2010-04-22T18:21:50.123Z";
-    static final String TRACK_TIME_2 = "2010-04-22T18:23:00.123Z";
-    static final String TRACK_TIME_3 = "2010-04-22T18:24:50.123Z";
-
-    static final SimpleDateFormat DATE_FORMAT_0 = new SimpleDateFormat("yyyy-MM-dd'T'hh:mm:ss'Z'", Locale.US);
-    static final SimpleDateFormat DATE_FORMAT_1 = new SimpleDateFormat("yyyy-MM-dd'T'HH:mm:ss.SSS", Locale.US);
-
-    static final long TRACK_POINT_ID_0 = 1;
-    static final long TRACK_POINT_ID_1 = 2;
-    static final long TRACK_POINT_ID_3 = 4;
-
-    private static final long WAYPOINT_ID_0 = 1;
-    private static final Uri WAYPOINT_ID_O_URI = ContentUris.appendId(MarkerColumns.CONTENT_URI.buildUpon(), WAYPOINT_ID_0).build();
-
-    protected final Context context = ApplicationProvider.getApplicationContext();
-
-    static {
-        // We can't omit the timezones in the test, otherwise it'll use the local timezone and fail depending on where the test runner is.
-        TimeZone utc = SimpleTimeZone.getTimeZone(ZoneOffset.UTC);
-        DATE_FORMAT_0.setTimeZone(utc);
-        DATE_FORMAT_1.setTimeZone(utc);
-    }
-
-    @Mock
-    public ContentProviderUtils contentProviderUtils;
-
-    TrackPoint createTrackPoint(int index, long time) {
-        Location trackPoint = new Location(LocationManager.GPS_PROVIDER);
-        trackPoint.setLatitude(TRACK_LATITUDE + index);
-        trackPoint.setLongitude(TRACK_LONGITUDE + index);
-        trackPoint.setAltitude(TRACK_ELEVATION + index);
-        trackPoint.setTime(time);
-        return new TrackPoint(trackPoint);
-    }
-
-    /**
-     * Expects the first track point to be added.
-     *
-     * @param trackPoint   the trackPoint
-     * @param trackId      the track id
-     * @param trackPointId the track point id
-     */
-    protected void expectFirstTrackPoint(TrackPoint trackPoint, Track.Id trackId, long trackPointId) {
-        when(contentProviderUtils.bulkInsertTrackPoint(trackPoint != null ? (TrackPoint[]) any() : (TrackPoint[]) any(), eq(trackId))).thenReturn(1);
-    }
-
-    /**
-     * Expects the track to be updated.
-     *
-     * @param trackCaptor the track
-     * @param lastTrack   true if it is the last track in the gpx
-     * @param trackId     the track id
-     */
-    protected void expectTrackUpdate(ArgumentCaptor<Track> trackCaptor, boolean lastTrack, Track.Id trackId) {
-        contentProviderUtils.updateTrack(trackCaptor.capture());
-
-        when(contentProviderUtils.insertMarker(any())).thenReturn(WAYPOINT_ID_O_URI);
-        if (lastTrack) {
-            // Return null to not add waypoints
-            when(contentProviderUtils.getTrack(trackId)).thenReturn(null);
-        }
-    }
-
-    protected void verifyTrack(Track track, String name, String description, long time) {
-        assertEquals(name, track.getName());
-        assertEquals(description, track.getDescription());
-        if (time != -1L) {
-            assertEquals(time, track.getTrackStatistics().getStartTime_ms());
-        }
-    }
-}

src/androidTest/java/de/dennisguse/opentracks/io/file/importer/ExportImportTest.java

@@ -135,7 +135,7 @@ public class ExportImportTest {
         assertMarkers();
 
         // 3. trackpoints
-        assertTrackpoints(false, false, false, false);
+        assertTrackpoints(false, false, false, false, false);
     }
 
     @LargeTest
@@ -170,7 +170,7 @@ public class ExportImportTest {
         assertMarkers();
 
         // 3. trackpoints
-        assertTrackpoints(true, true, true, true);
+        assertTrackpoints(true, true, true, true, true);
     }
 
     @LargeTest
@@ -263,7 +263,7 @@ public class ExportImportTest {
         assertMarkers();
 
         // 3. trackpoints
-        assertTrackpoints(false, true, true, false);
+        assertTrackpoints(false, true, true, true, true);
     }
 
     @LargeTest
@@ -310,7 +310,7 @@ public class ExportImportTest {
         }
     }
 
-    private void assertTrackpoints(boolean verifyPower, boolean verifyHeartrate, boolean verifyCadence, boolean verifyElevationGain) {
+    private void assertTrackpoints(boolean verifyPower, boolean verifyHeartrate, boolean verifyCadence, boolean verifyElevationGain, boolean verifyElevationLoss) {
         List<TrackPoint> importedTrackPoints = contentProviderUtils.getTrackPoints(importTrackId);
         assertEquals(trackPoints.size(), importedTrackPoints.size());
 
@@ -339,6 +339,9 @@ public class ExportImportTest {
             if (verifyElevationGain) {
                 assertEquals(trackPoint.getElevationGain(), importedTrackPoint.getElevationGain(), 0.01);
             }
+            if (verifyElevationLoss) {
+                assertEquals(trackPoint.getElevationLoss(), importedTrackPoint.getElevationLoss(), 0.01);
+            }
         }
     }
 }

src/androidTest/java/de/dennisguse/opentracks/io/file/importer/LegacyKmlImportTest.java

@@ -0,0 +1,93 @@
+package de.dennisguse.opentracks.io.file.importer;
+
+import android.content.Context;
+
+import androidx.test.core.app.ApplicationProvider;
+import androidx.test.filters.LargeTest;
+import androidx.test.platform.app.InstrumentationRegistry;
+
+import org.junit.After;
+import org.junit.Test;
+import org.junit.runner.RunWith;
+import org.junit.runners.JUnit4;
+
+import java.io.InputStream;
+import java.util.List;
+
+import de.dennisguse.opentracks.content.data.Track;
+import de.dennisguse.opentracks.content.data.TrackPoint;
+import de.dennisguse.opentracks.content.provider.ContentProviderUtils;
+import de.dennisguse.opentracks.util.StringUtils;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertNotNull;
+
+/**
+ * Imports a legacy kml file with a statistics marker at the beginning
+ */
+@RunWith(JUnit4.class)
+public class LegacyKmlImportTest {
+
+    private final Context context = ApplicationProvider.getApplicationContext();
+    private final ContentProviderUtils contentProviderUtils = new ContentProviderUtils(context);
+
+    private Track.Id importTrackId;
+
+    @After
+    public void tearDown() {
+        if (importTrackId != null) {
+            contentProviderUtils.deleteTrack(context, importTrackId);
+        }
+    }
+
+    @LargeTest
+    @Test
+    public void kml_legacy_track_import() {
+        // given
+        KmlFileTrackImporter trackImporter = new KmlFileTrackImporter(context);
+        InputStream inputStream  = InstrumentationRegistry.getInstrumentation().getContext().getResources().openRawResource(de.dennisguse.opentracks.debug.test.R.raw.legacy_track);
+
+        // when
+        // 1. import
+        importTrackId = trackImporter.importFile(inputStream);
+
+        // then
+        // 1. track
+        Track importedTrack = contentProviderUtils.getTrack(importTrackId);
+        assertNotNull(importedTrack);
+        assertEquals("unknown", importedTrack.getCategory());
+        assertEquals("Test Track", importedTrack.getDescription());
+        assertEquals("2020-11-28 18:06", importedTrack.getName());
+        assertEquals("UNKNOWN", importedTrack.getIcon());
+
+        // 2. markers
+        assertEquals(0, contentProviderUtils.getMarkerCount(importTrackId));
+
+        // 3. trackpoints
+        List<TrackPoint> importedTrackPoints = contentProviderUtils.getTrackPoints(importTrackId);
+        assertEquals(8, importedTrackPoints.size()); // 6 trackpoints + pause and resume
+
+        // first 3 trackpoints
+        assertTrackpoint(importedTrackPoints.get(0), "2020-11-28T17:06:22.401Z", 1.234156, 12.340097, 469.286376953125);
+        assertTrackpoint(importedTrackPoints.get(1), "2020-11-28T17:06:25.448Z", 1.23415, 12.340036, 439.1626281738281);
+        assertTrackpoint(importedTrackPoints.get(2), "2020-11-28T17:06:47.888Z", 1.23405, 12.340057, 421.8070983886719);
+
+        // created pause trackpoint with time of previous valid trackpoint
+        assertTrackpoint(importedTrackPoints.get(3), "2020-11-28T17:06:47.888Z", 0.0, 100, 0.0);
+        // created resume trackpoint with time of next valid trackpoint
+        assertTrackpoint(importedTrackPoints.get(4), "2020-11-28T17:06:55.861Z", 0.0, 200, 0.0);
+
+        // last 3 trackpoints
+        assertTrackpoint(importedTrackPoints.get(5), "2020-11-28T17:06:55.861Z", 1.23405, 12.340057, 419.93902587890625);
+        assertTrackpoint(importedTrackPoints.get(6), "2020-11-28T17:06:56.905Z", 1.23405, 12.340057, 419.9036560058594);
+        assertTrackpoint(importedTrackPoints.get(7), "2020-11-28T17:07:20.870Z", 1.234046, 12.340082, 417.99432373046875);
+    }
+
+    private void assertTrackpoint(final TrackPoint trackPoint, final String when, final double longitude, final double latitude, final double altitude) {
+        assertEquals(StringUtils.parseTime(when), trackPoint.getTime());
+        assertEquals(latitude, trackPoint.getLatitude(), 0.001d);
+        assertEquals(longitude, trackPoint.getLongitude(), 0.001d);
+        assertEquals(altitude, trackPoint.getAltitude(), 0.001d);
+    }
+
+}

src/androidTest/java/de/dennisguse/opentracks/services/TrackRecordingServiceTest.java

@@ -138,7 +138,7 @@ public class TrackRecordingServiceTest {
 
     @MediumTest
     @Test
-    public void testRecording_noTracks() throws Exception {
+    public void testRecording_noTracks() throws TimeoutException {
         // given
         List<Track> tracks = contentProviderUtils.getTracks();
         assertTrue(tracks.isEmpty());
@@ -156,7 +156,7 @@ public class TrackRecordingServiceTest {
 
     @MediumTest
     @Test
-    public void testRecording_oldTracks() throws Exception {
+    public void testRecording_oldTracks() throws TimeoutException {
         // given
         createDummyTrack(trackId, -1L, false);
 
@@ -170,7 +170,7 @@ public class TrackRecordingServiceTest {
 
     @MediumTest
     @Test
-    public void testRecording_serviceRestart_whileRecording() throws Exception {
+    public void testRecording_serviceRestart_whileRecording() throws TimeoutException {
         // given
         createDummyTrack(trackId, -1L, true);
 
@@ -183,7 +183,7 @@ public class TrackRecordingServiceTest {
 
     @MediumTest
     @Test
-    public void testRecording_pauseAndResume() throws Exception {
+    public void testRecording_pauseAndResume() throws TimeoutException, InterruptedException {
         // given
         createDummyTrack(trackId, -1L, true);
         TrackRecordingServiceInterface service = ((TrackRecordingServiceInterface) mServiceRule.bindService(createStartIntent(context)));
@@ -212,7 +212,7 @@ public class TrackRecordingServiceTest {
 
     @MediumTest
     @Test
-    public void testRecording_resumeStoppedTrack() throws Exception {
+    public void testRecording_resumeStoppedTrack() throws TimeoutException, InterruptedException {
         // given
         createDummyTrack(trackId, -1L, true);
         TrackRecordingServiceInterface service = ((TrackRecordingServiceInterface) mServiceRule.bindService(createStartIntent(context)));
@@ -238,7 +238,7 @@ public class TrackRecordingServiceTest {
     @Ignore("Sometimes fails on CI.")
     @MediumTest
     @Test
-    public void testRecording_orphanedRecordingTrack() throws Exception {
+    public void testRecording_orphanedRecordingTrack() throws TimeoutException {
         // given
         TrackRecordingServiceInterface service = ((TrackRecordingServiceInterface) mServiceRule.bindService(createStartIntent(context)));
 
@@ -254,7 +254,7 @@ public class TrackRecordingServiceTest {
 
     @MediumTest
     @Test
-    public void testStartNewTrack_alreadyRecording() throws Exception {
+    public void testStartNewTrack_alreadyRecording() throws TimeoutException {
         // given
         TrackRecordingServiceInterface service = ((TrackRecordingServiceInterface) mServiceRule.bindService(createStartIntent(context)));
         service.startNewTrack();
@@ -274,7 +274,7 @@ public class TrackRecordingServiceTest {
 
     @MediumTest
     @Test
-    public void testEndCurrentTrack_noRecording() throws Exception {
+    public void testEndCurrentTrack_noRecording() throws TimeoutException {
         // given
         TrackRecordingServiceInterface service = ((TrackRecordingServiceInterface) mServiceRule.bindService(createStartIntent(context)));
         assertFalse(service.isRecording());
@@ -290,21 +290,21 @@ public class TrackRecordingServiceTest {
 
     @MediumTest
     @Test
-    public void testInsertWaypointMarker_noRecordingTrack() throws Exception {
+    public void testInsertWaypointMarker_noRecordingTrack() throws TimeoutException {
         // given
         TrackRecordingServiceInterface service = ((TrackRecordingServiceInterface) mServiceRule.bindService(createStartIntent(context)));
         assertFalse(service.isRecording());
 
         // when
-        Marker.Id waypointId = service.insertMarker(null, null, null, null);
+        Marker.Id markerId = service.insertMarker(null, null, null, null);
 
         // then
-        assertNull(waypointId);
+        assertNull(markerId);
     }
 
     @MediumTest
     @Test
-    public void testInsertWaypointMarker_validWaypoint() throws Exception {
+    public void testInsertWaypointMarker_validWaypoint() throws TimeoutException, InterruptedException {
         // given
         TrackRecordingServiceInterface service = ((TrackRecordingServiceInterface) mServiceRule.bindService(createStartIntent(context)));
         service.startNewTrack();
@@ -313,11 +313,11 @@ public class TrackRecordingServiceTest {
         Track.Id trackId = service.getRecordingTrackId();
 
         // when
-        Marker.Id waypointId = service.insertMarker(null, null, null, null);
+        Marker.Id markerId = service.insertMarker(null, null, null, null);
 
         // then
-        assertNotEquals(-1L, waypointId);
-        Marker wpt = contentProviderUtils.getMarker(waypointId);
+        assertNotEquals(-1L, markerId);
+        Marker wpt = contentProviderUtils.getMarker(markerId);
         assertEquals(context.getString(R.string.marker_icon_url), wpt.getIcon());
         assertEquals(context.getString(R.string.marker_name_format, 1), wpt.getName());
         assertEquals(trackId, wpt.getTrackId());

src/androidTest/java/de/dennisguse/opentracks/services/sensors/ElevationSumManagerTest.java

@@ -9,7 +9,7 @@ import org.junit.Test;
  */
 public class ElevationSumManagerTest {
 
-    private ElevationSumManager elevationSumManager = new ElevationSumManager();
+    private final ElevationSumManager elevationSumManager = new ElevationSumManager();
 
     private static void addSensorValue(ElevationSumManager elevationSumManager, float[] values) {
         for (float f : values) {
@@ -32,7 +32,7 @@ public class ElevationSumManagerTest {
 
         // then
         Assert.assertEquals(0f, elevationSumManager.getElevationGain_m(), 0.01);
-        Assert.assertEquals(-48.0, elevationSumManager.getElevationLoss_m(), 0.01);
+        Assert.assertEquals(48.0, elevationSumManager.getElevationLoss_m(), 0.01);
     }
 
     @Test

src/androidTest/java/de/dennisguse/opentracks/util/AnnouncementUtilsTest.java

@@ -50,9 +50,8 @@ public class AnnouncementUtilsTest {
         stats.setMaxSpeed(100);
         stats.setTotalElevationGain(6000);
 
-        IntervalStatistics intervalStatistics = new IntervalStatistics();
         List<TrackPoint> trackPoints = Arrays.asList(TestDataUtil.createTrack(new Track.Id(System.currentTimeMillis()), 10).second);
-        intervalStatistics.build(trackPoints, 1000);
+        IntervalStatistics intervalStatistics = new IntervalStatistics(trackPoints, 1000);
         IntervalStatistics.Interval lastInterval = intervalStatistics.getIntervalList().get(intervalStatistics.getIntervalList().size() - 1);
 
         int speedId = R.plurals.voiceSpeedKilometersPerHour;

src/androidTest/java/de/dennisguse/opentracks/util/PressureSensorUtilsTest.java

@@ -43,7 +43,7 @@ public class PressureSensorUtilsTest {
 
         // then
         assertEquals(0f, elevationGain_m, 0.01);
-        assertEquals(-15.0f, elevationLoss_m, 0.01);
+        assertEquals(15.0f, elevationLoss_m, 0.01);
         assertEquals(1016.80f, lastUsedPressureValue_hPa, 0.01); //Expect exponential smoothing
     }
 }

src/androidTest/java/de/dennisguse/opentracks/util/StringUtilsTest.java

@@ -226,4 +226,13 @@ public class StringUtilsTest {
         assertEquals("min/km", StringUtils.getSpeedParts(context, 0, true, false).second);
         assertEquals("min/mi", StringUtils.getSpeedParts(context, 0, false, false).second);
     }
+
+    @Test
+    public void testFormatSpeed() {
+        assertEquals("4:59 min/km", StringUtils.formatSpeed(context, 3.34, true, false));
+        assertEquals("8:02 min/mi", StringUtils.formatSpeed(context, 3.34, false, false));
+
+        assertEquals("12.02 km/h", StringUtils.formatSpeed(context, 3.34, true, true));
+        assertEquals("7.47 mph", StringUtils.formatSpeed(context, 3.34, false, true));
+    }
 }

src/androidTest/java/de/dennisguse/opentracks/viewmodels/AggregatedStatisticsTest.java

@@ -8,6 +8,8 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
 
+import java.util.List;
+
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.content.data.Track;
 import de.dennisguse.opentracks.stats.TrackStatistics;
@@ -57,8 +59,7 @@ public class AggregatedStatisticsTest {
         Track track = createTrack(context, totalDistance, totalTime, biking);
 
         // when
-        AggregatedStatistics aggregatedStatistics = new AggregatedStatistics();
-        aggregatedStatistics.aggregate(track);
+        AggregatedStatistics aggregatedStatistics = new AggregatedStatistics(List.of(track));
 
         // then
         assertEquals(1, aggregatedStatistics.getCount());
@@ -80,8 +81,7 @@ public class AggregatedStatisticsTest {
         Track track = createTrack(context, totalDistance, totalTime, mountainBiking);
 
         // when
-        AggregatedStatistics aggregatedStatistics = new AggregatedStatistics();
-        aggregatedStatistics.aggregate(track);
+        AggregatedStatistics aggregatedStatistics = new AggregatedStatistics(List.of(track));
 
         // then
         assertNotNull(aggregatedStatistics.get(mountainBiking));
@@ -97,8 +97,7 @@ public class AggregatedStatisticsTest {
         Track track = createTrack(context, totalDistance, totalTime, trailRunning);
 
         // when
-        AggregatedStatistics aggregatedStatistics = new AggregatedStatistics();
-        aggregatedStatistics.aggregate(track);
+        AggregatedStatistics aggregatedStatistics = new AggregatedStatistics(List.of(track));
 
         // then
         assertNotNull(aggregatedStatistics.get(trailRunning));
@@ -111,15 +110,10 @@ public class AggregatedStatisticsTest {
         long totalDistance = 10000;
         long totalTime = 2400000;
         String biking = context.getString(R.string.activity_type_biking);
-        Track[] tracks = new Track[2];
-        for (int i = 0; i < 2; i++) {
-            tracks[i] = createTrack(context, totalDistance, totalTime, biking);
-        }
+        List<Track> tracks = List.of(createTrack(context, totalDistance, totalTime, biking), createTrack(context, totalDistance, totalTime, biking));
 
         // when
-        AggregatedStatistics aggregatedStatistics = new AggregatedStatistics();
-        aggregatedStatistics.aggregate(tracks[0]); // biking activity 1.
-        aggregatedStatistics.aggregate(tracks[1]); // biking activity 2.
+        AggregatedStatistics aggregatedStatistics = new AggregatedStatistics(tracks);
 
         // then
         assertEquals(1, aggregatedStatistics.getCount());
@@ -141,17 +135,14 @@ public class AggregatedStatisticsTest {
         String running = context.getString(R.string.activity_type_running);
         String walking = context.getString(R.string.activity_type_walking);
         long totalTime = 2400000;
-        Track[] tracks = new Track[]{
+        List<Track> tracks = List.of(
                 createTrack(context, totalDistance, totalTime, biking),
                 createTrack(context, totalDistance, totalTime, running),
                 createTrack(context, totalDistance, totalTime, walking)
-        };
+        );
 
         // when
-        AggregatedStatistics aggregatedStatistics = new AggregatedStatistics();
-        aggregatedStatistics.aggregate(tracks[0]); // biking activity 1.
-        aggregatedStatistics.aggregate(tracks[1]); // biking activity 2.
-        aggregatedStatistics.aggregate(tracks[2]); // biking activity 3.
+        AggregatedStatistics aggregatedStatistics = new AggregatedStatistics(tracks);
 
         // then
         assertEquals(3, aggregatedStatistics.getCount());
@@ -191,7 +182,7 @@ public class AggregatedStatisticsTest {
         String running = context.getString(R.string.activity_type_running);
         String walking = context.getString(R.string.activity_type_walking);
         String driving = context.getString(R.string.activity_type_driving);
-        Track[] tracks = new Track[]{
+        List<Track> tracks = List.of(
                 createTrack(context, totalDistance, totalTime, biking),
                 createTrack(context, totalDistance, totalTime, running),
                 createTrack(context, totalDistance, totalTime, walking),
@@ -201,16 +192,12 @@ public class AggregatedStatisticsTest {
                 createTrack(context, totalDistance, totalTime, biking),
                 createTrack(context, totalDistance, totalTime, biking),
                 createTrack(context, totalDistance, totalTime, biking),
-                createTrack(context, totalDistance, totalTime, driving),
-        };
+                createTrack(context, totalDistance, totalTime, driving)
+        );
 
 
         // when
-        AggregatedStatistics aggregatedStatistics = new AggregatedStatistics();
-        for (Track track : tracks) {
-            aggregatedStatistics.aggregate(track);
-
-        }
+        AggregatedStatistics aggregatedStatistics = new AggregatedStatistics(tracks);
 
         // then
         // 4 sports.
@@ -255,5 +242,12 @@ public class AggregatedStatisticsTest {
             assertEquals(totalDistance, statistics2.getTotalDistance(), 0);
             assertEquals(totalTime, statistics2.getMovingTime());
         }
+
+        // Check order
+
+        {
+            assertEquals(biking, aggregatedStatistics.getItem(0).getCategory());
+            assertEquals(driving, aggregatedStatistics.getItem(3).getCategory());
+        }
     }
 }

src/androidTest/java/de/dennisguse/opentracks/viewmodels/IntervalStatisticsTest.java

@@ -47,10 +47,9 @@ public class IntervalStatisticsTest {
 		List<TrackPoint> trackPoints = buildTrackPoints(50);
 		TrackStatistics trackStatistics = buildTrackStatistics(trackPoints);
 		float distanceInterval = 1000f;
-		IntervalStatistics intervalStatistics = new IntervalStatistics();
 
 		// when and then
-		whenAndThen(trackPoints, trackStatistics, distanceInterval, intervalStatistics);
+		whenAndThen(trackPoints, trackStatistics, distanceInterval);
 	}
 
 	/**
@@ -64,10 +63,9 @@ public class IntervalStatisticsTest {
 		List<TrackPoint> trackPoints = buildTrackPoints(200);
 		TrackStatistics trackStatistics = buildTrackStatistics(trackPoints);
 		float distanceInterval = 1000f;
-		IntervalStatistics intervalStatistics = new IntervalStatistics();
 
 		// when and then
-		whenAndThen(trackPoints, trackStatistics, distanceInterval, intervalStatistics);
+		whenAndThen(trackPoints, trackStatistics, distanceInterval);
 	}
 
 	/**
@@ -81,10 +79,9 @@ public class IntervalStatisticsTest {
 		List<TrackPoint> trackPoints = buildTrackPoints(200);
 		TrackStatistics trackStatistics = buildTrackStatistics(trackPoints);
 		float distanceInterval = 3000f;
-		IntervalStatistics intervalStatistics = new IntervalStatistics();
 
 		// when and then
-		whenAndThen(trackPoints, trackStatistics, distanceInterval, intervalStatistics);
+		whenAndThen(trackPoints, trackStatistics, distanceInterval);
 	}
 
 	/**
@@ -98,10 +95,9 @@ public class IntervalStatisticsTest {
 		List<TrackPoint> trackPoints = buildTrackPoints(1000);
 		TrackStatistics trackStatistics = buildTrackStatistics(trackPoints);
 		float distanceInterval = 3000f;
-		IntervalStatistics intervalStatistics = new IntervalStatistics();
 
 		// when and then
-		whenAndThen(trackPoints, trackStatistics, distanceInterval, intervalStatistics);
+		whenAndThen(trackPoints, trackStatistics, distanceInterval);
 	}
 
 	/**
@@ -115,14 +111,13 @@ public class IntervalStatisticsTest {
 		List<TrackPoint> trackPoints = buildTrackPoints(10000);
 		TrackStatistics trackStatistics = buildTrackStatistics(trackPoints);
 		float distanceInterval = 1000f;
-		IntervalStatistics intervalStatistics = new IntervalStatistics();
 
 		// when and then
-		whenAndThen(trackPoints, trackStatistics, distanceInterval, intervalStatistics);
+		whenAndThen(trackPoints, trackStatistics, distanceInterval);
 	}
 
-	private void whenAndThen(List<TrackPoint> trackPoints, TrackStatistics trackStatistics, float distanceInterval, IntervalStatistics intervalStatistics) {
-		intervalStatistics.build(trackPoints, distanceInterval);
+	private void whenAndThen(List<TrackPoint> trackPoints, TrackStatistics trackStatistics, float distanceInterval) {
+		IntervalStatistics intervalStatistics = new IntervalStatistics(trackPoints, distanceInterval);
 		List<IntervalStatistics.Interval> intervalList = intervalStatistics.getIntervalList();
 		double totalDistance = 0d;
 		long totalTime = 0L;

src/androidTest/res/raw/legacy_track.kml

@@ -0,0 +1,173 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<kml xmlns="http://www.opengis.net/kml/2.2"
+xmlns:gx="http://www.google.com/kml/ext/2.2"
+xmlns:atom="http://www.w3.org/2005/Atom"
+xmlns:opentracks="http://opentracksapp.com/xmlschemas/v1">
+<Document>
+<open>1</open>
+<visibility>1</visibility>
+<name><![CDATA[2020-11-28 18:06]]></name>
+<atom:generator><![CDATA[OpenTracks (Debug)]]></atom:generator>
+<Style id="track">
+<LineStyle><color>7f0000ff</color><width>4</width></LineStyle>
+<IconStyle>
+<scale>1.3</scale>
+<Icon><href>http://earth.google.com/images/kml-icons/track-directional/track-0.png</href></Icon>
+</IconStyle>
+</Style>
+<Style id="start"><IconStyle>
+<scale>1.3</scale>
+<Icon><href>http://maps.google.com/mapfiles/kml/paddle/grn-circle.png</href></Icon>
+<hotSpot x="32" y="1" xunits="pixels" yunits="pixels"/>
+</IconStyle></Style>
+<Style id="end"><IconStyle>
+<scale>1.3</scale>
+<Icon><href>http://maps.google.com/mapfiles/kml/paddle/red-circle.png</href></Icon>
+<hotSpot x="32" y="1" xunits="pixels" yunits="pixels"/>
+</IconStyle></Style>
+<Style id="waypoint"><IconStyle>
+<scale>1.3</scale>
+<Icon><href>http://maps.google.com/mapfiles/kml/pushpin/blue-pushpin.png</href></Icon>
+<hotSpot x="20" y="2" xunits="pixels" yunits="pixels"/>
+</IconStyle></Style>
+<Schema id="schema">
+<gx:SimpleArrayField name="speed" type="float">
+<displayName><![CDATA[Speed (m/s)]]></displayName>
+</gx:SimpleArrayField>
+<gx:SimpleArrayField name="power" type="float">
+<displayName><![CDATA[Power (W)]]></displayName>
+</gx:SimpleArrayField>
+<gx:SimpleArrayField name="cadence" type="float">
+<displayName><![CDATA[Cadence (rpm)]]></displayName>
+</gx:SimpleArrayField>
+<gx:SimpleArrayField name="heart_rate" type="float">
+<displayName><![CDATA[Heart rate (bpm)]]></displayName>
+</gx:SimpleArrayField>
+</Schema>
+<Folder>
+<name><![CDATA[Sun, 28 Nov 2020 18:06 Markers]]></name>
+<open>1</open>
+<Placemark>
+<name><![CDATA[Split 0]]></name>
+<description><![CDATA[Total distance: 0.00 km (0.0 mi)
+Total time: 00:00
+Moving time: 00:00
+Average speed: 0.00 km/h (0.0 mi/h)
+Average moving speed: 0.00 km/h (0.0 mi/h)
+Max speed: 0.00 km/h (0.0 mi/h)
+Average pace: 0:00 min/km (0:00 min/mi)
+Average moving pace: 0:00 min/km (0:00 min/mi)
+Fastest pace: 0:00 min/km (0:00 min/mi)
+Max elevation: -9223372036854775808 m (-9223372036854775808 ft)
+Min elevation: 9223372036854775807 m (9223372036854775807 ft)
+Elevation gain: 0 m (0 ft)
+Max grade: 0 %
+Min grade: 0 %
+Recorded: 6/23 11:29
+]]></description>
+<TimeStamp><when>1970-01-01T00:00:00Z</when></TimeStamp>
+<styleUrl>#waypoint</styleUrl>
+<Point>
+<coordinates>180.0,100.0</coordinates>
+</Point>
+</Placemark>
+</Folder>
+<Placemark>
+<name><![CDATA[2020-11-28 18:06 (Start)]]></name>
+<description><![CDATA[]]></description>
+<TimeStamp><when>2020-11-28T17:06:22.401Z</when></TimeStamp>
+<styleUrl>#start</styleUrl>
+<Point>
+<coordinates>1.234156,12.340097,469.286376953125</coordinates>
+</Point>
+</Placemark>
+<Placemark>
+<name><![CDATA[2020-11-28 18:06]]></name>
+<description><![CDATA[Test Track]]></description>
+<icon><![CDATA[UNKNOWN]]></icon>
+<opentracks:trackid>2f170875-55d7-445d-b2b8-22a573c81dbc</opentracks:trackid>
+<styleUrl>#track</styleUrl>
+<ExtendedData>
+<Data name="type"><value><![CDATA[unknown]]></value></Data>
+</ExtendedData>
+<gx:MultiTrack>
+<altitudeMode>absolute</altitudeMode>
+<gx:interpolate>1</gx:interpolate>
+<gx:Track>
+<when>2020-11-28T17:06:22.401Z</when>
+<gx:coord>1.234156 12.340097 469.286376953125</gx:coord>
+<when>2020-11-28T17:06:25.448Z</when>
+<gx:coord>1.23415 12.340036 439.1626281738281</gx:coord>
+<when>2020-11-28T17:06:47.888Z</when>
+<gx:coord>1.23405 12.340057 421.8070983886719</gx:coord>
+<ExtendedData>
+<SchemaData schemaUrl="#schema">
+<gx:SimpleArrayData name="speed">
+<gx:value>0.5391469</gx:value>
+<gx:value>0.15777911</gx:value>
+<gx:value>0.0</gx:value>
+</gx:SimpleArrayData>
+<gx:SimpleArrayData name="elevation_gain">
+<gx:value>0.0</gx:value>
+<gx:value>0.0</gx:value>
+<gx:value>0.0</gx:value>
+</gx:SimpleArrayData>
+</SchemaData>
+</ExtendedData>
+</gx:Track>
+<gx:Track>
+<when>2020-11-28T17:06:55.861Z</when>
+<gx:coord>1.23405 12.340057 419.93902587890625</gx:coord>
+<when>2020-11-28T17:06:56.905Z</when>
+<gx:coord>1.23405 12.340057 419.9036560058594</gx:coord>
+<when>2020-11-28T17:07:20.870Z</when>
+<gx:coord>1.234046 12.340082 417.99432373046875</gx:coord>
+<ExtendedData>
+<SchemaData schemaUrl="#schema">
+<gx:SimpleArrayData name="speed">
+<gx:value>0.0</gx:value>
+<gx:value>0.0</gx:value>
+<gx:value>0.0</gx:value>
+</gx:SimpleArrayData>
+<gx:SimpleArrayData name="elevation_gain">
+<gx:value>0.0</gx:value>
+<gx:value>0.0</gx:value>
+<gx:value>0.0</gx:value>
+<gx:value>0.0</gx:value>
+<gx:value>0.0</gx:value>
+<gx:value>0.0</gx:value>
+</gx:SimpleArrayData>
+</SchemaData>
+</ExtendedData>
+</gx:Track>
+</gx:MultiTrack>
+</Placemark>
+<Placemark>
+<name><![CDATA[2020-11-28 18:06 (End)]]></name>
+<description><![CDATA[OpenTracks (Debug)
+
+Name: 2020-11-28 18:06
+Activity type: unknown
+Description: -
+Total distance: 0.01 km (0.0 mi)
+Total time: 01:04
+Moving time: 00:00
+Average speed: 0.49 km/h (0.3 mi/h)
+Average moving speed: 0.00 km/h (0.0 mi/h)
+Max speed: 0.00 km/h (0.0 mi/h)
+Average pace: 122:30 min/km (197:08 min/mi)
+Average moving pace: 0:00 min/km (0:00 min/mi)
+Fastest pace: 0:00 min/km (0:00 min/mi)
+Max elevation: 469 m (1540 ft)
+Min elevation: 419 m (1376 ft)
+Elevation gain: 0 m (0 ft)
+Recorded: 11/28 18:06
+]]></description>
+<TimeStamp><when>2020-11-28T17:07:20.870Z</when></TimeStamp>
+<styleUrl>#end</styleUrl>
+<Point>
+<coordinates>1.234046,12.340082,417.99432373046875</coordinates>
+</Point>
+</Placemark>
+</Document>
+</kml>

src/main/AndroidManifest.xml

@@ -50,10 +50,11 @@ limitations under the License.
     <application
         android:name=".Startup"
         android:allowBackup="false"
-        android:hasFragileUserData="true"
         android:hardwareAccelerated="true"
+        android:hasFragileUserData="true"
         android:icon="@mipmap/ic_launcher"
         android:label="@string/app_name"
+        android:supportsRtl="true"
         android:theme="@style/ThemeCustom">
 
         <activity android:name=".AboutActivity" />
@@ -71,14 +72,14 @@ limitations under the License.
         <activity android:name=".io.file.importer.ImportActivity">
 
             <intent-filter>
-                <action android:name="android.intent.action.SEND"/>
-                <category android:name="android.intent.category.DEFAULT"/>
-                <data android:mimeType="application/gpx+xml"/>
+                <action android:name="android.intent.action.SEND" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:mimeType="application/gpx+xml" />
             </intent-filter>
             <intent-filter>
-                <action android:name="android.intent.action.SEND"/>
-                <category android:name="android.intent.category.DEFAULT"/>
-                <data android:mimeType="application/gpx"/>
+                <action android:name="android.intent.action.SEND" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:mimeType="application/gpx" />
             </intent-filter>
 
             <intent-filter
@@ -86,13 +87,15 @@ limitations under the License.
                 android:priority="50">
                 <action android:name="android.intent.action.VIEW" />
                 <action android:name="android.intent.action.SEND" />
+
                 <category android:name="android.intent.category.DEFAULT" />
                 <category android:name="android.intent.category.BROWSABLE" />
-                <data android:scheme="file"/>
-                <data android:scheme="content"/>
-                <data android:scheme="data"/>
-                <data android:host="*"/>
-                <data android:mimeType="*/*"/>
+
+                <data android:scheme="file" />
+                <data android:scheme="content" />
+                <data android:scheme="data" />
+                <data android:host="*" />
+                <data android:mimeType="*/*" />
                 <data android:pathPattern=".*\\.gpx" />
                 <data android:pathPattern=".*\\..*\\.gpx" />
                 <data android:pathPattern=".*\\..*\\..*\\.gpx" />
@@ -110,12 +113,14 @@ limitations under the License.
                 android:priority="50">
                 <action android:name="android.intent.action.VIEW" />
                 <action android:name="android.intent.action.SEND" />
+
                 <category android:name="android.intent.category.DEFAULT" />
                 <category android:name="android.intent.category.BROWSABLE" />
-                <data android:scheme="file"/>
-                <data android:scheme="content"/>
-                <data android:scheme="data"/>
-                <data android:host="*"/>
+
+                <data android:scheme="file" />
+                <data android:scheme="content" />
+                <data android:scheme="data" />
+                <data android:host="*" />
                 <data android:pathPattern=".*\\.gpx" />
                 <data android:pathPattern=".*\\..*\\.gpx" />
                 <data android:pathPattern=".*\\..*\\..*\\.gpx" />
@@ -129,9 +134,9 @@ limitations under the License.
             </intent-filter>
 
             <intent-filter>
-                <action android:name="android.intent.action.SEND"/>
-                <category android:name="android.intent.category.DEFAULT"/>
-                <data android:mimeType="application/vnd.google-earth.kmz"/>
+                <action android:name="android.intent.action.SEND" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:mimeType="application/vnd.google-earth.kmz" />
             </intent-filter>
 
             <intent-filter
@@ -139,13 +144,15 @@ limitations under the License.
                 android:priority="50">
                 <action android:name="android.intent.action.VIEW" />
                 <action android:name="android.intent.action.SEND" />
+
                 <category android:name="android.intent.category.DEFAULT" />
                 <category android:name="android.intent.category.BROWSABLE" />
-                <data android:scheme="file"/>
-                <data android:scheme="content"/>
-                <data android:scheme="data"/>
-                <data android:host="*"/>
-                <data android:mimeType="*/*"/>
+
+                <data android:scheme="file" />
+                <data android:scheme="content" />
+                <data android:scheme="data" />
+                <data android:host="*" />
+                <data android:mimeType="*/*" />
                 <data android:pathPattern=".*\\.kmz" />
                 <data android:pathPattern=".*\\..*\\.kmz" />
                 <data android:pathPattern=".*\\..*\\..*\\.kmz" />
@@ -163,12 +170,14 @@ limitations under the License.
                 android:priority="50">
                 <action android:name="android.intent.action.VIEW" />
                 <action android:name="android.intent.action.SEND" />
+
                 <category android:name="android.intent.category.DEFAULT" />
                 <category android:name="android.intent.category.BROWSABLE" />
-                <data android:scheme="file"/>
-                <data android:scheme="content"/>
-                <data android:scheme="data"/>
-                <data android:host="*"/>
+
+                <data android:scheme="file" />
+                <data android:scheme="content" />
+                <data android:scheme="data" />
+                <data android:host="*" />
                 <data android:pathPattern=".*\\.kmz" />
                 <data android:pathPattern=".*\\..*\\.kmz" />
                 <data android:pathPattern=".*\\..*\\..*\\.kmz" />
@@ -182,9 +191,9 @@ limitations under the License.
             </intent-filter>
 
             <intent-filter>
-                <action android:name="android.intent.action.SEND"/>
-                <category android:name="android.intent.category.DEFAULT"/>
-                <data android:mimeType="application/vnd.google-earth.kml+xml"/>
+                <action android:name="android.intent.action.SEND" />
+                <category android:name="android.intent.category.DEFAULT" />
+                <data android:mimeType="application/vnd.google-earth.kml+xml" />
             </intent-filter>
 
             <intent-filter
@@ -192,13 +201,15 @@ limitations under the License.
                 android:priority="50">
                 <action android:name="android.intent.action.VIEW" />
                 <action android:name="android.intent.action.SEND" />
+
                 <category android:name="android.intent.category.DEFAULT" />
                 <category android:name="android.intent.category.BROWSABLE" />
-                <data android:scheme="file"/>
-                <data android:scheme="content"/>
-                <data android:scheme="data"/>
-                <data android:host="*"/>
-                <data android:mimeType="*/*"/>
+
+                <data android:scheme="file" />
+                <data android:scheme="content" />
+                <data android:scheme="data" />
+                <data android:host="*" />
+                <data android:mimeType="*/*" />
                 <data android:pathPattern=".*\\.kml" />
                 <data android:pathPattern=".*\\..*\\.kml" />
                 <data android:pathPattern=".*\\..*\\..*\\.kml" />
@@ -216,12 +227,14 @@ limitations under the License.
                 android:priority="50">
                 <action android:name="android.intent.action.VIEW" />
                 <action android:name="android.intent.action.SEND" />
+
                 <category android:name="android.intent.category.DEFAULT" />
                 <category android:name="android.intent.category.BROWSABLE" />
-                <data android:scheme="file"/>
-                <data android:scheme="content"/>
-                <data android:scheme="data"/>
-                <data android:host="*"/>
+
+                <data android:scheme="file" />
+                <data android:scheme="content" />
+                <data android:scheme="data" />
+                <data android:host="*" />
                 <data android:pathPattern=".*\\.kml" />
                 <data android:pathPattern=".*\\..*\\.kml" />
                 <data android:pathPattern=".*\\..*\\..*\\.kml" />
@@ -237,7 +250,7 @@ limitations under the License.
 
         <activity android:name=".MarkerDetailActivity">
             <intent-filter>
-                <action android:name="de.dennisguse.opentracks.MarkerDetails"/>
+                <action android:name="de.dennisguse.opentracks.MarkerDetails" />
                 <category android:name="android.intent.category.DEFAULT" />
             </intent-filter>
         </activity>
@@ -258,8 +271,8 @@ limitations under the License.
 
         <activity
             android:name=".TrackListActivity"
-            android:theme="@style/SplashTheme"
-            android:launchMode="singleTop">
+            android:launchMode="singleTop"
+            android:theme="@style/SplashTheme">
             <intent-filter>
                 <action android:name="android.intent.action.MAIN" />
                 <category android:name="android.intent.category.LAUNCHER" />

src/main/java/de/dennisguse/opentracks/AbstractActivity.java

@@ -19,6 +19,7 @@ package de.dennisguse.opentracks;
 import android.os.Bundle;
 import android.view.View;
 
+import androidx.annotation.Nullable;
 import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
 
@@ -39,8 +40,22 @@ public abstract class AbstractActivity extends AppCompatActivity {
         setContentView(getRootView());
 
         Toolbar toolbar = findViewById(R.id.toolbar);
-        setSupportActionBar(toolbar);
+        setupActionBarBack(toolbar);
+    }
+
+    @Override
+    public boolean onSupportNavigateUp() {
+        onBackPressed();
+        return true;
     }
 
     protected abstract View getRootView();
+
+    protected void setupActionBarBack(@Nullable Toolbar toolbar) {
+        setSupportActionBar(toolbar);
+        if (toolbar != null) {
+            getSupportActionBar().setDisplayHomeAsUpEnabled(true);
+            getSupportActionBar().setDisplayShowHomeEnabled(true);
+        }
+    }
 }

src/main/java/de/dennisguse/opentracks/MarkerEditActivity.java

@@ -33,20 +33,16 @@ import android.widget.ArrayAdapter;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
+import androidx.lifecycle.ViewModelProvider;
 
-import java.io.File;
 import java.io.FileDescriptor;
 import java.io.IOException;
-import java.util.ArrayList;
-import java.util.List;
 
 import de.dennisguse.opentracks.content.data.Marker;
 import de.dennisguse.opentracks.content.data.Track;
-import de.dennisguse.opentracks.content.provider.ContentProviderUtils;
 import de.dennisguse.opentracks.databinding.MarkerEditBinding;
-import de.dennisguse.opentracks.services.TrackRecordingServiceConnection;
-import de.dennisguse.opentracks.util.FileUtils;
 import de.dennisguse.opentracks.util.IntentUtils;
+import de.dennisguse.opentracks.viewmodels.MarkerEditViewModel;
 
 /**
  * An activity to add/edit a marker.
@@ -58,25 +54,20 @@ public class MarkerEditActivity extends AbstractActivity {
     public static final String EXTRA_TRACK_ID = "track_id";
     public static final String EXTRA_MARKER_ID = "marker_id";
 
-    private static final String BUNDLE_PHOTO_URI = "photo_uri";
-
     private static final int CAMERA_REQUEST_CODE = 5;
     private static final int GALLERY_IMG_REQUEST_CODE = 7;
 
     private static final String TAG = MarkerEditActivity.class.getSimpleName();
     private Track.Id trackId;
-    private final TrackRecordingServiceConnection trackRecordingServiceConnection = new TrackRecordingServiceConnection();
     private Marker marker;
 
     private MenuItem insertPhotoMenuItem;
     private MenuItem insertGalleryImgMenuItem;
 
-    private Uri photoUri;
-    private Uri photoUriOriginal;
-    private List<Uri> photoUriDeleteList = new ArrayList<>();
     private boolean hasCamera;
+    private Uri cameraPhotoUri;
 
-    private boolean isNewMarker;
+    private MarkerEditViewModel viewModel;
 
     // UI elements
     private MarkerEditBinding viewBinding;
@@ -94,117 +85,40 @@ public class MarkerEditActivity extends AbstractActivity {
         ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(this, R.array.marker_types, android.R.layout.simple_dropdown_item_1line);
         viewBinding.markerEditMarkerType.setAdapter(adapter);
         viewBinding.markerEditPhotoDelete.setOnClickListener(v -> {
-            if (marker != null && marker.hasPhoto()) {
-                marker.setPhotoUrl(null);
-            }
-            viewBinding.markerEditPhoto.setImageBitmap(null);
-            photoUriDeleteList.add(photoUri);
-            photoUriOriginal = photoUriOriginal == null ? photoUri : photoUriOriginal;
-            photoUri = null;
-            hideAndShowOptions();
+            viewModel.onPhotoDelete(viewBinding.markerEditName.getText().toString(),
+                    viewBinding.markerEditMarkerType.getText().toString(),
+                    viewBinding.markerEditDescription.getText().toString());
         });
 
         viewBinding.markerEditCancel.setOnClickListener(v -> {
-            Track.Id trackId = getTrackId();
-            if (isNewMarker && trackId != null) {
-                // new marker and user cancel -> delete all photos from track directory
-                for (Uri photoUriDelete : photoUriDeleteList) {
-                    File photoFile = FileUtils.getPhotoFileIfExists(this, trackId, photoUriDelete);
-                    FileUtils.deleteDirectoryRecurse(photoFile);
-                }
-                if (photoUri != null) {
-                    File photoFile = FileUtils.getPhotoFileIfExists(this, trackId, photoUri);
-                    FileUtils.deleteDirectoryRecurse(photoFile);
-                }
-            } else if (!isNewMarker && trackId != null) {
-                // no new marker, user cancel and photo was changed -> delete all photos but original one
-                for (Uri photoUri : photoUriDeleteList) {
-                    if (photoUriOriginal != photoUri) {
-                        File photoFile = FileUtils.getPhotoFileIfExists(this, trackId, photoUri);
-                        FileUtils.deleteDirectoryRecurse(photoFile);
-                    }
-                }
-                if (photoUri != null && photoUri != photoUriOriginal) {
-                    File photoFile = FileUtils.getPhotoFileIfExists(this, trackId, photoUri);
-                    FileUtils.deleteDirectoryRecurse(photoFile);
-                }
-            }
+            viewModel.onCancel();
             finish();
         });
 
-        isNewMarker = markerId == null;
-
+        boolean isNewMarker = markerId == null;
         setTitle(isNewMarker ? R.string.menu_insert_marker : R.string.menu_edit);
         viewBinding.markerEditDone.setText(isNewMarker ? R.string.generic_add : R.string.generic_save);
         viewBinding.markerEditDone.setOnClickListener(v -> {
-            if (isNewMarker) {
-                addMarker();
-            } else {
-                saveMarker();
-            }
-            Track.Id trackId = getTrackId();
-            if (trackId == null) {
-                for (Uri photoUri : photoUriDeleteList) {
-                    File photoFile = FileUtils.getPhotoFileIfExists(this, trackId, photoUri);
-                    FileUtils.deleteDirectoryRecurse(photoFile);
-                }
-            }
+            viewModel.onDone(viewBinding.markerEditName.getText().toString(),
+                        viewBinding.markerEditMarkerType.getText().toString(),
+                        viewBinding.markerEditDescription.getText().toString());
             finish();
         });
 
-        if (isNewMarker) {
-            int nextMarkerNumber = trackId == null ? -1 : new ContentProviderUtils(this).getNextMarkerNumber(trackId);
-            if (nextMarkerNumber == -1) {
-                nextMarkerNumber = 0;
-            }
-            viewBinding.markerEditName.setText(getString(R.string.marker_name_format, nextMarkerNumber));
-            viewBinding.markerEditName.selectAll();
-            viewBinding.markerEditMarkerType.setText("");
-            viewBinding.markerEditDescription.setText("");
-        } else {
-            marker = new ContentProviderUtils(this).getMarker(markerId);
-            if (marker == null) {
-                Log.d(TAG, "marker is null");
-                finish();
-                return;
-            }
+        viewModel = new ViewModelProvider(this).get(MarkerEditViewModel.class);
+        viewModel.getMarkerData(trackId, markerId).observe(this, data -> {
+            marker = data;
             viewBinding.markerEditName.setText(marker.getName());
             viewBinding.markerEditMarkerType.setText(marker.getCategory());
             viewBinding.markerEditDescription.setText(marker.getDescription());
             if (marker.hasPhoto()) {
-                photoUri = marker.getPhotoURI();
+                setMarkerImageView(marker.getPhotoURI());
+            } else {
+                viewBinding.markerEditPhoto.setImageDrawable(null);
             }
-        }
 
-        if (savedInstanceState != null) {
-            photoUri = savedInstanceState.getParcelable(BUNDLE_PHOTO_URI);
-            if (marker != null) {
-                marker.setPhotoUrl(photoUri != null ? photoUri.toString() : null);
-            }
-        }
-        if (photoUri != null) {
-            setMarkerImageView(photoUri);
-        }
-
-        hideAndShowOptions();
-    }
-
-    @Override
-    protected void onStart() {
-        super.onStart();
-        trackRecordingServiceConnection.startConnection(this);
-    }
-
-    @Override
-    protected void onSaveInstanceState(@NonNull Bundle outState) {
-        super.onSaveInstanceState(outState);
-        outState.putParcelable(BUNDLE_PHOTO_URI, photoUri);
-    }
-
-    @Override
-    protected void onStop() {
-        super.onStop();
-        trackRecordingServiceConnection.unbind(this);
+            hideAndShowOptions();
+        });
     }
 
     @Override
@@ -227,16 +141,17 @@ public class MarkerEditActivity extends AbstractActivity {
 
     @Override
     public boolean onOptionsItemSelected(@NonNull MenuItem item) {
-        switch (item.getItemId()) {
-            case R.id.marker_edit_insert_photo:
-                createMarkerWithPicture();
-                return true;
-            case R.id.marker_edit_insert_gallery_img:
-                createMarkerWithGalleryImage();
-                return true;
-            default:
-                return super.onOptionsItemSelected(item);
+        if (item.getItemId() == R.id.marker_edit_insert_photo) {
+            createMarkerWithPicture();
+            return true;
         }
+
+        if (item.getItemId() == R.id.marker_edit_insert_gallery_img) {
+            createMarkerWithGalleryImage();
+            return true;
+        }
+
+        return super.onOptionsItemSelected(item);
     }
 
     @Override
@@ -246,26 +161,20 @@ public class MarkerEditActivity extends AbstractActivity {
                 Toast.makeText(this, R.string.marker_add_photo_canceled, Toast.LENGTH_LONG).show();
                 return;
             } else if (resultCode == RESULT_OK) {
-                setMarkerImageView(photoUri);
+                viewModel.onNewCameraPhoto(cameraPhotoUri,
+                        viewBinding.markerEditName.getText().toString(),
+                        viewBinding.markerEditMarkerType.getText().toString(),
+                        viewBinding.markerEditDescription.getText().toString());
             }
         } else if (requestCode == GALLERY_IMG_REQUEST_CODE) {
             if (resultCode == RESULT_CANCELED) {
                 Toast.makeText(this, R.string.marker_add_photo_canceled, Toast.LENGTH_LONG).show();
                 return;
-            } else if (resultCode == RESULT_OK)  {
-                Uri srcUri = data.getData();
-                try (ParcelFileDescriptor parcelFd = getContentResolver().openFileDescriptor(srcUri, "r")) {
-                    FileDescriptor srcFd = parcelFd.getFileDescriptor();
-                    File dstFile = new File(FileUtils.getImageUrl(this, getTrackId()));
-                    FileUtils.copy(srcFd, dstFile);
-
-                    photoUri = FileUtils.getUriForFile(this, dstFile);
-                    setMarkerImageView(photoUri);
-                } catch(Exception e) {
-                    Log.e(TAG, e.getMessage());
-                    Toast.makeText(this, R.string.marker_add_canceled, Toast.LENGTH_LONG).show();
-                    return;
-                }
+            } else if (resultCode == RESULT_OK) {
+                viewModel.onNewGalleryPhoto(data.getData(),
+                        viewBinding.markerEditName.getText().toString(),
+                        viewBinding.markerEditMarkerType.getText().toString(),
+                        viewBinding.markerEditDescription.getText().toString());
             }
         }
         super.onActivityResult(requestCode, resultCode, data);
@@ -273,11 +182,11 @@ public class MarkerEditActivity extends AbstractActivity {
 
     /**
      * Checks and hide/shows all buttons/options about marker photo options.
-     *
+     * <p>
      * If a photo is set then one's options are shown, otherwise another ones are shown.
      */
     private void hideAndShowOptions() {
-        boolean isPhotoSet = (marker != null && marker.hasPhoto()) || photoUri != null;
+        boolean isPhotoSet = (marker != null && marker.hasPhoto());
         if (insertPhotoMenuItem != null && insertGalleryImgMenuItem != null) {
             insertPhotoMenuItem.setVisible(!isPhotoSet);
             insertGalleryImgMenuItem.setVisible(!isPhotoSet);
@@ -306,7 +215,7 @@ public class MarkerEditActivity extends AbstractActivity {
 
     private void createMarkerWithPicture() {
         Pair<Intent, Uri> intentAndPhotoUri = IntentUtils.createTakePictureIntent(this, getTrackId());
-        photoUri = intentAndPhotoUri.second;
+        cameraPhotoUri = intentAndPhotoUri.second;
         startActivityForResult(intentAndPhotoUri.first, CAMERA_REQUEST_CODE);
     }
 
@@ -314,21 +223,4 @@ public class MarkerEditActivity extends AbstractActivity {
         Intent intent = new Intent(Intent.ACTION_PICK, MediaStore.Images.Media.EXTERNAL_CONTENT_URI);
         startActivityForResult(intent, GALLERY_IMG_REQUEST_CODE);
     }
-
-    private void addMarker() {
-        trackRecordingServiceConnection.addMarker(this,
-                viewBinding.markerEditName.getText().toString(),
-                viewBinding.markerEditMarkerType.getText().toString(),
-                viewBinding.markerEditDescription.getText().toString(),
-                photoUri != null ? photoUri.toString() : null);
-    }
-
-    private void saveMarker() {
-        marker.setName(viewBinding.markerEditName.getText().toString());
-        marker.setCategory(viewBinding.markerEditMarkerType.getText().toString());
-        marker.setDescription(viewBinding.markerEditDescription.getText().toString());
-        marker.setPhotoUrl(photoUri != null ? photoUri.toString() : null);
-
-        new ContentProviderUtils(this).updateMarker(this, marker);
-    }
 }

src/main/java/de/dennisguse/opentracks/MarkerListActivity.java

@@ -93,14 +93,11 @@ public class MarkerListActivity extends AbstractActivity implements DeleteMarker
         public void onPrepare(Menu menu, int[] positions, long[] ids, boolean showSelectAll) {
             boolean isSingleSelection = ids.length == 1;
 
-            menu.findItem(R.id.list_context_menu_share).setVisible(false);
             menu.findItem(R.id.list_context_menu_show_on_map).setVisible(isSingleSelection);
             menu.findItem(R.id.list_context_menu_edit).setVisible(isSingleSelection);
             menu.findItem(R.id.list_context_menu_delete).setVisible(true);
-            /*
-             * Set select all to the same visibility as delete since delete is the
-             * only action that can be applied to multiple markers.
-             */
+
+            // Set select all to the same visibility as delete since delete is the only action that can be applied to multiple markers.
             menu.findItem(R.id.list_context_menu_select_all).setVisible(showSelectAll);
         }
 
@@ -222,31 +219,44 @@ public class MarkerListActivity extends AbstractActivity implements DeleteMarker
             markerIds[i] = new Marker.Id(longMarkerIds[i]);
         }
 
-        Intent intent;
-        switch (itemId) {
-            case R.id.list_context_menu_show_on_map:
-                if (markerIds.length == 1) {
-                    IntentUtils.showCoordinateOnMap(this, contentProviderUtils.getMarker(markerIds[0]));
-                }
-                return true;
-            case R.id.list_context_menu_edit:
-                if (markerIds.length == 1) {
-                    intent = IntentUtils.newIntent(this, MarkerEditActivity.class)
-                            .putExtra(MarkerEditActivity.EXTRA_MARKER_ID, markerIds[0]);
-                    startActivity(intent);
-                }
-                return true;
-            case R.id.list_context_menu_delete:
-                DeleteMarkerDialogFragment.showDialog(getSupportFragmentManager(), markerIds);
-                return true;
-            case R.id.list_context_menu_select_all:
-                for (int i = 0; i < viewBinding.markerList.getCount(); i++) {
-                    viewBinding.markerList.setItemChecked(i, true);
-                }
-                return false;
-            default:
-                return false;
+        if (itemId == R.id.list_context_menu_show_on_map) {
+            if (markerIds.length == 1) {
+                IntentUtils.showCoordinateOnMap(this, contentProviderUtils.getMarker(markerIds[0]));
+            }
+            return true;
         }
+
+        if (itemId == R.id.list_context_menu_share) {
+            Intent intent = IntentUtils.newShareFileIntent(this, markerIds);
+            if (intent != null) {
+                intent = Intent.createChooser(intent, null);
+                startActivity(intent);
+            }
+            return true;
+        }
+
+        if (itemId == R.id.list_context_menu_edit) {
+            if (markerIds.length == 1) {
+                Intent intent = IntentUtils.newIntent(this, MarkerEditActivity.class)
+                        .putExtra(MarkerEditActivity.EXTRA_MARKER_ID, markerIds[0]);
+                startActivity(intent);
+            }
+            return true;
+        }
+
+        if (itemId == R.id.list_context_menu_delete) {
+            DeleteMarkerDialogFragment.showDialog(getSupportFragmentManager(), markerIds);
+            return true;
+        }
+
+        if (itemId == R.id.list_context_menu_select_all) {
+            for (int i = 0; i < viewBinding.markerList.getCount(); i++) {
+                viewBinding.markerList.setItemChecked(i, true);
+            }
+            return false;
+        }
+
+        return false;
     }
 
     @Override

src/main/java/de/dennisguse/opentracks/TrackController.java

@@ -23,7 +23,6 @@ import android.os.Handler;
 import android.view.MotionEvent;
 import android.view.View;
 import android.view.accessibility.AccessibilityEvent;
-import android.widget.ImageButton;
 
 import de.dennisguse.opentracks.databinding.TrackControllerBinding;
 import de.dennisguse.opentracks.services.TrackRecordingServiceConnection;
@@ -103,7 +102,7 @@ public class TrackController implements View.OnTouchListener {
         if (buttonDelay != null && event.getAction() == MotionEvent.ACTION_UP) {
             handlerUpdateTotalTime.removeCallbacks(buttonDelay);
             buttonDelay = null;
-            ((ImageButton) view).setPressed(false);
+            view.setPressed(false);
 
             transition.resetTransition();
 
@@ -113,7 +112,7 @@ public class TrackController implements View.OnTouchListener {
         }
 
         //Trigger button pressed animation
-        ((ImageButton) view).setPressed(true);
+        view.setPressed(true);
 
         //To pause a recording
         if (viewBinding.trackControllerRecord.equals(view)

src/main/java/de/dennisguse/opentracks/TrackDeleteActivity.java

@@ -78,6 +78,12 @@ public class TrackDeleteActivity extends AbstractActivity {
         deleteThread.interrupt();
     }
 
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        viewBinding = null;
+    }
+
     @Override
     protected View getRootView() {
         viewBinding = TrackDeleteBinding.inflate(getLayoutInflater());

src/main/java/de/dennisguse/opentracks/TrackListActivity.java

@@ -37,6 +37,7 @@ import android.widget.Toast;
 
 import androidx.annotation.NonNull;
 import androidx.appcompat.widget.SearchView;
+import androidx.appcompat.widget.Toolbar;
 import androidx.core.app.ActivityCompat;
 import androidx.cursoradapter.widget.ResourceCursorAdapter;
 import androidx.loader.app.LoaderManager;
@@ -243,6 +244,12 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
         requestGPSPermissions();
     }
 
+    @Override
+    protected void setupActionBarBack(Toolbar toolbar) {
+        setSupportActionBar(toolbar);
+        toolbar.setNavigationIcon(R.drawable.ic_logo_color_24dp);
+    }
+
     @Override
     protected void onStart() {
         super.onStart();
@@ -320,43 +327,45 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
-        Intent intent;
-        switch (item.getItemId()) {
-            case R.id.track_list_start_gps:
-                LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
-                if (locationManager != null && !locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
-                    intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
-                    startActivity(intent);
+        if (item.getItemId() == R.id.track_list_start_gps) {
+            LocationManager locationManager = (LocationManager) this.getSystemService(Context.LOCATION_SERVICE);
+            if (locationManager != null && !locationManager.isProviderEnabled(LocationManager.GPS_PROVIDER)) {
+                startActivity(new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS));
+            } else {
+                // Invoke trackRecordingService
+                if (!isGpsStarted()) {
+                    trackRecordingServiceConnection.startAndBind(this);
+                    bindChangedCallback.run();
                 } else {
-                    // Invoke trackRecordingService
-                    if (!isGpsStarted()) {
-                        trackRecordingServiceConnection.startAndBind(this);
-                        bindChangedCallback.run();
-                    } else {
-                        TrackRecordingServiceInterface trackRecordingService = trackRecordingServiceConnection.getServiceIfBound();
-                        if (trackRecordingService != null) {
-                            trackRecordingService.stopGps();
-                        }
-                        trackRecordingServiceConnection.unbindAndStop(this);
+                    TrackRecordingServiceInterface trackRecordingService = trackRecordingServiceConnection.getServiceIfBound();
+                    if (trackRecordingService != null) {
+                        trackRecordingService.stopGps();
                     }
-
-                    // Update menu after starting or stopping gps
-                    this.invalidateOptionsMenu();
+                    trackRecordingServiceConnection.unbindAndStop(this);
                 }
-                return true;
-            case R.id.track_list_aggregated_stats:
-                intent = IntentUtils.newIntent(this, AggregatedStatisticsActivity.class);
-                startActivity(intent);
-                return true;
-            case R.id.track_list_markers:
-                intent = IntentUtils.newIntent(this, MarkerListActivity.class);
-                startActivity(intent);
-                return true;
-            case R.id.track_list_settings:
-                intent = IntentUtils.newIntent(this, SettingsActivity.class);
-                startActivity(intent);
-                return true;
+
+                // Update menu after starting or stopping gps
+                this.invalidateOptionsMenu();
+            }
+
+            return true;
         }
+
+        if (item.getItemId() == R.id.track_list_aggregated_stats) {
+            startActivity(IntentUtils.newIntent(this, AggregatedStatisticsActivity.class));
+            return true;
+        }
+
+        if (item.getItemId() == R.id.track_list_markers) {
+            startActivity(IntentUtils.newIntent(this, MarkerListActivity.class));
+            return true;
+        }
+
+        if (item.getItemId() == R.id.track_list_settings) {
+            startActivity(IntentUtils.newIntent(this, SettingsActivity.class));
+            return true;
+        }
+
         return super.onOptionsItemSelected(item);
     }
 
@@ -467,31 +476,37 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
             trackIds[i] = new Track.Id(longTrackIds[i]);
         }
 
-        Intent intent;
-        switch (itemId) {
-            case R.id.list_context_menu_show_on_map:
-                IntentDashboardUtils.startDashboard(this, false, trackIds);
-                return true;
-            case R.id.list_context_menu_share:
-                intent = IntentUtils.newShareFileIntent(this, trackIds);
-                intent = Intent.createChooser(intent, null);
-                startActivity(intent);
-                return true;
-            case R.id.list_context_menu_edit:
-                intent = IntentUtils.newIntent(this, TrackEditActivity.class)
-                        .putExtra(TrackEditActivity.EXTRA_TRACK_ID, trackIds[0]);
-                startActivity(intent);
-                return true;
-            case R.id.list_context_menu_delete:
-                deleteTracks(trackIds);
-                return true;
-            case R.id.list_context_menu_select_all:
-                int size = viewBinding.trackList.getCount();
-                for (int i = 0; i < size; i++) {
-                    viewBinding.trackList.setItemChecked(i, true);
-                }
-                return false;
+        if (itemId == R.id.list_context_menu_show_on_map) {
+            IntentDashboardUtils.startDashboard(this, false, trackIds);
+            return true;
         }
+
+        if (itemId == R.id.list_context_menu_share) {
+            Intent intent = IntentUtils.newShareFileIntent(this, trackIds);
+            intent = Intent.createChooser(intent, null);
+            startActivity(intent);
+            return true;
+        }
+
+
+        if (itemId == R.id.list_context_menu_edit) {
+            Intent intent = IntentUtils.newIntent(this, TrackEditActivity.class)
+                    .putExtra(TrackEditActivity.EXTRA_TRACK_ID, trackIds[0]);
+            startActivity(intent);
+            return true;
+        }
+
+        if (itemId == R.id.list_context_menu_delete) {
+            deleteTracks(trackIds);
+            return true;
+        }
+        if (itemId == R.id.list_context_menu_select_all) {
+            for (int i = 0; i < viewBinding.trackList.getCount(); i++) {
+                viewBinding.trackList.setItemChecked(i, true);
+            }
+            return false;
+        }
+
         return false;
     }
 

src/main/java/de/dennisguse/opentracks/TrackRecordedActivity.java

@@ -25,8 +25,10 @@ import android.view.View;
 
 import androidx.annotation.NonNull;
 import androidx.fragment.app.Fragment;
-import androidx.fragment.app.FragmentManager;
-import androidx.fragment.app.FragmentPagerAdapter;
+import androidx.fragment.app.FragmentActivity;
+import androidx.viewpager2.adapter.FragmentStateAdapter;
+
+import com.google.android.material.tabs.TabLayoutMediator;
 
 import de.dennisguse.opentracks.content.TrackDataHub;
 import de.dennisguse.opentracks.content.data.Marker;
@@ -75,8 +77,10 @@ public class TrackRecordedActivity extends AbstractListActivity implements Confi
 
         trackDataHub = new TrackDataHub(this);
 
-        viewBinding.trackDetailActivityViewPager.setAdapter(new CustomFragmentPagerAdapter(getSupportFragmentManager(), FragmentPagerAdapter.BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT));
-        viewBinding.trackDetailActivityTablayout.setupWithViewPager(viewBinding.trackDetailActivityViewPager);
+        CustomFragmentPagerAdapter pagerAdapter = new CustomFragmentPagerAdapter(this);
+        viewBinding.trackDetailActivityViewPager.setAdapter(pagerAdapter);
+        new TabLayoutMediator(viewBinding.trackDetailActivityTablayout, viewBinding.trackDetailActivityViewPager,
+                (tab, position) -> tab.setText(pagerAdapter.getPageTitle(position))).attach();
         if (savedInstanceState != null) {
             viewBinding.trackDetailActivityViewPager.setCurrentItem(savedInstanceState.getInt(CURRENT_TAB_TAG_KEY));
         }
@@ -142,43 +146,51 @@ public class TrackRecordedActivity extends AbstractListActivity implements Confi
 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
-        Intent intent;
-        switch (item.getItemId()) {
-            case R.id.track_detail_share:
-                intent = IntentUtils.newShareFileIntent(this, trackId);
-                intent = Intent.createChooser(intent, null);
-                startActivity(intent);
-                return true;
-            case R.id.track_detail_menu_show_on_map:
-                IntentDashboardUtils.startDashboard(this, false, trackId);
-                return true;
-            case R.id.track_detail_markers:
-                intent = IntentUtils.newIntent(this, MarkerListActivity.class)
-                        .putExtra(MarkerListActivity.EXTRA_TRACK_ID, trackId);
-                startActivity(intent);
-                return true;
-            case R.id.track_detail_edit:
-                intent = IntentUtils.newIntent(this, TrackEditActivity.class)
-                        .putExtra(TrackEditActivity.EXTRA_TRACK_ID, trackId);
-                startActivity(intent);
-                return true;
-            case R.id.track_detail_delete:
-                deleteTracks(trackId);
-                return true;
-            case R.id.track_detail_resume_track:
-                Intent newIntent = IntentUtils.newIntent(TrackRecordedActivity.this, TrackRecordingActivity.class)
-                        .putExtra(TrackRecordingActivity.EXTRA_TRACK_ID, trackId);
-                startActivity(newIntent);
-                overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
-                finish();
-                return true;
-            case R.id.track_detail_settings:
-                intent = IntentUtils.newIntent(this, SettingsActivity.class);
-                startActivity(intent);
-                return true;
-            default:
-                return super.onOptionsItemSelected(item);
+        if (item.getItemId() == R.id.track_detail_share) {
+            Intent intent = Intent.createChooser(IntentUtils.newShareFileIntent(this, trackId), null);
+            startActivity(intent);
+            return true;
         }
+
+        if (item.getItemId() == R.id.track_detail_menu_show_on_map) {
+            IntentDashboardUtils.startDashboard(this, false, trackId);
+            return true;
+        }
+
+        if (item.getItemId() == R.id.track_detail_markers) {
+            Intent intent = IntentUtils.newIntent(this, MarkerListActivity.class)
+                    .putExtra(MarkerListActivity.EXTRA_TRACK_ID, trackId);
+            startActivity(intent);
+            return true;
+        }
+
+        if (item.getItemId() == R.id.track_detail_edit) {
+            Intent intent = IntentUtils.newIntent(this, TrackEditActivity.class)
+                    .putExtra(TrackEditActivity.EXTRA_TRACK_ID, trackId);
+            startActivity(intent);
+            return true;
+        }
+
+        if (item.getItemId() == R.id.track_detail_delete) {
+            deleteTracks(trackId);
+            return true;
+        }
+
+        if (item.getItemId() == R.id.track_detail_resume_track) {
+            Intent newIntent = IntentUtils.newIntent(TrackRecordedActivity.this, TrackRecordingActivity.class)
+                    .putExtra(TrackRecordingActivity.EXTRA_TRACK_ID, trackId);
+            startActivity(newIntent);
+            overridePendingTransition(android.R.anim.fade_in, android.R.anim.fade_out);
+            finish();
+            return true;
+        }
+
+        if (item.getItemId() == R.id.track_detail_settings) {
+            startActivity(IntentUtils.newIntent(this, SettingsActivity.class));
+            return true;
+        }
+
+        return super.onOptionsItemSelected(item);
     }
 
     @Override
@@ -220,20 +232,15 @@ public class TrackRecordedActivity extends AbstractListActivity implements Confi
         }
     }
 
-    private class CustomFragmentPagerAdapter extends FragmentPagerAdapter {
+    private class CustomFragmentPagerAdapter extends FragmentStateAdapter {
 
-        public CustomFragmentPagerAdapter(@NonNull FragmentManager fm, int behavior) {
-            super(fm, behavior);
-        }
-
-        @Override
-        public int getCount() {
-            return 4;
+        public CustomFragmentPagerAdapter(@NonNull FragmentActivity fa) {
+            super(fa);
         }
 
         @NonNull
         @Override
-        public Fragment getItem(int position) {
+        public Fragment createFragment(int position) {
             switch (position) {
                 case 0:
                     return StatisticsRecordedFragment.newInstance(trackId);
@@ -249,6 +256,10 @@ public class TrackRecordedActivity extends AbstractListActivity implements Confi
         }
 
         @Override
+        public int getItemCount() {
+            return 4;
+        }
+
         public CharSequence getPageTitle(int position) {
             switch (position) {
                 case 0:

src/main/java/de/dennisguse/opentracks/TrackRecordingActivity.java

@@ -13,8 +13,10 @@ import android.view.WindowManager;
 
 import androidx.annotation.NonNull;
 import androidx.fragment.app.Fragment;
-import androidx.fragment.app.FragmentManager;
-import androidx.fragment.app.FragmentPagerAdapter;
+import androidx.fragment.app.FragmentActivity;
+import androidx.viewpager2.adapter.FragmentStateAdapter;
+
+import com.google.android.material.tabs.TabLayoutMediator;
 
 import de.dennisguse.opentracks.content.TrackDataHub;
 import de.dennisguse.opentracks.content.data.Track;
@@ -148,8 +150,10 @@ public class TrackRecordingActivity extends AbstractActivity implements ChooseAc
         trackRecordingServiceConnection = new TrackRecordingServiceConnection(bindChangedCallback);
         trackDataHub = new TrackDataHub(this);
 
-        viewBinding.trackDetailActivityViewPager.setAdapter(new CustomFragmentPagerAdapter(getSupportFragmentManager(), FragmentPagerAdapter.BEHAVIOR_RESUME_ONLY_CURRENT_FRAGMENT));
-        viewBinding.trackDetailActivityTablayout.setupWithViewPager(viewBinding.trackDetailActivityViewPager);
+        CustomFragmentPagerAdapter pagerAdapter = new CustomFragmentPagerAdapter(this);
+        viewBinding.trackDetailActivityViewPager.setAdapter(pagerAdapter);
+        new TabLayoutMediator(viewBinding.trackDetailActivityTablayout, viewBinding.trackDetailActivityViewPager,
+                (tab, position) -> tab.setText(pagerAdapter.getPageTitle(position))).attach();
         if (savedInstanceState != null) {
             viewBinding.trackDetailActivityViewPager.setCurrentItem(savedInstanceState.getInt(CURRENT_TAB_TAG_KEY));
         }
@@ -274,34 +278,41 @@ public class TrackRecordingActivity extends AbstractActivity implements ChooseAc
 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
-        Intent intent;
-        switch (item.getItemId()) {
-            case R.id.track_detail_insert_marker:
-                intent = IntentUtils
-                        .newIntent(this, MarkerEditActivity.class)
-                        .putExtra(MarkerEditActivity.EXTRA_TRACK_ID, trackId);
-                startActivity(intent);
-                return true;
-            case R.id.track_detail_menu_show_on_map:
-                IntentDashboardUtils.startDashboard(this, true, trackId);
-                return true;
-            case R.id.track_detail_markers:
-                intent = IntentUtils.newIntent(this, MarkerListActivity.class)
-                        .putExtra(MarkerListActivity.EXTRA_TRACK_ID, trackId);
-                startActivity(intent);
-                return true;
-            case R.id.track_detail_edit:
-                intent = IntentUtils.newIntent(this, TrackEditActivity.class)
-                        .putExtra(TrackEditActivity.EXTRA_TRACK_ID, trackId);
-                startActivity(intent);
-                return true;
-            case R.id.track_detail_settings:
-                intent = IntentUtils.newIntent(this, SettingsActivity.class);
-                startActivity(intent);
-                return true;
-            default:
-                return super.onOptionsItemSelected(item);
+        if (item.getItemId() == R.id.track_detail_insert_marker) {
+            Intent intent = IntentUtils
+                    .newIntent(this, MarkerEditActivity.class)
+                    .putExtra(MarkerEditActivity.EXTRA_TRACK_ID, trackId);
+            startActivity(intent);
+            return true;
         }
+
+        if (item.getItemId() == R.id.track_detail_menu_show_on_map) {
+            IntentDashboardUtils.startDashboard(this, true, trackId);
+            return true;
+        }
+
+        if (item.getItemId() == R.id.track_detail_markers) {
+            Intent intent = IntentUtils.newIntent(this, MarkerListActivity.class)
+                    .putExtra(MarkerListActivity.EXTRA_TRACK_ID, trackId);
+            startActivity(intent);
+            return true;
+
+        }
+
+        if (item.getItemId() == R.id.track_detail_edit) {
+            Intent intent = IntentUtils.newIntent(this, TrackEditActivity.class)
+                    .putExtra(TrackEditActivity.EXTRA_TRACK_ID, trackId);
+            startActivity(intent);
+            return true;
+        }
+
+        if (item.getItemId() == R.id.track_detail_settings) {
+            Intent intent = IntentUtils.newIntent(this, SettingsActivity.class);
+            startActivity(intent);
+            return true;
+        }
+
+        return super.onOptionsItemSelected(item);
     }
 
     /**
@@ -358,20 +369,15 @@ public class TrackRecordingActivity extends AbstractActivity implements ChooseAc
         finish();
     }
 
-    private class CustomFragmentPagerAdapter extends FragmentPagerAdapter {
+    private class CustomFragmentPagerAdapter extends FragmentStateAdapter {
 
-        public CustomFragmentPagerAdapter(@NonNull FragmentManager fm, int behavior) {
-            super(fm, behavior);
-        }
-
-        @Override
-        public int getCount() {
-            return 4;
+        public CustomFragmentPagerAdapter(@NonNull FragmentActivity fa) {
+            super(fa);
         }
 
         @NonNull
         @Override
-        public Fragment getItem(int position) {
+        public Fragment createFragment(int position) {
             switch (position) {
                 case 0:
                     return StatisticsRecordingFragment.newInstance();
@@ -387,6 +393,10 @@ public class TrackRecordingActivity extends AbstractActivity implements ChooseAc
         }
 
         @Override
+        public int getItemCount() {
+            return 4;
+        }
+
         public CharSequence getPageTitle(int position) {
             switch (position) {
                 case 0:

src/main/java/de/dennisguse/opentracks/adapters/AggregatedStatisticsAdapter.java

@@ -46,49 +46,45 @@ public class AggregatedStatisticsAdapter extends BaseAdapter {
 
     @Override
     public View getView(int position, View convertView, ViewGroup parent) {
-        AggregatedStatistics.AggregatedStatistic aggregatedStats = getItem(position);
-        ViewHolder viewHolder;
+        AggregatedStatistics.AggregatedStatistic aggregatedStatistic = getItem(position);
 
-        if (isSpeedSport(position)) {
-            viewHolder = new ViewSpeedHolder();
+        ViewHolder viewHolder;
+        if (convertView == null) {
+            convertView = LayoutInflater.from(context).inflate(R.layout.aggregated_stats_list_item, parent, false);
+            viewHolder = new ViewHolder(convertView);
+            convertView.setTag(viewHolder);
         } else {
-            viewHolder = new ViewPaceHolder();
+            viewHolder = (ViewHolder) convertView.getTag();
         }
 
-        convertView = LayoutInflater.from(context).inflate(R.layout.aggregated_stats_list_item, parent, false);
-        viewHolder.setValues(convertView, getIcon(position), getName(position), aggregatedStats);
+        if (TrackIconUtils.isSpeedIcon(context, aggregatedStatistic.getCategory())) {
+            viewHolder.setSpeed(aggregatedStatistic);
+        } else {
+            viewHolder.setPace(aggregatedStatistic);
+        }
 
         return convertView;
     }
 
-    private boolean isSpeedSport(int position) {
-        String category = aggregatedStatistics.getSportName(position);
-        return TrackIconUtils.isSpeedIcon(context, category);
-    }
-
-    private int getIcon(int position) {
-        String iconValue = TrackIconUtils.getIconValue(context, aggregatedStatistics.getSportName(position));
-        return TrackIconUtils.getIconDrawable(iconValue);
-    }
-
-    private String getName(int position) {
-        return aggregatedStatistics.getSportName(position);
-    }
-
     private class ViewHolder {
-        protected ImageView sportIcon;
-        protected TextView typeLabel;
-        protected TextView numTracks;
-        protected TextView distance;
-        protected TextView distanceUnit;
-        protected TextView time;
-        protected boolean metricsUnits;
-        protected boolean reportSpeed;
+        private final ImageView sportIcon;
+        private final TextView typeLabel;
+        private final TextView numTracks;
+        private final TextView distance;
+        private final TextView distanceUnit;
+        private final TextView time;
 
-        public void setValues(View view, int iconDrawable, String name, AggregatedStatistics.AggregatedStatistic aggregatedStats) {
-            reportSpeed = PreferencesUtils.isReportSpeed(context, name);
-            metricsUnits = PreferencesUtils.isMetricUnits(context);
+        private final TextView avgSpeed;
+        private final TextView avgSpeedUnit;
+        private final TextView avgSpeedLabel;
+        private final TextView maxSpeed;
+        private final TextView maxSpeedUnit;
+        private final TextView maxSpeedLabel;
 
+        private boolean metricsUnits;
+        private boolean reportSpeed;
+
+        public ViewHolder(View view) {
             sportIcon = view.findViewById(R.id.aggregated_stats_sport_icon);
             typeLabel = view.findViewById(R.id.aggregated_stats_type_label);
             numTracks = view.findViewById(R.id.aggregated_stats_num_tracks);
@@ -96,86 +92,68 @@ public class AggregatedStatisticsAdapter extends BaseAdapter {
             distanceUnit = view.findViewById(R.id.aggregated_stats_distance_unit);
             time = view.findViewById(R.id.aggregated_stats_time);
 
-            sportIcon.setImageResource(iconDrawable);
-            typeLabel.setText(name);
-            numTracks.setText(StringUtils.valueInParentheses(String.valueOf(aggregatedStats.getCountTracks())));
-
-            Pair<String, String> parts = StringUtils.getDistanceParts(context, aggregatedStats.getTrackStatistics().getTotalDistance(), metricsUnits);
-            distance.setText(parts.first);
-            distanceUnit.setText(parts.second);
-
-            time.setText(StringUtils.formatElapsedTime(aggregatedStats.getTrackStatistics().getMovingTime()));
-        }
-    }
-
-    private class ViewSpeedHolder extends ViewHolder {
-        private TextView avgSpeed;
-        private TextView avgSpeedUnit;
-        private TextView avgSpeedLabel;
-        private TextView maxSpeed;
-        private TextView maxSpeedUnit;
-        private TextView maxSpeedLabel;
-
-        @Override
-        public void setValues(View view, int iconDrawable, String name, AggregatedStatistics.AggregatedStatistic aggregatedStats) {
-            super.setValues(view, iconDrawable, name, aggregatedStats);
-
             avgSpeed = view.findViewById(R.id.aggregated_stats_avg_rate);
             avgSpeedUnit = view.findViewById(R.id.aggregated_stats_avg_rate_unit);
             avgSpeedLabel = view.findViewById(R.id.aggregated_stats_avg_rate_label);
             maxSpeed = view.findViewById(R.id.aggregated_stats_max_rate);
             maxSpeedUnit = view.findViewById(R.id.aggregated_stats_max_rate_unit);
             maxSpeedLabel = view.findViewById(R.id.aggregated_stats_max_rate_label);
+        }
 
+        public void setSpeed(AggregatedStatistics.AggregatedStatistic aggregatedStatistic) {
+            setCommonValues(aggregatedStatistic);
             {
-                Pair<String, String> parts = StringUtils.getSpeedParts(context, aggregatedStats.getTrackStatistics().getAverageMovingSpeed(), metricsUnits, reportSpeed);
+                Pair<String, String> parts = StringUtils.getSpeedParts(context, aggregatedStatistic.getTrackStatistics().getAverageMovingSpeed(), metricsUnits, reportSpeed);
                 avgSpeed.setText(parts.first);
                 avgSpeedUnit.setText(parts.second);
                 avgSpeedLabel.setText(context.getString(R.string.stats_average_moving_speed));
             }
 
             {
-                Pair<String, String> parts = StringUtils.getSpeedParts(context, aggregatedStats.getTrackStatistics().getMaxSpeed(), metricsUnits, reportSpeed);
+                Pair<String, String> parts = StringUtils.getSpeedParts(context, aggregatedStatistic.getTrackStatistics().getMaxSpeed(), metricsUnits, reportSpeed);
                 maxSpeed.setText(parts.first);
                 maxSpeedUnit.setText(parts.second);
                 maxSpeedLabel.setText(context.getString(R.string.stats_max_speed));
             }
         }
-    }
-
-    private class ViewPaceHolder extends ViewHolder {
-        private TextView avgPace;
-        private TextView avgPaceUnit;
-        private TextView avgPaceLabel;
-        private TextView maxPace;
-        private TextView maxPaceUnit;
-        private TextView maxPaceLabel;
-
-        @Override
-        public void setValues(View view, int iconDrawable, String name, AggregatedStatistics.AggregatedStatistic aggregatedStats) {
-            super.setValues(view, iconDrawable, name, aggregatedStats);
-
-            avgPace = view.findViewById(R.id.aggregated_stats_avg_rate);
-            avgPaceUnit = view.findViewById(R.id.aggregated_stats_avg_rate_unit);
-            avgPaceLabel = view.findViewById(R.id.aggregated_stats_avg_rate_label);
-
-            maxPace = view.findViewById(R.id.aggregated_stats_max_rate);
-            maxPaceUnit = view.findViewById(R.id.aggregated_stats_max_rate_unit);
-            maxPaceLabel = view.findViewById(R.id.aggregated_stats_max_rate_label);
 
+        public void setPace(AggregatedStatistics.AggregatedStatistic aggregatedStatistic) {
+            setCommonValues(aggregatedStatistic);
             {
-                Pair<String, String> parts = StringUtils.getSpeedParts(context, aggregatedStats.getTrackStatistics().getAverageMovingSpeed(), metricsUnits, reportSpeed);
-                avgPace.setText(parts.first);
-                avgPaceUnit.setText(parts.second);
-                avgPaceLabel.setText(R.string.stats_average_moving_pace);
+                Pair<String, String> parts = StringUtils.getSpeedParts(context, aggregatedStatistic.getTrackStatistics().getAverageMovingSpeed(), metricsUnits, reportSpeed);
+                avgSpeed.setText(parts.first);
+                avgSpeedUnit.setText(parts.second);
+                avgSpeedLabel.setText(context.getString(R.string.stats_average_moving_pace));
             }
 
             {
-                Pair<String, String> parts = StringUtils.getSpeedParts(context, aggregatedStats.getTrackStatistics().getMaxSpeed(), metricsUnits, reportSpeed);
-                maxPace.setText(parts.first);
-                maxPaceUnit.setText(parts.second);
-                maxPaceLabel.setText(R.string.stats_fastest_pace);
+                Pair<String, String> parts = StringUtils.getSpeedParts(context, aggregatedStatistic.getTrackStatistics().getMaxSpeed(), metricsUnits, reportSpeed);
+                maxSpeed.setText(parts.first);
+                maxSpeedUnit.setText(parts.second);
+                maxSpeedLabel.setText(R.string.stats_fastest_pace);
             }
         }
+
+        private void setCommonValues(AggregatedStatistics.AggregatedStatistic aggregatedStatistic) {
+            String category = aggregatedStatistic.getCategory();
+
+            reportSpeed = PreferencesUtils.isReportSpeed(context, category);
+            metricsUnits = PreferencesUtils.isMetricUnits(context);
+
+            sportIcon.setImageResource(getIcon(aggregatedStatistic));
+            typeLabel.setText(category);
+            numTracks.setText(StringUtils.valueInParentheses(String.valueOf(aggregatedStatistic.getCountTracks())));
+
+            Pair<String, String> parts = StringUtils.getDistanceParts(context, aggregatedStatistic.getTrackStatistics().getTotalDistance(), metricsUnits);
+            distance.setText(parts.first);
+            distanceUnit.setText(parts.second);
+
+            time.setText(StringUtils.formatElapsedTime(aggregatedStatistic.getTrackStatistics().getMovingTime()));
+        }
+
+        private int getIcon(AggregatedStatistics.AggregatedStatistic aggregatedStatistic) {
+            String iconValue = TrackIconUtils.getIconValue(context, aggregatedStatistic.getCategory());
+            return TrackIconUtils.getIconDrawable(iconValue);
+        }
     }
 }

src/main/java/de/dennisguse/opentracks/adapters/IntervalStatisticsAdapter.java

@@ -1,7 +1,6 @@
 package de.dennisguse.opentracks.adapters;
 
 import android.content.Context;
-import android.util.Pair;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.view.ViewGroup;
@@ -20,10 +19,9 @@ import de.dennisguse.opentracks.viewmodels.IntervalStatistics;
 
 public class IntervalStatisticsAdapter extends ArrayAdapter<IntervalStatistics.Interval> {
 
-    private StackMode stackMode;
-    private boolean metricUnits;
-    private float sumDistance_m;
-    private String category;
+    private final StackMode stackMode;
+    private final boolean metricUnits;
+    private final String category;
 
     public IntervalStatisticsAdapter(Context context, List<IntervalStatistics.Interval> intervalList, String category, StackMode stackMode) {
         super(context, R.layout.interval_stats_list_item, intervalList);
@@ -47,12 +45,14 @@ public class IntervalStatisticsAdapter extends ArrayAdapter<IntervalStatistics.I
             viewHolder.distance = intervalView.findViewById(R.id.interval_item_distance);
             viewHolder.rate = intervalView.findViewById(R.id.interval_item_rate);
             viewHolder.gain = intervalView.findViewById(R.id.interval_item_gain);
+            viewHolder.loss = intervalView.findViewById(R.id.interval_item_loss);
 
             intervalView.setTag(viewHolder);
         } else {
             viewHolder = (ViewHolder) intervalView.getTag();
         }
 
+        float sumDistance_m;
         if (actualPosition + 1 == getCount() && actualPosition > 0) {
             sumDistance_m = actualPosition * getItem(actualPosition - 1).getDistance_m() + interval.getDistance_m();
         } else {
@@ -61,15 +61,13 @@ public class IntervalStatisticsAdapter extends ArrayAdapter<IntervalStatistics.I
         viewHolder.distance.setText(StringUtils.formatDistance(getContext(), sumDistance_m, metricUnits));
 
         if (PreferencesUtils.isReportSpeed(getContext(), category)) {
-            Pair<String, String> speedParts = StringUtils.getSpeedParts(getContext(), interval.getSpeed_ms(), metricUnits, true);
-            viewHolder.rate.setText(speedParts.first + " " + speedParts.second);
+            viewHolder.rate.setText(StringUtils.formatSpeed(getContext(), interval.getSpeed_ms(), metricUnits, true));
         } else {
-            Pair<String, String> paceParts = StringUtils.getSpeedParts(getContext(), interval.getSpeed_ms(), metricUnits, false);
-            viewHolder.rate.setText(paceParts.first + " " + paceParts.second);
+            viewHolder.rate.setText(StringUtils.formatSpeed(getContext(), interval.getSpeed_ms(), metricUnits, false));
         }
 
-        Pair<String, String> gainParts = StringUtils.formatElevation(getContext(), interval.getGain_m(), metricUnits);
-        viewHolder.gain.setText(gainParts.first + " " + gainParts.second);
+        viewHolder.gain.setText(StringUtils.formatDistance(getContext(), interval.getGain_m(), metricUnits));
+        viewHolder.loss.setText(StringUtils.formatDistance(getContext(), interval.getLoss_m(), metricUnits));
 
         return intervalView;
     }
@@ -86,5 +84,6 @@ public class IntervalStatisticsAdapter extends ArrayAdapter<IntervalStatistics.I
         private TextView distance;
         private TextView rate;
         private TextView gain;
+        private TextView loss;
     }
 }

src/main/java/de/dennisguse/opentracks/chart/ChartValueSeries.java

@@ -68,7 +68,7 @@ abstract class ChartValueSeries {
      * @param fillColor       the fill color
      * @param strokeColor     the stroke color
      */
-    ChartValueSeries(Context context, int absoluteMin, int absoluteMax, int[] intervalValues, int metricTitleId, int imperialTitleId, int fillColor, int strokeColor) {
+    ChartValueSeries(Context context, int absoluteMin, int absoluteMax, int[] intervalValues, int metricTitleId, int imperialTitleId, int fillColor, int strokeColor, int fontSizeSmall, int fontSizeMedium) {
         this.absoluteMin = absoluteMin;
         this.absoluteMax = absoluteMax;
         this.intervalValues = intervalValues;
@@ -85,16 +85,14 @@ abstract class ChartValueSeries {
         strokePaint.setColor(context.getResources().getColor(strokeColor));
         strokePaint.setAntiAlias(true);
 
-        float scale = context.getResources().getDisplayMetrics().density;
-
         // Make copies of the stroke paint with the default thickness
         titlePaint = new Paint(strokePaint);
-        titlePaint.setTextSize(ChartView.MEDIUM_TEXT_SIZE * scale);
+        titlePaint.setTextSize(fontSizeMedium);
         titlePaint.setTextAlign(Align.CENTER);
         titlePaint.setStyle(Style.FILL_AND_STROKE);
 
         markerPaint = new Paint(strokePaint);
-        markerPaint.setTextSize(ChartView.SMALL_TEXT_SIZE * scale);
+        markerPaint.setTextSize(fontSizeSmall);
         markerPaint.setTextAlign(Align.RIGHT);
         markerPaint.setStyle(Style.FILL_AND_STROKE);
 

src/main/java/de/dennisguse/opentracks/chart/ChartView.java

@@ -30,9 +30,11 @@ import android.view.GestureDetector;
 import android.view.MotionEvent;
 import android.view.ScaleGestureDetector;
 import android.view.View;
+import android.view.ViewParent;
 import android.widget.Scroller;
 
 import androidx.annotation.NonNull;
+import androidx.core.content.ContextCompat;
 import androidx.core.view.GestureDetectorCompat;
 
 import java.text.NumberFormat;
@@ -58,9 +60,6 @@ import de.dennisguse.opentracks.util.UnitConversions;
  */
 public class ChartView extends View {
 
-    static final float MEDIUM_TEXT_SIZE = 18f;
-    static final float SMALL_TEXT_SIZE = 12f;
-
     static final int Y_AXIS_INTERVALS = 5;
 
     private static final int TARGET_X_AXIS_INTERVALS = 4;
@@ -114,7 +113,7 @@ public class ChartView extends View {
     private int effectiveWidth = 0;
     private int effectiveHeight = 0;
 
-    private boolean chartByDistance;
+    private final boolean chartByDistance;
     private boolean metricUnits = true;
     private boolean reportSpeed = true;
     private boolean showPointer = false;
@@ -192,6 +191,9 @@ public class ChartView extends View {
     public ChartView(Context context, final boolean chartByDistance) {
         super(context);
         this.chartByDistance = chartByDistance;
+        int fontSizeSmall = ThemeUtils.getFontSizeSmallInPx(context);
+        int fontSizeMedium = ThemeUtils.getFontSizeMediumInPx(context);
+
         seriesList.add(new ChartValueSeries(context,
                 Integer.MIN_VALUE,
                 Integer.MAX_VALUE,
@@ -199,7 +201,9 @@ public class ChartView extends View {
                 R.string.description_elevation_metric,
                 R.string.description_elevation_imperial,
                 R.color.chart_elevation_fill,
-                R.color.chart_elevation_border) {
+                R.color.chart_elevation_border,
+                fontSizeSmall,
+                fontSizeMedium) {
             @Override
             protected double extractDataFromChartPoint(@NonNull ChartPoint chartPoint) {
                 return chartPoint.getElevation();
@@ -218,7 +222,9 @@ public class ChartView extends View {
                 R.string.description_speed_metric,
                 R.string.description_speed_imperial,
                 R.color.chart_speed_fill,
-                R.color.chart_speed_border) {
+                R.color.chart_speed_border,
+                fontSizeSmall,
+                fontSizeMedium) {
             @Override
             protected double extractDataFromChartPoint(@NonNull ChartPoint chartPoint) {
                 return chartPoint.getSpeed();
@@ -238,7 +244,9 @@ public class ChartView extends View {
                 R.string.description_pace_metric,
                 R.string.description_pace_imperial,
                 R.color.chart_pace_fill,
-                R.color.chart_pace_border) {
+                R.color.chart_pace_border,
+                fontSizeSmall,
+                fontSizeMedium) {
             @Override
             protected double extractDataFromChartPoint(@NonNull ChartPoint chartPoint) {
                 return chartPoint.getPace();
@@ -258,7 +266,9 @@ public class ChartView extends View {
                 R.string.description_sensor_heart_rate,
                 R.string.description_sensor_heart_rate,
                 R.color.chart_heart_rate_fill,
-                R.color.chart_heart_rate_border) {
+                R.color.chart_heart_rate_border,
+                fontSizeSmall,
+                fontSizeMedium) {
             @Override
             protected double extractDataFromChartPoint(@NonNull ChartPoint chartPoint) {
                 return chartPoint.getHeartRate();
@@ -277,7 +287,9 @@ public class ChartView extends View {
                 R.string.description_sensor_cadence,
                 R.string.description_sensor_cadence,
                 R.color.chart_cadence_fill,
-                R.color.chart_cadence_border) {
+                R.color.chart_cadence_border,
+                fontSizeSmall,
+                fontSizeMedium) {
             @Override
             protected double extractDataFromChartPoint(@NonNull ChartPoint chartPoint) {
                 return chartPoint.getCadence();
@@ -295,7 +307,9 @@ public class ChartView extends View {
                 R.string.description_sensor_power,
                 R.string.description_sensor_power,
                 R.color.chart_power_fill,
-                R.color.chart_power_border) {
+                R.color.chart_power_border,
+                fontSizeSmall,
+                fontSizeMedium) {
             @Override
             protected double extractDataFromChartPoint(@NonNull ChartPoint chartPoint) {
                 return chartPoint.getPower();
@@ -309,13 +323,11 @@ public class ChartView extends View {
 
         backgroundColor = ThemeUtils.getBackgroundColor(context);
 
-        float scale = context.getResources().getDisplayMetrics().density;
-
         axisPaint = new Paint();
         axisPaint.setStyle(Style.FILL_AND_STROKE);
         axisPaint.setColor(ThemeUtils.getTextColorPrimary(context));
         axisPaint.setAntiAlias(true);
-        axisPaint.setTextSize(SMALL_TEXT_SIZE * scale);
+        axisPaint.setTextSize(fontSizeSmall);
 
         xAxisMarkerPaint = new Paint(axisPaint);
         xAxisMarkerPaint.setTextAlign(Align.CENTER);
@@ -330,7 +342,7 @@ public class ChartView extends View {
         markerPaint.setStyle(Style.STROKE);
         markerPaint.setAntiAlias(false);
 
-        pointer = context.getResources().getDrawable(R.drawable.ic_logo_color_24dp);
+        pointer = ContextCompat.getDrawable(context, R.drawable.ic_logo_color_24dp);
         pointer.setBounds(0, 0, pointer.getIntrinsicWidth(), pointer.getIntrinsicHeight());
 
         markerPin = MarkerUtils.getDefaultPhoto(context);
@@ -489,6 +501,18 @@ public class ChartView extends View {
         invalidate();
     }
 
+    /**
+     * Handle parent's view disallow touch event.
+     *
+     * @param disallow Does disallow parent touch event?
+     */
+    private void requestDisallowInterceptTouchEventInParent(boolean disallow) {
+        ViewParent parent = getParent();
+        if (parent != null) {
+            parent.requestDisallowInterceptTouchEvent(disallow);
+        }
+    }
+
     /**
      * Scrolls the view horizontally by a given amount.
      *
@@ -496,13 +520,15 @@ public class ChartView extends View {
      */
     private void scrollBy(int deltaX) {
         int scrollX = getScrollX() + deltaX;
-        if (scrollX < 0) {
+        if (scrollX <= 0) {
             scrollX = 0;
         }
+
         int maxWidth = effectiveWidth * (zoomLevel - 1);
-        if (scrollX > maxWidth) {
+        if (scrollX >= maxWidth) {
             scrollX = maxWidth;
         }
+
         scrollTo(scrollX, 0);
     }
 
@@ -527,6 +553,10 @@ public class ChartView extends View {
     public boolean onTouchEvent(MotionEvent event) {
         boolean isZoom = detectorZoom.onTouchEvent(event);
         boolean isScrollTab = detectorScrollFlingTab.onTouchEvent(event);
+
+        // ChartView handles zoom gestures (more than one pointer) and all gestures when zoomed itself
+        requestDisallowInterceptTouchEventInParent(event.getPointerCount() != 1 || zoomLevel != MIN_ZOOM_LEVEL);
+
         return isZoom || isScrollTab;
     }
 
@@ -881,6 +911,7 @@ public class ChartView extends View {
 
     /**
      * Finds the index of the first data point containing data for a series.
+     *
      * @return -1 if no data point contains data for the series.
      */
     private int getFirstPopulatedChartDataIndex(ChartValueSeries chartValueSeries) {

src/main/java/de/dennisguse/opentracks/content/DescriptionGenerator.java

@@ -140,6 +140,11 @@ public class DescriptionGenerator {
             writeElevation(stats.getTotalElevationGain(), builder, R.string.description_elevation_gain, lineBreak);
         }
 
+        // Elevation loss
+        if (stats.hasTotalElevationLoss()) {
+            writeElevation(stats.getTotalElevationLoss(), builder, R.string.description_elevation_loss, lineBreak);
+        }
+
         // Recorded time
         builder.append(context.getString(R.string.description_recorded_time, StringUtils.formatDateTime(context, stats.getStartTime_ms())));
         builder.append(lineBreak);

src/main/java/de/dennisguse/opentracks/content/data/Marker.java

@@ -48,6 +48,11 @@ public final class Marker {
     @Deprecated //TODO Make an URI instead of String
     private String photoUrl = "";
 
+    public Marker(@Nullable Track.Id trackId) {
+        this.trackId = trackId;
+        location = null;
+    }
+
     @VisibleForTesting
     public Marker(@NonNull Track.Id trackId, @NonNull TrackPoint trackPoint) {
         this(trackId, trackPoint.getLocation());

src/main/java/de/dennisguse/opentracks/content/data/TrackPoint.java

@@ -33,6 +33,7 @@ public class TrackPoint {
     private Float cyclingCadence_rpm = null;
     private Float power = null;
     private Float elevationGain = null;
+    private Float elevationLoss = null;
 
     public TrackPoint() {
         this.location = new Location("");
@@ -50,6 +51,7 @@ public class TrackPoint {
         this.power = trackPoint.getPower();
 
         this.elevationGain = trackPoint.getElevationGain();
+        this.elevationLoss = trackPoint.getElevationLoss();
     }
 
     public TrackPoint(double latitude, double longitude, Double altitude, long time) {
@@ -107,6 +109,18 @@ public class TrackPoint {
         this.elevationGain = elevationGain;
     }
 
+    public boolean hasElevationLoss() {
+        return elevationLoss != null;
+    }
+
+    public float getElevationLoss() {
+        return elevationLoss;
+    }
+
+    public void setElevationLoss(Float elevationLoss) {
+        this.elevationLoss = elevationLoss;
+    }
+
     public double getLatitude() {
         return location.getLatitude();
     }

src/main/java/de/dennisguse/opentracks/content/data/TrackPointsColumns.java

@@ -54,6 +54,7 @@ public interface TrackPointsColumns extends BaseColumns {
     String SENSOR_CADENCE = "sensor_cadence";
     String SENSOR_POWER = "sensor_power";
     String ELEVATION_GAIN = "elevation_gain";
+    String ELEVATION_LOSS = "elevation_loss";
 
     String CREATE_TABLE = "CREATE TABLE " + TABLE_NAME + " ("
             + _ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
@@ -69,6 +70,7 @@ public interface TrackPointsColumns extends BaseColumns {
             + SENSOR_CADENCE + " FLOAT, "
             + SENSOR_POWER + " FLOAT, "
             + ELEVATION_GAIN + " FLOAT, "
+            + ELEVATION_LOSS + " FLOAT, "
             + "FOREIGN KEY (" + TRACKID + ") REFERENCES " + TracksColumns.TABLE_NAME + "(" + TracksColumns._ID + ") ON UPDATE CASCADE ON DELETE CASCADE"
             + ")";
 

src/main/java/de/dennisguse/opentracks/content/data/TracksColumns.java

@@ -54,6 +54,7 @@ public interface TracksColumns extends BaseColumns {
     String MINELEVATION = "minelevation"; // minimum elevation
     String MAXELEVATION = "maxelevation"; // maximum elevation
     String ELEVATIONGAIN = "elevationgain"; // elevation gain
+    String ELEVATIONLOSS = "elevationloss"; // elevation loss
     String ICON = "icon"; // track activity type icon
 
     String CREATE_TABLE = "CREATE TABLE " + TABLE_NAME + " ("
@@ -74,7 +75,8 @@ public interface TracksColumns extends BaseColumns {
             + MAXELEVATION + " FLOAT, "
             + ELEVATIONGAIN + " FLOAT, "
             + ICON + " TEXT, "
-            + UUID + " BLOB)";
+            + UUID + " BLOB, "
+            + ELEVATIONLOSS + " FLOAT)";
 
     String CREATE_TABLE_INDEX = "CREATE UNIQUE INDEX " + TABLE_NAME + "_" + UUID + "_index ON " + TABLE_NAME + "(" + UUID + ")";
 

src/main/java/de/dennisguse/opentracks/content/provider/CachedTrackPointsIndexes.java

@@ -20,6 +20,7 @@ class CachedTrackPointsIndexes {
     final int sensorCadenceIndex;
     final int sensorPowerIndex;
     final int elevationGainIndex;
+    final int elevationLossIndex;
 
     CachedTrackPointsIndexes(Cursor cursor) {
         idIndex = cursor.getColumnIndex(TrackPointsColumns._ID);
@@ -34,5 +35,6 @@ class CachedTrackPointsIndexes {
         sensorCadenceIndex = cursor.getColumnIndexOrThrow(TrackPointsColumns.SENSOR_CADENCE);
         sensorPowerIndex = cursor.getColumnIndexOrThrow(TrackPointsColumns.SENSOR_POWER);
         elevationGainIndex = cursor.getColumnIndexOrThrow(TrackPointsColumns.ELEVATION_GAIN);
+        elevationLossIndex = cursor.getColumnIndexOrThrow(TrackPointsColumns.ELEVATION_LOSS);
     }
 }

src/main/java/de/dennisguse/opentracks/content/provider/ContentProviderUtils.java

@@ -114,6 +114,7 @@ public class ContentProviderUtils {
         int minElevationIndex = cursor.getColumnIndexOrThrow(TracksColumns.MINELEVATION);
         int maxElevationIndex = cursor.getColumnIndexOrThrow(TracksColumns.MAXELEVATION);
         int elevationGainIndex = cursor.getColumnIndexOrThrow(TracksColumns.ELEVATIONGAIN);
+        int elevationLossIndex = cursor.getColumnIndexOrThrow(TracksColumns.ELEVATIONLOSS);
         int iconIndex = cursor.getColumnIndexOrThrow(TracksColumns.ICON);
 
         Track track = new Track();
@@ -160,6 +161,9 @@ public class ContentProviderUtils {
         if (!cursor.isNull(elevationGainIndex)) {
             trackStatistics.setTotalElevationGain(cursor.getFloat(elevationGainIndex));
         }
+        if (!cursor.isNull(elevationLossIndex)) {
+            trackStatistics.setTotalElevationLoss(cursor.getFloat(elevationLossIndex));
+        }
         if (!cursor.isNull(iconIndex)) {
             track.setIcon(cursor.getString(iconIndex));
         }
@@ -203,7 +207,6 @@ public class ContentProviderUtils {
         contentResolver.delete(MarkerColumns.CONTENT_URI, MarkerColumns.TRACKID + "=?", selectionArgs);
     }
 
-    @VisibleForTesting
     public List<Track> getTracks() {
         ArrayList<Track> tracks = new ArrayList<>();
         try (Cursor cursor = getTrackCursor(null, null, TracksColumns._ID)) {
@@ -217,19 +220,6 @@ public class ContentProviderUtils {
         return tracks;
     }
 
-    @Deprecated
-    //TODO Do not use; rather get the proper TrackId (e.g., resume a track might give you some weird effects).
-    @VisibleForTesting
-    public Track getLastTrack() {
-        try (Cursor cursor = getTrackCursor(null, null, TracksColumns.STARTTIME + " DESC")) {
-            // Using the same order as shown in the track list
-            if (cursor != null && cursor.moveToNext()) {
-                return createTrack(cursor);
-            }
-        }
-        return null;
-    }
-
     /**
      * @param trackId the track id.
      */
@@ -314,6 +304,7 @@ public class ContentProviderUtils {
         values.put(TracksColumns.MINELEVATION, trackStatistics.getMinElevation());
         values.put(TracksColumns.MAXELEVATION, trackStatistics.getMaxElevation());
         values.put(TracksColumns.ELEVATIONGAIN, trackStatistics.getTotalElevationGain());
+        values.put(TracksColumns.ELEVATIONLOSS, trackStatistics.getTotalElevationLoss());
         values.put(TracksColumns.ICON, track.getIcon());
 
         return values;
@@ -488,7 +479,7 @@ public class ContentProviderUtils {
     private void deleteMarkerPhoto(Context context, Marker marker) {
         if (marker != null && marker.hasPhoto()) {
             Uri uri = marker.getPhotoURI();
-            File file = FileUtils.getPhotoFileIfExists(context, marker.getTrackId(), uri);
+            File file = FileUtils.buildInternalPhotoFile(context, marker.getTrackId(), uri);
             if (file.exists()) {
                 File parent = file.getParentFile();
                 file.delete();
@@ -605,6 +596,9 @@ public class ContentProviderUtils {
         if (!cursor.isNull(indexes.elevationGainIndex)) {
             trackPoint.setElevationGain(cursor.getFloat(indexes.elevationGainIndex));
         }
+        if (!cursor.isNull(indexes.elevationLossIndex)) {
+            trackPoint.setElevationLoss(cursor.getFloat(indexes.elevationLossIndex));
+        }
 
         return trackPoint;
     }
@@ -616,7 +610,7 @@ public class ContentProviderUtils {
      * @param trackId     the trackPoints id
      * @return the number of trackPoints inserted
      */
-    //TODO Only used for testing and file import; might be better to replace it.
+    //TODO Only used for testing; might be better to replace it.
     public int bulkInsertTrackPoint(TrackPoint[] trackPoints, Track.Id trackId) {
         ContentValues[] values = new ContentValues[trackPoints.length];
         for (int i = 0; i < values.length; i++) {
@@ -625,6 +619,15 @@ public class ContentProviderUtils {
         return contentResolver.bulkInsert(TrackPointsColumns.CONTENT_URI_BY_ID, values);
     }
 
+    //TODO Only used for file import; might be better to replace it.
+    public int bulkInsertTrackPoint(List<TrackPoint> trackPoints, Track.Id trackId) {
+        ContentValues[] values = new ContentValues[trackPoints.size()];
+        for (int i = 0; i < trackPoints.size(); i++) {
+            values[i] = createContentValues(trackPoints.get(i), trackId);
+        }
+        return contentResolver.bulkInsert(TrackPointsColumns.CONTENT_URI_BY_ID, values);
+    }
+
     /**
      * Gets the first location id for a track.
      * Returns null if it doesn't exist.
@@ -798,6 +801,9 @@ public class ContentProviderUtils {
         if (trackPoint.hasElevationGain()) {
             values.put(TrackPointsColumns.ELEVATION_GAIN, trackPoint.getElevationGain());
         }
+        if (trackPoint.hasElevationLoss()) {
+            values.put(TrackPointsColumns.ELEVATION_LOSS, trackPoint.getElevationLoss());
+        }
 
         return values;
     }

src/main/java/de/dennisguse/opentracks/content/provider/CustomSQLiteOpenHelper.java

@@ -25,7 +25,7 @@ public class CustomSQLiteOpenHelper extends SQLiteOpenHelper {
 
     private static final String TAG = CustomSQLiteOpenHelper.class.getSimpleName();
 
-    private static final int DATABASE_VERSION = 28;
+    private static final int DATABASE_VERSION = 29;
 
     @VisibleForTesting
     public static final String DATABASE_NAME = "database.db";
@@ -76,6 +76,9 @@ public class CustomSQLiteOpenHelper extends SQLiteOpenHelper {
                 case 28:
                     upgradeFrom27to28(db);
                     break;
+                case 29:
+                    upgradeFrom28to29(db);
+                    break;
 
                 default:
                     throw new RuntimeException("Not implemented: upgrade to " + toVersion);
@@ -103,6 +106,9 @@ public class CustomSQLiteOpenHelper extends SQLiteOpenHelper {
                 case 27:
                     downgradeFrom28to27(db);
                     break;
+                case 28:
+                    downgradeFrom29to28(db);
+                    break;
 
                 default:
                     throw new RuntimeException("Not implemented: downgrade to " + toVersion);
@@ -284,4 +290,44 @@ public class CustomSQLiteOpenHelper extends SQLiteOpenHelper {
         db.setTransactionSuccessful();
         db.endTransaction();
     }
+
+    /**
+     * Add elevation loss.
+     */
+    private void upgradeFrom28to29(SQLiteDatabase db) {
+        db.beginTransaction();
+
+        db.execSQL("ALTER TABLE tracks ADD COLUMN elevationloss FLOAT");
+        db.execSQL("ALTER TABLE trackpoints ADD COLUMN elevation_loss FLOAT");
+
+        db.setTransactionSuccessful();
+        db.endTransaction();
+    }
+
+    private void downgradeFrom29to28(SQLiteDatabase db) {
+        db.beginTransaction();
+
+        // Tracks
+        db.execSQL("DROP INDEX tracks_uuid_index");
+
+        db.execSQL("ALTER TABLE tracks RENAME TO tracks_old");
+        db.execSQL("CREATE TABLE tracks (_id INTEGER PRIMARY KEY AUTOINCREMENT, name TEXT, description TEXT, category TEXT, starttime INTEGER, stoptime INTEGER, numpoints INTEGER, totaldistance FLOAT, totaltime INTEGER, movingtime INTEGER, avgspeed FLOAT, avgmovingspeed FLOAT, maxspeed FLOAT, minelevation FLOAT, maxelevation FLOAT, elevationgain FLOAT, icon TEXT, uuid BLOB)");
+        db.execSQL("INSERT INTO tracks SELECT _id, name, description, category, starttime, stoptime, numpoints, totaldistance, totaltime, movingtime, avgspeed, avgmovingspeed, maxspeed, minelevation, maxelevation, elevationgain, icon, uuid FROM tracks_old");
+        db.execSQL("DROP TABLE tracks_old");
+
+        db.execSQL("CREATE UNIQUE INDEX tracks_uuid_index ON tracks(uuid)");
+
+        // TrackPoints
+        db.execSQL("DROP INDEX trackpoints_trackid_index");
+
+        db.execSQL("ALTER TABLE trackpoints RENAME TO trackpoints_old");
+        db.execSQL("CREATE TABLE trackpoints (_id INTEGER PRIMARY KEY AUTOINCREMENT, trackid INTEGER NOT NULL, longitude INTEGER, latitude INTEGER, time INTEGER, elevation FLOAT, accuracy FLOAT, speed FLOAT, bearing FLOAT, sensor_heartrate FLOAT, sensor_cadence FLOAT, sensor_power FLOAT, elevation_gain FLOAT, FOREIGN KEY (trackid) REFERENCES tracks(_id) ON UPDATE CASCADE ON DELETE CASCADE)");
+        db.execSQL("INSERT INTO trackpoints SELECT _id, trackid, longitude, latitude, time, elevation, accuracy, speed, bearing, sensor_heartrate, sensor_cadence, sensor_power, elevation_gain FROM trackpoints_old");
+        db.execSQL("DROP TABLE trackpoints_old");
+
+        db.execSQL("CREATE INDEX trackpoints_trackid_index ON trackpoints(trackid)");
+
+        db.setTransactionSuccessful();
+        db.endTransaction();
+    }
 }

src/main/java/de/dennisguse/opentracks/fragments/ChooseActivityTypeDialogFragment.java

@@ -58,7 +58,7 @@ public class ChooseActivityTypeDialogFragment extends DialogFragment implements
     }
 
     @Override
-    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+    public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
         viewBinding = ChooseActivityTypeBinding.inflate(inflater, container, false);
 
         List<Integer> imageIds = new ArrayList<>();

src/main/java/de/dennisguse/opentracks/fragments/IntervalsFragment.java

@@ -40,7 +40,7 @@ public class IntervalsFragment extends Fragment implements TrackDataListener {
     protected IntervalStatisticsAdapter.StackMode stackModeListView;
     private IntervalStatisticsModel.IntervalOption selectedInterval;
 
-    private String intervalUnit;
+    private boolean metricUnits;
     private IntervalStatisticsAdapter adapter;
     private ArrayAdapter<IntervalStatisticsModel.IntervalOption> spinnerAdapter;
 
@@ -51,7 +51,7 @@ public class IntervalsFragment extends Fragment implements TrackDataListener {
 
     protected final SharedPreferences.OnSharedPreferenceChangeListener sharedPreferenceChangeListener = (preferences, key) -> {
         if (PreferencesUtils.isKey(getContext(), R.string.stats_units_key, key) || PreferencesUtils.isKey(getContext(), R.string.stats_rate_key, key)) {
-            intervalUnit = PreferencesUtils.isMetricUnits(getContext()) ? getContext().getString(R.string.unit_kilometer) : getContext().getString(R.string.unit_mile);
+            metricUnits = PreferencesUtils.isMetricUnits(getContext());
             if (adapter != null) {
                 adapter.notifyDataSetChanged();
                 spinnerAdapter.notifyDataSetChanged();
@@ -74,7 +74,7 @@ public class IntervalsFragment extends Fragment implements TrackDataListener {
         super.onViewCreated(view, savedInstanceState);
 
         PreferencesUtils.register(getContext(), sharedPreferenceChangeListener);
-        intervalUnit = PreferencesUtils.isMetricUnits(getContext()) ? getContext().getString(R.string.unit_kilometer) : getContext().getString(R.string.unit_mile);
+        metricUnits = PreferencesUtils.isMetricUnits(getContext());
 
         viewBinding.intervalList.setEmptyView(viewBinding.intervalListEmptyView);
 
@@ -87,15 +87,17 @@ public class IntervalsFragment extends Fragment implements TrackDataListener {
             @Override
             public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
                 TextView v = (TextView) super.getView(position, convertView, parent);
-                v.setText(v.getText() + " " + intervalUnit);
+                if (metricUnits) {
+                    v.setText(getContext().getString(R.string.value_integer_kilometer, Integer.parseInt(v.getText().toString())));
+                } else {
+                    v.setText(getContext().getString(R.string.value_integer_mile, Integer.parseInt(v.getText().toString())));
+                }
                 return v;
             }
 
             @Override
             public View getDropDownView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
-                TextView v = (TextView) super.getDropDownView(position, convertView, parent);
-                v.setText(v.getText() + " " + intervalUnit);
-                return v;
+                return getView(position, convertView, parent);
             }
         };
 
@@ -149,7 +151,6 @@ public class IntervalsFragment extends Fragment implements TrackDataListener {
             return;
         }
 
-        boolean metricUnits = PreferencesUtils.isMetricUnits(getContext());
         IntervalStatistics intervalStatistics = viewModel.getIntervalStats(metricUnits, selectedInterval);
         adapter = new IntervalStatisticsAdapter(getContext(), intervalStatistics.getIntervalList(), category, stackModeListView);
         viewBinding.intervalList.setAdapter(adapter);

src/main/java/de/dennisguse/opentracks/fragments/MarkerDetailFragment.java

@@ -62,6 +62,8 @@ public class MarkerDetailFragment extends Fragment {
 
     private ContentProviderUtils contentProviderUtils;
     private Handler handler;
+
+    private Marker.Id markerId;
     private Marker marker;
 
     private MarkerDetailFragmentBinding viewBinding;
@@ -104,7 +106,7 @@ public class MarkerDetailFragment extends Fragment {
     public void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
-        Marker.Id markerId = getArguments().getParcelable(KEY_MARKER_ID);
+        markerId = getArguments().getParcelable(KEY_MARKER_ID);
         if (markerId == null) {
             Log.d(TAG, "invalid marker id");
             getParentFragmentManager().popBackStack();
@@ -153,6 +155,13 @@ public class MarkerDetailFragment extends Fragment {
         viewBinding = null;
     }
 
+    @Override
+    public void onDestroy() {
+        super.onDestroy();
+        markerId = null;
+        marker = null;
+    }
+
     @Override
     public void setMenuVisibility(boolean menuVisible) {
         super.setMenuVisibility(menuVisible);
@@ -182,36 +191,40 @@ public class MarkerDetailFragment extends Fragment {
 
     @Override
     public boolean onOptionsItemSelected(MenuItem item) {
-        Marker.Id markerId = getArguments().getParcelable(KEY_MARKER_ID); //TODO Should only happen in onCreate?
         FragmentActivity fragmentActivity = getActivity();
-        Intent intent;
-        switch (item.getItemId()) {
-            case R.id.marker_detail_show_on_map:
-                IntentUtils.showCoordinateOnMap(getContext(), marker);
-                return true;
-            case R.id.marker_detail_edit:
-                intent = IntentUtils.newIntent(fragmentActivity, MarkerEditActivity.class)
-                        .putExtra(MarkerEditActivity.EXTRA_MARKER_ID, markerId);
-                startActivity(intent);
-                return true;
-            case R.id.marker_detail_share:
-                if (marker.hasPhoto()) {
-                    intent = IntentUtils.newShareImageIntent(getContext(), marker.getPhotoURI());
-                    intent = Intent.createChooser(intent, null);
-                    startActivity(intent);
-                }
-                return true;
-            case R.id.marker_detail_delete:
-                DeleteMarkerDialogFragment.showDialog(getChildFragmentManager(), markerId);
-                return true;
-            default:
-                return super.onOptionsItemSelected(item);
+
+        if (item.getItemId() == R.id.marker_detail_show_on_map) {
+            IntentUtils.showCoordinateOnMap(getContext(), marker);
+            return true;
         }
+
+        if (item.getItemId() == R.id.marker_detail_edit) {
+            Intent intent = IntentUtils.newIntent(fragmentActivity, MarkerEditActivity.class)
+                    .putExtra(MarkerEditActivity.EXTRA_MARKER_ID, markerId);
+            startActivity(intent);
+            return true;
+        }
+
+        if (item.getItemId() == R.id.marker_detail_share) {
+            if (marker.hasPhoto()) {
+                Intent intent = IntentUtils.newShareFileIntent(getContext(), marker.getId());
+                intent = Intent.createChooser(intent, null);
+                startActivity(intent);
+            }
+            return true;
+        }
+
+        if (item.getItemId() == R.id.marker_detail_delete) {
+            DeleteMarkerDialogFragment.showDialog(getChildFragmentManager(), markerId);
+            return true;
+        }
+
+        return super.onOptionsItemSelected(item);
     }
 
     private void updateMarker(boolean refresh) {
         if (refresh || marker == null) {
-            marker = contentProviderUtils.getMarker(getArguments().getParcelable(KEY_MARKER_ID)); //TODO Should only happen in onCreate?
+            marker = contentProviderUtils.getMarker(markerId);
             if (marker == null) {
                 Log.d(TAG, "marker is null");
                 getParentFragmentManager().popBackStack();

src/main/java/de/dennisguse/opentracks/fragments/StatisticsRecordedFragment.java

@@ -135,7 +135,6 @@ public class StatisticsRecordedFragment extends Fragment {
         // Set activity type
         {
             String trackIconValue = TrackIconUtils.getIconValue(getContext(), category);
-            viewBinding.statsActivityTypeIcon.setEnabled(false);
             viewBinding.statsActivityTypeIcon.setImageDrawable(ContextCompat.getDrawable(getContext(), TrackIconUtils.getIconDrawable(trackIconValue)));
         }
 
@@ -177,17 +176,24 @@ public class StatisticsRecordedFragment extends Fragment {
             viewBinding.statsMovingSpeedUnit.setText(parts.second);
         }
 
-        // Set elevation gain
+        // Set elevation gain and loss
         {
             // Make elevation visible?
             boolean showElevation = PreferencesUtils.isShowStatsElevation(getContext());
             viewBinding.statsElevationGroup.setVisibility(showElevation ? View.VISIBLE : View.GONE);
 
             Float elevationGain_m = trackStatistics != null ? trackStatistics.getTotalElevationGain() : null;
+            Float elevationLoss_m = trackStatistics != null ? trackStatistics.getTotalElevationLoss() : null;
 
-            Pair<String, String> parts = StringUtils.formatElevation(getContext(), elevationGain_m, metricUnits);
+            Pair<String, String> parts;
+
+            parts = StringUtils.formatElevation(getContext(), elevationGain_m, metricUnits);
             viewBinding.statsElevationGainValue.setText(parts.first);
             viewBinding.statsElevationGainUnit.setText(parts.second);
+
+            parts = StringUtils.formatElevation(getContext(), elevationLoss_m, metricUnits);
+            viewBinding.statsElevationLossValue.setText(parts.first);
+            viewBinding.statsElevationLossUnit.setText(parts.second);
         }
     }
 }

src/main/java/de/dennisguse/opentracks/fragments/StatisticsRecordingFragment.java

@@ -65,7 +65,6 @@ public class StatisticsRecordingFragment extends Fragment implements TrackDataLi
     private StatisticsRecordingBinding viewBinding;
 
     private SensorsAdapter sensorsAdapter;
-    private RecyclerView sensorsRecyclerView;
 
     public static Fragment newInstance() {
         return new StatisticsRecordingFragment();
@@ -112,7 +111,7 @@ public class StatisticsRecordingFragment extends Fragment implements TrackDataLi
         viewBinding.statsActivityTypeIcon.setOnClickListener(v -> ((TrackRecordingActivity) getActivity()).chooseActivityType(category));
 
         sensorsAdapter = new SensorsAdapter(getContext());
-        sensorsRecyclerView = viewBinding.statsSensorsRecyclerView;
+        RecyclerView sensorsRecyclerView = viewBinding.statsSensorsRecyclerView;
         sensorsRecyclerView.setLayoutManager(new GridLayoutManager(getContext(), 2));
         sensorsRecyclerView.setAdapter(sensorsAdapter);
     }
@@ -262,7 +261,7 @@ public class StatisticsRecordingFragment extends Fragment implements TrackDataLi
 
     /**
      * Tries to fetch most recent {@link SensorDataSet} from {@link de.dennisguse.opentracks.services.TrackRecordingService}.
-     * Also sets elevation gain.
+     * Also sets elevation gain and loss.
      */
     private void updateSensorDataUI() {
         TrackRecordingServiceInterface trackRecordingService = trackRecordingServiceConnection.getServiceIfBound();
@@ -285,13 +284,14 @@ public class StatisticsRecordingFragment extends Fragment implements TrackDataLi
                 sensorsAdapter.swapData(sensorDataList);
                 setSpeedSensorData(sensorDataSet);
             }
+            //TODO Check if we can distribute the total elevation gain and loss via trackStatistics instead of doing some computation in the UI layer.
             setTotalElevationGain(trackRecordingService.getElevationGain_m());
+            setTotalElevationLoss(trackRecordingService.getElevationLoss_m());
         }
     }
 
     // Set elevation gain
     private void setTotalElevationGain(Float elevationGain_m) {
-        //TODO Check if we can distribute the total elevation gain via trackStatistics instead of doing some computation in the UI layer.
         boolean metricUnits = PreferencesUtils.isMetricUnits(getContext());
 
         Float totalElevationGain = elevationGain_m;
@@ -309,6 +309,25 @@ public class StatisticsRecordingFragment extends Fragment implements TrackDataLi
         viewBinding.statsElevationGainUnit.setText(parts.second);
     }
 
+    // Set elevation loss
+    private void setTotalElevationLoss(Float elevationLoss_m) {
+        boolean metricUnits = PreferencesUtils.isMetricUnits(getContext());
+
+        Float totalElevationLoss = elevationLoss_m;
+
+        if (lastTrackStatistics != null && lastTrackStatistics.hasTotalElevationLoss()) {
+            if (elevationLoss_m == null) {
+                totalElevationLoss = lastTrackStatistics.getTotalElevationLoss();
+            } else {
+                totalElevationLoss += lastTrackStatistics.getTotalElevationLoss();
+            }
+        }
+
+        Pair<String, String> parts = StringUtils.formatElevation(getContext(), totalElevationLoss, metricUnits);
+        viewBinding.statsElevationLossValue.setText(parts.first);
+        viewBinding.statsElevationLossUnit.setText(parts.second);
+    }
+
     private void setSpeedSensorData(SensorDataSet sensorDataSet) {
         if (sensorDataSet != null && sensorDataSet.getCyclingSpeed() != null) {
             SensorDataCycling.Speed data = sensorDataSet.getCyclingSpeed();
@@ -379,7 +398,7 @@ public class StatisticsRecordingFragment extends Fragment implements TrackDataLi
             viewBinding.statsMovingSpeedUnit.setText(parts.second);
         }
 
-        // Set elevation (gain)
+        // Set elevation gain and loss
         {
             // Make elevation visible?
             boolean showElevation = PreferencesUtils.isShowStatsElevation(getContext());

src/main/java/de/dennisguse/opentracks/io/file/ErrorListDialog.java

@@ -54,14 +54,14 @@ public class ErrorListDialog extends DialogFragment {
         outState.putStringArrayList(EXTRA_ERROR_LIST, errorList);
     }
 
+    @NonNull
     @Override
     public Dialog onCreateDialog(Bundle savedInstanceState) {
-        final String[] tracks = errorList.stream().toArray(String[]::new);
+        final String[] tracks = errorList.toArray(new String[0]);
         AlertDialog.Builder alertDialogBuilder = new AlertDialog.Builder(getActivity())
                 .setTitle(title)
                 .setItems(tracks, null)
                 .setPositiveButton(R.string.generic_ok, (dialog, which) -> dismiss());
-        AlertDialog dialog = alertDialogBuilder.create();
-        return dialog;
+        return alertDialogBuilder.create();
     }
 }

src/main/java/de/dennisguse/opentracks/io/file/exporter/ExportActivity.java

@@ -72,7 +72,6 @@ public class ExportActivity extends FragmentActivity implements ExportServiceRes
 
     private ExportServiceResultReceiver resultReceiver;
 
-    private String directoryDisplayName;
     private List<String> directoryFiles;
 
     private int trackExportSuccessCount;
@@ -143,7 +142,7 @@ public class ExportActivity extends FragmentActivity implements ExportServiceRes
         contentProviderUtils = new ContentProviderUtils(this);
 
         DocumentFile documentFile = DocumentFile.fromTreeUri(this, directoryUri);
-        directoryDisplayName = FileUtils.getPath(documentFile);
+        String directoryDisplayName = FileUtils.getPath(documentFile);
 
         viewBinding.toolbar.toolbar.setTitle(getString(R.string.export_progress_message, directoryDisplayName));
 
@@ -360,7 +359,7 @@ public class ExportActivity extends FragmentActivity implements ExportServiceRes
         public boolean resolve() {
             if (autoConflict == CONFLICT_NONE) {
                 Track track = contentProviderUtils.getTrack(trackId);
-                viewBinding.exportProgressAlertIcon.setImageDrawable(getDrawable(R.drawable.ic_report_problem_24));
+                viewBinding.exportProgressAlertIcon.setImageDrawable(ContextCompat.getDrawable(ExportActivity.this, R.drawable.ic_report_problem_24));
                 viewBinding.exportProgressAlertMsg.setText(getString(R.string.export_track_already_exists_msg, track.getName()));
                 setConflictVisibility(View.VISIBLE);
                 return false;

src/main/java/de/dennisguse/opentracks/io/file/exporter/GpxTrackWriter.java

@@ -197,10 +197,9 @@ public class GpxTrackWriter implements TrackWriter {
 
             printWriter.println("<time>" + StringUtils.formatDateTimeIso8601(trackPoint.getTime()) + "</time>");
 
-            if (trackPoint.hasSpeed() || trackPoint.hasHeartRate() || trackPoint.hasCyclingCadence()) {
+            if (trackPoint.hasSpeed() || trackPoint.hasHeartRate() || trackPoint.hasCyclingCadence() || trackPoint.hasElevationGain() || trackPoint.hasElevationLoss()) {
                 printWriter.println("<extensions><gpxtpx:TrackPointExtension>");
 
-
                 if (trackPoint.hasSpeed()) {
                     printWriter.println("<gpxtpx:speed>" + SPEED_FORMAT.format(trackPoint.getSpeed()) + "</gpxtpx:speed>");
                 }
@@ -213,6 +212,14 @@ public class GpxTrackWriter implements TrackWriter {
                     printWriter.println("<gpxtpx:cad>" + HEARTRATE_FORMAT.format(trackPoint.getCyclingCadence_rpm()) + "</gpxtpx:cad>");
                 }
 
+                if (trackPoint.hasElevationGain()) {
+                    printWriter.println("<opentracks:gain>" + ELEVATION_FORMAT.format(trackPoint.getElevationGain()) + "</opentracks:gain>");
+                }
+
+                if (trackPoint.hasElevationLoss()) {
+                    printWriter.println("<opentracks:loss>" + ELEVATION_FORMAT.format(trackPoint.getElevationLoss()) + "</opentracks:loss>");
+                }
+
                 printWriter.println("</gpxtpx:TrackPointExtension></extensions>");
             }
 

src/main/java/de/dennisguse/opentracks/io/file/exporter/KmlTrackWriter.java

@@ -51,6 +51,7 @@ public class KmlTrackWriter implements TrackWriter {
     public static final String EXTENDED_DATA_TYPE_HEART_RATE = "heart_rate";
     public static final String EXTENDED_DATA_TYPE_POWER = "power";
     public static final String EXTENDED_DATA_TYPE_ELEVATION_GAIN = "elevation_gain";
+    public static final String EXTENDED_DATA_TYPE_ELEVATION_LOSS = "elevation_loss";
 
     private static final String MARKER_ICON = "http://maps.google.com/mapfiles/kml/pushpin/blue-pushpin.png";
     private static final String START_ICON = "http://maps.google.com/mapfiles/kml/paddle/grn-circle.png";
@@ -70,6 +71,7 @@ public class KmlTrackWriter implements TrackWriter {
     private final List<Float> cadenceList = new ArrayList<>();
     private final List<Float> heartRateList = new ArrayList<>();
     private final List<Float> elevationGainList = new ArrayList<>();
+    private final List<Float> elevationLossList = new ArrayList<>();
 
     private TrackPoint startTrackPoint;
 
@@ -167,7 +169,7 @@ public class KmlTrackWriter implements TrackWriter {
     @Override
     public void writeMarker(Marker marker) {
         if (printWriter != null && exportTrackDetail) {
-            boolean existsPhoto = FileUtils.getPhotoFileIfExists(context, marker.getTrackId(), marker.getPhotoURI()) != null;
+            boolean existsPhoto = FileUtils.buildInternalPhotoFile(context, marker.getTrackId(), marker.getPhotoURI()) != null;
             if (marker.hasPhoto() && exportPhotos && existsPhoto) {
                 float heading = getHeading(marker.getTrackId(), marker.getLocation());
                 writePhotoOverlay(marker, heading);
@@ -262,6 +264,9 @@ public class KmlTrackWriter implements TrackWriter {
                 if (elevationGainList.size() > 0) {
                     writeSimpleArrayData(elevationGainList, EXTENDED_DATA_TYPE_ELEVATION_GAIN);
                 }
+                if (elevationLossList.size() > 0) {
+                    writeSimpleArrayData(elevationLossList, EXTENDED_DATA_TYPE_ELEVATION_LOSS);
+                }
             }
             printWriter.println("</SchemaData>");
             printWriter.println("</ExtendedData>");
@@ -295,6 +300,9 @@ public class KmlTrackWriter implements TrackWriter {
                 if (trackPoint.hasElevationGain()) {
                     elevationGainList.add(trackPoint.getElevationGain());
                 }
+                if (trackPoint.hasElevationLoss()) {
+                    elevationLossList.add(trackPoint.getElevationLoss());
+                }
             }
         }
     }

src/main/java/de/dennisguse/opentracks/io/file/exporter/KmzTrackExporter.java

@@ -53,7 +53,7 @@ public class KmzTrackExporter implements TrackExporter {
     private final FileTrackExporter fileTrackExporter;
 
     private final boolean exportPhotos;
-    private Context context;
+    private final Context context;
 
     /**
      * Constructor.
@@ -108,7 +108,7 @@ public class KmzTrackExporter implements TrackExporter {
                         Marker marker = contentProviderUtils.createMarker(cursor);
                         if (marker.hasPhoto()) {
                             Uri uriPhoto = marker.getPhotoURI();
-                            boolean existsPhoto = FileUtils.getPhotoFileIfExists(context, track.getId(), uriPhoto) != null;
+                            boolean existsPhoto = FileUtils.buildInternalPhotoFile(context, track.getId(), uriPhoto) != null;
                             if (existsPhoto) {
                                 addImage(context, zipOutputStream, uriPhoto, marker);
                             }

src/main/java/de/dennisguse/opentracks/io/file/importer/AbstractFileTrackImporter.java

@@ -29,7 +29,6 @@ import java.io.File;
 import java.io.IOException;
 import java.io.InputStream;
 import java.util.ArrayList;
-import java.util.Arrays;
 import java.util.List;
 import java.util.Locale;
 import java.util.UUID;
@@ -61,9 +60,6 @@ abstract class AbstractFileTrackImporter extends DefaultHandler implements Track
 
     private static final String TAG = AbstractFileTrackImporter.class.getSimpleName();
 
-    // The maximum number of buffered locations for bulk-insertion
-    private static final int MAX_BUFFERED_LOCATIONS = 512;
-
     private final Context context;
     private final ContentProviderUtils contentProviderUtils;
     private final int recordingDistanceInterval;
@@ -90,6 +86,8 @@ abstract class AbstractFileTrackImporter extends DefaultHandler implements Track
     protected String markerType;
     protected String photoUrl;
     protected String uuid;
+    protected String gain;
+    protected String loss;
 
     // The current track data
     private TrackData trackData;
@@ -127,18 +125,15 @@ abstract class AbstractFileTrackImporter extends DefaultHandler implements Track
 
             saxParser.parse(inputStream, this);
             Log.d(TAG, "Total import time: " + (System.currentTimeMillis() - start) + "ms");
-            if (trackIds.size() != 1) {
-                // TODO Multi track is not supported yet.
-                throw new ImportParserException("Multi track not supported");
-            }
             return trackIds.get(0);
         } catch (IOException | SAXException | ParserConfigurationException e) {
             Log.e(TAG, "Unable to import file", e);
-            cleanImport();
+            if (trackIds.size() > 0) {
+                cleanImport();
+            }
             throw new ImportParserException(e);
         } catch (SQLiteConstraintException e) {
             Log.e(TAG, "Unable to import file", e);
-            cleanImport();
             throw new ImportAlreadyExistsException(e);
         }
     }
@@ -228,17 +223,12 @@ abstract class AbstractFileTrackImporter extends DefaultHandler implements Track
      */
     protected void onTrackStart() throws SAXException {
         trackData = new TrackData();
-        Uri uri = contentProviderUtils.insertTrack(trackData.track);
-        Track.Id trackId = new Track.Id(Long.parseLong(uri.getLastPathSegment()));
-        trackIds.add(trackId);
-        trackData.track.setId(trackId);
     }
 
     /**
      * On track end.
      */
     protected void onTrackEnd() {
-        flushLocations(trackData);
         if (name != null) {
             trackData.track.setName(name);
         }
@@ -268,17 +258,27 @@ abstract class AbstractFileTrackImporter extends DefaultHandler implements Track
         }
         trackData.track.setTrackStatistics(trackData.trackStatisticsUpdater.getTrackStatistics());
 
-        try {
-            contentProviderUtils.updateTrack(trackData.track);
-        } catch (SQLiteConstraintException e) {
+        Track track = contentProviderUtils.getTrack(trackData.track.getUuid());
+        if (track != null) {
             if (PreferencesUtils.getPreventReimportTracks(context)) {
-                throw e;
+                throw new ImportAlreadyExistsException(context.getString(R.string.import_prevent_reimport));
             }
 
             //TODO This is a workaround until we have proper UI.
             trackData.track.setUuid(UUID.randomUUID());
-            contentProviderUtils.updateTrack(trackData.track);
         }
+
+        if (trackIds.size() > 0) {
+            // TODO Multi track is not supported yet.
+            cleanImport();
+            throw new ImportParserException("Multi track not supported");
+        }
+        Uri uri = contentProviderUtils.insertTrack(trackData.track);
+        Track.Id trackId = new Track.Id(Long.parseLong(uri.getLastPathSegment()));
+        trackIds.add(trackId);
+        trackData.track.setId(trackId);
+
+        flushLocations(trackData);
     }
 
     /**
@@ -303,7 +303,8 @@ abstract class AbstractFileTrackImporter extends DefaultHandler implements Track
         TrackPoint trackPoint = createTrackPoint();
 
         if (!LocationUtils.isValidLocation(trackPoint.getLocation())) {
-            throw new SAXException(createErrorMessage("Invalid location detected: " + trackPoint));
+            Log.w(TAG, "Marker with invalid coordinates ignored: " + trackPoint.getLocation());
+            return;
         }
         Marker marker = new Marker(trackPoint.getLocation());
 
@@ -468,6 +469,21 @@ abstract class AbstractFileTrackImporter extends DefaultHandler implements Track
             }
         }
 
+        if (gain != null) {
+            try {
+                trackPoint.setElevationGain(Float.parseFloat(gain));
+            } catch (Exception e) {
+                throw new SAXException(createErrorMessage(String.format(Locale.US, "Unable to parse elevation gain: %s", gain)), e);
+            }
+        }
+        if (loss != null) {
+            try {
+                trackPoint.setElevationLoss(Float.parseFloat(loss));
+            } catch (Exception e) {
+                throw new SAXException(createErrorMessage(String.format(Locale.US, "Unable to parse elevation loss: %s", loss)), e);
+            }
+        }
+
         return trackPoint;
     }
 
@@ -482,13 +498,9 @@ abstract class AbstractFileTrackImporter extends DefaultHandler implements Track
         }
         trackData.trackStatisticsUpdater.addTrackPoint(trackPoint, recordingDistanceInterval);
 
-        trackData.bufferedTrackPoints[trackData.numBufferedTrackPoints] = trackPoint;
+        trackData.bufferedTrackPoints.add(trackPoint);
         trackData.numBufferedTrackPoints++;
         trackData.numberOfLocations++;
-
-        if (trackData.numBufferedTrackPoints >= MAX_BUFFERED_LOCATIONS) {
-            flushLocations(trackData);
-        }
     }
 
     /**
@@ -500,7 +512,7 @@ abstract class AbstractFileTrackImporter extends DefaultHandler implements Track
         if (data.numBufferedTrackPoints <= 0) {
             return;
         }
-        contentProviderUtils.bulkInsertTrackPoint(Arrays.copyOfRange(data.bufferedTrackPoints, 0, data.numBufferedTrackPoints), data.track.getId());
+        contentProviderUtils.bulkInsertTrackPoint(data.bufferedTrackPoints, data.track.getId());
         data.numBufferedTrackPoints = 0;
     }
 
@@ -537,7 +549,7 @@ abstract class AbstractFileTrackImporter extends DefaultHandler implements Track
         final long importTime = System.currentTimeMillis();
 
         // The buffered locations
-        final TrackPoint[] bufferedTrackPoints = new TrackPoint[MAX_BUFFERED_LOCATIONS];
+        final List<TrackPoint> bufferedTrackPoints = new ArrayList<>();
 
         // The number of buffered locations
         int numBufferedTrackPoints = 0;

src/main/java/de/dennisguse/opentracks/io/file/importer/GpxFileTrackImporter.java

@@ -54,6 +54,9 @@ public class GpxFileTrackImporter extends AbstractFileTrackImporter {
     private static final String TAG_EXTENSION_HEARTRATE = "gpxtpx:hr";
     private static final String TAG_EXTENSION_CADENCE = "gpxtpx:cad";
 
+    private static final String TAG_EXTENSION_GAIN = "opentracks:gain";
+    private static final String TAG_EXTENSION_LOSS = "opentracks:loss";
+
     /**
      * Constructor.
      *
@@ -151,6 +154,16 @@ public class GpxFileTrackImporter extends AbstractFileTrackImporter {
                     uuid = content.trim();
                 }
                 break;
+            case TAG_EXTENSION_GAIN:
+                if (content != null) {
+                    gain = content.trim();
+                }
+                break;
+            case TAG_EXTENSION_LOSS:
+                if (content != null) {
+                    loss = content.trim();
+                }
+                break;
         }
 
         // Reset element content
@@ -176,6 +189,8 @@ public class GpxFileTrackImporter extends AbstractFileTrackImporter {
         altitude = null;
         time = null;
         speed = null;
+        gain = null;
+        loss = null;
     }
 
     /**

src/main/java/de/dennisguse/opentracks/io/file/importer/ImportActivity.java

@@ -24,6 +24,7 @@ import android.widget.Toast;
 
 import androidx.annotation.NonNull;
 import androidx.appcompat.widget.Toolbar;
+import androidx.core.content.ContextCompat;
 import androidx.documentfile.provider.DocumentFile;
 import androidx.fragment.app.FragmentActivity;
 import androidx.lifecycle.ViewModelProvider;
@@ -161,12 +162,12 @@ public class ImportActivity extends FragmentActivity {
             viewBinding.importProgressLeftButton.setVisibility(View.VISIBLE);
             viewBinding.importProgressLeftButton.setText(getString(R.string.generic_show_errors));
             viewBinding.importProgressLeftButton.setOnClickListener((view) -> ErrorListDialog.showDialog(getSupportFragmentManager(), getString(R.string.import_error_list_dialog_title), summary.getFileErrors()));
-            viewBinding.importProgressAlertIcon.setImageDrawable(getDrawable(R.drawable.ic_report_problem_24));
+            viewBinding.importProgressAlertIcon.setImageDrawable(ContextCompat.getDrawable(this, R.drawable.ic_report_problem_24));
             String msg = getResources().getQuantityString(R.plurals.generic_completed_with_errors, summary.getErrorCount(), summary.getErrorCount());
             viewBinding.importProgressAlertMsg.setText(msg);
         } else {
             viewBinding.importProgressLeftButton.setVisibility(View.GONE);
-            viewBinding.importProgressAlertIcon.setImageDrawable(getDrawable(R.drawable.ic_dialog_success_24dp));
+            viewBinding.importProgressAlertIcon.setImageDrawable(ContextCompat.getDrawable(this, R.drawable.ic_dialog_success_24dp));
             viewBinding.importProgressAlertMsg.setText(getString(R.string.generic_completed));
         }
     }

src/main/java/de/dennisguse/opentracks/io/file/importer/ImportAlreadyExistsException.java

@@ -4,4 +4,8 @@ class ImportAlreadyExistsException extends RuntimeException {
     public ImportAlreadyExistsException(Exception e) {
         super(e);
     }
+
+    public ImportAlreadyExistsException(String msg) {
+        super(msg);
+    }
 }

src/main/java/de/dennisguse/opentracks/io/file/importer/KmlFileTrackImporter.java

@@ -63,12 +63,13 @@ public class KmlFileTrackImporter extends AbstractFileTrackImporter {
 
     private boolean trackStarted = false;
     private String extendedDataType;
-    private ArrayList<TrackPoint> trackPoints = new ArrayList<>();
-    private ArrayList<Float> speedList = new ArrayList<>();
-    private ArrayList<Float> cadenceList = new ArrayList<>();
-    private ArrayList<Float> heartRateList = new ArrayList<>();
-    private ArrayList<Float> powerList = new ArrayList<>();
-    private ArrayList<Float> elevationGainList = new ArrayList<>();
+    private final ArrayList<TrackPoint> trackPoints = new ArrayList<>();
+    private final ArrayList<Float> speedList = new ArrayList<>();
+    private final ArrayList<Float> cadenceList = new ArrayList<>();
+    private final ArrayList<Float> heartRateList = new ArrayList<>();
+    private final ArrayList<Float> powerList = new ArrayList<>();
+    private final ArrayList<Float> elevationGainList = new ArrayList<>();
+    private final ArrayList<Float> elevationLossList = new ArrayList<>();
 
     public KmlFileTrackImporter(Context context) {
         this(context, new ContentProviderUtils(context));
@@ -217,6 +218,7 @@ public class KmlFileTrackImporter extends AbstractFileTrackImporter {
         cadenceList.clear();
         powerList.clear();
         elevationGainList.clear();
+        elevationLossList.clear();
     }
 
     /**
@@ -242,6 +244,9 @@ public class KmlFileTrackImporter extends AbstractFileTrackImporter {
             if (i < elevationGainList.size()) {
                 trackPoint.setElevationGain(elevationGainList.get(i));
             }
+            if (i < elevationLossList.size()) {
+                trackPoint.setElevationLoss(elevationLossList.get(i));
+            }
 
             insertTrackPoint(trackPoint);
         }
@@ -311,6 +316,9 @@ public class KmlFileTrackImporter extends AbstractFileTrackImporter {
             case KmlTrackWriter.EXTENDED_DATA_TYPE_ELEVATION_GAIN:
                 elevationGainList.add(value);
                 break;
+            case KmlTrackWriter.EXTENDED_DATA_TYPE_ELEVATION_LOSS:
+                elevationLossList.add(value);
+                break;
             default:
                 Log.w(TAG, "Data from extended data " + extendedDataType + " is not (yet) supported.");
         }

src/main/java/de/dennisguse/opentracks/io/file/importer/KmzTrackImporter.java

@@ -171,12 +171,16 @@ public class KmzTrackImporter implements TrackImporter {
                     trackId = parseKml(zipInputStream);
                     if (trackId == null) {
                         Log.d(TAG, "Unable to parse kml in kmz");
-                        throw new RuntimeException(context.getString(R.string.import_unable_to_import_file, fileName));
+                        throw new ImportParserException(context.getString(R.string.import_unable_to_import_file, fileName));
                     }
                 }
 
                 zipInputStream.closeEntry();
             }
+            if (trackId == null) {
+                Log.d(TAG, "Unable to find doc.kml in kmz");
+                throw new ImportParserException(context.getString(R.string.import_no_kml_file_found));
+            }
             return trackId;
         } catch (ImportParserException | ImportAlreadyExistsException e) {
             Log.e(TAG, "Unable to import file", e);
@@ -271,6 +275,7 @@ public class KmzTrackImporter implements TrackImporter {
      * Reads an image file (zipInputStream) and save it in a file called fileName inside photo folder.
      *
      * @param zipInputStream the zip input stream
+     * @param trackId        the track's id which image belongs to.
      * @param fileName       the file name
      */
     private void readAndSaveImageFile(ZipInputStream zipInputStream, Track.Id trackId, String fileName) throws IOException {

src/main/java/de/dennisguse/opentracks/services/TrackRecordingService.java

@@ -665,6 +665,7 @@ public class TrackRecordingService extends Service implements HandlerServer.Hand
         try {
             if (elevationSumManager != null) {
                 trackPoint.setElevationGain(elevationSumManager.getElevationGain_m());
+                trackPoint.setElevationLoss(elevationSumManager.getElevationLoss_m());
                 elevationSumManager.reset();
             }
             contentProviderUtils.insertTrackPoint(trackPoint, track.getId());
@@ -680,7 +681,6 @@ public class TrackRecordingService extends Service implements HandlerServer.Hand
         voiceExecutor.update();
     }
 
-
     /**
      * Updates the recording track time.
      *
@@ -718,6 +718,17 @@ public class TrackRecordingService extends Service implements HandlerServer.Hand
         return elevationSumManager.getElevationGain_m();
     }
 
+    /**
+     * Returns the relative elevation loss (since last trackpoint).
+     */
+    Float getElevationLoss_m() {
+        if (elevationSumManager == null || !elevationSumManager.isConnected()) {
+            return null;
+        }
+
+        return elevationSumManager.getElevationLoss_m();
+    }
+
     private void showNotification(boolean isGpsStarted) {
         if (isRecording()) {
             Intent intent = IntentUtils.newIntent(this, TrackRecordingActivity.class)

src/main/java/de/dennisguse/opentracks/services/TrackRecordingServiceBinder.java

@@ -104,6 +104,11 @@ class TrackRecordingServiceBinder extends android.os.Binder implements TrackReco
         return trackRecordingService.getElevationGain_m();
     }
 
+    @Override
+    public Float getElevationLoss_m() {
+        return trackRecordingService.getElevationLoss_m();
+    }
+
     @VisibleForTesting
     @Override
     public void setRemoteSensorManager(BluetoothRemoteSensorManager remoteSensorManager) {

src/main/java/de/dennisguse/opentracks/services/TrackRecordingServiceInterface.java

@@ -78,6 +78,13 @@ public interface TrackRecordingServiceInterface {
      */
     Float getElevationGain_m();
 
+    /**
+     * Gets the current elevation loss.
+     *
+     * @return elevation loss in m or null.
+     */
+    Float getElevationLoss_m();
+
     @VisibleForTesting
     void setRemoteSensorManager(BluetoothRemoteSensorManager remoteSensorManager);
 

src/main/java/de/dennisguse/opentracks/services/handlers/GpsStatus.java

@@ -25,7 +25,7 @@ class GpsStatus {
 
     private GpsStatusValue gpsStatus = GpsStatusValue.GPS_NONE;
     private GpsStatusListener client;
-    private Context context;
+    private final Context context;
 
     // Last location. It can be null.
     private Location lastLocation = null;
@@ -51,7 +51,7 @@ class GpsStatus {
         }
     }
 
-    private Handler gpsStatusHandler;
+    private final Handler gpsStatusHandler;
     private GpsStatusRunner gpsStatusRunner = null;
 
     /**

src/main/java/de/dennisguse/opentracks/services/handlers/HandlerServer.java

@@ -12,7 +12,7 @@ import de.dennisguse.opentracks.content.data.TrackPoint;
 
 public class HandlerServer {
 
-    private static String TAG = HandlerServer.class.getSimpleName();
+    private static final String TAG = HandlerServer.class.getSimpleName();
 
     private final LocationHandler locationHandler;
     private final HandlerServerInterface service;

src/main/java/de/dennisguse/opentracks/services/sensors/ElevationSumManager.java

@@ -112,6 +112,6 @@ public class ElevationSumManager implements SensorEventListener {
 
         lastSeenSensorValue_hPa = value_hPa;
 
-        Log.v(TAG, "elevation gain: " + elevationGain_m);
+        Log.v(TAG, "elevation gain: " + elevationGain_m + ", elevation loss: " + elevationLoss_m);
     }
 }

src/main/java/de/dennisguse/opentracks/services/tasks/AnnouncementPeriodicTask.java

@@ -168,8 +168,7 @@ public class AnnouncementPeriodicTask implements PeriodicTask {
         String category = track != null ? track.getCategory() : "";
 
         List<TrackPoint> trackPoints = contentProviderUtils.getTrackPoints(track.getId());
-        IntervalStatistics intervalStatistics = new IntervalStatistics();
-        intervalStatistics.build(trackPoints, (float) (PreferencesUtils.isMetricUnits(context) ? 1d * UnitConversions.KM_TO_M : 1d * UnitConversions.MI_TO_M));
+        IntervalStatistics intervalStatistics = new IntervalStatistics(trackPoints, (float) (PreferencesUtils.isMetricUnits(context) ? 1d * UnitConversions.KM_TO_M : 1d * UnitConversions.MI_TO_M));
         IntervalStatistics.Interval lastInterval = intervalStatistics.getLastInterval();
 
         String announcement = AnnouncementUtils.getAnnouncement(context, trackStatistics, category, lastInterval);

src/main/java/de/dennisguse/opentracks/settings/SettingsActivity.java

@@ -4,10 +4,10 @@ import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
 import android.util.Log;
+import android.view.View;
 import android.widget.Toast;
 
 import androidx.appcompat.app.AlertDialog;
-import androidx.appcompat.app.AppCompatActivity;
 import androidx.appcompat.widget.Toolbar;
 import androidx.documentfile.provider.DocumentFile;
 import androidx.fragment.app.DialogFragment;
@@ -18,6 +18,7 @@ import androidx.preference.PreferenceFragmentCompat;
 
 import java.util.Locale;
 
+import de.dennisguse.opentracks.AbstractActivity;
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.fragments.ChooseActivityTypeDialogFragment;
 import de.dennisguse.opentracks.io.file.TrackFileFormat;
@@ -31,7 +32,7 @@ import de.dennisguse.opentracks.util.HackUtils;
 import de.dennisguse.opentracks.util.PreferencesUtils;
 import de.dennisguse.opentracks.util.StringUtils;
 
-public class SettingsActivity extends AppCompatActivity implements ChooseActivityTypeDialogFragment.ChooseActivityTypeCaller, ResetDialogPreference.ResetCallback {
+public class SettingsActivity extends AbstractActivity implements ChooseActivityTypeDialogFragment.ChooseActivityTypeCaller, ResetDialogPreference.ResetCallback {
 
     private static final String TAG = SettingsActivity.class.getSimpleName();
     public static final String EXTRAS_CHECK_EXPORT_DIRECTORY = "Check Export Directory";
@@ -43,12 +44,6 @@ public class SettingsActivity extends AppCompatActivity implements ChooseActivit
     protected void onCreate(Bundle savedInstanceState) {
         super.onCreate(savedInstanceState);
 
-        setContentView(R.layout.settings);
-
-        Toolbar toolbar = findViewById(R.id.toolbar);
-        toolbar.setTitle(R.string.menu_settings);
-        setSupportActionBar(toolbar);
-
         Intent intent = getIntent();
         if (intent != null && intent.hasExtra(EXTRAS_CHECK_EXPORT_DIRECTORY)) {
             checkExportDirectory = true;
@@ -56,6 +51,17 @@ public class SettingsActivity extends AppCompatActivity implements ChooseActivit
         onReset();
     }
 
+    @Override
+    protected View getRootView() {
+        return getLayoutInflater().inflate(R.layout.settings, null);
+    }
+
+    @Override
+    protected void setupActionBarBack(Toolbar toolbar) {
+        super.setupActionBarBack(toolbar);
+        toolbar.setTitle(R.string.menu_settings);
+    }
+
     @Override
     protected void onResume() {
         if (checkExportDirectory) {
@@ -154,7 +160,7 @@ public class SettingsActivity extends AppCompatActivity implements ChooseActivit
                 activityPreferenceDialog = ActivityTypePreference.ActivityPreferenceDialog.newInstance(preference.getKey());
                 dialogFragment = activityPreferenceDialog;
             } else if (preference instanceof BluetoothLeHeartRatePreference) {
-                dialogFragment = BluetoothLeSensorPreference.BluetoothLeSensorPreferenceDialog.newInstance(preference.getKey(), BluetoothUtils.HEART_RATE_SERVICE_UUID);
+                dialogFragment = BluetoothLeSensorPreference.BluetoothLeSensorPreferenceDialog.newInstance(preference.getKey(), BluetoothUtils.HEART_RATE_SUPPORTING_DEVICES);
             } else if (preference instanceof BluetoothLeCyclingCadenceAndSpeedPreference) {
                 dialogFragment = BluetoothLeSensorPreference.BluetoothLeSensorPreferenceDialog.newInstance(preference.getKey(), BluetoothUtils.CYCLING_SPEED_CADENCE_SERVICE_UUID);
             } else if (preference instanceof BluetoothLeCyclingPowerPreference) {

src/main/java/de/dennisguse/opentracks/settings/bluetooth/BluetoothLeSensorPreference.java

@@ -8,8 +8,6 @@ import android.bluetooth.le.ScanResult;
 import android.bluetooth.le.ScanSettings;
 import android.content.Context;
 import android.content.DialogInterface;
-import android.graphics.drawable.Animatable;
-import android.graphics.drawable.Drawable;
 import android.os.Bundle;
 import android.os.ParcelUuid;
 import android.text.TextUtils;
@@ -18,13 +16,15 @@ import android.util.Log;
 import android.widget.Toast;
 
 import androidx.appcompat.app.AlertDialog;
-import androidx.core.content.ContextCompat;
 import androidx.preference.DialogPreference;
 import androidx.preference.PreferenceDialogFragmentCompat;
+import androidx.vectordrawable.graphics.drawable.AnimatedVectorDrawableCompat;
 
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.List;
 import java.util.UUID;
+import java.util.stream.Collectors;
 
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.settings.BluetoothLeAdapter;
@@ -39,7 +39,7 @@ public abstract class BluetoothLeSensorPreference extends DialogPreference {
 
     private static final String TAG = BluetoothLeSensorPreference.class.getSimpleName();
 
-    private static final String ARG_BLUETOOTH_UUID = "bluetoothUUID";
+    private static final String ARG_BLE_SERVICE_UUIDS = "bluetoothUUID";
 
     private static final int DEVICE_NONE_RESOURCEID = R.string.value_none;
 
@@ -94,6 +94,8 @@ public abstract class BluetoothLeSensorPreference extends DialogPreference {
 
     public static class BluetoothLeSensorPreferenceDialog extends PreferenceDialogFragmentCompat {
 
+        private AnimatedVectorDrawableCompat bluetoothIcon;
+
         private int selectedEntryIndex;
         private final BluetoothLeAdapter listAdapter = new BluetoothLeAdapter();
 
@@ -109,8 +111,9 @@ public abstract class BluetoothLeSensorPreference extends DialogPreference {
 
             @Override
             public void onBatchScanResults(List<ScanResult> results) {
-                for (ScanResult scanResult : results) {
-                    listAdapter.add(scanResult.getDevice());
+                for (ScanResult result : results) {
+                    Log.d(TAG, "Found device " + result.getDevice().getName() + " " + result);
+                    listAdapter.add(result.getDevice());
                 }
             }
 
@@ -124,10 +127,14 @@ public abstract class BluetoothLeSensorPreference extends DialogPreference {
         };
 
         public static BluetoothLeSensorPreferenceDialog newInstance(String preferenceKey, UUID sensorUUID) {
+            return newInstance(preferenceKey, Collections.singletonList(sensorUUID));
+        }
+
+        public static BluetoothLeSensorPreferenceDialog newInstance(String preferenceKey, List<UUID> sensorUUIDs) {
             final BluetoothLeSensorPreferenceDialog fragment = new BluetoothLeSensorPreferenceDialog();
             final Bundle b = new Bundle(1);
             b.putString(ARG_KEY, preferenceKey);
-            b.putSerializable(ARG_BLUETOOTH_UUID, sensorUUID);
+            b.putParcelableArrayList(ARG_BLE_SERVICE_UUIDS, new ArrayList<>(sensorUUIDs.stream().map(ParcelUuid::new).collect(Collectors.toList())));
             fragment.setArguments(b);
             return fragment;
         }
@@ -136,8 +143,12 @@ public abstract class BluetoothLeSensorPreference extends DialogPreference {
         public void onCreate(Bundle savedInstanceState) {
             super.onCreate(savedInstanceState);
 
-            UUID sensorUUID = (UUID) getArguments().getSerializable(ARG_BLUETOOTH_UUID);
-            Log.i(TAG, "UUID: " + sensorUUID);
+            List<ParcelUuid> serviceUUIDs = getArguments().getParcelableArrayList(ARG_BLE_SERVICE_UUIDS);
+
+            // Don't know why: need to load the drawable _twice_, so that animation is actually started.
+            bluetoothIcon = AnimatedVectorDrawableCompat.create(getContext(), R.drawable.ic_bluetooth_searching_animated_24dp);
+            bluetoothIcon = AnimatedVectorDrawableCompat.create(getContext(), R.drawable.ic_bluetooth_searching_animated_24dp);
+            bluetoothIcon.start();
 
             BluetoothAdapter bluetoothAdapter = BluetoothUtils.getAdapter(getContext());
             if (bluetoothAdapter == null || !bluetoothAdapter.isEnabled()) {
@@ -148,7 +159,7 @@ public abstract class BluetoothLeSensorPreference extends DialogPreference {
             }
 
             if (bluetoothAdapter.isDiscovering()) {
-                Log.i(TAG, "Cancelling ongoing B<aluetooth discovery.");
+                Log.i(TAG, "Cancelling ongoing Bluetooth discovery.");
                 bluetoothAdapter.cancelDiscovery();
             }
 
@@ -170,9 +181,7 @@ public abstract class BluetoothLeSensorPreference extends DialogPreference {
                 selectedEntryIndex = 1;
             }
 
-            ScanFilter.Builder scanFilterBuilder = new ScanFilter.Builder().setServiceUuid(new ParcelUuid(sensorUUID));
-            List<ScanFilter> scanFilter = new ArrayList<>();
-            scanFilter.add(scanFilterBuilder.build());
+            List<ScanFilter> scanFilter = serviceUUIDs.stream().map(it -> new ScanFilter.Builder().setServiceUuid(it).build()).collect(Collectors.toList());
 
             ScanSettings.Builder scanSettingsBuilder = new ScanSettings.Builder();
             scanSettingsBuilder.setScanMode(ScanSettings.SCAN_MODE_LOW_LATENCY);
@@ -193,9 +202,7 @@ public abstract class BluetoothLeSensorPreference extends DialogPreference {
                         dialog.dismiss();
                     });
 
-            Drawable icon = ContextCompat.getDrawable(getContext(), R.drawable.ic_bluetooth_searching_animated_24dp);
-            ((Animatable) icon).start();
-            builder.setIcon(icon);
+            builder.setIcon(bluetoothIcon);
 
             builder.setPositiveButton(null, null);
         }
@@ -214,5 +221,12 @@ public abstract class BluetoothLeSensorPreference extends DialogPreference {
                 }
             }
         }
+
+        @Override
+        public void onDestroy() {
+            super.onDestroy();
+            bluetoothIcon = null;
+            scanner = null;
+        }
     }
 }

src/main/java/de/dennisguse/opentracks/stats/TrackStatistics.java

@@ -45,6 +45,8 @@ public class TrackStatistics {
     private double maxSpeed_mps;
     // The total elevation gained (meters).
     private Float totalElevationGain_m = null;
+    // The total elevation lost (meters).
+    private Float totalElevationLoss_m = null;
 
     public TrackStatistics() {
     }
@@ -63,6 +65,7 @@ public class TrackStatistics {
         maxSpeed_mps = other.maxSpeed_mps;
         elevationExtremities.set(other.elevationExtremities.getMin(), other.elevationExtremities.getMax());
         totalElevationGain_m = other.totalElevationGain_m;
+        totalElevationLoss_m = other.totalElevationLoss_m;
     }
 
     /**
@@ -91,6 +94,15 @@ public class TrackStatistics {
                 totalElevationGain_m += other.totalElevationGain_m;
             }
         }
+        if (totalElevationLoss_m == null) {
+            if (other.totalElevationLoss_m != null) {
+                totalElevationLoss_m = other.totalElevationLoss_m;
+            }
+        } else {
+            if (other.totalElevationLoss_m != null) {
+                totalElevationLoss_m += other.totalElevationLoss_m;
+            }
+        }
     }
 
     /**
@@ -257,6 +269,26 @@ public class TrackStatistics {
         totalElevationGain_m += gain_m;
     }
 
+    public boolean hasTotalElevationLoss() {
+        return totalElevationLoss_m != null;
+    }
+
+    public @Nullable
+    Float getTotalElevationLoss() {
+        return totalElevationLoss_m;
+    }
+
+    public void setTotalElevationLoss(float totalElevationLoss_m) {
+        this.totalElevationLoss_m = totalElevationLoss_m;
+    }
+
+    public void addTotalElevationLoss(float loss_m) {
+        if (totalElevationLoss_m == null) {
+            totalElevationLoss_m = 0f;
+        }
+        totalElevationLoss_m += loss_m;
+    }
+
     @NonNull
     @Override
     public String toString() {
@@ -264,6 +296,7 @@ public class TrackStatistics {
                 + "; Total Distance: " + getTotalDistance() + "; Total Time: " + getTotalTime()
                 + "; Moving Time: " + getMovingTime() + "; Max Speed: " + getMaxSpeed()
                 + "; Min Elevation: " + getMinElevation() + "; Max Elevation: " + getMaxElevation()
-                + "; Elevation Gain: " + getTotalElevationGain() + "}";
+                + "; Elevation Gain: " + getTotalElevationGain()
+                + "; Elevation Loss: " + getTotalElevationLoss() + "}";
     }
 }

src/main/java/de/dennisguse/opentracks/stats/TrackStatisticsUpdater.java

@@ -145,6 +145,12 @@ public class TrackStatisticsUpdater {
             Log.d(TAG, "elevation gain: " + trackPoint.getElevationGain());
         }
 
+        //Get elevation loss
+        if (trackPoint.hasElevationLoss()) {
+            currentSegment.addTotalElevationLoss(trackPoint.getElevationLoss());
+            Log.d(TAG, "elevation loss: " + trackPoint.getElevationLoss());
+        }
+
         if (lastTrackPoint == null || lastMovingTrackPoint == null) {
             lastTrackPoint = trackPoint;
             lastMovingTrackPoint = trackPoint;

src/main/java/de/dennisguse/opentracks/util/BluetoothUtils.java

@@ -23,6 +23,9 @@ import android.util.Log;
 
 import androidx.annotation.NonNull;
 
+import java.util.Arrays;
+import java.util.Collections;
+import java.util.List;
 import java.util.UUID;
 
 import de.dennisguse.opentracks.content.sensor.SensorDataCycling;
@@ -39,6 +42,12 @@ public class BluetoothUtils {
     public static final UUID HEART_RATE_SERVICE_UUID = new UUID(0x180D00001000L, 0x800000805f9b34fbL);
     public static final UUID HEART_RATE_MEASUREMENT_CHAR_UUID = new UUID(0x2A3700001000L, 0x800000805f9b34fbL);
 
+    public static final List<UUID> HEART_RATE_SUPPORTING_DEVICES = Collections.unmodifiableList(Arrays.asList(
+            BluetoothUtils.HEART_RATE_SERVICE_UUID,
+            //Devices that support HEART_RATE_SERVICE_UUID, but do not announce HEART_RATE_SERVICE_UUID in there BLE announcement messages (during device discovery).
+            UUID.fromString("0000fee0-0000-1000-8000-00805f9b34fb") //Miband3
+    ));
+
     public static final UUID CYCLING_POWER_UUID = new UUID(0x181800001000L, 0x800000805f9b34fbL);
     public static final UUID CYCLING_POWER_MEASUREMENT_CHAR_UUID = new UUID(0x2A6300001000L, 0x800000805f9b34fbL);
 

src/main/java/de/dennisguse/opentracks/util/IntentUtils.java

@@ -23,6 +23,7 @@ import android.provider.MediaStore;
 import android.util.Log;
 import android.util.Pair;
 
+import androidx.annotation.Nullable;
 import androidx.core.content.FileProvider;
 
 import java.io.File;
@@ -80,7 +81,6 @@ public class IntentUtils {
             trackDescription = track == null ? "" : new DescriptionGenerator(context).generateTrackDescription(track, false);
         }
 
-        String action = trackIds.length == 1 ? Intent.ACTION_SEND : Intent.ACTION_SEND_MULTIPLE;
         String mime = "";
 
         ArrayList<Uri> uris = new ArrayList<>();
@@ -95,9 +95,8 @@ public class IntentUtils {
             uris.add(uriAndMime.first);
             mime = uriAndMime.second;
         }
-        return new Intent(action)
+        return new Intent(Intent.ACTION_SEND_MULTIPLE)
                 .setType(mime)
-                .setAction(Intent.ACTION_SEND_MULTIPLE)
                 .putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris)
                 .addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
                 .putExtra(Intent.EXTRA_SUBJECT, context.getString(R.string.share_track_subject))
@@ -105,13 +104,41 @@ public class IntentUtils {
     }
 
     /**
-     * Creates an intent to share an image with an app.
+     * Creates an intent to share a track file with an app.
      *
-     * @param context the context.
-     * @param uri     uri with the image to share.
+     * @param context   the context
+     * @param markerIds the marker ids
+     * @return an Intent or null (if nothing can be shared).
      */
-    public static Intent newShareImageIntent(Context context, Uri uri) {
-        String mime = context.getContentResolver().getType(uri);
+    @Nullable
+    public static Intent newShareFileIntent(Context context, Marker.Id... markerIds) {
+        if (markerIds.length == 0) {
+            throw new RuntimeException("Need to share at least one marker.");
+        }
+
+        String mime = null;
+
+        ContentProviderUtils contentProviderUtils = new ContentProviderUtils(context);
+        ArrayList<Uri> uris = new ArrayList<>();
+        for (Marker.Id markerId : markerIds) {
+            Marker marker = contentProviderUtils.getMarker(markerId);
+            if (marker == null) {
+                Log.e(TAG, "MarkerId " + markerId.getId() + " could not be resolved.");
+                continue;
+            }
+            if (marker.getPhotoURI() == null) {
+                Log.e(TAG, "MarkerId " + markerId.getId() + " has no picture.");
+                continue;
+            }
+
+            mime = context.getContentResolver().getType(marker.getPhotoURI());
+
+            uris.add(marker.getPhotoURI());
+        }
+
+        if (uris.size() == 0) {
+            return null;
+        }
 
         /*
          * Because the #166 bug, when you import KMZ tracks then it creates file:/// from markers with photo.
@@ -119,11 +146,10 @@ public class IntentUtils {
          * In .setType, to avoid side effects because the #166 bug described above it checks if mime is null.
          * If it is then it hardcode "images/*".
          */
-        return new Intent(Intent.ACTION_SEND)
+        return new Intent(Intent.ACTION_SEND_MULTIPLE)
                 .setType(mime != null ? mime : "image/*")
-                .setAction(Intent.ACTION_SEND)
+                .putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris)
                 .addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION)
-                .putExtra(Intent.EXTRA_STREAM, uri)
                 .putExtra(Intent.EXTRA_SUBJECT, context.getString(R.string.share_image_subject))
                 .putExtra(Intent.EXTRA_TEXT, context.getString(R.string.share_image_body));
     }

src/main/java/de/dennisguse/opentracks/util/MarkerUtils.java

@@ -4,6 +4,7 @@ import android.content.Context;
 import android.graphics.drawable.Drawable;
 
 import androidx.annotation.NonNull;
+import androidx.core.content.ContextCompat;
 
 import de.dennisguse.opentracks.R;
 
@@ -15,6 +16,6 @@ public class MarkerUtils {
     }
 
     public static Drawable getDefaultPhoto(@NonNull Context context) {
-        return context.getResources().getDrawable(ICON_ID);
+        return ContextCompat.getDrawable(context, ICON_ID);
     }
 }

src/main/java/de/dennisguse/opentracks/util/PressureSensorUtils.java

@@ -5,18 +5,18 @@ import android.hardware.SensorManager;
 public class PressureSensorUtils {
 
     //Everything above is considered a meaningful change in elevation.
-    private static float ELEVATION_CHANGE_DIFF_M = 3.0f;
+    private static final float ELEVATION_CHANGE_DIFF_M = 3.0f;
 
-    private static float EXPONENTIAL_SMOOTHING = 0.3f;
+    private static final float EXPONENTIAL_SMOOTHING = 0.3f;
 
     private PressureSensorUtils() {
     }
 
     public static class ElevationChange {
 
-        private float currentSensorValue_hPa;
+        private final float currentSensorValue_hPa;
 
-        private float elevationChange_m;
+        private final float elevationChange_m;
 
         public ElevationChange(float currentSensorValue_hPa, float elevationChange_m) {
             this.currentSensorValue_hPa = currentSensorValue_hPa;
@@ -36,7 +36,7 @@ public class PressureSensorUtils {
         }
 
         public float getElevationLoss_m() {
-            return elevationChange_m < 0 ? elevationChange_m : 0;
+            return elevationChange_m < 0 ? -1 * elevationChange_m : 0;
         }
     }
 
@@ -65,7 +65,7 @@ public class PressureSensorUtils {
 
         // Limit elevation change by ELEVATION_CHANGE_DIFF and computes pressure value accordingly.
         ElevationChange elevationChange = new ElevationChange(currentSensorValue_hPa, elevationChange_m);
-        if (elevationChange.getElevationGain_m() > 0) {
+        if (elevationChange.getElevationChange_m() > 0) {
             return new ElevationChange(getBarometricPressure(SensorManager.PRESSURE_STANDARD_ATMOSPHERE, lastSensorValue_m + ELEVATION_CHANGE_DIFF_M), ELEVATION_CHANGE_DIFF_M);
         } else {
             return new ElevationChange(getBarometricPressure(SensorManager.PRESSURE_STANDARD_ATMOSPHERE, lastSensorValue_m - ELEVATION_CHANGE_DIFF_M), -1 * ELEVATION_CHANGE_DIFF_M);

src/main/java/de/dennisguse/opentracks/util/StringUtils.java

@@ -118,6 +118,34 @@ public class StringUtils {
         }
     }
 
+    public static String formatSpeed(Context context, double speed_mps, boolean metricUnits, boolean reportSpeed) {
+        if (Double.isNaN(speed_mps) || Double.isInfinite(speed_mps)) {
+            speed_mps = 0;
+        }
+
+        double speed = speed_mps * UnitConversions.M_TO_KM; //KM p sec
+        if (!metricUnits) {
+            speed *= UnitConversions.KM_TO_MI;
+        }
+
+        if (reportSpeed) {
+            if (metricUnits) {
+                return context.getString(R.string.value_float_kilometer_hour, speed * UnitConversions.S_TO_HR);
+            } else {
+                return context.getString(R.string.value_float_mile_hour, speed * UnitConversions.S_TO_HR);
+            }
+        } else {
+            int pace = speed == 0 ? 0 : (int) Math.round(1 / speed); //sec / [KM | MI]
+            int minutes = pace / 60;
+            int seconds = pace % 60;
+            if (metricUnits) {
+                return context.getString(R.string.value_pace_kilometer, minutes, seconds);
+            } else {
+                return context.getString(R.string.value_pace_mile, minutes, seconds);
+            }
+        }
+    }
+
     private static String formatDecimal(double value) {
         return StringUtils.formatDecimal(value, 2);
     }

src/main/java/de/dennisguse/opentracks/util/ThemeUtils.java

@@ -2,10 +2,13 @@ package de.dennisguse.opentracks.util;
 
 import android.content.Context;
 import android.content.res.Resources;
+import android.content.res.TypedArray;
 import android.util.TypedValue;
 
 import androidx.core.content.ContextCompat;
 
+import de.dennisguse.opentracks.R;
+
 public class ThemeUtils {
 
     private ThemeUtils() {
@@ -37,4 +40,18 @@ public class ThemeUtils {
 
         return ContextCompat.getColor(context, typedValue.resourceId);
     }
+
+    public static int getFontSizeSmallInPx(Context context) {
+        TypedArray typedArray = context.obtainStyledAttributes(R.style.TextSmall, new int[]{android.R.attr.textSize});
+        int fontSize = typedArray.getDimensionPixelSize(0, 12);
+        typedArray.recycle();
+        return fontSize;
+    }
+
+    public static int getFontSizeMediumInPx(Context context) {
+        TypedArray typedArray = context.obtainStyledAttributes(R.style.TextMedium, new int[]{android.R.attr.textSize});
+        int fontSize = typedArray.getDimensionPixelSize(0, 15);
+        typedArray.recycle();
+        return fontSize;
+    }
 }

src/main/java/de/dennisguse/opentracks/viewmodels/AggregatedStatistics.java

@@ -1,6 +1,10 @@
 package de.dennisguse.opentracks.viewmodels;
 
+import androidx.annotation.NonNull;
+import androidx.annotation.VisibleForTesting;
+
 import java.util.ArrayList;
+import java.util.Collections;
 import java.util.HashMap;
 import java.util.List;
 import java.util.Map;
@@ -10,50 +14,58 @@ import de.dennisguse.opentracks.stats.TrackStatistics;
 
 public class AggregatedStatistics {
 
-    private final Map<String, AggregatedStatistic> aggregatedStatistics = new HashMap<>();
+    private final Map<String, AggregatedStatistic> dataMap = new HashMap<>();
 
-    public void aggregate(List<Track> tracks) {
+    private final List<AggregatedStatistic> dataList = new ArrayList<>();
+
+    public AggregatedStatistics(@NonNull List<Track> tracks) {
         for (Track track : tracks) {
             aggregate(track);
         }
+
+        dataList.addAll(dataMap.values());
+        Collections.sort(dataList, (o1, o2) -> {
+            if (o1.getCountTracks() == o2.getCountTracks()) {
+                return o1.getCategory().compareTo(o2.getCategory());
+            }
+            return (o1.getCountTracks() < o2.getCountTracks() ? 1 : -1);
+        });
     }
 
-    public void aggregate(Track track) {
+    @VisibleForTesting
+    public void aggregate(@NonNull Track track) {
         String category = track.getCategory();
-        if (aggregatedStatistics.containsKey(category)) {
-            aggregatedStatistics.get(category).add(track.getTrackStatistics());
+        if (dataMap.containsKey(category)) {
+            dataMap.get(category).add(track.getTrackStatistics());
         } else {
-            aggregatedStatistics.put(category, new AggregatedStatistic(track.getTrackStatistics()));
+            dataMap.put(category, new AggregatedStatistic(category, track.getTrackStatistics()));
         }
     }
 
     public int getCount() {
-        return aggregatedStatistics.size();
-    }
-
-    public String getSportName(int position) {
-        return getKey(position);
+        return dataMap.size();
     }
 
     public AggregatedStatistic get(String category) {
-        return aggregatedStatistics.get(category);
-    }
-
-    private String getKey(int position) {
-        return (new ArrayList<>(aggregatedStatistics.keySet())).get(position);
+        return dataMap.get(category);
     }
 
     public AggregatedStatistic getItem(int position) {
-        return (new ArrayList<>(aggregatedStatistics.values())).get(position);
+        return dataList.get(position);
     }
 
     public static class AggregatedStatistic {
+        private final String category;
         private final TrackStatistics trackStatistics;
-        private int countTracks;
+        private int countTracks = 1;
 
-        public AggregatedStatistic(TrackStatistics trackStatistics) {
+        public AggregatedStatistic(String category, TrackStatistics trackStatistics) {
+            this.category = category;
             this.trackStatistics = trackStatistics;
-            this.countTracks = 1;
+        }
+
+        public String getCategory() {
+            return category;
         }
 
         public TrackStatistics getTrackStatistics() {

src/main/java/de/dennisguse/opentracks/viewmodels/AggregatedStatisticsModel.java

@@ -33,8 +33,7 @@ public class AggregatedStatisticsModel extends AndroidViewModel {
             ContentProviderUtils contentProviderUtils = new ContentProviderUtils(getApplication().getApplicationContext());
             List<Track> tracks = contentProviderUtils.getTracks();
 
-            AggregatedStatistics aggregatedStatistics = new AggregatedStatistics();
-            aggregatedStatistics.aggregate(tracks);
+            AggregatedStatistics aggregatedStatistics = new AggregatedStatistics(tracks);
 
             aggregatedStats.postValue(aggregatedStatistics);
         }).start();

src/main/java/de/dennisguse/opentracks/viewmodels/IntervalStatistics.java

@@ -8,31 +8,33 @@ import de.dennisguse.opentracks.util.LocationUtils;
 import de.dennisguse.opentracks.util.UnitConversions;
 
 public class IntervalStatistics {
-    private List<Interval> intervalList = new ArrayList<>();
-    private float distanceInterval_m;
+    private final List<Interval> intervalList = new ArrayList<>();
+    private final float distanceInterval_m;
 
     /**
-     * @param trackPointList     the list of TrackPoint.
+     * @param trackPoints        the list of TrackPoint.
      * @param distanceInterval_m the meters of every interval.
      */
-    public void build(List<TrackPoint> trackPointList, float distanceInterval_m) {
+    public IntervalStatistics(List<TrackPoint> trackPoints, float distanceInterval_m) {
         intervalList.clear();
         this.distanceInterval_m = distanceInterval_m;
 
-        if (trackPointList == null || trackPointList.size() == 0) {
+        if (trackPoints == null || trackPoints.size() == 0) {
             return;
         }
 
         Interval interval = new Interval();
-        interval.gain_m += trackPointList.get(0).hasElevationGain() ? trackPointList.get(0).getElevationGain() : 0;
-        for (int i = 1; i < trackPointList.size(); i++) {
-            TrackPoint prevTrackPoint = trackPointList.get(i - 1);
-            TrackPoint trackPoint = trackPointList.get(i);
+        interval.gain_m += trackPoints.get(0).hasElevationGain() ? trackPoints.get(0).getElevationGain() : 0;
+        interval.loss_m += trackPoints.get(0).hasElevationLoss() ? trackPoints.get(0).getElevationLoss() : 0;
+        for (int i = 1; i < trackPoints.size(); i++) {
+            TrackPoint prevTrackPoint = trackPoints.get(i - 1);
+            TrackPoint trackPoint = trackPoints.get(i);
 
             if (LocationUtils.isValidLocation(trackPoint.getLocation()) && LocationUtils.isValidLocation(prevTrackPoint.getLocation())) {
                 interval.distance_m += prevTrackPoint.distanceTo(trackPoint);
                 interval.time_ms += trackPoint.getTime() - prevTrackPoint.getTime();
                 interval.gain_m += trackPoint.hasElevationGain() ? trackPoint.getElevationGain() : 0;
+                interval.loss_m += trackPoint.hasElevationLoss() ? trackPoint.getElevationLoss() : 0;
 
                 if (interval.distance_m >= distanceInterval_m) {
                     float adjustFactor = distanceInterval_m / interval.distance_m;
@@ -51,6 +53,7 @@ public class IntervalStatistics {
         }
     }
 
+
     public List<Interval> getIntervalList() {
         return intervalList;
     }
@@ -62,10 +65,6 @@ public class IntervalStatistics {
      * @return the interval object or null if any interval is completed.
      */
     public Interval getLastInterval() {
-        if (intervalList == null) {
-            return null;
-        }
-
         if (intervalList.size() == 1 && intervalList.get(0).getDistance_m() < distanceInterval_m) {
             return null;
         }
@@ -83,6 +82,7 @@ public class IntervalStatistics {
         private float distance_m = 0f;
         private float time_ms = 0f;
         private float gain_m = 0f;
+        private float loss_m = 0f;
 
         public Interval() {}
 
@@ -90,12 +90,14 @@ public class IntervalStatistics {
             this.distance_m = distance_m;
             this.time_ms = time_ms;
             this.gain_m = 0f;
+            this.loss_m = 0f;
         }
 
         public Interval(Interval i) {
             distance_m = i.distance_m;
             time_ms = i.time_ms;
             gain_m = i.gain_m;
+            loss_m = i.loss_m;
         }
 
         public float getDistance_m() {
@@ -120,5 +122,9 @@ public class IntervalStatistics {
         public float getGain_m() {
             return gain_m;
         }
+
+        public float getLoss_m() {
+            return loss_m;
+        }
     }
 }

src/main/java/de/dennisguse/opentracks/viewmodels/IntervalStatisticsModel.java

@@ -14,7 +14,6 @@ import de.dennisguse.opentracks.util.UnitConversions;
  */
 public class IntervalStatisticsModel {
 
-    private IntervalStatistics intervalStats;
     private final List<TrackPoint> trackPoints = new ArrayList<>();
 
     public IntervalStatistics getIntervalStats(boolean metricUnits, @Nullable IntervalOption interval) {
@@ -23,10 +22,8 @@ public class IntervalStatisticsModel {
                 interval = IntervalOption.OPTION_1;
             }
 
-            intervalStats = new IntervalStatistics();
             float distanceInterval = metricUnits ? (float) (interval.getValue() * UnitConversions.KM_TO_M) : (float) (interval.getValue() * UnitConversions.MI_TO_M);
-            intervalStats.build(trackPoints, distanceInterval);
-            return intervalStats;
+            return new IntervalStatistics(trackPoints, distanceInterval);
         }
     }
 

src/main/java/de/dennisguse/opentracks/viewmodels/MarkerEditViewModel.java

@@ -0,0 +1,176 @@
+package de.dennisguse.opentracks.viewmodels;
+
+import android.app.Application;
+import android.net.Uri;
+import android.os.ParcelFileDescriptor;
+import android.util.Log;
+import android.widget.Toast;
+
+import androidx.annotation.NonNull;
+import androidx.annotation.Nullable;
+import androidx.lifecycle.AndroidViewModel;
+import androidx.lifecycle.LiveData;
+import androidx.lifecycle.MutableLiveData;
+
+import java.io.File;
+import java.io.FileDescriptor;
+import java.io.IOException;
+import java.util.NoSuchElementException;
+
+import de.dennisguse.opentracks.R;
+import de.dennisguse.opentracks.content.data.Marker;
+import de.dennisguse.opentracks.content.data.Track;
+import de.dennisguse.opentracks.content.provider.ContentProviderUtils;
+import de.dennisguse.opentracks.services.TrackRecordingServiceConnection;
+import de.dennisguse.opentracks.util.FileUtils;
+
+public class MarkerEditViewModel extends AndroidViewModel {
+
+    private static final String TAG = MarkerEditViewModel.class.getSimpleName();
+
+    private MutableLiveData<Marker> markerData;
+    private boolean isNewMarker;
+    private Uri photoOriginalUri;
+    private final TrackRecordingServiceConnection trackRecordingServiceConnection = new TrackRecordingServiceConnection();
+
+    public MarkerEditViewModel(@NonNull Application application) {
+        super(application);
+    }
+
+    public LiveData<Marker> getMarkerData(@NonNull Track.Id trackId, @Nullable Marker.Id markerId) {
+        if (markerData == null) {
+            markerData = new MutableLiveData<>();
+            trackRecordingServiceConnection.startConnection(getApplication());
+            loadData(trackId, markerId);
+        }
+        return markerData;
+    }
+
+    @Override
+    protected void onCleared() {
+        super.onCleared();
+        trackRecordingServiceConnection.unbind(getApplication());
+    }
+
+    private void loadData(Track.Id trackId, Marker.Id markerId) {
+        Marker marker;
+        isNewMarker = markerId == null;
+        if (isNewMarker) {
+            int nextMarkerNumber = trackId == null ? 0 : new ContentProviderUtils(getApplication()).getNextMarkerNumber(trackId);
+            marker = new Marker(trackId);
+            marker.setName(getApplication().getString(R.string.marker_name_format, nextMarkerNumber));
+        } else {
+            marker = new ContentProviderUtils(getApplication()).getMarker(markerId);
+            if (marker.hasPhoto()) {
+                photoOriginalUri = marker.getPhotoURI();
+            }
+        }
+        markerData.postValue(marker);
+    }
+
+    private @NonNull Marker getMarker() throws NoSuchElementException {
+        Marker marker = markerData != null ? markerData.getValue() : null;
+        if (marker == null) {
+            Log.d(TAG, "Marker data shouldn't be null. Call getMarkerData before.");
+            throw new NoSuchElementException("Marker data shouldn't be null. Call getMarkerData before.");
+        }
+
+        return marker;
+    }
+
+    private void deletePhoto(@Nullable Uri photoUri) {
+        if (photoUri == null) {
+            return;
+        }
+
+        File photoFile = FileUtils.getPhotoFileIfExists(getApplication(), markerData.getValue().getTrackId(), photoUri);
+        if (photoFile != null) {
+            FileUtils.deleteDirectoryRecurse(photoFile);
+        }
+    }
+
+    private void deletePhoto(Marker marker) {
+        if (marker.hasPhoto()) {
+            deletePhoto(marker.getPhotoURI());
+        }
+    }
+
+    public void onPhotoDelete(String name, String category, String description) {
+        Marker marker =  getMarker();
+        if (marker.hasPhoto()) {
+            if (!marker.getPhotoURI().equals(photoOriginalUri)) {
+                deletePhoto(marker.getPhotoURI());
+            }
+            marker.setPhotoUrl(null);
+            marker.setName(name);
+            marker.setCategory(category);
+            marker.setDescription(description);
+            markerData.postValue(marker);
+        }
+    }
+
+    public void onNewCameraPhoto(@NonNull Uri photoUri, String name, String category, String description) {
+        Marker marker =  getMarker();
+        marker.setPhotoUrl(photoUri.toString());
+        marker.setName(name);
+        marker.setCategory(category);
+        marker.setDescription(description);
+        markerData.postValue(marker);
+    }
+
+    public void onNewGalleryPhoto(@NonNull Uri srcUri, String name, String category, String description) {
+        Marker marker =  getMarker();
+
+        try (ParcelFileDescriptor parcelFd = getApplication().getContentResolver().openFileDescriptor(srcUri, "r")) {
+            FileDescriptor srcFd = parcelFd.getFileDescriptor();
+            File dstFile = new File(FileUtils.getImageUrl(getApplication(), marker.getTrackId()));
+            FileUtils.copy(srcFd, dstFile);
+
+            Uri photoUri = FileUtils.getUriForFile(getApplication(), dstFile);
+            marker.setPhotoUrl(photoUri.toString());
+            marker.setName(name);
+            marker.setCategory(category);
+            marker.setDescription(description);
+            markerData.postValue(marker);
+        } catch (IOException e) {
+            Log.e(TAG, e.getMessage());
+            Toast.makeText(getApplication(), R.string.marker_add_canceled, Toast.LENGTH_LONG).show();
+        }
+    }
+
+    private void onAddDone(@NonNull Marker marker, String name, String category, String description) {
+        trackRecordingServiceConnection.addMarker(getApplication(), name, category, description, marker.hasPhoto() ? marker.getPhotoURI().toString() : null);
+    }
+
+    private void onSaveDone(@NonNull Marker marker, String name, String category, String description) {
+        marker.setName(name);
+        marker.setCategory(category);
+        marker.setDescription(description);
+        new ContentProviderUtils(getApplication()).updateMarker(getApplication(), marker);
+
+        if (photoOriginalUri != null && (!marker.hasPhoto() || !photoOriginalUri.equals(marker.getPhotoURI()))) {
+            deletePhoto(photoOriginalUri);
+        }
+    }
+
+    public void onDone(String name, String category, String description) {
+        Marker marker = getMarker();
+        if (isNewMarker) {
+            onAddDone(marker, name, category, description);
+        } else {
+            onSaveDone(marker, name, category, description);
+        }
+    }
+
+    public void onCancel() {
+        Marker marker = getMarker();
+        if (isNewMarker) {
+            // it's new marker -> clean all photos.
+            deletePhoto(marker);
+            deletePhoto(photoOriginalUri);
+        } else if (photoOriginalUri == null || (marker.hasPhoto() && !marker.getPhotoURI().equals(photoOriginalUri))) {
+            // it's an edit marker -> delete photo if it was empty or it was changed (leaving the original in that case).
+            deletePhoto(marker);
+        }
+    }
+}

src/main/res/drawable/ic_arrow_drop_down_24.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:viewportWidth="24"
+    android:viewportHeight="24"
+    android:tint="?attr/colorControlNormal">
+  <path
+      android:fillColor="@android:color/white"
+      android:pathData="M7,10l5,5 5,-5z"/>
+</vector>

src/main/res/drawable/ic_button_stop.xml

@@ -29,5 +29,5 @@
         android:name="fade_out_circle"
         android:fillAlpha="0.0"
         android:fillColor="#a31a1f"
-        android:pathData="M62.5,62.5m-0,-62a50,50 0,1 1,-0 123a50,50 0,1 1,-0 -123"></path>
+        android:pathData="M62.5,62.5m-0,-62a50,50 0,1 1,-0 123a50,50 0,1 1,-0 -123" />
 </vector>

src/main/res/layout-land/track_controller.xml

@@ -21,8 +21,8 @@ limitations under the License.
         android:layout_height="match_parent"
         android:background="@drawable/track_controller_background"
         android:orientation="vertical"
-        android:paddingLeft="8dp"
-        android:paddingRight="8dp">
+        android:paddingStart="8dp"
+        android:paddingEnd="8dp">
 
         <ImageButton
             android:id="@+id/track_controller_record"

src/main/res/layout-land/track_list.xml

@@ -47,10 +47,10 @@ limitations under the License.
                 android:id="@+id/track_list_arrow_long"
                 android:layout_width="wrap_content"
                 android:layout_height="match_parent"
-                android:layout_alignParentLeft="true"
+                android:layout_alignParentStart="true"
                 android:orientation="vertical"
-                android:paddingLeft="12dp"
-                android:paddingRight="16dp">
+                android:paddingStart="12dp"
+                android:paddingEnd="16dp">
 
                 <View
                     android:layout_width="match_parent"
@@ -73,7 +73,7 @@ limitations under the License.
             <LinearLayout
                 android:layout_width="match_parent"
                 android:layout_height="match_parent"
-                android:layout_toRightOf="@id/track_list_arrow_long"
+                android:layout_toEndOf="@id/track_list_arrow_long"
                 android:orientation="vertical">
 
                 <View

src/main/res/layout-land/track_recording.xml

@@ -25,7 +25,7 @@
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content" />
 
-            <androidx.viewpager.widget.ViewPager
+            <androidx.viewpager2.widget.ViewPager2
                 android:id="@+id/track_detail_activity_view_pager"
                 android:layout_width="match_parent"
                 android:layout_height="0dp"

src/main/res/layout/aggregated_stats.xml

@@ -9,33 +9,14 @@
     <ListView
         android:id="@+id/aggregated_stats_list"
         android:layout_width="match_parent"
-        android:layout_height="0dp"
-        android:layout_weight="1.0" />
+        android:layout_height="match_parent" />
 
-    <RelativeLayout
+    <TextView
         android:id="@+id/aggregated_stats_empty_view"
+        style="@style/TextLarge"
         android:layout_width="match_parent"
-        android:layout_height="0dp"
-        android:layout_weight="1.0">
-
-            <View
-                android:layout_width="0dp"
-                android:layout_height="match_parent"
-                android:layout_weight="1" />
-        
-            <TextView
-                style="@style/TextLarge"
-                android:layout_width="match_parent"
-                android:layout_height="match_parent"
-                android:layout_weight="4"
-                android:gravity="center_horizontal|center_vertical"
-                android:text="@string/aggregated_stats_empty_message" />
-
-            <View
-                android:layout_width="0dp"
-                android:layout_height="match_parent"
-                android:layout_weight="1" />
-
-    </RelativeLayout>
+        android:layout_height="match_parent"
+        android:gravity="center_horizontal|center_vertical"
+        android:text="@string/aggregated_stats_empty_message" />
 
 </LinearLayout>

src/main/res/layout/aggregated_stats_list_item.xml

@@ -33,115 +33,125 @@
         android:id="@+id/aggregated_stats_sport_icon"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
-        android:layout_marginLeft="16dp"
+        android:layout_marginStart="16dp"
         android:layout_marginTop="16dp"
-        app:layout_constraintLeft_toLeftOf="@id/guideline1"
+        app:layout_constraintStart_toStartOf="@id/guideline1"
         app:layout_constraintTop_toTopOf="parent"
-        app:srcCompat="@drawable/ic_activity_bike_24dp" />
+        app:tint="?android:textColorPrimary"
+        tools:srcCompat="@drawable/ic_activity_bike_24dp" />
 
     <TextView
         android:id="@+id/aggregated_stats_type_label"
         style="@style/StatsLargeLabel"
+        android:layout_marginStart="16dp"
         android:layout_marginTop="0dp"
         android:layout_marginBottom="0dp"
         app:layout_constraintBottom_toBottomOf="@+id/aggregated_stats_sport_icon"
-        app:layout_constraintLeft_toRightOf="@+id/aggregated_stats_sport_icon"
+        app:layout_constraintStart_toEndOf="@+id/aggregated_stats_sport_icon"
         app:layout_constraintTop_toTopOf="@+id/aggregated_stats_sport_icon"
-        tools:text="@string/activity_type_cycling"
-        android:layout_marginLeft="16dp" />
+        tools:text="@string/activity_type_cycling" />
 
     <TextView
         android:id="@+id/aggregated_stats_num_tracks"
         style="@style/StatsLargeLabel"
+        android:layout_marginStart="4dp"
         android:layout_marginTop="0dp"
         android:layout_marginBottom="0dp"
         app:layout_constraintBottom_toBottomOf="@+id/aggregated_stats_type_label"
-        app:layout_constraintLeft_toRightOf="@+id/aggregated_stats_type_label"
+        app:layout_constraintStart_toEndOf="@+id/aggregated_stats_type_label"
         app:layout_constraintTop_toTopOf="@+id/aggregated_stats_type_label"
-        tools:text="(1)"
-        android:layout_marginLeft="4dp" />
+        tools:text="(1)" />
 
     <!-- Distance -->
+
+    <!-- Time -->
+
     <TextView
         android:id="@+id/aggregated_stats_distance"
         style="@style/StatsLargeValue"
-        app:layout_constraintLeft_toLeftOf="@id/guideline1"
+        android:layout_marginTop="16dp"
+        app:layout_constraintEnd_toStartOf="@id/aggregated_stats_distance_unit"
+        app:layout_constraintHorizontal_chainStyle="packed"
+        app:layout_constraintStart_toEndOf="@id/guideline1"
         app:layout_constraintTop_toBottomOf="@+id/aggregated_stats_sport_icon"
-        tools:text="100000"
-        android:layout_marginLeft="16dp"
-        android:layout_marginTop="16dp" />
+        tools:layout_editor_absoluteX="52dp"
+        tools:text="100000" />
 
     <TextView
         android:id="@+id/aggregated_stats_distance_unit"
         style="@style/StatsUnit"
+        android:singleLine="true"
         app:layout_constraintBottom_toBottomOf="@+id/aggregated_stats_distance"
-        app:layout_constraintLeft_toRightOf="@+id/aggregated_stats_distance"
+        app:layout_constraintEnd_toEndOf="@id/guideline2"
+        app:layout_constraintStart_toEndOf="@+id/aggregated_stats_distance"
         tools:text="km" />
 
-    <!-- Time -->
     <TextView
         android:id="@+id/aggregated_stats_time"
         style="@style/StatsLargeValue"
-        app:layout_constraintRight_toRightOf="@id/guideline3"
+        android:layout_marginTop="16dp"
+        android:layout_marginEnd="16dp"
+        app:layout_constraintEnd_toEndOf="@id/guideline3"
+        app:layout_constraintStart_toStartOf="@+id/guideline2"
         app:layout_constraintTop_toBottomOf="@+id/aggregated_stats_sport_icon"
-        tools:text="00:00:00"
-        android:layout_marginRight="16dp"
-        android:layout_marginTop="16dp" />
+        tools:text="00:00:00" />
 
     <!-- Avg. rate -->
     <TextView
         android:id="@+id/aggregated_stats_avg_rate"
         style="@style/StatsSmallValue"
-        app:layout_constraintHorizontal_chainStyle="packed"
-        app:layout_constraintTop_toBottomOf="@id/aggregated_stats_distance"
-        app:layout_constraintLeft_toRightOf="@id/guideline1"
-        app:layout_constraintRight_toLeftOf="@+id/aggregated_stats_avg_rate_unit"
         android:layout_marginTop="24dp"
+        app:layout_constraintEnd_toStartOf="@+id/aggregated_stats_avg_rate_unit"
+        app:layout_constraintHorizontal_chainStyle="packed"
+        app:layout_constraintStart_toEndOf="@id/guideline1"
+        app:layout_constraintTop_toBottomOf="@id/aggregated_stats_distance"
         tools:text="30" />
 
     <TextView
         android:id="@+id/aggregated_stats_avg_rate_unit"
         style="@style/StatsUnit"
         app:layout_constraintBottom_toBottomOf="@+id/aggregated_stats_avg_rate"
-        app:layout_constraintLeft_toRightOf="@+id/aggregated_stats_avg_rate"
-        app:layout_constraintRight_toRightOf="@id/guideline2"
+        app:layout_constraintEnd_toEndOf="@id/guideline2"
+        app:layout_constraintStart_toEndOf="@+id/aggregated_stats_avg_rate"
         tools:text="km/h" />
 
     <TextView
         android:id="@+id/aggregated_stats_avg_rate_label"
         style="@style/StatsTinyLabel"
+        android:singleLine="true"
         app:layout_constrainedWidth="true"
+        app:layout_constraintEnd_toEndOf="@id/guideline2"
+        app:layout_constraintStart_toEndOf="@id/guideline1"
         app:layout_constraintTop_toBottomOf="@+id/aggregated_stats_avg_rate"
-        app:layout_constraintLeft_toRightOf="@id/guideline1"
-        app:layout_constraintRight_toRightOf="@id/guideline2"
         tools:text="@string/stats_average_moving_speed" />
 
     <!-- Max. rate -->
     <TextView
         android:id="@+id/aggregated_stats_max_rate"
         style="@style/StatsSmallValue"
-        app:layout_constraintHorizontal_chainStyle="packed"
-        app:layout_constraintTop_toBottomOf="@id/aggregated_stats_time"
-        app:layout_constraintLeft_toRightOf="@id/guideline2"
-        app:layout_constraintRight_toLeftOf="@+id/aggregated_stats_max_rate_unit"
         android:layout_marginTop="24dp"
+        app:layout_constraintEnd_toStartOf="@+id/aggregated_stats_max_rate_unit"
+        app:layout_constraintHorizontal_chainStyle="packed"
+        app:layout_constraintStart_toEndOf="@id/guideline2"
+        app:layout_constraintTop_toBottomOf="@id/aggregated_stats_time"
         tools:text="70" />
 
     <TextView
         android:id="@+id/aggregated_stats_max_rate_unit"
         style="@style/StatsUnit"
         app:layout_constraintBottom_toBottomOf="@+id/aggregated_stats_max_rate"
-        app:layout_constraintLeft_toRightOf="@+id/aggregated_stats_max_rate"
-        app:layout_constraintRight_toLeftOf="@id/guideline3"
+        app:layout_constraintEnd_toStartOf="@id/guideline3"
+        app:layout_constraintStart_toEndOf="@+id/aggregated_stats_max_rate"
         tools:text="km/h" />
 
     <TextView
         android:id="@+id/aggregated_stats_max_rate_label"
         style="@style/StatsTinyLabel"
+        android:singleLine="true"
         app:layout_constrainedWidth="true"
+        app:layout_constraintEnd_toStartOf="@id/guideline3"
+        app:layout_constraintStart_toEndOf="@id/guideline2"
         app:layout_constraintTop_toBottomOf="@+id/aggregated_stats_max_rate"
-        app:layout_constraintLeft_toRightOf="@id/guideline2"
-        app:layout_constraintRight_toLeftOf="@id/guideline3"
         tools:text="@string/stats_max_speed" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>

src/main/res/layout/export_activity.xml

@@ -14,7 +14,7 @@
     <androidx.core.widget.NestedScrollView
         android:layout_weight="1"
         android:layout_width="match_parent"
-        android:layout_height="match_parent">
+        android:layout_height="0dp">
 
         <androidx.constraintlayout.widget.ConstraintLayout
             android:layout_weight="1"
@@ -62,9 +62,9 @@
                 style="@style/ProgressBar"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_marginLeft="24dp"
+                android:layout_marginStart="24dp"
                 android:layout_marginTop="8dp"
-                android:layout_marginRight="24dp"
+                android:layout_marginEnd="24dp"
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@id/export_progress_done"
@@ -113,8 +113,8 @@
                 android:id="@+id/export_progress_apply_to_all"
                 android:layout_width="wrap_content"
                 android:layout_height="wrap_content"
-                android:layout_marginLeft="24dp"
-                android:layout_marginRight="24dp"
+                android:layout_marginStart="24dp"
+                android:layout_marginEnd="24dp"
                 android:layout_marginBottom="24dp"
                 android:checked="false"
                 android:text="@string/export_all_do_it_for_all"
@@ -144,7 +144,7 @@
         <Button
             android:id="@+id/export_progress_right_button"
             style="@style/BottomButton"
-            android:layout_gravity="right"
+            android:layout_gravity="end"
             android:text="@string/generic_overwrite"
             android:visibility="gone"
             tools:visibility="visible"/>

src/main/res/layout/import_activity.xml

@@ -12,7 +12,7 @@
     <androidx.core.widget.NestedScrollView
         android:layout_weight="1"
         android:layout_width="match_parent"
-        android:layout_height="match_parent">
+        android:layout_height="0dp">
 
         <androidx.constraintlayout.widget.ConstraintLayout
             android:layout_weight="1"
@@ -60,9 +60,9 @@
                 style="@style/ProgressBar"
                 android:layout_width="match_parent"
                 android:layout_height="wrap_content"
-                android:layout_marginLeft="24dp"
+                android:layout_marginStart="24dp"
                 android:layout_marginTop="8dp"
-                android:layout_marginRight="24dp"
+                android:layout_marginEnd="24dp"
                 app:layout_constraintEnd_toEndOf="parent"
                 app:layout_constraintStart_toStartOf="parent"
                 app:layout_constraintTop_toBottomOf="@id/import_progress_done"
@@ -126,7 +126,7 @@
         <Button
             android:id="@+id/import_progress_right_button"
             style="@style/BottomButton"
-            android:layout_gravity="right"
+            android:layout_gravity="end"
             android:text="@string/generic_ok"
             android:visibility="gone"
             tools:visibility="visible"/>

src/main/res/layout/interval_list_view.xml

@@ -1,21 +1,22 @@
 <?xml version="1.0" encoding="utf-8"?>
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    xmlns:tools="http://schemas.android.com/tools"
     android:orientation="vertical">
 
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:orientation="horizontal"
-        android:layout_margin="8dp">
+        android:layout_marginStart="8dp"
+        android:layout_marginEnd="8dp"
+        android:orientation="horizontal">
 
         <TextView
+            style="@style/TextMediumPrimary"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            android:text="@string/stats_split_interval"
-            style="@style/TextMedium" />
+            android:text="@string/stats_split_interval" />
 
         <Spinner
             android:id="@+id/spinner_intervals"
@@ -28,40 +29,23 @@
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:orientation="horizontal"
-        android:layout_margin="8dp">
+        android:layout_marginStart="8dp"
+        android:layout_marginEnd="8dp"
+        android:orientation="horizontal">
 
         <TextView
             android:id="@+id/interval_distance"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            style="@style/TextMedium"
-            android:layout_margin="1dp"
-            android:textAlignment="center"
-            android:layout_gravity="center"
+            style="@style/IntervalLabel"
             android:text="@string/stats_distance" />
 
         <TextView
             android:id="@+id/interval_rate"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            style="@style/TextMedium"
-            android:layout_margin="1dp"
-            android:textAlignment="center"
-            android:layout_gravity="center"
-            tools:text="Speed"/>
+            style="@style/IntervalLabel"
+            tools:text="Speed" />
 
         <TextView
             android:id="@+id/interval_elevation"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            style="@style/TextMedium"
-            android:layout_margin="1dp"
-            android:textAlignment="center"
-            android:layout_gravity="center"
+            style="@style/IntervalLabel"
             android:text="@string/stats_elevation" />
 
     </LinearLayout>
@@ -69,21 +53,21 @@
     <View
         android:layout_width="match_parent"
         android:layout_height="1dp"
-        android:layout_marginLeft="8dp"
-        android:layout_marginRight="8dp"
-        android:background="@color/stats_separator"/>
+        android:layout_marginStart="8dp"
+        android:layout_marginEnd="8dp"
+        android:background="@color/stats_separator" />
 
     <ListView
         android:id="@+id/interval_list"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"
-        android:layout_margin="8dp"/>
+        android:layout_height="match_parent"
+        android:layout_margin="8dp" />
 
     <TextView
         android:id="@+id/interval_list_empty_view"
         style="@style/TextMedium"
         android:layout_width="match_parent"
-        android:layout_height="wrap_content"
+        android:layout_height="match_parent"
         android:gravity="center_horizontal|center_vertical"
         android:text="@string/interval_list_empty_message" />
 

src/main/res/layout/interval_stats_list_item.xml

@@ -1,47 +1,51 @@
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="wrap_content"
     android:layout_marginBottom="8dp"
+    android:paddingTop="4dp"
+    android:paddingBottom="4dp"
     android:orientation="horizontal">
 
-        <TextView
-            android:id="@+id/interval_item_distance"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
-            android:layout_weight="1"
-            android:layout_gravity="center_vertical"
-            style="@style/TextMedium"
-            tools:text="1 km" />
+    <TextView
+        android:id="@+id/interval_item_distance"
+        style="@style/TextMediumPrimary"
+        android:layout_width="0dp"
+        android:layout_weight="1"
+        android:layout_gravity="center_vertical"
+        tools:text="1 km" />
+
+    <TextView
+        android:id="@+id/interval_item_rate"
+        style="@style/TextMediumPrimary"
+        android:layout_width="0dp"
+        android:layout_weight="1"
+        android:layout_gravity="center_vertical"
+        tools:text="15 km/h" />
+
+    <LinearLayout
+        android:layout_width="0dp"
+        android:layout_height="wrap_content"
+        android:layout_weight="1"
+        android:orientation="vertical">
 
         <TextView
-            android:id="@+id/interval_item_rate"
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
+            android:id="@+id/interval_item_gain"
+            style="@style/TextSmall"
+            android:layout_width="match_parent"
             android:layout_weight="1"
-            android:layout_gravity="center_vertical"
-            style="@style/TextMedium"
-            tools:text="15 km/h" />
+            app:drawableStartCompat="@drawable/ic_arrow_drop_up_24"
+            tools:text="100 m" />
 
-        <LinearLayout
-            android:layout_width="0dp"
-            android:layout_height="wrap_content"
+        <TextView
+            android:id="@+id/interval_item_loss"
+            style="@style/TextSmall"
+            android:layout_width="match_parent"
             android:layout_weight="1"
-            android:orientation="horizontal">
+            app:drawableStartCompat="@drawable/ic_arrow_drop_down_24"
+            tools:text="100 m" />
 
-            <ImageView
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:src="@drawable/ic_arrow_drop_up_24" />
-
-            <TextView
-                android:id="@+id/interval_item_gain"
-                android:layout_width="wrap_content"
-                android:layout_height="wrap_content"
-                android:layout_weight="1"
-                style="@style/TextMedium"
-                tools:text="100 m" />
-
-        </LinearLayout>
+    </LinearLayout>
 
 </LinearLayout>

src/main/res/layout/list_item.xml

@@ -44,7 +44,8 @@ limitations under the License.
             android:layout_height="wrap_content"
             android:minHeight="?android:attr/listPreferredItemHeight"
             android:paddingTop="8dp"
-            android:paddingRight="12dp"
+            android:paddingStart="4dp"
+            android:paddingEnd="12dp"
             android:paddingBottom="12dp"
             android:shrinkColumns="1"
             android:stretchColumns="1">
@@ -56,8 +57,8 @@ limitations under the License.
                     android:layout_width="wrap_content"
                     android:layout_height="wrap_content"
                     android:layout_gravity="center_vertical"
-                    android:layout_marginLeft="8dp"
-                    android:layout_marginRight="8dp"
+                    android:layout_marginStart="4dp"
+                    android:layout_marginEnd="8dp"
                     android:contentDescription="@string/image_track"
                     app:tint="?android:textColorPrimary" />
                 <!-- Table 1: Row 1: Column 2: (Table 2) -->
@@ -105,8 +106,8 @@ limitations under the License.
                                 android:layout_width="wrap_content"
                                 android:layout_height="wrap_content"
                                 android:layout_gravity="bottom"
-                                android:layout_marginLeft="2dp"
-                                android:layout_marginRight="2dp"
+                                android:layout_marginStart="2dp"
+                                android:layout_marginEnd="2dp"
                                 android:layout_marginBottom="1dp"
                                 android:contentDescription="@string/image_marker_count"
                                 android:scaleType="centerInside"

src/main/res/layout/marker_edit.xml

@@ -116,12 +116,12 @@ limitations under the License.
         <Button
             android:id="@+id/marker_edit_cancel"
             style="@style/BottomButton"
-            android:layout_gravity="left"
+            android:layout_gravity="start"
             android:text="@string/generic_cancel" />
 
         <Button
             android:id="@+id/marker_edit_done"
             style="@style/BottomButton"
-            android:layout_gravity="right" />
+            android:layout_gravity="end" />
     </LinearLayout>
 </LinearLayout>

src/main/res/layout/preference_activity_type.xml

@@ -19,9 +19,9 @@ limitations under the License.
     <LinearLayout
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        android:paddingLeft="8dp"
+        android:paddingStart="8dp"
         android:paddingTop="16dp"
-        android:paddingRight="8dp">
+        android:paddingEnd="8dp">
 
         <AutoCompleteTextView
             android:id="@+id/activity_type_preference_text_view"

src/main/res/layout/statistics_recorded.xml

@@ -36,8 +36,8 @@
             style="@style/StatsLargeLabel"
             android:text="@string/stats_distance"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
+            app:layout_constraintStart_toEndOf="@+id/guideline"
+            app:layout_constraintEnd_toStartOf="@+id/guideline2"
             app:layout_constraintTop_toTopOf="parent" />
 
         <TextView
@@ -45,8 +45,8 @@
             style="@style/StatsLargeValue"
             android:value="@string/value_unknown"
             app:layout_constraintHorizontal_chainStyle="packed"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/stats_distance_unit"
+            app:layout_constraintStart_toEndOf="@+id/guideline"
+            app:layout_constraintEnd_toStartOf="@+id/stats_distance_unit"
             app:layout_constraintTop_toBottomOf="@+id/stats_distance_label"
             tools:text="100" />
 
@@ -54,8 +54,8 @@
             android:id="@+id/stats_distance_unit"
             style="@style/StatsUnit"
             app:layout_constraintBottom_toBottomOf="@+id/stats_distance_value"
-            app:layout_constraintLeft_toRightOf="@+id/stats_distance_value"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
+            app:layout_constraintStart_toEndOf="@+id/stats_distance_value"
+            app:layout_constraintEnd_toStartOf="@+id/guideline2"
             tools:text="km" />
 
         <!-- Activity Type -->
@@ -64,20 +64,19 @@
             style="@style/StatsLargeLabel"
             android:text="@string/track_edit_activity_type_hint"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@+id/guideline2"
+            app:layout_constraintEnd_toStartOf="@+id/guideline3"
             app:layout_constraintTop_toTopOf="parent" />
 
         <ImageView
             android:id="@+id/stats_activity_type_icon"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@+id/guideline2"
+            app:layout_constraintEnd_toStartOf="@+id/guideline3"
             app:layout_constraintBottom_toBottomOf="@+id/stats_distance_value"
             app:layout_constraintTop_toTopOf="@+id/stats_distance_value"
-            app:tint="?android:attr/textColorPrimary"
-            app:tintMode="src_atop" />
+            app:tint="?android:textColorPrimary" />
 
         <!-- Total time -->
         <TextView
@@ -85,15 +84,15 @@
             style="@style/StatsLargeLabel"
             android:text="@string/stats_total_time"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
+            app:layout_constraintStart_toEndOf="@+id/guideline"
+            app:layout_constraintEnd_toStartOf="@+id/guideline2"
             app:layout_constraintTop_toBottomOf="@+id/stats_distance_value" />
 
         <TextView
             android:id="@+id/stats_total_time_value"
             style="@style/StatsLargeValue"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
+            app:layout_constraintStart_toEndOf="@+id/guideline"
+            app:layout_constraintEnd_toStartOf="@+id/guideline2"
             app:layout_constraintTop_toBottomOf="@+id/stats_total_time_label"
             tools:text="00:00:00" />
 
@@ -103,8 +102,8 @@
             style="@style/StatsLargeLabel"
             android:text="@string/stats_moving_time"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@+id/guideline2"
+            app:layout_constraintEnd_toStartOf="@+id/guideline3"
             app:layout_constraintTop_toTopOf="@+id/stats_total_time_label"
             app:layout_constraintBottom_toBottomOf="@+id/stats_total_time_label" />
 
@@ -112,8 +111,8 @@
             android:id="@+id/stats_moving_time_value"
             style="@style/StatsLargeValue"
             android:value="@string/value_unknown"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@+id/guideline2"
+            app:layout_constraintEnd_toStartOf="@+id/guideline3"
             app:layout_constraintTop_toBottomOf="@+id/stats_moving_time_label"
             tools:text="00:00:00" />
 
@@ -130,8 +129,8 @@
             android:id="@+id/stats_speed_horizontal_line"
             style="@style/StatsHorizontalLine"
             android:layout_marginBottom="8dp"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@+id/guideline"
+            app:layout_constraintEnd_toStartOf="@+id/guideline3"
             app:layout_constraintTop_toBottomOf="@+id/stats_time_barrier" />
 
         <!-- Average speed/pace -->
@@ -139,8 +138,8 @@
             android:id="@+id/stats_average_speed_label"
             style="@style/StatsSmallLabel"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@+id/guideline2"
+            app:layout_constraintEnd_toStartOf="@+id/guideline3"
             app:layout_constraintTop_toBottomOf="@id/stats_speed_horizontal_line"
             tools:text="Avg. Speed" />
 
@@ -149,8 +148,8 @@
             style="@style/StatsSmallValue"
             android:value="@string/value_unknown"
             app:layout_constraintHorizontal_chainStyle="packed"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/stats_average_speed_unit"
+            app:layout_constraintStart_toEndOf="@+id/guideline2"
+            app:layout_constraintEnd_toStartOf="@+id/stats_average_speed_unit"
             app:layout_constraintTop_toBottomOf="@+id/stats_average_speed_label"
             tools:text="30.00" />
 
@@ -158,8 +157,8 @@
             android:id="@+id/stats_average_speed_unit"
             style="@style/StatsUnit"
             app:layout_constraintBottom_toBottomOf="@+id/stats_average_speed_value"
-            app:layout_constraintLeft_toRightOf="@+id/stats_average_speed_value"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@+id/stats_average_speed_value"
+            app:layout_constraintEnd_toStartOf="@+id/guideline3"
             tools:text="km/h" />
 
         <!-- Speed max -->
@@ -167,8 +166,8 @@
             android:id="@+id/stats_max_speed_label"
             style="@style/StatsSmallLabel"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
+            app:layout_constraintStart_toEndOf="@+id/guideline"
+            app:layout_constraintEnd_toStartOf="@+id/guideline2"
             app:layout_constraintTop_toBottomOf="@id/stats_average_speed_value"
             tools:text="Max. Speed" />
 
@@ -177,8 +176,8 @@
             style="@style/StatsSmallValue"
             android:value="@string/value_unknown"
             app:layout_constraintHorizontal_chainStyle="packed"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/stats_max_speed_unit"
+            app:layout_constraintStart_toEndOf="@+id/guideline"
+            app:layout_constraintEnd_toStartOf="@+id/stats_max_speed_unit"
             app:layout_constraintTop_toBottomOf="@+id/stats_max_speed_label"
             tools:text="30.00" />
 
@@ -186,8 +185,8 @@
             android:id="@+id/stats_max_speed_unit"
             style="@style/StatsUnit"
             app:layout_constraintBottom_toBottomOf="@+id/stats_max_speed_value"
-            app:layout_constraintLeft_toRightOf="@+id/stats_max_speed_value"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
+            app:layout_constraintStart_toEndOf="@+id/stats_max_speed_value"
+            app:layout_constraintEnd_toStartOf="@+id/guideline2"
             tools:text="km/h" />
 
         <!-- Moving speed max -->
@@ -195,8 +194,8 @@
             android:id="@+id/stats_moving_speed_label"
             style="@style/StatsSmallLabel"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@+id/guideline2"
+            app:layout_constraintEnd_toStartOf="@+id/guideline3"
             app:layout_constraintTop_toBottomOf="@id/stats_average_speed_value"
             tools:text="Max. Moving Speed" />
 
@@ -205,8 +204,8 @@
             style="@style/StatsSmallValue"
             android:value="@string/value_unknown"
             app:layout_constraintHorizontal_chainStyle="packed"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/stats_moving_speed_unit"
+            app:layout_constraintStart_toEndOf="@+id/guideline2"
+            app:layout_constraintEnd_toStartOf="@+id/stats_moving_speed_unit"
             app:layout_constraintTop_toBottomOf="@+id/stats_moving_speed_label"
             tools:text="30.00" />
 
@@ -214,8 +213,8 @@
             android:id="@+id/stats_moving_speed_unit"
             style="@style/StatsUnit"
             app:layout_constraintBottom_toBottomOf="@+id/stats_moving_speed_value"
-            app:layout_constraintLeft_toRightOf="@+id/stats_moving_speed_value"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@+id/stats_moving_speed_value"
+            app:layout_constraintEnd_toStartOf="@+id/guideline3"
             tools:text="km/h" />
 
         <!-- Barrier -->
@@ -231,24 +230,24 @@
             android:id="@+id/stats_elevation_horizontal_line"
             style="@style/StatsHorizontalLine"
             android:layout_marginBottom="8dp"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@+id/guideline"
+            app:layout_constraintEnd_toStartOf="@+id/guideline3"
             app:layout_constraintTop_toBottomOf="@+id/stats_speed_barrier" />
 
-        <!-- Elevation gain -->
+        <!-- Elevation gain and loss -->
         <androidx.constraintlayout.widget.Group
             android:id="@+id/stats_elevation_group"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:constraint_referenced_ids="stats_elevation_horizontal_line,stats_elevation_gain_label,stats_elevation_gain_value,stats_elevation_gain_unit" />
+            app:constraint_referenced_ids="stats_elevation_horizontal_line,stats_elevation_gain_label,stats_elevation_gain_value,stats_elevation_gain_unit,stats_elevation_loss_label,stats_elevation_loss_value,stats_elevation_loss_unit" />
 
         <TextView
             android:id="@+id/stats_elevation_gain_label"
             style="@style/StatsSmallLabel"
             android:text="@string/stats_gain"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@+id/guideline"
+            app:layout_constraintEnd_toStartOf="@+id/guideline2"
             app:layout_constraintTop_toBottomOf="@id/stats_elevation_horizontal_line" />
 
         <TextView
@@ -256,8 +255,8 @@
             style="@style/StatsSmallValue"
             android:value="@string/value_unknown"
             app:layout_constraintHorizontal_chainStyle="packed"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/stats_elevation_gain_unit"
+            app:layout_constraintStart_toEndOf="@+id/guideline"
+            app:layout_constraintEnd_toStartOf="@+id/stats_elevation_gain_unit"
             app:layout_constraintTop_toBottomOf="@+id/stats_elevation_gain_label"
             tools:text="100" />
 
@@ -265,8 +264,35 @@
             android:id="@+id/stats_elevation_gain_unit"
             style="@style/StatsUnit"
             app:layout_constraintBottom_toBottomOf="@+id/stats_elevation_gain_value"
-            app:layout_constraintLeft_toRightOf="@+id/stats_elevation_gain_value"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@+id/stats_elevation_gain_value"
+            app:layout_constraintEnd_toStartOf="@+id/guideline2"
+            tools:text="m" />
+
+        <TextView
+            android:id="@+id/stats_elevation_loss_label"
+            style="@style/StatsSmallLabel"
+            android:text="@string/stats_loss"
+            app:layout_constrainedWidth="true"
+            app:layout_constraintStart_toEndOf="@+id/guideline2"
+            app:layout_constraintEnd_toStartOf="@+id/guideline3"
+            app:layout_constraintTop_toBottomOf="@id/stats_elevation_horizontal_line" />
+
+        <TextView
+            android:id="@+id/stats_elevation_loss_value"
+            style="@style/StatsSmallValue"
+            android:value="@string/value_unknown"
+            app:layout_constraintHorizontal_chainStyle="packed"
+            app:layout_constraintStart_toEndOf="@+id/guideline2"
+            app:layout_constraintEnd_toStartOf="@+id/stats_elevation_loss_unit"
+            app:layout_constraintTop_toBottomOf="@+id/stats_elevation_loss_label"
+            tools:text="100" />
+
+        <TextView
+            android:id="@+id/stats_elevation_loss_unit"
+            style="@style/StatsUnit"
+            app:layout_constraintBottom_toBottomOf="@+id/stats_elevation_loss_value"
+            app:layout_constraintStart_toEndOf="@+id/stats_elevation_loss_value"
+            app:layout_constraintEnd_toStartOf="@+id/guideline3"
             tools:text="m" />
 
         <!-- Barrier -->
@@ -275,15 +301,15 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             app:barrierDirection="bottom"
-            app:constraint_referenced_ids="stats_elevation_gain_value" />
+            app:constraint_referenced_ids="stats_elevation_gain_value,stats_elevation_loss_value" />
 
         <!-- Horizontal line -->
         <View
             android:id="@+id/stats_end_horizontal_line"
             style="@style/StatsHorizontalLine"
             android:layout_marginBottom="8dp"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@+id/guideline"
+            app:layout_constraintEnd_toStartOf="@+id/guideline3"
             app:layout_constraintTop_toBottomOf="@+id/stats_elevation_barrier" />
 
     </androidx.constraintlayout.widget.ConstraintLayout>

src/main/res/layout/statistics_recording.xml

@@ -36,8 +36,8 @@
             style="@style/StatsLargeLabel"
             android:text="@string/stats_distance"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/guideline2"
             app:layout_constraintTop_toTopOf="parent" />
 
         <TextView
@@ -45,17 +45,17 @@
             style="@style/StatsLargeValue"
             android:value="@string/value_unknown"
             app:layout_constraintHorizontal_chainStyle="packed"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/stats_distance_unit"
-            app:layout_constraintTop_toBottomOf="@+id/stats_distance_label"
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/stats_distance_unit"
+            app:layout_constraintTop_toBottomOf="@id/stats_distance_label"
             tools:text="100" />
 
         <TextView
             android:id="@+id/stats_distance_unit"
             style="@style/StatsUnit"
-            app:layout_constraintBottom_toBottomOf="@+id/stats_distance_value"
-            app:layout_constraintLeft_toRightOf="@+id/stats_distance_value"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
+            app:layout_constraintBottom_toBottomOf="@id/stats_distance_value"
+            app:layout_constraintStart_toEndOf="@id/stats_distance_value"
+            app:layout_constraintEnd_toStartOf="@id/guideline2"
             tools:text="km" />
 
         <!-- Activity Type -->
@@ -64,8 +64,8 @@
             style="@style/StatsLargeLabel"
             android:text="@string/track_edit_activity_type_hint"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@id/guideline2"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
             app:layout_constraintTop_toTopOf="parent" />
 
         <ImageView
@@ -73,10 +73,11 @@
             style="@style/StatsLargeValue"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
-            app:layout_constraintBottom_toBottomOf="@+id/stats_distance_value"
-            app:layout_constraintTop_toTopOf="@+id/stats_distance_value" />
+            app:layout_constraintStart_toEndOf="@id/guideline2"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
+            app:layout_constraintBottom_toBottomOf="@id/stats_distance_value"
+            app:layout_constraintTop_toTopOf="@id/stats_distance_value"
+            app:tint="?android:textColorPrimary" />
 
         <!-- Total time -->
         <TextView
@@ -84,16 +85,16 @@
             style="@style/StatsLargeLabel"
             android:text="@string/stats_total_time"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
-            app:layout_constraintTop_toBottomOf="@+id/stats_distance_value" />
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/guideline2"
+            app:layout_constraintTop_toBottomOf="@id/stats_distance_value" />
 
         <TextView
             android:id="@+id/stats_total_time_value"
             style="@style/StatsLargeValue"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
-            app:layout_constraintTop_toBottomOf="@+id/stats_total_time_label"
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/guideline2"
+            app:layout_constraintTop_toBottomOf="@id/stats_total_time_label"
             tools:text="00:00:00" />
 
         <!-- Moving time -->
@@ -102,18 +103,18 @@
             style="@style/StatsLargeLabel"
             android:text="@string/stats_moving_time"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
-            app:layout_constraintTop_toTopOf="@+id/stats_total_time_label"
-            app:layout_constraintBottom_toBottomOf="@+id/stats_total_time_label" />
+            app:layout_constraintStart_toEndOf="@id/guideline2"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
+            app:layout_constraintTop_toTopOf="@id/stats_total_time_label"
+            app:layout_constraintBottom_toBottomOf="@id/stats_total_time_label" />
 
         <TextView
             android:id="@+id/stats_moving_time_value"
             style="@style/StatsLargeValue"
             android:value="@string/value_unknown"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
-            app:layout_constraintTop_toBottomOf="@+id/stats_moving_time_label"
+            app:layout_constraintStart_toEndOf="@id/guideline2"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
+            app:layout_constraintTop_toBottomOf="@id/stats_moving_time_label"
             tools:text="00:00:00" />
 
         <!-- Barrier -->
@@ -129,17 +130,17 @@
             android:id="@+id/stats_speed_horizontal_line"
             style="@style/StatsHorizontalLine"
             android:layout_marginBottom="8dp"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
-            app:layout_constraintTop_toBottomOf="@+id/stats_time_barrier" />
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
+            app:layout_constraintTop_toBottomOf="@id/stats_time_barrier" />
 
         <!-- Speed/pace -->
         <TextView
             android:id="@+id/stats_speed_label"
             style="@style/StatsSmallLabel"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/guideline2"
             app:layout_constraintTop_toBottomOf="@id/stats_speed_horizontal_line"
             tools:text="Speed" />
 
@@ -148,17 +149,17 @@
             style="@style/StatsSmallValue"
             android:value="@string/value_unknown"
             app:layout_constraintHorizontal_chainStyle="packed"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/stats_speed_unit"
-            app:layout_constraintTop_toBottomOf="@+id/stats_speed_label"
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/stats_speed_unit"
+            app:layout_constraintTop_toBottomOf="@id/stats_speed_label"
             tools:text="30.00" />
 
         <TextView
             android:id="@+id/stats_speed_unit"
             style="@style/StatsUnit"
-            app:layout_constraintBottom_toBottomOf="@+id/stats_speed_value"
-            app:layout_constraintLeft_toRightOf="@+id/stats_speed_value"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
+            app:layout_constraintBottom_toBottomOf="@id/stats_speed_value"
+            app:layout_constraintStart_toEndOf="@id/stats_speed_value"
+            app:layout_constraintEnd_toStartOf="@id/guideline2"
             tools:text="km/h" />
 
         <!-- Average speed/pace -->
@@ -166,8 +167,8 @@
             android:id="@+id/stats_average_speed_label"
             style="@style/StatsSmallLabel"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@id/guideline2"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
             app:layout_constraintTop_toBottomOf="@id/stats_speed_horizontal_line"
             tools:text="Avg. Speed" />
 
@@ -176,17 +177,17 @@
             style="@style/StatsSmallValue"
             android:value="@string/value_unknown"
             app:layout_constraintHorizontal_chainStyle="packed"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/stats_average_speed_unit"
-            app:layout_constraintTop_toBottomOf="@+id/stats_average_speed_label"
+            app:layout_constraintStart_toEndOf="@id/guideline2"
+            app:layout_constraintEnd_toStartOf="@id/stats_average_speed_unit"
+            app:layout_constraintTop_toBottomOf="@id/stats_average_speed_label"
             tools:text="30.00" />
 
         <TextView
             android:id="@+id/stats_average_speed_unit"
             style="@style/StatsUnit"
-            app:layout_constraintBottom_toBottomOf="@+id/stats_average_speed_value"
-            app:layout_constraintLeft_toRightOf="@+id/stats_average_speed_value"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintBottom_toBottomOf="@id/stats_average_speed_value"
+            app:layout_constraintStart_toEndOf="@id/stats_average_speed_value"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
             tools:text="km/h" />
 
         <!-- Speed max -->
@@ -194,8 +195,8 @@
             android:id="@+id/stats_max_speed_label"
             style="@style/StatsSmallLabel"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/guideline2"
             app:layout_constraintTop_toBottomOf="@id/stats_average_speed_value"
             tools:text="Max. Speed" />
 
@@ -204,17 +205,17 @@
             style="@style/StatsSmallValue"
             android:value="@string/value_unknown"
             app:layout_constraintHorizontal_chainStyle="packed"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/stats_max_speed_unit"
-            app:layout_constraintTop_toBottomOf="@+id/stats_max_speed_label"
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/stats_max_speed_unit"
+            app:layout_constraintTop_toBottomOf="@id/stats_max_speed_label"
             tools:text="30.00" />
 
         <TextView
             android:id="@+id/stats_max_speed_unit"
             style="@style/StatsUnit"
-            app:layout_constraintBottom_toBottomOf="@+id/stats_max_speed_value"
-            app:layout_constraintLeft_toRightOf="@+id/stats_max_speed_value"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
+            app:layout_constraintBottom_toBottomOf="@id/stats_max_speed_value"
+            app:layout_constraintStart_toEndOf="@id/stats_max_speed_value"
+            app:layout_constraintEnd_toStartOf="@id/guideline2"
             tools:text="km/h" />
 
         <!-- Moving speed max -->
@@ -222,8 +223,8 @@
             android:id="@+id/stats_moving_speed_label"
             style="@style/StatsSmallLabel"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@id/guideline2"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
             app:layout_constraintTop_toBottomOf="@id/stats_average_speed_value"
             tools:text="Max. Moving Speed" />
 
@@ -232,17 +233,17 @@
             style="@style/StatsSmallValue"
             android:value="@string/value_unknown"
             app:layout_constraintHorizontal_chainStyle="packed"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/stats_moving_speed_unit"
-            app:layout_constraintTop_toBottomOf="@+id/stats_moving_speed_label"
+            app:layout_constraintStart_toEndOf="@id/guideline2"
+            app:layout_constraintEnd_toStartOf="@id/stats_moving_speed_unit"
+            app:layout_constraintTop_toBottomOf="@id/stats_moving_speed_label"
             tools:text="30.00" />
 
         <TextView
             android:id="@+id/stats_moving_speed_unit"
             style="@style/StatsUnit"
-            app:layout_constraintBottom_toBottomOf="@+id/stats_moving_speed_value"
-            app:layout_constraintLeft_toRightOf="@+id/stats_moving_speed_value"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintBottom_toBottomOf="@id/stats_moving_speed_value"
+            app:layout_constraintStart_toEndOf="@id/stats_moving_speed_value"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
             tools:text="km/h" />
 
         <!-- Barrier -->
@@ -258,16 +259,16 @@
             android:id="@+id/stats_elevation_horizontal_line"
             style="@style/StatsHorizontalLine"
             android:layout_marginBottom="8dp"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
-            app:layout_constraintTop_toBottomOf="@+id/stats_speed_barrier" />
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
+            app:layout_constraintTop_toBottomOf="@id/stats_speed_barrier" />
 
         <!-- Elevation -->
         <androidx.constraintlayout.widget.Group
             android:id="@+id/stats_elevation_group"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
-            app:constraint_referenced_ids="stats_elevation_horizontal_line,stats_elevation_current_label,stats_elevation_current_value,stats_elevation_current_unit,stats_elevation_gain_label,stats_elevation_gain_value,stats_elevation_gain_unit" />
+            app:constraint_referenced_ids="stats_elevation_horizontal_line,stats_elevation_current_label,stats_elevation_current_value,stats_elevation_current_unit,stats_elevation_gain_label,stats_elevation_gain_value,stats_elevation_gain_unit,stats_elevation_loss_label,stats_elevation_loss_value,stats_elevation_loss_unit" />
 
         <!-- Elevation -->
         <TextView
@@ -275,8 +276,8 @@
             style="@style/StatsSmallLabel"
             android:text="@string/stats_elevation"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/guideline2"
             app:layout_constraintTop_toBottomOf="@id/stats_elevation_horizontal_line" />
 
         <TextView
@@ -284,27 +285,27 @@
             style="@style/StatsSmallValue"
             android:value="@string/value_unknown"
             app:layout_constraintHorizontal_chainStyle="packed"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/stats_elevation_current_unit"
-            app:layout_constraintTop_toBottomOf="@+id/stats_elevation_current_label"
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/stats_elevation_current_unit"
+            app:layout_constraintTop_toBottomOf="@id/stats_elevation_current_label"
             tools:text="100" />
 
         <TextView
             android:id="@+id/stats_elevation_current_unit"
             style="@style/StatsUnit"
-            app:layout_constraintBottom_toBottomOf="@+id/stats_elevation_current_value"
-            app:layout_constraintLeft_toRightOf="@+id/stats_elevation_current_value"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
+            app:layout_constraintBottom_toBottomOf="@id/stats_elevation_current_value"
+            app:layout_constraintStart_toEndOf="@id/stats_elevation_current_value"
+            app:layout_constraintEnd_toStartOf="@id/guideline2"
             tools:text="m" />
 
-        <!-- Current elevation -->
+        <!-- Elevation gain -->
         <TextView
             android:id="@+id/stats_elevation_gain_label"
             style="@style/StatsSmallLabel"
             android:text="@string/stats_gain"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@id/guideline2"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
             app:layout_constraintTop_toBottomOf="@id/stats_elevation_horizontal_line" />
 
         <TextView
@@ -312,17 +313,45 @@
             style="@style/StatsSmallValue"
             android:value="@string/value_unknown"
             app:layout_constraintHorizontal_chainStyle="packed"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/stats_elevation_gain_unit"
-            app:layout_constraintTop_toBottomOf="@+id/stats_elevation_gain_label"
+            app:layout_constraintStart_toEndOf="@id/guideline2"
+            app:layout_constraintEnd_toStartOf="@id/stats_elevation_gain_unit"
+            app:layout_constraintTop_toBottomOf="@id/stats_elevation_gain_label"
             tools:text="100" />
 
         <TextView
             android:id="@+id/stats_elevation_gain_unit"
             style="@style/StatsUnit"
-            app:layout_constraintBottom_toBottomOf="@+id/stats_elevation_gain_value"
-            app:layout_constraintLeft_toRightOf="@+id/stats_elevation_gain_value"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintBottom_toBottomOf="@id/stats_elevation_gain_value"
+            app:layout_constraintStart_toEndOf="@id/stats_elevation_gain_value"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
+            tools:text="m" />
+
+        <!-- Elevation loss -->
+        <TextView
+            android:id="@+id/stats_elevation_loss_label"
+            style="@style/StatsSmallLabel"
+            android:text="@string/stats_loss"
+            app:layout_constrainedWidth="true"
+            app:layout_constraintStart_toEndOf="@id/guideline2"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
+            app:layout_constraintTop_toBottomOf="@id/stats_elevation_gain_value" />
+
+        <TextView
+            android:id="@+id/stats_elevation_loss_value"
+            style="@style/StatsSmallValue"
+            android:value="@string/value_unknown"
+            app:layout_constraintHorizontal_chainStyle="packed"
+            app:layout_constraintStart_toEndOf="@id/guideline2"
+            app:layout_constraintEnd_toStartOf="@id/stats_elevation_loss_unit"
+            app:layout_constraintTop_toBottomOf="@id/stats_elevation_loss_label"
+            tools:text="100" />
+
+        <TextView
+            android:id="@+id/stats_elevation_loss_unit"
+            style="@style/StatsUnit"
+            app:layout_constraintBottom_toBottomOf="@id/stats_elevation_loss_value"
+            app:layout_constraintStart_toEndOf="@id/stats_elevation_loss_value"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
             tools:text="m" />
 
         <!-- Coordinate group -->
@@ -338,16 +367,16 @@
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
             app:barrierDirection="bottom"
-            app:constraint_referenced_ids="stats_elevation_current_value,stats_elevation_gain_value" />
+            app:constraint_referenced_ids="stats_elevation_current_value,stats_elevation_gain_value,stats_elevation_loss_value" />
 
         <!-- Horizontal line -->
         <View
             android:id="@+id/stats_coordinate_horizontal_line"
             style="@style/StatsHorizontalLine"
             android:layout_marginBottom="8dp"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
-            app:layout_constraintTop_toBottomOf="@+id/stats_elevation_barrier" />
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
+            app:layout_constraintTop_toBottomOf="@id/stats_elevation_barrier" />
 
         <!-- Latitude -->
         <TextView
@@ -355,16 +384,16 @@
             style="@style/StatsSmallLabel"
             android:text="@string/stats_latitude"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/guideline2"
             app:layout_constraintTop_toBottomOf="@id/stats_coordinate_horizontal_line" />
 
         <TextView
             android:id="@+id/stats_latitude_value"
             style="@style/StatsSmallValue"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline2"
-            app:layout_constraintTop_toBottomOf="@+id/stats_latitude_label"
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/guideline2"
+            app:layout_constraintTop_toBottomOf="@id/stats_latitude_label"
             tools:text="0.834937848" />
 
         <!-- Longitude -->
@@ -373,17 +402,17 @@
             style="@style/StatsSmallLabel"
             android:text="@string/stats_longitude"
             app:layout_constrainedWidth="true"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@id/guideline2"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
             app:layout_constraintTop_toBottomOf="@id/stats_coordinate_horizontal_line" />
 
         <TextView
             android:id="@+id/stats_longitude_value"
             style="@style/StatsSmallValue"
             android:value="@string/value_unknown"
-            app:layout_constraintLeft_toRightOf="@+id/guideline2"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
-            app:layout_constraintTop_toBottomOf="@+id/stats_longitude_label"
+            app:layout_constraintStart_toEndOf="@id/guideline2"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
+            app:layout_constraintTop_toBottomOf="@id/stats_longitude_label"
             tools:text="0.834937848" />
 
         <!-- Barrier -->
@@ -399,17 +428,17 @@
             android:id="@+id/stats_sensor_horizontal_line"
             style="@style/StatsHorizontalLine"
             android:layout_marginBottom="8dp"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
-            app:layout_constraintTop_toBottomOf="@+id/stats_location_barrier" />
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
+            app:layout_constraintTop_toBottomOf="@id/stats_location_barrier" />
 
         <!-- Sensors data -->
         <androidx.recyclerview.widget.RecyclerView
             android:id="@+id/stats_sensors_recycler_view"
             android:layout_width="0dp"
             android:layout_height="wrap_content"
-            app:layout_constraintLeft_toRightOf="@+id/guideline"
-            app:layout_constraintRight_toLeftOf="@+id/guideline3"
+            app:layout_constraintStart_toEndOf="@id/guideline"
+            app:layout_constraintEnd_toStartOf="@id/guideline3"
             app:layout_constraintTop_toBottomOf="@id/stats_sensor_horizontal_line" />
 
     </androidx.constraintlayout.widget.ConstraintLayout>

src/main/res/layout/toolbar.xml

@@ -1,12 +1,10 @@
 <?xml version="1.0" encoding="utf-8"?>
-<merge xmlns:android="http://schemas.android.com/apk/res/android"
-    xmlns:app="http://schemas.android.com/apk/res-auto">
+<merge xmlns:android="http://schemas.android.com/apk/res/android">
 
     <androidx.appcompat.widget.Toolbar
         android:id="@+id/toolbar"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
         android:background="?attr/colorPrimary"
-        android:minHeight="?attr/actionBarSize"
-        app:navigationIcon="@drawable/ic_logo_color_24dp" />
+        android:minHeight="?attr/actionBarSize" />
 </merge>