Release v3.2.3

Fixed #50.

.travis.yml

@@ -1,12 +1,45 @@
+#See https://docs.travis-ci.com/user/languages/android/
+#See https://github.com/ankidroid/Anki-Android/blob/master/.travis.yml
 language: android
-dist: trusty
+
+env:
+  global:
+    - ADB_INSTALL_TIMEOUT=8
+    - ABI=armeabi-v7a
+    - EMU_FLAVOR=default
+    # PATH order is incredibly important. e.g. the 'emulator' script exists in more than one place!
+    - ANDROID_HOME=/usr/local/android-sdk
+    - TOOLS=${ANDROID_HOME}/tools
+    - PATH=${ANDROID_HOME}:${ANDROID_HOME}/emulator:${TOOLS}:${TOOLS}/bin:${ANDROID_HOME}/platform-tools:${PATH}
+  matrix:
+    - API=27 ABI=x86_64
 
 android:
   components:
+    # installing tools to start, then use `sdkmanager` below to get the rest
+    - tools
     - build-tools-28.0.3
-    - android-29
+    - android-28
+
+# Emulator Management: Create, Start and Wait
+install:
+  - echo y | sdkmanager "platform-tools"
+  - echo y | sdkmanager --channel=4 "emulator"
+  - echo y | sdkmanager "system-images;android-$API;$EMU_FLAVOR;$ABI"
+  - echo no | avdmanager create avd --force -n test -k "system-images;android-$API;$EMU_FLAVOR;$ABI" -c 10M
+  - emulator -verbose -avd test -no-accel -no-snapshot -no-window -camera-back none -camera-front none -selinux permissive -qemu -m 2048 &
+  - android-wait-for-emulator
+  - adb shell input keyevent 82 &
 
 script:
-  - ./gradlew build
+  - ./gradlew clean build
-  #TODO: When all tests are passing, CI should also execute them.
+  - ./gradlew connectedCheck
-  #- ./gradlew connectedCheck
+
+sbefore_cache:
+  - rm -f  $HOME/.gradle/caches/modules-2/modules-2.lock
+  - rm -fr $HOME/.gradle/caches/*/plugin-resolution/
+cache:
+  directories:
+    - $HOME/.gradle/caches/
+    - $HOME/.gradle/wrapper/
+    - $HOME/.android/build-cache

DEVELOPER.md

@@ -8,5 +8,5 @@
 4. Create changelog (`_version code_.txt`)
 5. Create commit with all changes
 6. Push commits
-7. Tag newly create commit with _version name_
+7. Tag newly create commit with _version name_ (e.g., v3.2.1)
-8. Push the tagged to public repository  
+8. Push the tagged commit to public repository  

build.gradle

@@ -83,6 +83,7 @@ android {
 
 dependencies {
     implementation 'androidx.appcompat:appcompat:1.1.0'
+    implementation 'androidx.preference:preference:1.1.0'
 
     androidTestImplementation 'androidx.test:core:1.2.0'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.2.0'

fastlane/metadata/android/de-DE/full_description.txt

@@ -0,0 +1,9 @@
+Open Tracks – ein GPS-Tracker, der deine Daten für sich behält.
+Erfasst deine Kilometer, ohne dass es jemand anderes tut.
+
+Funktionen & Features:
+* zeichnet Sport und andere Outdooraktivitäten auf
+* unterstützt das Markieren interessanter Orte, inkl. Foto-Funktion
+* zeichnet deine Herzfrequenz auf (unterstützt Bluetooth-LE-Sensoren)
+* exportiert deine Daten als KML oder GPX
+* funktioniert ganz ohne Internet

fastlane/metadata/android/de-DE/short_description.txt

@@ -0,0 +1 @@
+Open Tracks – ein GPS-Tracker, der deine Daten für sich behält.

fastlane/metadata/android/en-US/changelogs/3054.txt

@@ -1,4 +1,4 @@
-v3.2: OpenTracks
+v3.2.0: OpenTracks
 
 Changes:
 - Removed Widget

fastlane/metadata/android/en-US/changelogs/3063.txt

@@ -0,0 +1,7 @@
+v3.2.1: OpenTracks
+
+Changes:
+- Settings are now on a single page
+
+Developer:
+- Settings moved to Androidx compat (uses fragments)

fastlane/metadata/android/en-US/changelogs/3079.txt

@@ -0,0 +1,13 @@
+v3.2.2: OpenTracks
+
+Changes:
+- Removed aggregated stats
+- Migrated to Material Design
+
+Bugfix:
+- Fixed export of sensor data
+- Fixed import of incomplete sensor data
+
+Developer:
+- Replaced actionbar with toolbar
+- Migrated to androidx appcompat (incl. Material Design)

fastlane/metadata/android/en-US/changelogs/3101.txt

@@ -0,0 +1,14 @@
+v3.2.3: OpenTracks
+
+Changes:
+- Sharing: use Android Sharesheet
+- Sharing: share multiple tracks as individual files
+- Use Android ShareSheet
+- Heart rate sensor (Bluetooth LE): automatic reconnect
+
+Bugfix:
+- Heart rate sensor (Bluetooth LE): disconnect properly
+- Heart rate wasn't always shown while recording
+
+Developer:
+- Enabled TravisCI instrumentation tests

fastlane/metadata/android/en-US/full_description.txt

@@ -3,6 +3,6 @@ OpenTracks is a sport tracking application that completely respects your privacy
 Features:
 * Sport tracking: track your sport and outdoor activities
 * Photos and markers: mark interesting locations while tracking
-* Heart rate: supports bluetooth LE sensors
+* Heart rate: supports Bluetooth LE sensors
-* Export data: Export tracks either as KML or GPX
+* Export data: export tracks either as KML or GPX
 * No Internet access: Internet is not used

fastlane/metadata/android/en-US/title.txt

@@ -0,0 +1 @@
+OpenTracks

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

@@ -40,7 +40,6 @@ import de.dennisguse.opentracks.content.ContentProviderUtils.LocationIterator;
 import de.dennisguse.opentracks.content.Waypoint.WaypointType;
 import de.dennisguse.opentracks.stats.TripStatistics;
 
-import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
 
 /**
@@ -214,7 +213,6 @@ public class CustomContentProviderUtilsImplTest {
         Track track = providerUtils.createTrack(cursorMock);
         Assert.assertEquals(trackId, track.getId());
         Assert.assertEquals(name, track.getName());
-        verify(cursorMock);
     }
 
     /**
@@ -414,7 +412,6 @@ public class CustomContentProviderUtilsImplTest {
         Assert.assertEquals(id, waypoint.getId());
         Assert.assertEquals(name, waypoint.getName());
         Assert.assertEquals(trackId, waypoint.getTrackId());
-        verify(cursorMock);
     }
 
     /**
@@ -709,7 +706,6 @@ public class CustomContentProviderUtilsImplTest {
         Assert.assertEquals((double) latitude, location.getLatitude(), 0.01);
         Assert.assertEquals(time, location.getTime(), 0.01);
         Assert.assertEquals(speed, location.getSpeed(), 0.01);
-        verify(cursorMock);
     }
 
     /**

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

@@ -112,7 +112,7 @@ public abstract class AbstractTestFileTrackImporter {
      * @param lastTrack   true if it is the last track in the gpx
      * @param trackId     the track id
      */
-    protected void expectUpdateTrack(ArgumentCaptor<Track> trackCaptor, boolean lastTrack, long trackId) {
+    protected void expectTrackUpdate(ArgumentCaptor<Track> trackCaptor, boolean lastTrack, long trackId) {
         contentProviderUtils.updateTrack(trackCaptor.capture());
 
         when(contentProviderUtils.insertWaypoint((Waypoint) any())).thenReturn(WAYPOINT_ID_O_URI);

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

@@ -34,6 +34,7 @@ import de.dennisguse.opentracks.util.PreferencesUtils;
 import static org.mockito.Mockito.any;
 import static org.mockito.Mockito.anyInt;
 import static org.mockito.Mockito.anyLong;
+import static org.mockito.Mockito.atLeastOnce;
 import static org.mockito.Mockito.eq;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -84,8 +85,7 @@ public class GpxFileTrackImporterTest extends AbstractTestFileTrackImporter {
 
     @Test
     public void testOneTrackOneSegment() throws Exception {
-        ArgumentCaptor<Track> trackCaptor = ArgumentCaptor.forClass(Track.class);
+        // given
-
         Location location0 = createLocation(0, DATE_FORMAT_0.parse(TRACK_TIME_0).getTime());
         Location location1 = createLocation(1, DATE_FORMAT_1.parse(TRACK_TIME_1).getTime());
 
@@ -96,24 +96,27 @@ public class GpxFileTrackImporterTest extends AbstractTestFileTrackImporter {
         when(contentProviderUtils.bulkInsertTrackPoint((Location[]) any(), eq(1), eq(TRACK_ID_0))).thenReturn(1);
         when(contentProviderUtils.getLastTrackPointId(TRACK_ID_0)).thenReturn(TRACK_POINT_ID_1);
         when(contentProviderUtils.getTrack(PreferencesUtils.getLong(context, R.string.recording_track_id_key))).thenReturn(null);
-        expectUpdateTrack(trackCaptor, true, TRACK_ID_0);
+        ArgumentCaptor<Track> trackCaptor = ArgumentCaptor.forClass(Track.class);
+        expectTrackUpdate(trackCaptor, true, TRACK_ID_0);
 
+        // when
         InputStream inputStream = new ByteArrayInputStream(VALID_ONE_TRACK_ONE_SEGMENT_GPX.getBytes());
         GpxFileTrackImporter gpxFileTrackImporter = new GpxFileTrackImporter(context, contentProviderUtils);
         long trackId = gpxFileTrackImporter.importFile(inputStream);
+
+        // then
         Assert.assertEquals(TRACK_ID_0, trackId);
 
+        verify(contentProviderUtils, atLeastOnce()).updateTrack(trackCaptor.capture());
         long time0 = DATE_FORMAT_0.parse(TRACK_TIME_0).getTime();
         long time1 = DATE_FORMAT_1.parse(TRACK_TIME_1).getTime();
         Assert.assertEquals(time1 - time0, trackCaptor.getValue().getTripStatistics().getTotalTime());
-        verify(contentProviderUtils);
         verifyTrack(trackCaptor.getValue(), TRACK_NAME_0, TRACK_DESCRIPTION_0, time0);
     }
 
     @Test
     public void testOneTrackTwoSegments() throws Exception {
-        ArgumentCaptor<Track> trackCaptor = ArgumentCaptor.forClass(Track.class);
+        // given
-
         Location location0 = createLocation(0, DATE_FORMAT_0.parse(TRACK_TIME_0).getTime());
 
         when(contentProviderUtils.insertTrack((Track) any())).thenReturn(TRACK_ID_0_URI);
@@ -122,11 +125,17 @@ public class GpxFileTrackImporterTest extends AbstractTestFileTrackImporter {
         when(contentProviderUtils.bulkInsertTrackPoint((Location[]) any(), eq(5), eq(TRACK_ID_0))).thenReturn(5);
         when(contentProviderUtils.getLastTrackPointId(TRACK_ID_0)).thenReturn(TRACK_POINT_ID_3);
         when(contentProviderUtils.getTrack(PreferencesUtils.getLong(context, R.string.recording_track_id_key))).thenReturn(null);
-        expectUpdateTrack(trackCaptor, true, TRACK_ID_0);
 
+        ArgumentCaptor<Track> trackCaptor = ArgumentCaptor.forClass(Track.class);
+        expectTrackUpdate(trackCaptor, true, TRACK_ID_0);
+
+        // when
         InputStream inputStream = new ByteArrayInputStream(VALID_ONE_TRACK_TWO_SEGMENTS_GPX.getBytes());
         GpxFileTrackImporter gpxFileTrackImporter = new GpxFileTrackImporter(context, contentProviderUtils);
         long trackId = gpxFileTrackImporter.importFile(inputStream);
+
+        // then
+        verify(contentProviderUtils, atLeastOnce()).updateTrack(trackCaptor.capture());
         Assert.assertEquals(TRACK_ID_0, trackId);
 
         long time0 = DATE_FORMAT_0.parse(TRACK_TIME_0).getTime();
@@ -135,14 +144,12 @@ public class GpxFileTrackImporterTest extends AbstractTestFileTrackImporter {
         long time3 = DATE_FORMAT_1.parse(TRACK_TIME_3).getTime();
         Assert.assertEquals(time1 - time0 + time3 - time2, trackCaptor.getValue().getTripStatistics().getTotalTime());
 
-        verify(contentProviderUtils);
         verifyTrack(trackCaptor.getValue(), TRACK_NAME_0, TRACK_DESCRIPTION_0, DATE_FORMAT_0.parse(TRACK_TIME_0).getTime());
     }
 
     @Test
     public void testOneTrackTwoSegmentsNoTime() {
-        ArgumentCaptor<Track> trackCaptor = ArgumentCaptor.forClass(Track.class);
+        // given
-
         when(contentProviderUtils.insertTrack((Track) any())).thenReturn(TRACK_ID_0_URI);
         expectFirstTrackPoint(null, TRACK_ID_0, TRACK_POINT_ID_0);
 
@@ -150,15 +157,20 @@ public class GpxFileTrackImporterTest extends AbstractTestFileTrackImporter {
         when(contentProviderUtils.bulkInsertTrackPoint((Location[]) any(), eq(5), eq(TRACK_ID_0))).thenReturn(5);
         when(contentProviderUtils.getLastTrackPointId(TRACK_ID_0)).thenReturn(TRACK_POINT_ID_3);
         when(contentProviderUtils.getTrack(PreferencesUtils.getLong(context, R.string.recording_track_id_key))).thenReturn(null);
-        expectUpdateTrack(trackCaptor, true, TRACK_ID_0);
 
+        ArgumentCaptor<Track> trackCaptor = ArgumentCaptor.forClass(Track.class);
+        expectTrackUpdate(trackCaptor, true, TRACK_ID_0);
+
+        // when
         InputStream inputStream = new ByteArrayInputStream(VALID_ONE_TRACK_TWO_SEGMENTS_NO_TIME_GPX.getBytes());
         GpxFileTrackImporter gpxFileTrackImporter = new GpxFileTrackImporter(context, contentProviderUtils);
         long trackId = gpxFileTrackImporter.importFile(inputStream);
-        Assert.assertEquals(TRACK_ID_0, trackId);
-        Assert.assertEquals(0, trackCaptor.getValue().getTripStatistics().getTotalTime());
 
-        verify(contentProviderUtils);
+        // then
+        verify(contentProviderUtils, atLeastOnce()).updateTrack(trackCaptor.capture());
+        Assert.assertEquals(TRACK_ID_0, trackId);
+
+        Assert.assertEquals(0, trackCaptor.getValue().getTripStatistics().getTotalTime());
         verifyTrack(trackCaptor.getValue(), TRACK_NAME_0, TRACK_DESCRIPTION_0, -1L);
     }
 

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

@@ -32,6 +32,7 @@ import de.dennisguse.opentracks.content.Track;
 import de.dennisguse.opentracks.util.PreferencesUtils;
 
 import static org.mockito.Mockito.any;
+import static org.mockito.Mockito.atLeastOnce;
 import static org.mockito.Mockito.eq;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.when;
@@ -68,8 +69,7 @@ public class KmlFileTrackImporterTest extends AbstractTestFileTrackImporter {
 
     @Test
     public void testOneTrackOneSegment() throws Exception {
-        ArgumentCaptor<Track> trackCaptor = ArgumentCaptor.forClass(Track.class);
+        // given
-
         Location location0 = createLocation(0, DATE_FORMAT_0.parse(TRACK_TIME_0).getTime());
         Location location1 = createLocation(1, DATE_FORMAT_1.parse(TRACK_TIME_1).getTime());
 
@@ -77,27 +77,31 @@ public class KmlFileTrackImporterTest extends AbstractTestFileTrackImporter {
         expectFirstTrackPoint(location0, TRACK_ID_0, TRACK_POINT_ID_0);
 
         // A flush happens at the end
-        when(contentProviderUtils.bulkInsertTrackPoint(new Location[]{location1}, eq(1), eq(TRACK_ID_0))).thenReturn(1);
+        when(contentProviderUtils.bulkInsertTrackPoint((Location[]) any(), eq(1), eq(TRACK_ID_0))).thenReturn(1);
         when(contentProviderUtils.getLastTrackPointId(TRACK_ID_0)).thenReturn(TRACK_POINT_ID_1);
         when(contentProviderUtils.getTrack(PreferencesUtils.getLong(context, R.string.recording_track_id_key))).thenReturn(null);
-        expectUpdateTrack(trackCaptor, true, TRACK_ID_0);
 
+        ArgumentCaptor<Track> trackCaptor = ArgumentCaptor.forClass(Track.class);
+        expectTrackUpdate(trackCaptor, true, TRACK_ID_0);
+
+        // when
         InputStream inputStream = new ByteArrayInputStream(VALID_ONE_TRACK_ONE_SEGMENT_GPX.getBytes());
         KmlFileTrackImporter kmlFileTrackImporter = new KmlFileTrackImporter(context, TRACK_ID_0, contentProviderUtils);
         long trackId = kmlFileTrackImporter.importFile(inputStream);
+
+        // then
+        verify(contentProviderUtils, atLeastOnce()).updateTrack(trackCaptor.capture());
         Assert.assertEquals(TRACK_ID_0, trackId);
 
         long time0 = DATE_FORMAT_0.parse(TRACK_TIME_0).getTime();
         long time1 = DATE_FORMAT_1.parse(TRACK_TIME_1).getTime();
         Assert.assertEquals(time1 - time0, trackCaptor.getValue().getTripStatistics().getTotalTime());
-        verify(contentProviderUtils);
         verifyTrack(trackCaptor.getValue(), TRACK_NAME_0, TRACK_DESCRIPTION_0, time0);
     }
 
     @Test
     public void testOneTrackTwoSegments() throws Exception {
-        ArgumentCaptor<Track> trackCaptor = ArgumentCaptor.forClass(Track.class);
+        // given
-
         Location location0 = createLocation(0, DATE_FORMAT_0.parse(TRACK_TIME_0).getTime());
 
         contentProviderUtils.clearTrack(context, TRACK_ID_0);
@@ -107,11 +111,17 @@ public class KmlFileTrackImporterTest extends AbstractTestFileTrackImporter {
         when(contentProviderUtils.bulkInsertTrackPoint((Location[]) any(), eq(5), eq(TRACK_ID_0))).thenReturn(5);
         when(contentProviderUtils.getLastTrackPointId(TRACK_ID_0)).thenReturn(TRACK_POINT_ID_3);
         when(contentProviderUtils.getTrack(PreferencesUtils.getLong(context, R.string.recording_track_id_key))).thenReturn(null);
-        expectUpdateTrack(trackCaptor, true, TRACK_ID_0);
 
+        ArgumentCaptor<Track> trackCaptor = ArgumentCaptor.forClass(Track.class);
+        expectTrackUpdate(trackCaptor, true, TRACK_ID_0);
+
+        // when
         InputStream inputStream = new ByteArrayInputStream(VALID_ONE_TRACK_TWO_SEGMENTS_GPX.getBytes());
         KmlFileTrackImporter kmlFileTrackImporter = new KmlFileTrackImporter(context, TRACK_ID_0, contentProviderUtils);
         long trackId = kmlFileTrackImporter.importFile(inputStream);
+
+        // then
+        verify(contentProviderUtils, atLeastOnce()).updateTrack(trackCaptor.capture());
         Assert.assertEquals(TRACK_ID_0, trackId);
 
         long time0 = DATE_FORMAT_0.parse(TRACK_TIME_0).getTime();
@@ -120,7 +130,6 @@ public class KmlFileTrackImporterTest extends AbstractTestFileTrackImporter {
         long time3 = DATE_FORMAT_1.parse(TRACK_TIME_3).getTime();
         Assert.assertEquals(time1 - time0 + time3 - time2, trackCaptor.getValue().getTripStatistics().getTotalTime());
 
-        verify(contentProviderUtils);
         verifyTrack(trackCaptor.getValue(), TRACK_NAME_0, TRACK_DESCRIPTION_0, DATE_FORMAT_0.parse(TRACK_TIME_0).getTime());
     }
 }

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

@@ -15,14 +15,12 @@
  */
 package de.dennisguse.opentracks.services;
 
-import android.content.BroadcastReceiver;
 import android.content.ContentProvider;
 import android.content.Context;
 import android.content.Intent;
 import android.content.SharedPreferences;
 import android.location.Location;
 import android.os.IBinder;
-import android.util.Log;
 
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
@@ -38,7 +36,6 @@ import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
-import java.util.ArrayList;
 import java.util.List;
 import java.util.Random;
 import java.util.concurrent.TimeUnit;
@@ -77,9 +74,7 @@ public class TrackRecordingServiceTest {
     private long trackId = Math.abs(new Random().nextLong());
 
     static Intent createStartIntent(Context context) {
-        Intent startIntent = new Intent();
+        return new Intent(context, TrackRecordingService.class);
-        startIntent.setClass(context, TrackRecordingService.class);
-        return startIntent;
     }
 
     static void updateAutoResumePrefs(Context context, int attempts, int timeoutMins) {
@@ -145,7 +140,10 @@ public class TrackRecordingServiceTest {
         // Start the service in "resume" mode (simulates the on-reboot action).
         Intent startIntent = createStartIntent(context);
         startIntent.putExtra(TrackRecordingService.RESUME_TRACK_EXTRA_NAME, true);
+        mServiceRule.startService(startIntent);
         ITrackRecordingService service = ((ITrackRecordingService) mServiceRule.bindService(startIntent));
+
+        // then
         Assert.assertNotNull(service);
 
         // We expect to resume the previous track.
@@ -168,12 +166,14 @@ public class TrackRecordingServiceTest {
         Assert.assertEquals(id, PreferencesUtils.getLong(context, R.string.recording_track_id_key));
 
         // Start the service in "resume" mode (simulates the on-reboot action).
+
         Intent startIntent = createStartIntent(context);
         startIntent.putExtra(TrackRecordingService.RESUME_TRACK_EXTRA_NAME, true);
         mServiceRule.startService(startIntent);
         service = ((ITrackRecordingService) mServiceRule.bindService(createStartIntent(context)));
-        Assert.assertNotNull(service);
 
+        // then
+        Assert.assertNotNull(service);
         Assert.assertTrue(service.isRecording());
     }
 
@@ -189,7 +189,10 @@ public class TrackRecordingServiceTest {
         // Start the service in "resume" mode (simulates the on-reboot action).
         Intent startIntent = createStartIntent(context);
         startIntent.putExtra(TrackRecordingService.RESUME_TRACK_EXTRA_NAME, true);
+        mServiceRule.startService(startIntent);
         ITrackRecordingService service = ((ITrackRecordingService) mServiceRule.bindService(startIntent));
+
+        // then
         Assert.assertNotNull(service);
 
         // We don't expect to resume the previous track, because it was stopped.
@@ -201,7 +204,7 @@ public class TrackRecordingServiceTest {
     @Test
     public void testResumeAfterReboot_expiredTrack() throws Exception {
         // Insert a dummy track last updated 20 min ago.
-        createDummyTrack(trackId, System.currentTimeMillis() - 20 * 60 * 1000, true);
+        createDummyTrack(trackId, System.currentTimeMillis() - 1500 * 60 * 1000, true);
 
         // Clear the number of attempts and set the timeout to 10 min.
         updateAutoResumePrefs(context, PreferencesUtils.AUTO_RESUME_TRACK_CURRENT_RETRY_DEFAULT, PreferencesUtils.AUTO_RESUME_TRACK_TIMEOUT_DEFAULT);
@@ -209,7 +212,10 @@ public class TrackRecordingServiceTest {
         // Start the service in "resume" mode (simulates the on-reboot action).
         Intent startIntent = createStartIntent(context);
         startIntent.putExtra(TrackRecordingService.RESUME_TRACK_EXTRA_NAME, true);
+        mServiceRule.startService(startIntent);
         ITrackRecordingService service = ((ITrackRecordingService) mServiceRule.bindService(startIntent));
+
+        // then
         Assert.assertNotNull(service);
 
         // We don't expect to resume the previous track, because it has expired.
@@ -229,11 +235,10 @@ public class TrackRecordingServiceTest {
         // Start the service in "resume" mode (simulates the on-reboot action).
         Intent startIntent = createStartIntent(context);
         startIntent.putExtra(TrackRecordingService.RESUME_TRACK_EXTRA_NAME, true);
-
+        mServiceRule.startService(startIntent);
-        //Explicit start service, so `startCommand()` is executed - which would be called by BootReceiver.
-        context.startService(startIntent);
-
         ITrackRecordingService service = ((ITrackRecordingService) mServiceRule.bindService(startIntent));
+
+        //then
         Assert.assertNotNull(service);
 
         // We don't expect to resume the previous track, because there were already too many attempts.
@@ -247,7 +252,10 @@ public class TrackRecordingServiceTest {
         List<Track> tracks = providerUtils.getAllTracks();
         Assert.assertTrue(tracks.isEmpty());
 
-        ITrackRecordingService service = ((ITrackRecordingService) mServiceRule.bindService(createStartIntent(context)));
+        Intent startIntent = createStartIntent(context);
+        mServiceRule.startService(startIntent);
+        ITrackRecordingService service = ((ITrackRecordingService) mServiceRule.bindService(startIntent));
+
         // Test if we start in no-recording mode by default.
         Assert.assertFalse(service.isRecording());
         Assert.assertEquals(-1L, service.getRecordingTrackId());
@@ -266,11 +274,14 @@ public class TrackRecordingServiceTest {
     @MediumTest
     @Test
     public void testRecording_orphanedRecordingTrack() throws Exception {
+        Intent startIntent = createStartIntent(context);
+        ITrackRecordingService service = ((ITrackRecordingService) mServiceRule.bindService(startIntent));
+
         // Just set recording track to a bogus value.
+        // Make sure that the service will not start recording and will clear the bogus track.
         PreferencesUtils.setLong(context, R.string.recording_track_id_key, 123L);
 
-        // Make sure that the service will not start recording and will clear the bogus track.
+        // then
-        ITrackRecordingService service = ((ITrackRecordingService) mServiceRule.bindService(createStartIntent(context)));
         Assert.assertFalse(service.isRecording());
         Assert.assertEquals(PreferencesUtils.RECORDING_TRACK_ID_DEFAULT, service.getRecordingTrackId());
     }
@@ -405,45 +416,4 @@ public class TrackRecordingServiceTest {
         Assert.assertNotNull(wpt.getLocation());
         Assert.assertNull(wpt.getTripStatistics());
     }
-
-    /**
-     * Synchronous/waitable broadcast receiver to be used in testing.
-     */
-    private class BlockingBroadcastReceiver extends BroadcastReceiver {
-        private static final long MAX_WAIT_TIME_MS = 3000;
-        private final List<Intent> receivedIntents = new ArrayList<>();
-
-        public List<Intent> getReceivedIntents() {
-            return receivedIntents;
-        }
-
-        @Override
-        public void onReceive(Context ctx, Intent intent) {
-            Log.d("Test", "Got broadcast: " + intent);
-            synchronized (receivedIntents) {
-                receivedIntents.add(intent);
-                receivedIntents.notifyAll();
-            }
-        }
-
-        public boolean waitUntilReceived(int receiveCount) {
-            long deadline = System.currentTimeMillis() + MAX_WAIT_TIME_MS;
-            synchronized (receivedIntents) {
-                while (receivedIntents.size() < receiveCount) {
-                    try {
-                        // Wait releases synchronized lock until it returns
-                        receivedIntents.wait(500);
-                    } catch (InterruptedException e) {
-                        // Do nothing
-                    }
-
-                    if (System.currentTimeMillis() > deadline) {
-                        return false;
-                    }
-                }
-            }
-
-            return true;
-        }
-    }
 }

src/androidTest/java/de/dennisguse/opentracks/services/tasks/AnnouncementPeriodicTaskTest.java

@@ -1,557 +0,0 @@
-/*
- * Copyright 2010 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.services.tasks;
-
-import android.content.Context;
-import android.os.Looper;
-import android.speech.tts.TextToSpeech;
-import android.speech.tts.TextToSpeech.OnInitListener;
-import android.speech.tts.TextToSpeech.OnUtteranceCompletedListener;
-import android.telephony.PhoneStateListener;
-import android.telephony.TelephonyManager;
-
-import androidx.test.core.app.ApplicationProvider;
-
-import org.junit.After;
-import org.junit.AfterClass;
-import org.junit.Assert;
-import org.junit.Before;
-import org.junit.BeforeClass;
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.mockito.ArgumentCaptor;
-import org.mockito.Mock;
-import org.mockito.junit.MockitoJUnitRunner;
-
-import java.util.HashMap;
-import java.util.Locale;
-import java.util.concurrent.atomic.AtomicBoolean;
-
-import de.dennisguse.opentracks.stats.TripStatistics;
-
-import static org.mockito.Mockito.any;
-import static org.mockito.Mockito.eq;
-import static org.mockito.Mockito.reset;
-import static org.mockito.Mockito.same;
-import static org.mockito.Mockito.verify;
-import static org.mockito.Mockito.when;
-
-
-/**
- * Tests for {@link AnnouncementPeriodicTask}.
- *
- * WARNING: I'm not responsible if your eyes start bleeding while reading this code.
- * You have been warned.
- * It's still better than no test, though.
- *
- * @author Rodrigo Damazio
- */
-@RunWith(MockitoJUnitRunner.class)
-public class AnnouncementPeriodicTaskTest {
-
-    // Use something other than our hardcoded value
-    private static final Locale DEFAULT_LOCALE = Locale.KOREAN;
-    private static final String ANNOUNCEMENT = "I can haz cheeseburger?";
-    private Locale oldDefaultLocale;
-
-    private Context context = ApplicationProvider.getApplicationContext();
-
-    private AnnouncementPeriodicTask task;
-    @Mock
-    private AnnouncementPeriodicTask mockTask;
-    private ArgumentCaptor<OnInitListener> initListenerCapture = ArgumentCaptor.forClass(OnInitListener.class);
-    private ArgumentCaptor<PhoneStateListener> phoneListenerCapture = ArgumentCaptor.forClass(PhoneStateListener.class);
-    private TextToSpeechDelegate ttsDelegate;
-    @Mock
-    private TextToSpeechInterface tts;
-
-    @BeforeClass
-    public static void preSetUp() {
-        // Prepare looper for Android's message queue
-        if (Looper.myLooper() == null) Looper.prepare();
-    }
-
-    @AfterClass
-    public static void finalTearDown() {
-        if (Looper.myLooper() != null) Looper.myLooper().quit();
-    }
-
-    @Before
-    public void setUp() throws Exception {
-        oldDefaultLocale = Locale.getDefault();
-        Locale.setDefault(DEFAULT_LOCALE);
-
-        // Eww, the effort required just to mock TextToSpeech is insane
-        final AtomicBoolean listenerCalled = new AtomicBoolean();
-        OnInitListener blockingListener = new OnInitListener() {
-            @Override
-            public void onInit(int status) {
-                synchronized (this) {
-                    listenerCalled.set(true);
-                    notify();
-                }
-            }
-        };
-
-        ttsDelegate = new TextToSpeechDelegate(context, blockingListener);
-
-        // Wait for all async operations done in the constructor to finish.
-        synchronized (blockingListener) {
-            while (!listenerCalled.get()) {
-                // Releases the synchronized lock until we're woken up.
-                blockingListener.wait();
-            }
-        }
-
-        // Create a partial forwarding mock
-        task = new AnnouncementPeriodicTask(context) {
-            @Override
-            protected TextToSpeech newTextToSpeech(Context ctx, OnInitListener onInitListener) {
-                return mockTask.newTextToSpeech(ctx, onInitListener);
-            }
-
-            @Override
-            protected String getAnnouncement(TripStatistics stats) {
-                return mockTask.getAnnouncement(stats);
-            }
-
-            @Override
-            protected void listenToPhoneState(PhoneStateListener listener, int events) {
-                mockTask.listenToPhoneState(listener, events);
-            }
-        };
-    }
-
-    @After
-    public void tearDown() {
-        Locale.setDefault(oldDefaultLocale);
-    }
-
-    @Test
-    public void testStart() {
-        doStart();
-        OnInitListener ttsInitListener = initListenerCapture.getValue();
-        Assert.assertNotNull(ttsInitListener);
-
-        ttsInitListener.onInit(TextToSpeech.SUCCESS);
-        //TODO
-        //verify(mockTask, tts);
-    }
-
-    @Test
-    public void testStart_notReady() {
-        doStart();
-        OnInitListener ttsInitListener = initListenerCapture.getValue();
-        Assert.assertNotNull(ttsInitListener);
-
-        ttsInitListener.onInit(TextToSpeech.ERROR);
-        //TODO
-        //AndroidMock.verify(mockTask, tts);
-    }
-
-    @Test
-    public void testShutdown() {
-        // First, start
-        doStart();
-        verify(mockTask);
-        reset(mockTask);
-
-        // Then, shut down
-        PhoneStateListener phoneListener = phoneListenerCapture.getValue();
-        mockTask.listenToPhoneState(
-                same(phoneListener), eq(PhoneStateListener.LISTEN_NONE));
-        tts.shutdown();
-        task.shutdown();
-        //TODO
-        //AndroidMock.verify(mockTask, tts);
-    }
-
-    @Test
-    public void testRun() {
-        // when service data calls
-        TripStatistics stats = new TripStatistics();
-
-        // when announcement building call
-        when(mockTask.getAnnouncement(same(stats))).thenReturn(ANNOUNCEMENT);
-
-        // Put task in "ready" state
-        startTask(TextToSpeech.SUCCESS);
-
-        when(tts.isLanguageAvailable(DEFAULT_LOCALE)).thenReturn(TextToSpeech.LANG_AVAILABLE);
-        when(tts.setLanguage(DEFAULT_LOCALE)).thenReturn(TextToSpeech.LANG_AVAILABLE);
-        when(tts.setSpeechRate(AnnouncementPeriodicTask.TTS_SPEECH_RATE)).thenReturn(TextToSpeech.SUCCESS);
-        when(tts.setOnUtteranceCompletedListener((OnUtteranceCompletedListener) any())).thenReturn(0);
-
-        // Run the announcement
-        task.announce(stats);
-        //TODO
-        //AndroidMock.verify(mockTask, tts);
-    }
-
-    @Test
-    public void testRun_notReady() {
-        // Put task in "not ready" state
-        startTask(TextToSpeech.ERROR);
-
-        // Run the announcement
-        task.run(null);
-        //TODO
-        //verify(mockTask, tts);
-    }
-
-    @Test
-    public void testRun_duringCall() {
-        startTask(TextToSpeech.SUCCESS);
-
-        when(tts.isSpeaking()).thenReturn(false);
-
-        // Run the announcement
-        PhoneStateListener phoneListener = phoneListenerCapture.getValue();
-        phoneListener.onCallStateChanged(TelephonyManager.CALL_STATE_OFFHOOK, null);
-        task.run(null);
-        //TODO
-        //verify(mockTask, tts);
-    }
-
-    @Test
-    public void testRun_ringWhileSpeaking() {
-        startTask(TextToSpeech.SUCCESS);
-
-        when(tts.isSpeaking()).thenReturn(true);
-        when(tts.stop()).thenReturn(TextToSpeech.SUCCESS);
-
-        // Update the state to ringing - this should stop the current announcement.
-        PhoneStateListener phoneListener = phoneListenerCapture.getValue();
-        phoneListener.onCallStateChanged(TelephonyManager.CALL_STATE_RINGING, null);
-
-        // Run the announcement - this should do nothing.
-        task.run(null);
-        //TODO
-        //AndroidMock.verify(mockTask, tts);
-    }
-
-    @Test
-    public void testRun_whileRinging() {
-        startTask(TextToSpeech.SUCCESS);
-
-        when(tts.isSpeaking()).thenReturn(false);
-
-        // Run the announcement
-        PhoneStateListener phoneListener = phoneListenerCapture.getValue();
-        phoneListener.onCallStateChanged(TelephonyManager.CALL_STATE_RINGING, null);
-        task.run(null);
-        //TODO
-        //AndroidMock.verify(mockTask, tts);
-    }
-
-    @Test
-    public void testRun_noService() {
-        startTask(TextToSpeech.SUCCESS);
-
-        // Run the announcement
-        task.run(null);
-        //TODO
-        //AndroidMock.verify(mockTask, tts);
-    }
-
-    @Test
-    public void testRun_noStats() {
-        // when service data calls
-
-        startTask(TextToSpeech.SUCCESS);
-
-        // Run the announcement
-        task.run(null);
-        //TODO
-        //AndroidMock.verify(mockTask, tts);
-    }
-
-    /**
-     * Tests {@link AnnouncementPeriodicTask#getAnnounceTime(long)} with time zero.
-     */
-    @Test
-    public void testGetAnnounceTime_time_zero() {
-        long time = 0; // 0 seconds
-        Assert.assertEquals("0 minutes 0 seconds", task.getAnnounceTime(time));
-    }
-
-    /**
-     * Tests {@link AnnouncementPeriodicTask#getAnnounceTime(long)} with time one.
-     */
-    @Test
-    public void testGetAnnounceTime_time_one() {
-        long time = 1000; // 1 second
-        Assert.assertEquals("0 minutes 1 second", task.getAnnounceTime(time));
-    }
-
-    /**
-     * Tests {@link AnnouncementPeriodicTask#getAnnounceTime(long)} with singular
-     * numbers with the hour unit.
-     */
-    @Test
-    public void testGetAnnounceTime_singular_has_hour() {
-        long time = (60 * 60 * 1000) + (60 * 1000) + (1000); // 1 hour 1 minute 1 second
-        Assert.assertEquals("1 hour 1 minute 1 second", task.getAnnounceTime(time));
-    }
-
-    /**
-     * Tests {@link AnnouncementPeriodicTask#getAnnounceTime(long)} with plural numbers
-     * with the hour unit.
-     */
-    @Test
-    public void testGetAnnounceTime_plural_has_hour() {
-        long time = (2 * 60 * 60 * 1000) + (2 * 60 * 1000) + (2 * 1000); // 2 hours 2 minutes 2 seconds
-        Assert.assertEquals("2 hours 2 minutes 2 seconds", task.getAnnounceTime(time));
-    }
-
-    /**
-     * Tests {@link AnnouncementPeriodicTask#getAnnounceTime(long)} with singular
-     * numbers without the hour unit.
-     */
-    @Test
-    public void testGetAnnounceTime_singular_no_hour() {
-        long time = (1 * 60 * 1000) + (1 * 1000); // 1 minute 1 second
-        Assert.assertEquals("1 minute 1 second", task.getAnnounceTime(time));
-    }
-
-    /**
-     * Tests {@link AnnouncementPeriodicTask#getAnnounceTime(long)} with plural numbers
-     * without the hour unit.
-     */
-    @Test
-    public void testGetAnnounceTime_plural_no_hour() {
-        long time = (2 * 60 * 1000) + (2 * 1000); // 2 minutes 2 seconds
-        Assert.assertEquals("2 minutes 2 seconds", task.getAnnounceTime(time));
-    }
-
-    private void startTask(int state) {
-        reset(tts);
-        doStart();
-        OnInitListener ttsInitListener = initListenerCapture.getValue();
-        ttsInitListener.onInit(state);
-        //TODO
-        reset(tts);
-        //AndroidMock.resetToDefault(tts);
-    }
-
-    private void doStart() {
-        mockTask.listenToPhoneState(phoneListenerCapture.capture(), eq(PhoneStateListener.LISTEN_CALL_STATE));
-        when(mockTask.newTextToSpeech(same(context), initListenerCapture.capture())).thenReturn(ttsDelegate);
-
-        task.start();
-    }
-
-    /**
-     * Mockable interface that we delegate TTS calls to.
-     */
-    interface TextToSpeechInterface {
-        int addEarcon(String earcon, String packagename, int resourceId);
-
-        int addEarcon(String earcon, String filename);
-
-        int addSpeech(String text, String packagename, int resourceId);
-
-        int addSpeech(String text, String filename);
-
-        boolean areDefaultsEnforced();
-
-        String getDefaultEngine();
-
-        Locale getLanguage();
-
-        int isLanguageAvailable(Locale loc);
-
-        boolean isSpeaking();
-
-        int playEarcon(String earcon, int queueMode,
-                       HashMap<String, String> params);
-
-        int playSilence(long durationInMs, int queueMode, HashMap<String, String> params);
-
-        int setLanguage(Locale loc);
-
-        int setOnUtteranceCompletedListener(OnUtteranceCompletedListener listener);
-
-        int setPitch(float pitch);
-
-        int setSpeechRate(float speechRate);
-
-        void shutdown();
-
-        int speak(String text, int queueMode, HashMap<String, String> params);
-
-        int stop();
-
-        int synthesizeToFile(String text, HashMap<String, String> params, String filename);
-    }
-
-    /**
-     * Subclass of {@link TextToSpeech} which delegates calls to the interface
-     * above.
-     * The logic here is stupid and the author is ashamed of having to write it
-     * like this, but basically the issue is that TextToSpeech cannot be mocked
-     * without running its constructor, its constructor runs async operations
-     * which call other methods (and then if the methods are part of a mock we'd
-     * have to set a behavior, but we can't 'cause the object hasn't been fully
-     * built yet).
-     * The logic is that calls made during the constructor (when tts is not yet
-     * set) will go up to the original class, but after tts is set we'll forward
-     * them all to the mock.
-     */
-    private class TextToSpeechDelegate extends TextToSpeech implements TextToSpeechInterface {
-        public TextToSpeechDelegate(Context context, OnInitListener listener) {
-            super(context, listener);
-        }
-
-        @Override
-        public int addEarcon(String earcon, String packagename, int resourceId) {
-            if (tts == null) {
-                return super.addEarcon(earcon, packagename, resourceId);
-            }
-            return tts.addEarcon(earcon, packagename, resourceId);
-        }
-
-        @Override
-        public int addEarcon(String earcon, String filename) {
-            if (tts == null) {
-                return super.addEarcon(earcon, filename);
-            }
-            return tts.addEarcon(earcon, filename);
-        }
-
-        @Override
-        public int addSpeech(String text, String packagename, int resourceId) {
-            if (tts == null) {
-                return super.addSpeech(text, packagename, resourceId);
-            }
-            return tts.addSpeech(text, packagename, resourceId);
-        }
-
-        @Override
-        public int addSpeech(String text, String filename) {
-            if (tts == null) {
-                return super.addSpeech(text, filename);
-            }
-            return tts.addSpeech(text, filename);
-        }
-
-        @Override
-        public Locale getLanguage() {
-            if (tts == null) {
-                return super.getLanguage();
-            }
-            return tts.getLanguage();
-        }
-
-        @Override
-        public int isLanguageAvailable(Locale loc) {
-            if (tts == null) {
-                return super.isLanguageAvailable(loc);
-            }
-            return tts.isLanguageAvailable(loc);
-        }
-
-        @Override
-        public boolean isSpeaking() {
-            if (tts == null) {
-                return super.isSpeaking();
-            }
-            return tts.isSpeaking();
-        }
-
-        @Override
-        public int playEarcon(String earcon, int queueMode, HashMap<String, String> params) {
-            if (tts == null) {
-                return super.playEarcon(earcon, queueMode, params);
-            }
-            return tts.playEarcon(earcon, queueMode, params);
-        }
-
-        @Override
-        public int playSilence(long durationInMs, int queueMode, HashMap<String, String> params) {
-            if (tts == null) {
-                return super.playSilence(durationInMs, queueMode, params);
-            }
-            return tts.playSilence(durationInMs, queueMode, params);
-        }
-
-        @Override
-        public int setLanguage(Locale loc) {
-            if (tts == null) {
-                return super.setLanguage(loc);
-            }
-            return tts.setLanguage(loc);
-        }
-
-        @Override
-        public int setOnUtteranceCompletedListener(OnUtteranceCompletedListener listener) {
-            if (tts == null) {
-                return super.setOnUtteranceCompletedListener(listener);
-            }
-            return tts.setOnUtteranceCompletedListener(listener);
-        }
-
-        @Override
-        public int setPitch(float pitch) {
-            if (tts == null) {
-                return super.setPitch(pitch);
-            }
-            return tts.setPitch(pitch);
-        }
-
-        @Override
-        public int setSpeechRate(float speechRate) {
-            if (tts == null) {
-                return super.setSpeechRate(speechRate);
-            }
-            return tts.setSpeechRate(speechRate);
-        }
-
-        @Override
-        public void shutdown() {
-            if (tts == null) {
-                super.shutdown();
-                return;
-            }
-            tts.shutdown();
-        }
-
-        @Override
-        public int speak(
-                String text, int queueMode, HashMap<String, String> params) {
-            if (tts == null) {
-                return super.speak(text, queueMode, params);
-            }
-            return tts.speak(text, queueMode, params);
-        }
-
-        @Override
-        public int stop() {
-            if (tts == null) {
-                return super.stop();
-            }
-            return tts.stop();
-        }
-
-        @Override
-        public int synthesizeToFile(String text, HashMap<String, String> params, String filename) {
-            if (tts == null) {
-                return super.synthesizeToFile(text, params, filename);
-            }
-            return tts.synthesizeToFile(text, params, filename);
-        }
-    }
-}

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

@@ -131,7 +131,7 @@ public class StringUtilsTest {
         assertGetTime("2010-05-04T03:02:01.3", 2010, 5, 4, 3, 2, 1, 300);
         assertGetTime("2010-05-04T03:02:01.35", 2010, 5, 4, 3, 2, 1, 350);
         assertGetTime("2010-05-04T03:02:01.352Z", 2010, 5, 4, 3, 2, 1, 352);
-        assertGetTime("2010-05-04T03:02:01.3525Z", 2010, 5, 4, 3, 2, 1, 352);
+        assertGetTime("2010-05-04T03:02:01.3529Z", 2010, 5, 4, 3, 2, 1, 353);
     }
 
     /**
@@ -149,8 +149,7 @@ public class StringUtilsTest {
     }
 
     /**
-     * Tests {@link StringUtils#getTime(String)} with fractional seconds and time
+     * Tests {@link StringUtils#getTime(String)} with fractional seconds and time zone.
-     * zone.
      */
     @Test
     public void testGetTime_fractionalAndTimezone() {
@@ -183,7 +182,7 @@ public class StringUtilsTest {
      * Tests {@link StringUtils#getTimeParts(long)} with a positive number.
      */
     @Test
-    public void testGetTimeParts_postive() {
+    public void testGetTimeParts_positive() {
         int[] parts = StringUtils.getTimeParts(61000);
         Assert.assertEquals(1, parts[0]);
         Assert.assertEquals(1, parts[1]);
@@ -200,4 +199,24 @@ public class StringUtilsTest {
         Assert.assertEquals(-1, parts[1]);
         Assert.assertEquals(0, parts[2]);
     }
+
+    @Test
+    public void testFormatDecimal() {
+        Assert.assertEquals("0", StringUtils.formatDecimal(0.0, 0));
+        Assert.assertEquals("0", StringUtils.formatDecimal(0.1, 0));
+        Assert.assertEquals("1", StringUtils.formatDecimal(1.1, 0));
+        Assert.assertEquals("10", StringUtils.formatDecimal(10, 0));
+        Assert.assertEquals("10", StringUtils.formatDecimal(10.1, 0));
+        Assert.assertEquals("0", StringUtils.formatDecimal(-0.1, 0));
+
+        Assert.assertEquals("0", StringUtils.formatDecimal(0.0, 2));
+        Assert.assertEquals("0.1", StringUtils.formatDecimal(0.1, 2));
+        Assert.assertEquals("1.1", StringUtils.formatDecimal(1.1, 2));
+        Assert.assertEquals("10", StringUtils.formatDecimal(10, 2));
+        Assert.assertEquals("10.1", StringUtils.formatDecimal(10.1, 2));
+        Assert.assertEquals("10.11", StringUtils.formatDecimal(10.111, 2));
+        Assert.assertEquals("-0.1", StringUtils.formatDecimal(-0.1, 2));
+
+        Assert.assertEquals("1", StringUtils.formatDecimal(0.99, 1));
+    }
 }

src/main/AndroidManifest.xml

@@ -16,8 +16,8 @@ limitations under the License.
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="de.dennisguse.opentracks"
     android:installLocation="auto"
-    android:versionCode="3054"
+    android:versionCode="3101"
-    android:versionName="v3.2.0"> <!-- For FDroid. -->
+    android:versionName="v3.2.3"> <!-- For FDroid. -->
     <!-- Permission to initialize services -->
     <application
         android:name=".Startup"
@@ -30,10 +30,6 @@ limitations under the License.
         <!-- Activities -->
         <activity android:name=".AboutActivity" />
 
-        <activity
-            android:name=".AggregatedStatsActivity"
-            android:label="@string/menu_aggregated_statistics" />
-
         <activity android:name=".DeleteActivity" />
 
         <activity
@@ -97,12 +93,8 @@ limitations under the License.
             android:name=".io.file.exporter.ExportActivity"
             android:theme="@style/ThemeCustomTransparent" />
 
-        <activity android:name=".settings.RecordingSettingsActivity" />
-
         <activity android:name=".settings.SettingsActivity" />
 
-        <activity android:name=".settings.StatsSettingsActivity" />
-
         <!-- Services -->
         <provider
             android:name=".content.ShareContentProvider"
@@ -128,7 +120,6 @@ limitations under the License.
         </receiver>
 
         <!-- Providers -->
-
         <service
             android:name=".services.TrackRecordingService"
             android:enabled="true"

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

@@ -19,12 +19,13 @@ package de.dennisguse.opentracks;
 import android.os.Bundle;
 import android.speech.tts.TextToSpeech;
 
-import androidx.fragment.app.FragmentActivity;
+import androidx.appcompat.app.AppCompatActivity;
+import androidx.appcompat.widget.Toolbar;
 
 /**
  * @author Jimmy Shih
  */
-public abstract class AbstractActivity extends FragmentActivity {
+public abstract class AbstractActivity extends AppCompatActivity {
 
     @Override
     protected void onCreate(Bundle savedInstanceState) {
@@ -34,6 +35,9 @@ public abstract class AbstractActivity extends FragmentActivity {
         setVolumeControlStream(TextToSpeech.Engine.DEFAULT_STREAM);
 
         setContentView(getLayoutResId());
+
+        Toolbar toolbar = findViewById(R.id.toolbar);
+        setSupportActionBar(toolbar);
     }
 
     /**

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

@@ -16,24 +16,7 @@
 
 package de.dennisguse.opentracks;
 
-import android.app.Activity;
-import android.app.SearchManager;
-import android.content.ComponentName;
-import android.content.Context;
 import android.content.Intent;
-import android.util.Log;
-import android.util.SparseBooleanArray;
-import android.view.ActionMode;
-import android.view.Menu;
-import android.view.MenuItem;
-import android.view.View;
-import android.widget.AbsListView;
-import android.widget.ListView;
-import android.widget.SearchView;
-
-import androidx.annotation.NonNull;
-
-import java.util.ArrayList;
 
 import de.dennisguse.opentracks.fragments.ConfirmDeleteDialogFragment;
 import de.dennisguse.opentracks.fragments.ConfirmDeleteDialogFragment.ConfirmDeleteCaller;
@@ -58,115 +41,6 @@ public abstract class AbstractListActivity extends AbstractActivity implements C
     protected static final int GPS_REQUEST_CODE = 6;
     private static final int DELETE_REQUEST_CODE = 3;
 
-    public static void configureListViewContextualMenu(final ListView listView, final ContextualActionModeCallback contextualActionModeCallback) {
-        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
-        listView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
-
-            @Override
-            public boolean onCreateActionMode(ActionMode mode, Menu menu) {
-                mode.getMenuInflater().inflate(R.menu.list_context_menu, menu);
-                return true;
-            }
-
-            @Override
-            public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
-                contextualActionModeCallback.onPrepare(menu, getCheckedPositions(listView), listView.getCheckedItemIds(), true);
-                return true;
-            }
-
-            @Override
-            public void onDestroyActionMode(ActionMode mode) {
-                // Do nothing
-            }
-
-            @Override
-            public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
-                mode.invalidate();
-            }
-
-            @Override
-            public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
-                if (contextualActionModeCallback.onClick(item.getItemId(), getCheckedPositions(listView), listView.getCheckedItemIds())) {
-                    mode.finish();
-                }
-                return true;
-            }
-
-            /**
-             * Gets the checked positions in a list view.
-             *
-             * @param list the list view
-             */
-            private int[] getCheckedPositions(ListView list) {
-                SparseBooleanArray positions = list.getCheckedItemPositions();
-                ArrayList<Integer> arrayList = new ArrayList<>();
-                for (int i = 0; i < positions.size(); i++) {
-                    int key = positions.keyAt(i);
-                    if (positions.valueAt(i)) {
-                        arrayList.add(key);
-                    }
-                }
-                int[] result = new int[arrayList.size()];
-                for (int i = 0; i < arrayList.size(); i++) {
-                    result[i] = arrayList.get(i);
-                }
-                return result;
-            }
-        });
-    }
-
-    public static void configureSearchWidget(Activity activity, final MenuItem menuItem, final TrackController trackController) {
-        final SearchView searchView = (SearchView) menuItem.getActionView();
-        SearchManager searchManager = (SearchManager) activity.getSystemService(Context.SEARCH_SERVICE);
-        if (searchManager != null) {
-            //NOTE: for some reason activity.getComponentName() did not trigger the SearchListActivity
-            searchView.setSearchableInfo(searchManager.getSearchableInfo(new ComponentName(activity, SearchListActivity.class)));
-        } else {
-            Log.w(TAG, "Could not retrieve SearchManager.");
-        }
-        searchView.setQueryRefinementEnabled(true);
-        searchView.setSubmitButtonEnabled(true);
-        searchView.setOnQueryTextFocusChangeListener(new View.OnFocusChangeListener() {
-
-            @Override
-            public void onFocusChange(View v, boolean hasFocus) {
-                // Hide and show trackController when searchable widget has focus/no focus
-                if (trackController != null) {
-                    if (hasFocus) {
-                        trackController.hide();
-                    } else {
-                        trackController.show();
-                    }
-                }
-            }
-        });
-
-        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
-            @Override
-            public boolean onQueryTextSubmit(String query) {
-                menuItem.collapseActionView();
-                return false;
-            }
-
-            @Override
-            public boolean onQueryTextChange(String newText) {
-                return false;
-            }
-        });
-        searchView.setOnSuggestionListener(new SearchView.OnSuggestionListener() {
-            @Override
-            public boolean onSuggestionSelect(int position) {
-                return false;
-            }
-
-            @Override
-            public boolean onSuggestionClick(int position) {
-                menuItem.collapseActionView();
-                return false;
-            }
-        });
-    }
-
     @Override
     protected void onActivityResult(int requestCode, int resultCode, Intent data) {
         if (requestCode == DELETE_REQUEST_CODE) {
@@ -182,8 +56,7 @@ public abstract class AbstractListActivity extends AbstractActivity implements C
      * @param trackIds the track ids
      */
     protected void deleteTracks(long[] trackIds) {
-        ConfirmDeleteDialogFragment.newInstance(trackIds)
+        ConfirmDeleteDialogFragment.showDialog(getSupportFragmentManager(), trackIds);
-                .show(getSupportFragmentManager(), ConfirmDeleteDialogFragment.CONFIRM_DELETE_DIALOG_TAG);
     }
 
     @Override
@@ -209,10 +82,9 @@ public abstract class AbstractListActivity extends AbstractActivity implements C
     }
 
     /**
-     * Gets the track recording service connection. For stopping the current
+     * Gets the track recording service connection.
-     * recording if need to delete the current recording track.
+     * For stopping the current recording if need to delete the current recording track.
      */
-    @NonNull
     abstract protected TrackRecordingServiceConnection getTrackRecordingServiceConnection();
 
     /**

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

@@ -1,62 +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;
-
-import android.os.Bundle;
-
-import java.util.List;
-
-import de.dennisguse.opentracks.content.ContentProviderUtils;
-import de.dennisguse.opentracks.content.Track;
-import de.dennisguse.opentracks.stats.TripStatistics;
-import de.dennisguse.opentracks.util.StatsUtils;
-
-/**
- * An activity to view aggregated stats from all recorded tracks.
- *
- * @author Fergus Nelson
- */
-public class AggregatedStatsActivity extends AbstractActivity {
-
-    @Override
-    protected void onCreate(Bundle savedInstanceState) {
-        super.onCreate(savedInstanceState);
-        StatsUtils.setTripStatisticsValues(this, getTripStatistics(), null);
-        StatsUtils.setLocationValues(this, null, false);
-    }
-
-    @Override
-    protected int getLayoutResId() {
-        return R.layout.stats;
-    }
-
-    /**
-     * Gets the aggregated trip statistics for all the recorded tracks or null if
-     * there is no track.
-     */
-    private TripStatistics getTripStatistics() {
-        List<Track> tracks = ContentProviderUtils.Factory.get(this).getAllTracks();
-        TripStatistics tripStatistics = null;
-        if (!tracks.isEmpty()) {
-            tripStatistics = new TripStatistics(tracks.iterator().next().getTripStatistics());
-            for (int i = 1; i < tracks.size(); i++) {
-                tripStatistics.merge(tracks.get(i).getTripStatistics());
-            }
-        }
-        return tripStatistics;
-    }
-}

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

@@ -223,8 +223,8 @@ public class ChartView extends View {
     }
 
     /**
-     * Sets chart by distance. It is expected that after changing this value, data
+     * Sets chart by distance.
-     * will be reloaded.
+     * It is expected that after changing this value, data will be reloaded.
      *
      * @param value true for by distance, false for by time
      */

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

@@ -22,14 +22,11 @@ import android.content.SharedPreferences;
 import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
 import android.database.Cursor;
 import android.os.Bundle;
-import android.view.ContextMenu;
-import android.view.ContextMenu.ContextMenuInfo;
 import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.AdapterView;
-import android.widget.AdapterView.AdapterContextMenuInfo;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.ListView;
 
@@ -46,6 +43,7 @@ import de.dennisguse.opentracks.content.Waypoint.WaypointType;
 import de.dennisguse.opentracks.content.WaypointsColumns;
 import de.dennisguse.opentracks.fragments.DeleteMarkerDialogFragment;
 import de.dennisguse.opentracks.fragments.DeleteMarkerDialogFragment.DeleteMarkerCaller;
+import de.dennisguse.opentracks.util.ActivityUtils;
 import de.dennisguse.opentracks.util.IntentUtils;
 import de.dennisguse.opentracks.util.ListItemUtils;
 import de.dennisguse.opentracks.util.PreferencesUtils;
@@ -175,7 +173,7 @@ public class MarkerListActivity extends AbstractActivity implements DeleteMarker
             }
         };
         listView.setAdapter(resourceCursorAdapter);
-        AbstractListActivity.configureListViewContextualMenu(listView, contextualActionModeCallback);
+        ActivityUtils.configureListViewContextualMenu(listView, contextualActionModeCallback);
 
         LoaderManager.getInstance(this).initLoader(0, null, new LoaderCallbacks<Cursor>() {
             @NonNull
@@ -234,7 +232,7 @@ public class MarkerListActivity extends AbstractActivity implements DeleteMarker
         insertMarkerMenuItem = menu.findItem(R.id.marker_list_insert_marker);
 
         searchMenuItem = menu.findItem(R.id.marker_list_search);
-        AbstractListActivity.configureSearchWidget(this, searchMenuItem, null);
+        ActivityUtils.configureSearchWidget(this, searchMenuItem, null);
 
         return super.onCreateOptionsMenu(menu);
     }
@@ -256,24 +254,6 @@ public class MarkerListActivity extends AbstractActivity implements DeleteMarker
         return super.onOptionsItemSelected(item);
     }
 
-    @Override
-    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
-        super.onCreateContextMenu(menu, v, menuInfo);
-        getMenuInflater().inflate(R.menu.list_context_menu, menu);
-
-        AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
-        contextualActionModeCallback.onPrepare(menu, new int[]{info.position}, new long[]{info.id}, false);
-    }
-
-    @Override
-    public boolean onContextItemSelected(MenuItem item) {
-        AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
-        if (handleContextItem(item.getItemId(), new long[]{info.id})) {
-            return true;
-        }
-        return super.onContextItemSelected(item);
-    }
-
     /**
      * Handles a context item selection.
      *
@@ -300,8 +280,7 @@ public class MarkerListActivity extends AbstractActivity implements DeleteMarker
                 if (markerIds.length > 1 && markerIds.length == listView.getCount()) {
                     markerIds = new long[]{-1L};
                 }
-                DeleteMarkerDialogFragment.newInstance(markerIds)
+                DeleteMarkerDialogFragment.showDialog(getSupportFragmentManager(), markerIds);
-                        .show(getSupportFragmentManager(), DeleteMarkerDialogFragment.DELETE_MARKER_DIALOG_TAG);
                 return true;
             case R.id.list_context_menu_select_all:
                 int size = listView.getCount();

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

@@ -22,14 +22,11 @@ import android.content.SharedPreferences;
 import android.content.SharedPreferences.OnSharedPreferenceChangeListener;
 import android.os.Bundle;
 import android.util.Log;
-import android.view.ContextMenu;
-import android.view.ContextMenu.ContextMenuInfo;
 import android.view.KeyEvent;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 import android.widget.AdapterView;
-import android.widget.AdapterView.AdapterContextMenuInfo;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.ArrayAdapter;
 import android.widget.ListView;
@@ -55,6 +52,7 @@ import de.dennisguse.opentracks.fragments.DeleteMarkerDialogFragment;
 import de.dennisguse.opentracks.fragments.DeleteMarkerDialogFragment.DeleteMarkerCaller;
 import de.dennisguse.opentracks.services.TrackRecordingServiceConnection;
 import de.dennisguse.opentracks.stats.TripStatistics;
+import de.dennisguse.opentracks.util.ActivityUtils;
 import de.dennisguse.opentracks.util.IntentUtils;
 import de.dennisguse.opentracks.util.ListItemUtils;
 import de.dennisguse.opentracks.util.PreferencesUtils;
@@ -109,28 +107,29 @@ public class SearchListActivity extends AbstractListActivity implements DeleteMa
     private ContextualActionModeCallback contextualActionModeCallback = new ContextualActionModeCallback() {
         @Override
         public void onPrepare(Menu menu, int[] positions, long[] ids, boolean showSelectAll) {
-            boolean isRecording = recordingTrackId != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT;
+            boolean isRecording = PreferencesUtils.isRecording(recordingTrackId);
             boolean isSingleSelection = positions.length == 1;
+
             boolean isSingleSelectionTrack;
             if (isSingleSelection) {
                 Map<String, Object> item = arrayAdapter.getItem(positions[0]);
-                Long trackId = (Long) item.get(TRACK_ID_FIELD);
-                Track track = contentProviderUtils.getTrack(trackId);
-
                 isSingleSelectionTrack = item.get(MARKER_ID_FIELD) == null;
             } else {
                 isSingleSelectionTrack = false;
             }
+
             // Not recording, one item, item is a track
-            menu.findItem(R.id.list_context_menu_share).setVisible(!isRecording && isSingleSelection && isSingleSelectionTrack);
+            MenuItem shareMenuItem = menu.findItem(R.id.list_context_menu_share);
-            //TODO Setup shareIntent.
+            if (isSingleSelectionTrack) {
+                shareMenuItem.setVisible(!isRecording);
+            }
 
             // One item, item is a marker
             menu.findItem(R.id.list_context_menu_show_on_map).setVisible(isSingleSelection && !isSingleSelectionTrack);
             // One item, can be a track or a marker
             menu.findItem(R.id.list_context_menu_edit).setVisible(isSingleSelection);
             // One item. If track, no restriction.
-            menu.findItem(R.id.list_context_menu_delete).setVisible(isSingleSelection && (isSingleSelectionTrack));
+            menu.findItem(R.id.list_context_menu_delete).setVisible(isSingleSelection && isSingleSelectionTrack);
             // Disable select all, no action is available for multiple selection
             menu.findItem(R.id.list_context_menu_select_all).setVisible(false);
         }
@@ -222,7 +221,7 @@ public class SearchListActivity extends AbstractListActivity implements DeleteMa
                 startActivity(intent);
             }
         });
-        AbstractListActivity.configureListViewContextualMenu(listView, contextualActionModeCallback);
+        ActivityUtils.configureListViewContextualMenu(listView, contextualActionModeCallback);
         handleIntent(getIntent());
     }
 
@@ -259,24 +258,6 @@ public class SearchListActivity extends AbstractListActivity implements DeleteMa
         handleIntent(intent);
     }
 
-    @Override
-    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
-        super.onCreateContextMenu(menu, v, menuInfo);
-        getMenuInflater().inflate(R.menu.list_context_menu, menu);
-
-        AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
-        contextualActionModeCallback.onPrepare(menu, new int[]{info.position}, new long[]{info.id}, false);
-    }
-
-    @Override
-    public boolean onContextItemSelected(MenuItem item) {
-        AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
-        if (handleContextItem(item.getItemId(), new int[]{info.position})) {
-            return true;
-        }
-        return super.onContextItemSelected(item);
-    }
-
     @Override
     public boolean onKeyUp(int keyCode, KeyEvent event) {
         if (keyCode == KeyEvent.KEYCODE_SEARCH) {
@@ -301,13 +282,14 @@ public class SearchListActivity extends AbstractListActivity implements DeleteMa
         Long markerId = (Long) item.get(MARKER_ID_FIELD);
         Intent intent;
         switch (itemId) {
-            case R.id.list_context_menu_share:
-                //TODO
-                Log.e(TAG, "Not implemented");
-                return true;
             case R.id.list_context_menu_show_on_map:
                 IntentUtils.showCoordinateOnMap(this, (double) item.get(MARKER_LATITUDE_FIELD), (double) item.get(MARKER_LONGITUDE_FIELD), item.get(NAME_FIELD) + "");
                 return true;
+            case R.id.list_context_menu_share:
+                intent = IntentUtils.newShareFileIntent(this, new long[]{trackId});
+                intent = Intent.createChooser(intent, null);
+                startActivity(intent);
+                return true;
             case R.id.list_context_menu_edit:
                 if (markerId != null) {
                     intent = IntentUtils.newIntent(this, MarkerEditActivity.class)
@@ -323,7 +305,7 @@ public class SearchListActivity extends AbstractListActivity implements DeleteMa
                 return true;
             case R.id.list_context_menu_delete:
                 if (markerId != null) {
-                    DeleteMarkerDialogFragment.newInstance(new long[]{markerId}).show(getSupportFragmentManager(), DeleteMarkerDialogFragment.DELETE_MARKER_DIALOG_TAG);
+                    DeleteMarkerDialogFragment.showDialog(getSupportFragmentManager(), new long[]{markerId});
                 } else {
                     deleteTracks(new long[]{trackId});
                 }

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

@@ -130,11 +130,11 @@ public class TrackController {
         handlerUpdateTotalTime.removeCallbacks(updateTotalTimeRunnable);
     }
 
-    void hide() {
+    public void hide() {
         containerView.setVisibility(View.GONE);
     }
 
-    void show() {
+    public void show() {
         containerView.setVisibility(View.VISIBLE);
     }
 

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

@@ -31,7 +31,6 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.view.WindowManager;
-import android.widget.ShareActionProvider;
 import android.widget.TabHost;
 import android.widget.TabHost.TabSpec;
 import android.widget.Toast;
@@ -48,7 +47,6 @@ import de.dennisguse.opentracks.content.Waypoint.WaypointType;
 import de.dennisguse.opentracks.content.WaypointCreationRequest;
 import de.dennisguse.opentracks.fragments.ChartFragment;
 import de.dennisguse.opentracks.fragments.ChooseActivityTypeDialogFragment;
-import de.dennisguse.opentracks.fragments.ChooseActivityTypeDialogFragment.ChooseActivityTypeCaller;
 import de.dennisguse.opentracks.fragments.ConfirmDeleteDialogFragment;
 import de.dennisguse.opentracks.fragments.FrequencyDialogFragment;
 import de.dennisguse.opentracks.fragments.StatsFragment;
@@ -66,7 +64,7 @@ import de.dennisguse.opentracks.util.TrackUtils;
  * @author Leif Hendrik Wilden
  * @author Rodrigo Damazio
  */
-public class TrackDetailActivity extends AbstractListActivity implements ChooseActivityTypeCaller, ConfirmDeleteDialogFragment.ConfirmDeleteCaller {
+public class TrackDetailActivity extends AbstractListActivity implements ChooseActivityTypeDialogFragment.ChooseActivityTypeCaller, ConfirmDeleteDialogFragment.ConfirmDeleteCaller {
 
     public static final String EXTRA_TRACK_ID = "track_id";
     public static final String EXTRA_MARKER_ID = "marker_id";
@@ -317,11 +315,7 @@ public class TrackDetailActivity extends AbstractListActivity implements ChooseA
         insertMarkerMenuItem = menu.findItem(R.id.track_detail_insert_marker);
         insertPhotoMenuItem = menu.findItem(R.id.track_detail_insert_photo);
         insertPhotoMenuItem.setVisible(new Intent(MediaStore.ACTION_IMAGE_CAPTURE).resolveActivity(getPackageManager()) != null);
-
         shareMenuItem = menu.findItem(R.id.track_detail_share);
-        ShareActionProvider shareActionProvider = (ShareActionProvider) shareMenuItem.getActionProvider();
-        shareActionProvider.setShareIntent(IntentUtils.newShareFileIntent(this, new long[]{trackId}));
-
         voiceFrequencyMenuItem = menu.findItem(R.id.track_detail_voice_frequency);
         splitFrequencyMenuItem = menu.findItem(R.id.track_detail_split_frequency);
         markerListMenuItem = menu.findItem(R.id.track_detail_markers);
@@ -345,6 +339,11 @@ public class TrackDetailActivity extends AbstractListActivity implements ChooseA
                         .putExtra(MarkerEditActivity.EXTRA_TRACK_ID, trackId);
                 startActivity(intent);
                 return true;
+            case R.id.track_detail_share:
+                intent = IntentUtils.newShareFileIntent(this, new long[]{trackId});
+                intent = Intent.createChooser(intent, null);
+                startActivity(intent);
+                return true;
             case R.id.track_detail_insert_photo:
                 if (!FileUtils.isExternalStorageWriteable() || ActivityCompat.checkSelfPermission(this, Manifest.permission.WRITE_EXTERNAL_STORAGE) == PackageManager.PERMISSION_DENIED) {
                     ActivityCompat.requestPermissions(this, new String[]{Manifest.permission.WRITE_EXTERNAL_STORAGE}, EXTERNAL_STORAGE_PERMISSION_REQUEST_CODE);
@@ -361,12 +360,10 @@ public class TrackDetailActivity extends AbstractListActivity implements ChooseA
                 startActivity(intent);
                 return true;
             case R.id.track_detail_voice_frequency:
-                FrequencyDialogFragment.newInstance(R.string.voice_frequency_key, PreferencesUtils.VOICE_FREQUENCY_DEFAULT, R.string.menu_voice_frequency)
+                FrequencyDialogFragment.showDialog(getSupportFragmentManager(), R.string.voice_frequency_key, PreferencesUtils.VOICE_FREQUENCY_DEFAULT, R.string.menu_voice_frequency);
-                        .show(getSupportFragmentManager(), FrequencyDialogFragment.FREQUENCY_DIALOG_TAG);
                 return true;
             case R.id.track_detail_split_frequency:
-                FrequencyDialogFragment.newInstance(R.string.split_frequency_key, PreferencesUtils.SPLIT_FREQUENCY_DEFAULT, R.string.menu_split_frequency)
+                FrequencyDialogFragment.showDialog(getSupportFragmentManager(), R.string.split_frequency_key, PreferencesUtils.SPLIT_FREQUENCY_DEFAULT, R.string.menu_split_frequency);
-                        .show(getSupportFragmentManager(), FrequencyDialogFragment.FREQUENCY_DIALOG_TAG);
                 return true;
             case R.id.track_detail_edit:
                 intent = IntentUtils.newIntent(this, TrackEditActivity.class)
@@ -395,6 +392,7 @@ public class TrackDetailActivity extends AbstractListActivity implements ChooseA
             }
             return;
         }
+
         super.onRequestPermissionsResult(requestCode, permissions, grantResults);
     }
 
@@ -487,7 +485,7 @@ public class TrackDetailActivity extends AbstractListActivity implements ChooseA
     }
 
     public void chooseActivityType(String category) {
-        ChooseActivityTypeDialogFragment.newInstance(category).show(getSupportFragmentManager(), ChooseActivityTypeDialogFragment.CHOOSE_ACTIVITY_TYPE_DIALOG_TAG);
+        ChooseActivityTypeDialogFragment.showDialog(getSupportFragmentManager(), category);
     }
 
     @Override

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

@@ -28,10 +28,11 @@ import android.widget.Button;
 import android.widget.EditText;
 import android.widget.Spinner;
 
+import androidx.annotation.NonNull;
+
 import de.dennisguse.opentracks.content.ContentProviderUtils;
 import de.dennisguse.opentracks.content.Track;
 import de.dennisguse.opentracks.fragments.ChooseActivityTypeDialogFragment;
-import de.dennisguse.opentracks.fragments.ChooseActivityTypeDialogFragment.ChooseActivityTypeCaller;
 import de.dennisguse.opentracks.services.TrackRecordingServiceConnection;
 import de.dennisguse.opentracks.util.TrackIconUtils;
 import de.dennisguse.opentracks.util.TrackUtils;
@@ -41,7 +42,7 @@ import de.dennisguse.opentracks.util.TrackUtils;
  *
  * @author Leif Hendrik Wilden
  */
-public class TrackEditActivity extends AbstractActivity implements ChooseActivityTypeCaller {
+public class TrackEditActivity extends AbstractActivity implements ChooseActivityTypeDialogFragment.ChooseActivityTypeCaller {
 
     public static final String EXTRA_TRACK_ID = "track_id";
     public static final String EXTRA_NEW_TRACK = "new_track";
@@ -119,9 +120,7 @@ public class TrackEditActivity extends AbstractActivity implements ChooseActivit
             @Override
             public boolean onTouch(View v, MotionEvent event) {
                 if (event.getAction() == MotionEvent.ACTION_UP) {
-                    ChooseActivityTypeDialogFragment.newInstance(activityType.getText().toString()).show(
+                    ChooseActivityTypeDialogFragment.showDialog(getSupportFragmentManager(), activityType.getText().toString());
-                            getSupportFragmentManager(),
-                            ChooseActivityTypeDialogFragment.CHOOSE_ACTIVITY_TYPE_DIALOG_TAG);
                 }
                 return true;
             }
@@ -130,9 +129,7 @@ public class TrackEditActivity extends AbstractActivity implements ChooseActivit
             @Override
             public boolean onKey(View v, int keyCode, KeyEvent event) {
                 if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {
-                    ChooseActivityTypeDialogFragment.newInstance(activityType.getText().toString()).show(
+                    ChooseActivityTypeDialogFragment.showDialog(getSupportFragmentManager(), activityType.getText().toString());
-                            getSupportFragmentManager(),
-                            ChooseActivityTypeDialogFragment.CHOOSE_ACTIVITY_TYPE_DIALOG_TAG);
                 }
                 return true;
             }
@@ -182,7 +179,7 @@ public class TrackEditActivity extends AbstractActivity implements ChooseActivit
     }
 
     @Override
-    public void onSaveInstanceState(Bundle outState) {
+    public void onSaveInstanceState(@NonNull Bundle outState) {
         super.onSaveInstanceState(outState);
         outState.putString(ICON_VALUE_KEY, iconValue);
     }

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

@@ -28,8 +28,6 @@ import android.location.LocationManager;
 import android.os.Bundle;
 import android.provider.Settings;
 import android.util.Log;
-import android.view.ContextMenu;
-import android.view.ContextMenu.ContextMenuInfo;
 import android.view.Gravity;
 import android.view.KeyEvent;
 import android.view.Menu;
@@ -37,14 +35,12 @@ import android.view.MenuItem;
 import android.view.View;
 import android.view.View.OnClickListener;
 import android.widget.AdapterView;
-import android.widget.AdapterView.AdapterContextMenuInfo;
 import android.widget.AdapterView.OnItemClickListener;
 import android.widget.ListView;
-import android.widget.SearchView;
-import android.widget.ShareActionProvider;
 import android.widget.Toast;
 
 import androidx.annotation.NonNull;
+import androidx.appcompat.widget.SearchView;
 import androidx.core.app.ActivityCompat;
 import androidx.cursoradapter.widget.ResourceCursorAdapter;
 import androidx.loader.app.LoaderManager;
@@ -60,9 +56,11 @@ import de.dennisguse.opentracks.fragments.ConfirmDeleteDialogFragment;
 import de.dennisguse.opentracks.services.ITrackRecordingService;
 import de.dennisguse.opentracks.services.TrackRecordingServiceConnection;
 import de.dennisguse.opentracks.settings.SettingsActivity;
+import de.dennisguse.opentracks.util.ActivityUtils;
 import de.dennisguse.opentracks.util.IntentUtils;
 import de.dennisguse.opentracks.util.ListItemUtils;
 import de.dennisguse.opentracks.util.PreferencesUtils;
+import de.dennisguse.opentracks.util.ServiceUtils;
 import de.dennisguse.opentracks.util.StringUtils;
 import de.dennisguse.opentracks.util.TrackIconUtils;
 import de.dennisguse.opentracks.util.TrackUtils;
@@ -117,10 +115,6 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
         public void onPrepare(Menu menu, int[] positions, long[] trackIds, boolean showSelectAll) {
             boolean isSingleSelection = trackIds.length == 1;
 
-            MenuItem shareMenuItem = menu.findItem(R.id.list_context_menu_share);
-            ShareActionProvider shareActionProvider = (ShareActionProvider) shareMenuItem.getActionProvider();
-            shareActionProvider.setShareIntent(trackIds.length == 0 ? null : IntentUtils.newShareFileIntent(TrackListActivity.this, trackIds));
-
             menu.findItem(R.id.list_context_menu_edit).setVisible(isSingleSelection);
             menu.findItem(R.id.list_context_menu_select_all).setVisible(showSelectAll);
         }
@@ -148,7 +142,7 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
                     PreferencesUtils.getKey(TrackListActivity.this, R.string.recording_track_id_key))) {
                 recordingTrackId = PreferencesUtils.getLong(
                         TrackListActivity.this, R.string.recording_track_id_key);
-                if (key != null && recordingTrackId != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT) {
+                if (key != null && PreferencesUtils.isRecording(recordingTrackId)) {
                     trackRecordingServiceConnection.startAndBind();
                 }
             }
@@ -164,7 +158,7 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
                     public void run() {
                         TrackListActivity.this.invalidateOptionsMenu();
                         LoaderManager.getInstance(TrackListActivity.this).restartLoader(0, null, loaderCallbacks);
-                        boolean isRecording = recordingTrackId != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT;
+                        boolean isRecording = PreferencesUtils.isRecording(recordingTrackId);
                         trackController.update(isRecording, recordingTrackPaused);
                     }
                 });
@@ -175,7 +169,6 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
     // Menu items
     private MenuItem searchMenuItem;
     private MenuItem startGpsMenuItem;
-    private MenuItem aggregatedStatisticsMenuItem;
     private MenuItem deleteAllMenuItem;
 
     private final OnClickListener stopListener = new OnClickListener() {
@@ -200,7 +193,7 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
             runOnUiThread(new Runnable() {
                 @Override
                 public void run() {
-                    trackController.update(recordingTrackId != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT, recordingTrackPaused);
+                    trackController.update(PreferencesUtils.isRecording(recordingTrackId), recordingTrackPaused);
                 }
             });
 
@@ -317,7 +310,8 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
             }
         };
         listView.setAdapter(resourceCursorAdapter);
-        AbstractListActivity.configureListViewContextualMenu(listView, contextualActionModeCallback);
+
+        ActivityUtils.configureListViewContextualMenu(listView, contextualActionModeCallback);
 
         LoaderManager.getInstance(this).initLoader(0, null, loaderCallbacks);
         showStartupDialogs();
@@ -339,8 +333,7 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
         // Update UI
         this.invalidateOptionsMenu();
         LoaderManager.getInstance(this).restartLoader(0, null, loaderCallbacks);
-        boolean isRecording = recordingTrackId != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT;
+        trackController.onResume(PreferencesUtils.isRecording(recordingTrackId), recordingTrackPaused);
-        trackController.onResume(isRecording, recordingTrackPaused);
     }
 
     @Override
@@ -380,10 +373,9 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
         getMenuInflater().inflate(R.menu.track_list, menu);
 
         searchMenuItem = menu.findItem(R.id.track_list_search);
-        AbstractListActivity.configureSearchWidget(this, searchMenuItem, trackController);
+        ActivityUtils.configureSearchWidget(this, searchMenuItem, trackController);
 
         startGpsMenuItem = menu.findItem(R.id.track_list_start_gps);
-        aggregatedStatisticsMenuItem = menu.findItem(R.id.track_list_aggregated_statistics);
         deleteAllMenuItem = menu.findItem(R.id.track_list_delete_all);
 
         return super.onCreateOptionsMenu(menu);
@@ -391,14 +383,13 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
 
     @Override
     public boolean onPrepareOptionsMenu(Menu menu) {
-        boolean isGpsStarted = TrackRecordingServiceConnection.isRecordingServiceRunning(this);
+        boolean isGpsStarted = ServiceUtils.isTrackRecordingServiceRunning(this);
-        boolean isRecording = recordingTrackId != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT;
+        boolean isRecording = PreferencesUtils.isRecording(recordingTrackId);
         updateMenuItems(isGpsStarted, isRecording);
 
-        View searchView = searchMenuItem.getActionView();
+        SearchView searchView = (SearchView) searchMenuItem.getActionView();
-        if (searchView instanceof SearchView) {
+        searchView.setQuery("", false);
-            ((SearchView) searchView).setQuery("", false);
+
-        }
         return super.onPrepareOptionsMenu(menu);
     }
 
@@ -412,7 +403,7 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
                     intent = new Intent(Settings.ACTION_LOCATION_SOURCE_SETTINGS);
                     startActivity(intent);
                 } else {
-                    startGps = !TrackRecordingServiceConnection.isRecordingServiceRunning(this);
+                    startGps = !ServiceUtils.isTrackRecordingServiceRunning(this);
 
                     // Show toast
                     Toast toast = Toast.makeText(this, startGps ? R.string.gps_starting : R.string.gps_stopping, Toast.LENGTH_SHORT);
@@ -439,10 +430,6 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
                 intent = IntentUtils.newIntent(this, MarkerListActivity.class);
                 startActivity(intent);
                 return true;
-            case R.id.track_list_aggregated_statistics:
-                intent = IntentUtils.newIntent(this, AggregatedStatsActivity.class);
-                startActivity(intent);
-                return true;
             case R.id.track_list_delete_all:
                 deleteTracks(new long[]{-1L});
                 return true;
@@ -454,24 +441,6 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
         return super.onOptionsItemSelected(item);
     }
 
-    @Override
-    public void onCreateContextMenu(ContextMenu menu, View v, ContextMenuInfo menuInfo) {
-        super.onCreateContextMenu(menu, v, menuInfo);
-        getMenuInflater().inflate(R.menu.list_context_menu, menu);
-
-        AdapterContextMenuInfo info = (AdapterContextMenuInfo) menuInfo;
-        contextualActionModeCallback.onPrepare(menu, new int[]{info.position}, new long[]{info.id}, false);
-    }
-
-    @Override
-    public boolean onContextItemSelected(MenuItem item) {
-        AdapterContextMenuInfo info = (AdapterContextMenuInfo) item.getMenuInfo();
-        if (handleContextItem(item.getItemId(), new long[]{info.id})) {
-            return true;
-        }
-        return super.onContextItemSelected(item);
-    }
-
     @Override
     public boolean onKeyUp(int keyCode, KeyEvent event) {
         if (keyCode == KeyEvent.KEYCODE_SEARCH && searchMenuItem != null) {
@@ -531,9 +500,6 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
                 startGpsMenuItem.setIcon(isGpsStarted ? R.drawable.ic_gps_fixed_24dp : R.drawable.ic_gps_off_24dp);
             }
         }
-        if (aggregatedStatisticsMenuItem != null) {
-            aggregatedStatisticsMenuItem.setVisible(hasTrack);
-        }
         if (deleteAllMenuItem != null) {
             deleteAllMenuItem.setVisible(hasTrack && !isRecording);
         }
@@ -562,12 +528,18 @@ public class TrackListActivity extends AbstractListActivity implements ConfirmDe
      * @return true if handled.
      */
     private boolean handleContextItem(int itemId, long[] trackIds) {
+        Intent intent;
         switch (itemId) {
             case R.id.list_context_menu_show_on_map:
                 IntentUtils.showTrackOnMap(this, 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 intent = IntentUtils.newIntent(this, TrackEditActivity.class)
+                intent = IntentUtils.newIntent(this, TrackEditActivity.class)
                         .putExtra(TrackEditActivity.EXTRA_TRACK_ID, trackIds[0]);
                 startActivity(intent);
                 return true;

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

@@ -208,7 +208,7 @@ public class TrackDataHub implements DataSourceListener {
      * Returns true if the selected track is recording.
      */
     public boolean isSelectedTrackRecording() {
-        return selectedTrackId == recordingTrackId && recordingTrackId != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT;
+        return selectedTrackId == recordingTrackId && PreferencesUtils.isRecording(recordingTrackId);
     }
 
     /**

src/main/java/de/dennisguse/opentracks/content/sensor/SensorDataSet.java

@@ -2,7 +2,7 @@ package de.dennisguse.opentracks.content.sensor;
 
 public final class SensorDataSet {
 
-    public static final float DATA_UNAVAILABLE = Integer.MAX_VALUE;
+    public static final float DATA_UNAVAILABLE = Float.NaN;
 
     //TODO It might be necessary to consider: sensor if sensor was connected as well.
     public String sensorName;
@@ -40,7 +40,7 @@ public final class SensorDataSet {
     }
 
     public boolean hasHeartRate() {
-        return heartRate != DATA_UNAVAILABLE;
+        return !Float.isNaN(heartRate) && heartRate > 0;
     }
 
     public float getHeartRate() {
@@ -48,7 +48,7 @@ public final class SensorDataSet {
     }
 
     public boolean hasCadence() {
-        return cadence != DATA_UNAVAILABLE;
+        return !Float.isNaN(cadence);
     }
 
     public float getCadence() {
@@ -56,7 +56,7 @@ public final class SensorDataSet {
     }
 
     public boolean hasPower() {
-        return power != DATA_UNAVAILABLE;
+        return !Float.isNaN(power);
     }
 
     public float getPower() {
@@ -77,7 +77,7 @@ public final class SensorDataSet {
     }
 
     public boolean hasBatteryLevel() {
-        return batteryLevel != DATA_UNAVAILABLE;
+        return !Float.isNaN(batteryLevel);
     }
 
     public float getBatteryLevel() {

src/main/java/de/dennisguse/opentracks/content/sensor/SensorState.java

@@ -8,6 +8,7 @@ public enum SensorState {
     NONE,
     CONNECTING,
     CONNECTED,
+    DISCONNECTING,
     DISCONNECTED;
 
     public static String getStateAsString(SensorState state, Context c) {
@@ -18,6 +19,8 @@ public enum SensorState {
                 return c.getString(R.string.sensor_state_connecting);
             case CONNECTED:
                 return c.getString(R.string.sensor_state_connected);
+            case DISCONNECTING:
+                return c.getString(R.string.sensor_state_disconnected);
             case DISCONNECTED:
                 return c.getString(R.string.sensor_state_disconnected);
             default:

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

@@ -352,8 +352,8 @@ public class ChartFragment extends Fragment implements TrackDataListener {
     }
 
     /**
-     * Resumes the trackDataHub. Needs to be synchronized because trackDataHub can
+     * Resumes the trackDataHub.
-     * be accessed by multiple threads.
+     * Needs to be synchronized because trackDataHub can be accessed by multiple threads.
      */
     private synchronized void resumeTrackDataHub() {
         trackDataHub = ((TrackDetailActivity) getActivity()).getTrackDataHub();
@@ -363,8 +363,8 @@ public class ChartFragment extends Fragment implements TrackDataListener {
     }
 
     /**
-     * Pauses the trackDataHub. Needs to be synchronized because trackDataHub can
+     * Pauses the trackDataHub.
-     * be accessed by multiple threads.
+     * Needs to be synchronized because trackDataHub can be accessed by multiple threads.
      */
     private synchronized void pauseTrackDataHub() {
         trackDataHub.unregisterTrackDataListener(this);
@@ -372,16 +372,16 @@ public class ChartFragment extends Fragment implements TrackDataListener {
     }
 
     /**
-     * Returns true if the selected track is recording. Needs to be synchronized
+     * Returns true if the selected track is recording.
-     * because trackDataHub can be accessed by multiple threads.
+     * Needs to be synchronized because trackDataHub can be accessed by multiple threads.
      */
     private synchronized boolean isSelectedTrackRecording() {
         return trackDataHub != null && trackDataHub.isSelectedTrackRecording();
     }
 
     /**
-     * Reloads the trackDataHub. Needs to be synchronized because trackDataHub can
+     * Reloads the trackDataHub.
-     * be accessed by multiple threads.
+     * Needs to be synchronized because trackDataHub can be accessed by multiple threads.
      */
     private synchronized void reloadTrackDataHub() {
         if (trackDataHub != null) {
@@ -389,18 +389,12 @@ public class ChartFragment extends Fragment implements TrackDataListener {
         }
     }
 
-    /**
-     * To zoom in.
-     */
     private void zoomIn() {
         chartView.zoomIn();
         zoomControls.setIsZoomInEnabled(chartView.canZoomIn());
         zoomControls.setIsZoomOutEnabled(chartView.canZoomOut());
     }
 
-    /**
-     * To zoom out.
-     */
     private void zoomOut() {
         chartView.zoomOut();
         zoomControls.setIsZoomInEnabled(chartView.canZoomIn());
@@ -438,9 +432,6 @@ public class ChartFragment extends Fragment implements TrackDataListener {
         double elevation = Double.NaN;
         double speed = Double.NaN;
         double pace = Double.NaN;
-        double heartRate = Double.NaN;
-        double cadence = Double.NaN;
-        double power = Double.NaN;
 
         if (tripStatisticsUpdater != null) {
             tripStatisticsUpdater.addLocation(location, recordingDistanceInterval);
@@ -466,6 +457,10 @@ public class ChartFragment extends Fragment implements TrackDataListener {
             }
             pace = speed == 0 ? 0.0 : 60.0 / speed;
         }
+
+        double heartRate = Double.NaN;
+        double cadence = Double.NaN;
+        double power = Double.NaN;
         if (location instanceof SensorDataSetLocation && ((SensorDataSetLocation) location).getSensorDataSet() != null) {
             SensorDataSet sensorDataSet = ((SensorDataSetLocation) location).getSensorDataSet();
             if (sensorDataSet.hasHeartRate()) {
@@ -479,6 +474,7 @@ public class ChartFragment extends Fragment implements TrackDataListener {
             }
         }
 
+        //TODO: Is related to ChartView.ELEVATION_SERIES etc.
         if (data != null) {
             data[0] = timeOrDistance;
             data[1] = elevation;

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

@@ -1,34 +1,18 @@
-/*
- * Copyright 2013 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.fragments;
 
-import android.app.AlertDialog;
+import android.app.Activity;
 import android.app.Dialog;
 import android.content.Context;
-import android.content.DialogInterface;
 import android.os.Bundle;
 import android.view.LayoutInflater;
 import android.view.View;
+import android.view.ViewGroup;
 import android.widget.AdapterView;
-import android.widget.AdapterView.OnItemClickListener;
 import android.widget.GridView;
 
 import androidx.annotation.NonNull;
 import androidx.fragment.app.DialogFragment;
+import androidx.fragment.app.FragmentManager;
 
 import java.util.ArrayList;
 import java.util.List;
@@ -38,56 +22,13 @@ import de.dennisguse.opentracks.util.TrackIconUtils;
 
 /**
  * A DialogFragment to choose an activity type.
- *
- * @author apoorvn
  */
-public class ChooseActivityTypeDialogFragment extends DialogFragment {
+public class ChooseActivityTypeDialogFragment extends DialogFragment implements AdapterView.OnItemClickListener {
 
-    public static final String CHOOSE_ACTIVITY_TYPE_DIALOG_TAG = "chooseActivityType";
+    private static final String CHOOSE_ACTIVITY_TYPE_DIALOG_TAG = "chooseActivityType";
-    private static final String KEY_CATEGORY = "category";
-    private ChooseActivityTypeCaller caller;
 
-    public static ChooseActivityTypeDialogFragment newInstance(String category) {
+    public static void showDialog(FragmentManager fragmentManager, String preselectedCategory) {
-        Bundle bundle = new Bundle();
+        new ChooseActivityTypeDialogFragment(preselectedCategory).show(fragmentManager, ChooseActivityTypeDialogFragment.CHOOSE_ACTIVITY_TYPE_DIALOG_TAG);
-        bundle.putString(KEY_CATEGORY, category);
-
-        ChooseActivityTypeDialogFragment fragment = new ChooseActivityTypeDialogFragment();
-        fragment.setArguments(bundle);
-        return fragment;
-    }
-
-    public static Dialog getDialog(final Context context, final String category, final ChooseActivityTypeCaller caller) {
-        View view = LayoutInflater.from(context).inflate(R.layout.choose_activity_type, null);
-        GridView gridView = view.findViewById(R.id.choose_activity_type_grid_view);
-
-        List<Integer> imageIds = new ArrayList<>();
-        for (String iconValue : TrackIconUtils.getAllIconValues()) {
-            imageIds.add(TrackIconUtils.getIconDrawable(iconValue));
-        }
-
-        final ChooseActivityTypeImageAdapter imageAdapter = new ChooseActivityTypeImageAdapter(imageIds);
-        gridView.setAdapter(imageAdapter);
-
-        final AlertDialog alertDialog = new AlertDialog.Builder(context).setTitle(R.string.track_edit_activity_type_hint).setView(view).create();
-        alertDialog.setOnShowListener(new DialogInterface.OnShowListener() {
-            @Override
-            public void onShow(DialogInterface dialog) {
-                int position = getPosition(context, category);
-                if (position != -1) {
-                    imageAdapter.setSelected(position);
-                    imageAdapter.notifyDataSetChanged();
-                }
-            }
-        });
-
-        gridView.setOnItemClickListener(new OnItemClickListener() {
-            @Override
-            public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
-                caller.onChooseActivityTypeDone(TrackIconUtils.getAllIconValues().get(position));
-                alertDialog.dismiss();
-            }
-        });
-        return alertDialog;
     }
 
     private static int getPosition(Context context, String category) {
@@ -99,32 +40,79 @@ public class ChooseActivityTypeDialogFragment extends DialogFragment {
         return TrackIconUtils.getAllIconValues().indexOf(iconValue);
     }
 
-    @Override
+    private String preselectedCategory;
-    public void onAttach(@NonNull Context context) {
+
-        super.onAttach(context);
+    private ChooseActivityTypeCaller chooseActivityTypeCaller;
-        try {
+
-            caller = (ChooseActivityTypeCaller) context;
+    private ChooseActivityTypeDialogFragment(String preselectedCategory) {
-        } catch (ClassCastException e) {
+        this.preselectedCategory = preselectedCategory;
-            throw new ClassCastException(context + " must implement " + ChooseActivityTypeCaller.class.getSimpleName());
-        }
     }
 
     @NonNull
     @Override
     public Dialog onCreateDialog(Bundle savedInstanceState) {
-        return getDialog(getActivity(), getArguments().getString(KEY_CATEGORY), caller);
+        Dialog dialog = super.onCreateDialog(savedInstanceState);
+        dialog.setTitle(R.string.track_edit_activity_type_hint);
+        return dialog;
+    }
+
+    @Override
+    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
+        View view = inflater.inflate(R.layout.choose_activity_type, container);
+        GridView gridView = view.findViewById(R.id.choose_activity_type_grid_view);
+
+        List<Integer> imageIds = new ArrayList<>();
+        for (String iconValue : TrackIconUtils.getAllIconValues()) {
+            imageIds.add(TrackIconUtils.getIconDrawable(iconValue));
+        }
+
+        final ChooseActivityTypeImageAdapter imageAdapter = new ChooseActivityTypeImageAdapter(imageIds);
+        gridView.setAdapter(imageAdapter);
+
+        int position = getPosition(getContext(), preselectedCategory);
+        if (position != -1) {
+            imageAdapter.setSelected(position);
+            imageAdapter.notifyDataSetChanged();
+        }
+
+        gridView.setOnItemClickListener(this);
+        return view;
     }
 
     /**
-     * Interface for caller of this dialog fragment.
+     * TODO: Only used by obsolete Androidx preferences. Remove when onAttach(Context) is called.
-     *
+     */
-     * @author apoorvn
+    @Override
+    public void onAttach(@NonNull Activity activity) {
+        super.onAttach(activity);
+        try {
+            chooseActivityTypeCaller = (ChooseActivityTypeCaller) activity;
+        } catch (ClassCastException e) {
+            throw new ClassCastException(activity + " must implement " + ChooseActivityTypeCaller.class.getSimpleName());
+        }
+    }
+
+    public void onAttach(@NonNull Context context) {
+        super.onAttach(context);
+        try {
+            chooseActivityTypeCaller = (ChooseActivityTypeCaller) context;
+        } catch (ClassCastException e) {
+            throw new ClassCastException(context + " must implement " + ChooseActivityTypeCaller.class.getSimpleName());
+        }
+    }
+
+
+    @Override
+    public void onItemClick(AdapterView<?> adapterView, View view, int position, long id) {
+        chooseActivityTypeCaller.onChooseActivityTypeDone(TrackIconUtils.getAllIconValues().get(position));
+        dismiss();
+    }
+
+    /**
+     * Interface for chooseActivityTypeCaller of this dialog fragment.
      */
     public interface ChooseActivityTypeCaller {
 
-        /**
-         * Called when choose activity type is done.
-         */
         void onChooseActivityTypeDone(String iconValue);
     }
 }

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

@@ -23,6 +23,7 @@ import android.os.Bundle;
 
 import androidx.annotation.NonNull;
 import androidx.fragment.app.DialogFragment;
+import androidx.fragment.app.FragmentManager;
 
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.util.DialogUtils;
@@ -34,22 +35,21 @@ import de.dennisguse.opentracks.util.DialogUtils;
  */
 public class ConfirmDeleteDialogFragment extends DialogFragment {
 
-    public static final String CONFIRM_DELETE_DIALOG_TAG = "confirmDeleteDialog";
+    private static final String CONFIRM_DELETE_DIALOG_TAG = "confirmDeleteDialog";
-    private static final String KEY_TRACK_IDS = "trackIds";
     private ConfirmDeleteCaller caller;
+    private long[] trackIds;
+
+    public ConfirmDeleteDialogFragment(long[] trackIds) {
+        this.trackIds = trackIds;
+    }
 
     /**
      * Create a new instance.
      *
      * @param trackIds list of track ids to delete. To delete all, set to size 1 with trackIds[0] == -1L
      */
-    public static ConfirmDeleteDialogFragment newInstance(long[] trackIds) {
+    public static void showDialog(FragmentManager fragmentManager, long[] trackIds) {
-        Bundle bundle = new Bundle();
+        new ConfirmDeleteDialogFragment(trackIds).show(fragmentManager, CONFIRM_DELETE_DIALOG_TAG);
-        bundle.putLongArray(KEY_TRACK_IDS, trackIds);
-
-        ConfirmDeleteDialogFragment deleteTrackDialogFragment = new ConfirmDeleteDialogFragment();
-        deleteTrackDialogFragment.setArguments(bundle);
-        return deleteTrackDialogFragment;
     }
 
     @Override
@@ -62,11 +62,9 @@ public class ConfirmDeleteDialogFragment extends DialogFragment {
         }
     }
 
-
     @Override
     @NonNull
     public Dialog onCreateDialog(Bundle savedInstanceState) {
-        final long[] trackIds = getArguments().getLongArray(KEY_TRACK_IDS);
         int titleId;
         int messageId;
         titleId = trackIds.length > 1 ? R.string.generic_delete_selected_confirm_title : R.string.track_delete_one_confirm_title;

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

@@ -24,6 +24,7 @@ import android.os.Bundle;
 import androidx.annotation.NonNull;
 import androidx.fragment.app.DialogFragment;
 import androidx.fragment.app.FragmentActivity;
+import androidx.fragment.app.FragmentManager;
 
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.content.ContentProviderUtils;
@@ -37,17 +38,17 @@ import de.dennisguse.opentracks.util.DialogUtils;
  */
 public class DeleteMarkerDialogFragment extends DialogFragment {
 
-    public static final String DELETE_MARKER_DIALOG_TAG = "deleteMarkerDialog";
+    private static final String DELETE_MARKER_DIALOG_TAG = "deleteMarkerDialog";
-    private static final String KEY_MARKER_IDS = "markerIds";
+    private long[] markerIds;
+
     private DeleteMarkerCaller caller;
 
-    public static DeleteMarkerDialogFragment newInstance(long[] markerIds) {
+    public DeleteMarkerDialogFragment(long[] markerIds) {
-        Bundle bundle = new Bundle();
+        this.markerIds = markerIds;
-        bundle.putLongArray(KEY_MARKER_IDS, markerIds);
+    }
 
-        DeleteMarkerDialogFragment deleteMarkerDialogFragment = new DeleteMarkerDialogFragment();
+    public static void showDialog(FragmentManager fragmentManager, long[] markerIds) {
-        deleteMarkerDialogFragment.setArguments(bundle);
+        new DeleteMarkerDialogFragment(markerIds).show(fragmentManager, DELETE_MARKER_DIALOG_TAG);
-        return deleteMarkerDialogFragment;
     }
 
     @Override
@@ -64,7 +65,6 @@ public class DeleteMarkerDialogFragment extends DialogFragment {
     @NonNull
     public Dialog onCreateDialog(Bundle savedInstanceState) {
         final FragmentActivity fragmentActivity = getActivity();
-        final long[] markerIds = getArguments().getLongArray(KEY_MARKER_IDS);
         int titleId;
         int messageId;
         if (markerIds.length == 1 && markerIds[0] == -1L) {
@@ -81,8 +81,7 @@ public class DeleteMarkerDialogFragment extends DialogFragment {
                         new Thread(new Runnable() {
                             @Override
                             public void run() {
-                                ContentProviderUtils contentProviderUtils = ContentProviderUtils.Factory.get(
+                                ContentProviderUtils contentProviderUtils = ContentProviderUtils.Factory.get(fragmentActivity);
-                                        fragmentActivity);
                                 for (long markerId : markerIds) {
                                     contentProviderUtils.deleteWaypoint(fragmentActivity,
                                             markerId, new DescriptionGeneratorImpl(fragmentActivity));

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

@@ -25,6 +25,7 @@ import android.os.Bundle;
 
 import androidx.annotation.NonNull;
 import androidx.fragment.app.DialogFragment;
+import androidx.fragment.app.FragmentManager;
 
 import java.util.Locale;
 
@@ -39,19 +40,19 @@ import de.dennisguse.opentracks.util.FileUtils;
  */
 public class FileTypeDialogFragment extends DialogFragment {
 
-    public static final String FILE_TYPE_DIALOG_TAG = "fileType";
+    private static final String FILE_TYPE_DIALOG_TAG = "fileType";
-    private static final String KEY_TITLE_ID = "titleId";
+    private int titleId;
-    private static final String KEY_OPTION_ID = "optionId";
+
     private FileTypeCaller caller;
+    private int optionId;
 
-    public static FileTypeDialogFragment newInstance(int titleId, int optionId) {
+    public FileTypeDialogFragment(int titleId, int optionId) {
-        Bundle bundle = new Bundle();
+        this.titleId = titleId;
-        bundle.putInt(KEY_TITLE_ID, titleId);
+        this.optionId = optionId;
-        bundle.putInt(KEY_OPTION_ID, optionId);
+    }
 
-        FileTypeDialogFragment fileTypeDialogFragment = new FileTypeDialogFragment();
+    public static void showDialog(FragmentManager fragmentManager, int titleId, int optionId) {
-        fileTypeDialogFragment.setArguments(bundle);
+        new FileTypeDialogFragment(titleId, optionId).show(fragmentManager, FILE_TYPE_DIALOG_TAG);
-        return fileTypeDialogFragment;
     }
 
     @Override
@@ -67,8 +68,6 @@ public class FileTypeDialogFragment extends DialogFragment {
     @Override
     @NonNull
     public Dialog onCreateDialog(Bundle savedInstanceState) {
-        int optionId = getArguments().getInt(KEY_OPTION_ID);
-        final int titleId = getArguments().getInt(KEY_TITLE_ID);
         final TrackFileFormat[] trackFileFormats = {TrackFileFormat.KMZ_WITH_TRACKDETAIL_AND_SENSORDATA_AND_PICTURES, TrackFileFormat.KML_WITH_TRACKDETAIL_AND_SENSORDATA, TrackFileFormat.GPX};
         String[] choices = new String[trackFileFormats.length];
         for (int i = 0; i < choices.length; i++) {
@@ -96,7 +95,7 @@ public class FileTypeDialogFragment extends DialogFragment {
     }
 
     @Override
-    public void onCancel(DialogInterface dialog) {
+    public void onCancel(@NonNull DialogInterface dialog) {
         onDismissed();
     }
 

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

@@ -24,6 +24,7 @@ import android.os.Bundle;
 import androidx.annotation.NonNull;
 import androidx.fragment.app.DialogFragment;
 import androidx.fragment.app.FragmentActivity;
+import androidx.fragment.app.FragmentManager;
 
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.util.PreferencesUtils;
@@ -36,21 +37,19 @@ import de.dennisguse.opentracks.util.StringUtils;
  */
 public class FrequencyDialogFragment extends DialogFragment {
 
-    public static final String FREQUENCY_DIALOG_TAG = "frequencyDialog";
+    private static final String FREQUENCY_DIALOG_TAG = "frequencyDialog";
+    private int preferenceId;
+    private int defaultValue;
+    private int titleId;
 
-    private static final String KEY_PREFERENCE_ID = "preferenceId";
+    public FrequencyDialogFragment(int preferenceId, int defaultValue, int titleId) {
-    private static final String KEY_DEFAULT_VALUE = "defaultValue";
+        this.preferenceId = preferenceId;
-    private static final String KEY_TITLE_ID = "titleId";
+        this.defaultValue = defaultValue;
+        this.titleId = titleId;
+    }
 
-    public static FrequencyDialogFragment newInstance(int preferenceId, int defaultValue, int titleId) {
+    public static void showDialog(FragmentManager fragmentManager, int preferenceId, int defaultValue, int titleId) {
-        Bundle bundle = new Bundle();
+        new FrequencyDialogFragment(preferenceId, defaultValue, titleId).show(fragmentManager, FREQUENCY_DIALOG_TAG);
-        bundle.putInt(KEY_PREFERENCE_ID, preferenceId);
-        bundle.putInt(KEY_DEFAULT_VALUE, defaultValue);
-        bundle.putInt(KEY_TITLE_ID, titleId);
-
-        FrequencyDialogFragment frequencyDialogFragment = new FrequencyDialogFragment();
-        frequencyDialogFragment.setArguments(bundle);
-        return frequencyDialogFragment;
     }
 
     @Override
@@ -58,9 +57,6 @@ public class FrequencyDialogFragment extends DialogFragment {
     public Dialog onCreateDialog(Bundle savedInstanceState) {
         FragmentActivity fragmentActivity = getActivity();
 
-        final int preferenceId = getArguments().getInt(KEY_PREFERENCE_ID);
-        int defaultValue = getArguments().getInt(KEY_DEFAULT_VALUE);
-        int titleId = getArguments().getInt(KEY_TITLE_ID);
         int frequencyValue = PreferencesUtils.getInt(fragmentActivity, preferenceId, defaultValue);
 
         return new AlertDialog.Builder(fragmentActivity).setPositiveButton(

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

@@ -192,8 +192,7 @@ public class MarkerDetailFragment extends Fragment {
                 startActivity(intent);
                 return true;
             case R.id.marker_detail_delete:
-                DeleteMarkerDialogFragment.newInstance(new long[]{markerId})
+                DeleteMarkerDialogFragment.showDialog(getChildFragmentManager(), new long[]{markerId});
-                        .show(getChildFragmentManager(), DeleteMarkerDialogFragment.DELETE_MARKER_DIALOG_TAG);
                 return true;
             default:
                 return super.onOptionsItemSelected(item);

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

@@ -43,7 +43,6 @@ import de.dennisguse.opentracks.content.Waypoint;
 import de.dennisguse.opentracks.content.sensor.SensorDataSet;
 import de.dennisguse.opentracks.services.ITrackRecordingService;
 import de.dennisguse.opentracks.services.TrackRecordingServiceConnection;
-import de.dennisguse.opentracks.services.sensors.RemoteSensorManager;
 import de.dennisguse.opentracks.stats.TripStatistics;
 import de.dennisguse.opentracks.util.LocationUtils;
 import de.dennisguse.opentracks.util.PreferencesUtils;
@@ -59,7 +58,7 @@ import de.dennisguse.opentracks.util.UnitConversions;
  */
 public class StatsFragment extends Fragment implements TrackDataListener {
 
-    public static final String STATS_FRAGMENT_TAG = "statsFragment";
+    public static final String STATS_FRAGMENT_TAG = StatsFragment.class.getSimpleName();
 
     private TrackDataHub trackDataHub;
     private Handler handlerUpdateUI;
@@ -94,8 +93,6 @@ public class StatsFragment extends Fragment implements TrackDataListener {
     public void onActivityCreated(Bundle savedInstanceState) {
         super.onActivityCreated(savedInstanceState);
         handlerUpdateUI = new Handler();
-        trackRecordingServiceConnection = new TrackRecordingServiceConnection(getContext(), null);
-        trackRecordingServiceConnection.startConnection(getContext());
 
         Spinner activityTypeIcon = getView().findViewById(R.id.stats_activity_type_icon);
         activityTypeIcon.setAdapter(TrackIconUtils.getIconSpinnerAdapter(getActivity(), ""));
@@ -123,6 +120,10 @@ public class StatsFragment extends Fragment implements TrackDataListener {
     public void onResume() {
         super.onResume();
         resumeTrackDataHub();
+
+        trackRecordingServiceConnection = new TrackRecordingServiceConnection(getContext(), null);
+        trackRecordingServiceConnection.startConnection(getContext());
+
         updateUi(getActivity());
         if (isSelectedTrackRecording()) {
             handlerUpdateUI.post(updateUIeachSecond);
@@ -140,6 +141,7 @@ public class StatsFragment extends Fragment implements TrackDataListener {
     public void onStop() {
         super.onStop();
         trackRecordingServiceConnection.unbind();
+        trackRecordingServiceConnection = null;
     }
 
     @Override
@@ -298,7 +300,7 @@ public class StatsFragment extends Fragment implements TrackDataListener {
     }
 
     /**
-     * Tries to fetch most recent {@link SensorDataSet} {@link RemoteSensorManager}.
+     * Tries to fetch most recent {@link SensorDataSet} {@link de.dennisguse.opentracks.services.sensors.BluetoothRemoteSensorManager}.
      */
     private void updateSensorDataUI() {
         ITrackRecordingService trackRecordingService = trackRecordingServiceConnection.getServiceIfBound();

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

@@ -84,9 +84,7 @@ public class ExportActivity extends FragmentActivity implements FileTypeDialogFr
     }
 
     private void fileTypeDialogStart() {
-        FileTypeDialogFragment
+        FileTypeDialogFragment.showDialog(getSupportFragmentManager(), R.string.export_all_title, R.string.export_all_option);
-                .newInstance(R.string.export_all_title, R.string.export_all_option)
-                .show(getSupportFragmentManager(), FileTypeDialogFragment.FILE_TYPE_DIALOG_TAG);
     }
 
     @Override

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

@@ -99,7 +99,7 @@ public class ExportAsyncTask extends AsyncTask<Void, Integer, Boolean> {
     protected Boolean doInBackground(Void... params) {
         try {
             Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
-            boolean isRecording = PreferencesUtils.getLong(exportActivity, R.string.recording_track_id_key) != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT;
+            boolean isRecording = PreferencesUtils.isRecording(exportActivity);
             boolean isPaused = PreferencesUtils.getBoolean(exportActivity, R.string.recording_track_paused_key, PreferencesUtils.RECORDING_TRACK_PAUSED_DEFAULT);
             // Get the wake lock if not recording or paused
             if (!isRecording || isPaused) {

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

@@ -49,9 +49,10 @@ public class KmlTrackWriter implements TrackWriter {
     private static final String END_STYLE = "end";
     private static final String TRACK_STYLE = "track";
     private static final String SCHEMA_ID = "schema";
-    private static final String CADENCE = "cadence";
+
-    private static final String HEART_RATE = "heart_rate";
+    private static final String SENSOR_TYPE_CADENCE = "cadence";
-    private static final String POWER = "power";
+    private static final String SENSOR_TYPE_HEART_RATE = "heart_rate";
+    private static final String SENSOR_TYPE_POWER = "power";
 
     private static final String WAYPOINT_ICON = "http://maps.google.com/mapfiles/kml/pushpin/blue-pushpin.png";
     private static final String STATISTICS_ICON = "http://maps.google.com/mapfiles/kml/pushpin/ylw-pushpin.png";
@@ -71,9 +72,6 @@ public class KmlTrackWriter implements TrackWriter {
     private List<Float> powerList = new ArrayList<>();
     private List<Float> cadenceList = new ArrayList<>();
     private List<Float> heartRateList = new ArrayList<>();
-    private boolean hasPower;
-    private boolean hasCadence;
-    private boolean hasHeartRate;
 
     private Location startLocation;
 
@@ -132,9 +130,9 @@ public class KmlTrackWriter implements TrackWriter {
             printWriter.println("<Schema id=\"" + SCHEMA_ID + "\">");
 
             if (exportSensorData) {
-                writeSensorStyle(POWER, context.getString(R.string.description_sensor_power));
+                writeSensorStyle(SENSOR_TYPE_POWER, context.getString(R.string.description_sensor_power));
-                writeSensorStyle(CADENCE, context.getString(R.string.description_sensor_cadence));
+                writeSensorStyle(SENSOR_TYPE_CADENCE, context.getString(R.string.description_sensor_cadence));
-                writeSensorStyle(HEART_RATE, context.getString(R.string.description_sensor_heart_rate));
+                writeSensorStyle(SENSOR_TYPE_HEART_RATE, context.getString(R.string.description_sensor_heart_rate));
             }
             printWriter.println("</Schema>");
         }
@@ -235,9 +233,6 @@ public class KmlTrackWriter implements TrackWriter {
     public void writeOpenSegment() {
         if (printWriter != null) {
             printWriter.println("<gx:Track>");
-            hasPower = false;
-            hasCadence = false;
-            hasHeartRate = false;
             powerList.clear();
             cadenceList.clear();
             heartRateList.clear();
@@ -250,14 +245,14 @@ public class KmlTrackWriter implements TrackWriter {
             printWriter.println("<ExtendedData>");
             printWriter.println("<SchemaData schemaUrl=\"#" + SCHEMA_ID + "\">");
             if (exportSensorData) {
-                if (hasPower) {
+                if (powerList.size() > 0) {
-                    writeSensorData(powerList, POWER);
+                    writeSensorData(powerList, SENSOR_TYPE_POWER);
                 }
-                if (hasCadence) {
+                if (cadenceList.size() > 0) {
-                    writeSensorData(cadenceList, CADENCE);
+                    writeSensorData(cadenceList, SENSOR_TYPE_CADENCE);
                 }
-                if (hasHeartRate) {
+                if (heartRateList.size() > 0) {
-                    writeSensorData(heartRateList, HEART_RATE);
+                    writeSensorData(heartRateList, SENSOR_TYPE_HEART_RATE);
                 }
             }
             printWriter.println("</SchemaData>");
@@ -466,11 +461,11 @@ public class KmlTrackWriter implements TrackWriter {
      * Writes a sensor style.
      *
      * @param name        the name of the sesnor
-     * @param displayName the sensor display name
+     * @param sensorType the sensor display name
      */
-    private void writeSensorStyle(String name, String displayName) {
+    private void writeSensorStyle(String name, String sensorType) {
-        printWriter.println("<gx:SimpleArrayField name=\"" + name + "\" type=\"int\">");
+        printWriter.println("<gx:SimpleArrayField name=\"" + name + "\" type=\"float\">");
-        printWriter.println("<displayName>" + StringUtils.formatCData(displayName) + "</displayName>");
+        printWriter.println("<displayName>" + StringUtils.formatCData(sensorType) + "</displayName>");
         printWriter.println("</gx:SimpleArrayField>");
     }
 }

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

@@ -384,8 +384,7 @@ abstract class AbstractFileTrackImporter extends DefaultHandler implements Track
      * @param message the message
      */
     protected String createErrorMessage(String message) {
-        return String.format(Locale.US, "Parsing error at line: %d column: %d. %s",
+        return String.format(Locale.US, "Parsing error at line: %d column: %d. %s", locator.getLineNumber(), locator.getColumnNumber(), message);
-                locator.getLineNumber(), locator.getColumnNumber(), message);
     }
 
     /**

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

@@ -85,9 +85,7 @@ public class ImportActivity extends FragmentActivity implements FileTypeDialogFr
     }
 
     private void fileTypeDialogStart() {
-        FileTypeDialogFragment
+        FileTypeDialogFragment.showDialog(getSupportFragmentManager(), R.string.import_selection_title, R.string.import_selection_option);
-                .newInstance(R.string.import_selection_title, R.string.import_selection_option)
-                .show(getSupportFragmentManager(), FileTypeDialogFragment.FILE_TYPE_DIALOG_TAG);
     }
 
     @Override

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

@@ -103,7 +103,7 @@ public class ImportAsyncTask extends AsyncTask<Void, Integer, Boolean> {
         try {
             Thread.currentThread().setPriority(Thread.MAX_PRIORITY);
             // Get the wake lock if not recording or paused
-            boolean isRecording = PreferencesUtils.getLong(importActivity, R.string.recording_track_id_key) != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT;
+            boolean isRecording = PreferencesUtils.isRecording(importActivity);
             boolean isPaused = PreferencesUtils.getBoolean(importActivity, R.string.recording_track_paused_key, PreferencesUtils.RECORDING_TRACK_PAUSED_DEFAULT);
             if (!isRecording || isPaused) {
                 wakeLock = SystemUtils.acquireWakeLock(importActivity, wakeLock);

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

@@ -19,6 +19,7 @@ package de.dennisguse.opentracks.io.file.importer;
 import android.content.Context;
 import android.location.Location;
 import android.net.Uri;
+import android.util.Log;
 
 import androidx.annotation.VisibleForTesting;
 
@@ -39,6 +40,8 @@ import de.dennisguse.opentracks.content.sensor.SensorDataSet;
  */
 public class KmlFileTrackImporter extends AbstractFileTrackImporter {
 
+    private static final String TAG = KmlFileTrackImporter.class.getSimpleName();
+
     private static final String CADENCE = "cadence";
     private static final String HEART_RATE = "heart_rate";
     private static final String POWER = "power";
@@ -65,11 +68,11 @@ public class KmlFileTrackImporter extends AbstractFileTrackImporter {
     private static final String ATTRIBUTE_NAME = "name";
 
     private boolean trackStarted = false;
-    private String sensorName;
+    private String sensorType;
     private ArrayList<Location> locationList;
-    private ArrayList<Integer> cadenceList;
+    private ArrayList<Float> cadenceList;
-    private ArrayList<Integer> heartRateList;
+    private ArrayList<Float> heartRateList;
-    private ArrayList<Integer> powerList;
+    private ArrayList<Float> powerList;
 
     /**
      * Constructor.
@@ -179,6 +182,10 @@ public class KmlFileTrackImporter extends AbstractFileTrackImporter {
      * On waypoint end.
      */
     private void onWaypointEnd() throws SAXException {
+        if (waypointType == null) {
+            return;
+        }
+
         // Add a waypoint if the waypointType matches
         WaypointType type;
         switch (waypointType) {
@@ -229,20 +236,30 @@ public class KmlFileTrackImporter extends AbstractFileTrackImporter {
      */
     private void onTrackSegmentEnd() {
         // Close a track segment by inserting the segment locations
-        boolean hasHeartRate = heartRateList.size() == locationList.size();
-        boolean hasCadence = cadenceList.size() == locationList.size();
-        boolean hasPower = powerList.size() == locationList.size();
-
         for (int i = 0; i < locationList.size(); i++) {
             Location location = locationList.get(i);
 
-            if (!hasPower && !hasCadence && !hasHeartRate) {
+            boolean hasSensorData = false;
+            float heartrate = SensorDataSet.DATA_UNAVAILABLE;
+            float cadence = SensorDataSet.DATA_UNAVAILABLE;
+            float power = SensorDataSet.DATA_UNAVAILABLE;
+
+            if (i < heartRateList.size()) {
+                heartrate = heartRateList.get(i);
+                hasSensorData = true;
+            }
+            if (i < cadenceList.size()) {
+                cadence = cadenceList.get(i);
+                hasSensorData = true;
+            }
+            if (i < powerList.size()) {
+                power = powerList.get(i);
+                hasSensorData = true;
+            }
+
+            if (!hasSensorData) {
                 insertTrackPoint(location);
             } else {
-                float heartrate = hasHeartRate ? heartRateList.get(i) : SensorDataSet.DATA_UNAVAILABLE;
-                float cadence = hasHeartRate ? cadenceList.get(i) : SensorDataSet.DATA_UNAVAILABLE;
-                float power = hasHeartRate ? powerList.get(i) : SensorDataSet.DATA_UNAVAILABLE;
-
                 SensorDataSetLocation sensorDataSetLocation = new SensorDataSetLocation(location, new SensorDataSet(heartrate, cadence, power, SensorDataSet.DATA_UNAVAILABLE, location.getTime()));
                 insertTrackPoint(sensorDataSetLocation);
             }
@@ -277,7 +294,7 @@ public class KmlFileTrackImporter extends AbstractFileTrackImporter {
      * On sensor data start. gx:SimpleArrayData start tag.
      */
     private void onSensorDataStart(Attributes attributes) {
-        sensorName = attributes.getValue(ATTRIBUTE_NAME);
+        sensorType = attributes.getValue(ATTRIBUTE_NAME);
     }
 
     /**
@@ -291,18 +308,24 @@ public class KmlFileTrackImporter extends AbstractFileTrackImporter {
         if (content.equals("")) {
             return;
         }
-        int value;
+        float value;
         try {
-            value = Integer.parseInt(content);
+            value = Float.valueOf(content);
         } catch (NumberFormatException e) {
             throw new SAXException(createErrorMessage("Unable to parse gx:value:" + content), e);
         }
-        if (POWER.equals(sensorName)) {
+        switch (sensorType) {
+            case POWER:
                 powerList.add(value);
-        } else if (HEART_RATE.equals(sensorName)) {
+                break;
+            case HEART_RATE:
                 heartRateList.add(value);
-        } else if (CADENCE.equals(sensorName)) {
+                break;
+            case CADENCE:
                 cadenceList.add(value);
+                break;
+            default:
+                Log.w(TAG, "Data from sensor " + sensorType + " is not (yet) supported.");
         }
     }
 }

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

@@ -57,7 +57,7 @@ import de.dennisguse.opentracks.content.Waypoint;
 import de.dennisguse.opentracks.content.Waypoint.WaypointType;
 import de.dennisguse.opentracks.content.WaypointCreationRequest;
 import de.dennisguse.opentracks.content.sensor.SensorDataSet;
-import de.dennisguse.opentracks.services.sensors.RemoteSensorManager;
+import de.dennisguse.opentracks.services.sensors.BluetoothRemoteSensorManager;
 import de.dennisguse.opentracks.services.sensors.RemoteSensorManagerFactory;
 import de.dennisguse.opentracks.services.tasks.AnnouncementPeriodicTaskFactory;
 import de.dennisguse.opentracks.services.tasks.PeriodicTaskExecutor;
@@ -119,10 +119,9 @@ public class TrackRecordingService extends Service {
         @Override
         public void onSharedPreferenceChanged(SharedPreferences preferences, String key) {
             if (key == null || key.equals(PreferencesUtils.getKey(context, R.string.recording_track_id_key))) {
-                long trackId = PreferencesUtils.getLong(context, R.string.recording_track_id_key);
                 // Only through the TrackRecordingService can one stop a recording and set the recordingTrackId to -1L.
-                if (trackId != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT) {
+                if (PreferencesUtils.isRecording(context)) {
-                    recordingTrackId = trackId;
+                    recordingTrackId = PreferencesUtils.getLong(context, R.string.recording_track_id_key);
                 }
             }
             if (key == null || key.equals(PreferencesUtils.getKey(context, R.string.recording_track_paused_key))) {
@@ -170,7 +169,7 @@ public class TrackRecordingService extends Service {
     };
     private TripStatisticsUpdater markerTripStatisticsUpdater;
     private WakeLock wakeLock;
-    private RemoteSensorManager remoteSensorManager;
+    private BluetoothRemoteSensorManager remoteSensorManager;
     private Location lastLocation;
     private boolean currentSegmentHasLocation;
     private boolean isIdle; // true if idle
@@ -310,7 +309,7 @@ public class TrackRecordingService extends Service {
      * Returns true if the service is recording.
      */
     public boolean isRecording() {
-        return recordingTrackId != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT;
+        return PreferencesUtils.isRecording(recordingTrackId);
     }
 
     /**
@@ -447,7 +446,8 @@ public class TrackRecordingService extends Service {
      */
     private void handleStartCommand(Intent intent, int startId) {
         // Check if the service is called to resume track (from phone reboot)
-        if (intent != null && intent.getBooleanExtra(RESUME_TRACK_EXTRA_NAME, false) && !shouldResumeTrack()) {
+        boolean resumeTrackRequested = intent.getBooleanExtra(RESUME_TRACK_EXTRA_NAME, false);
+        if (resumeTrackRequested && !shouldResumeTrack()) {
             Log.i(TAG, "Stop resume track.");
             updateRecordingState(PreferencesUtils.RECORDING_TRACK_ID_DEFAULT, true);
             stopSelfResult(startId);
@@ -854,7 +854,7 @@ public class TrackRecordingService extends Service {
      */
     private void insertLocation(Track track, Location location, Location lastValidTrackPoint) {
         if (location == null) {
-            Log.w(TAG, "Ignore insertLocation. loation is null.");
+            Log.w(TAG, "Ignore insertLocation. location is null.");
             return;
         }
         // Do not insert if inserted already

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

@@ -16,7 +16,6 @@
 
 package de.dennisguse.opentracks.services;
 
-import android.app.ActivityManager;
 import android.content.ComponentName;
 import android.content.Context;
 import android.content.Intent;
@@ -29,14 +28,13 @@ import android.widget.Toast;
 
 import androidx.annotation.NonNull;
 
-import java.util.List;
-
 import de.dennisguse.opentracks.BuildConfig;
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.TrackEditActivity;
 import de.dennisguse.opentracks.content.WaypointCreationRequest;
 import de.dennisguse.opentracks.util.IntentUtils;
 import de.dennisguse.opentracks.util.PreferencesUtils;
+import de.dennisguse.opentracks.util.ServiceUtils;
 
 /**
  * Wrapper for the track recording service.
@@ -154,7 +152,7 @@ public class TrackRecordingServiceConnection implements ServiceConnection, Death
             return;
         }
 
-        if (!startIfNeeded && !isRecordingServiceRunning(context)) {
+        if (!startIfNeeded && !ServiceUtils.isTrackRecordingServiceRunning(context)) {
             Log.d(TAG, "Service is not started. Not binding it.");
             return;
         }
@@ -169,31 +167,6 @@ public class TrackRecordingServiceConnection implements ServiceConnection, Death
         context.bindService(new Intent(context, TrackRecordingService.class), this, flags);
     }
 
-    /**
-     * Returns true if the recording service is running.
-     *
-     * @param context the current context
-     */
-    @Deprecated
-    public static boolean isRecordingServiceRunning(Context context) {
-        ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
-        if (activityManager == null) {
-            return false;
-        }
-
-        //TODO This approach is deprecated as of API level 26 and should be replaced.
-        List<ActivityManager.RunningServiceInfo> services = activityManager.getRunningServices(Integer.MAX_VALUE);
-
-        for (ActivityManager.RunningServiceInfo serviceInfo : services) {
-            ComponentName componentName = serviceInfo.service;
-            String serviceName = componentName.getClassName();
-            if (TrackRecordingService.class.getName().equals(serviceName)) {
-                return true;
-            }
-        }
-        return false;
-    }
-
     /**
      * Resumes the track recording service connection.
      *
@@ -201,7 +174,7 @@ public class TrackRecordingServiceConnection implements ServiceConnection, Death
      */
     public void startConnection(@NonNull Context context) {
         bindIfStarted();
-        if (!isRecordingServiceRunning(context)) {
+        if (!ServiceUtils.isTrackRecordingServiceRunning(context)) {
             resetRecordingState(context);
         }
     }
@@ -226,37 +199,14 @@ public class TrackRecordingServiceConnection implements ServiceConnection, Death
         }
     }
 
-    /**
+    private static void resetRecordingState(Context context) {
-     * Stops the recording.
+        if (PreferencesUtils.isRecording(context)) {
-     *
+            PreferencesUtils.setLong(context, R.string.recording_track_id_key, PreferencesUtils.RECORDING_TRACK_ID_DEFAULT);
-     * @param context    the context
-     * @param showEditor true to show the editor
-     */
-    public void stopRecording(@NonNull Context context, boolean showEditor) {
-        ITrackRecordingService trackRecordingService = getServiceIfBound();
-        if (trackRecordingService == null) {
-            resetRecordingState(context);
-        } else {
-            try {
-                if (showEditor) {
-                    // Need to remember the recordingTrackId before calling endCurrentTrack() as endCurrentTrack() sets the value to -1L.
-                    long recordingTrackId = PreferencesUtils.getLong(context, R.string.recording_track_id_key);
-                    trackRecordingService.endCurrentTrack();
-                    if (recordingTrackId != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT) {
-                        Intent intent = IntentUtils.newIntent(context, TrackEditActivity.class)
-                                .putExtra(TrackEditActivity.EXTRA_TRACK_ID, recordingTrackId)
-                                .putExtra(TrackEditActivity.EXTRA_NEW_TRACK, true);
-                        context.startActivity(intent);
         }
-                } else {
+        boolean recordingTrackPaused = PreferencesUtils.getBoolean(context, R.string.recording_track_paused_key, PreferencesUtils.RECORDING_TRACK_PAUSED_DEFAULT);
-                    trackRecordingService.endCurrentTrack();
+        if (!recordingTrackPaused) {
+            PreferencesUtils.setBoolean(context, R.string.recording_track_paused_key, PreferencesUtils.RECORDING_TRACK_PAUSED_DEFAULT);
         }
-            } catch (Exception e) {
-                //TODO What exception are we catching here? Should be removed...
-                Log.e(TAG, "Unable to stop recording.", e);
-            }
-        }
-        unbindAndStop();
     }
 
     /**
@@ -284,14 +234,36 @@ public class TrackRecordingServiceConnection implements ServiceConnection, Death
         return -1L;
     }
 
-    private static void resetRecordingState(Context context) {
+    /**
+     * Stops the recording.
+     *
+     * @param context    the context
+     * @param showEditor true to show the editor
+     */
+    public void stopRecording(@NonNull Context context, boolean showEditor) {
+        ITrackRecordingService trackRecordingService = getServiceIfBound();
+        if (trackRecordingService == null) {
+            resetRecordingState(context);
+        } else {
+            try {
+                if (showEditor) {
+                    // Need to remember the recordingTrackId before calling endCurrentTrack() as endCurrentTrack() sets the value to -1L.
                     long recordingTrackId = PreferencesUtils.getLong(context, R.string.recording_track_id_key);
-        if (recordingTrackId != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT) {
+                    trackRecordingService.endCurrentTrack();
-            PreferencesUtils.setLong(context, R.string.recording_track_id_key, PreferencesUtils.RECORDING_TRACK_ID_DEFAULT);
+                    if (PreferencesUtils.isRecording(context)) {
+                        Intent intent = IntentUtils.newIntent(context, TrackEditActivity.class)
+                                .putExtra(TrackEditActivity.EXTRA_TRACK_ID, recordingTrackId)
+                                .putExtra(TrackEditActivity.EXTRA_NEW_TRACK, true);
+                        context.startActivity(intent);
                     }
-        boolean recordingTrackPaused = PreferencesUtils.getBoolean(context, R.string.recording_track_paused_key, PreferencesUtils.RECORDING_TRACK_PAUSED_DEFAULT);
+                } else {
-        if (!recordingTrackPaused) {
+                    trackRecordingService.endCurrentTrack();
-            PreferencesUtils.setBoolean(context, R.string.recording_track_paused_key, PreferencesUtils.RECORDING_TRACK_PAUSED_DEFAULT);
+                }
+            } catch (Exception e) {
+                //TODO What exception are we catching here? Should be removed...
+                Log.e(TAG, "Unable to stop recording.", e);
             }
         }
+        unbindAndStop();
+    }
 }

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

@@ -23,9 +23,7 @@ import android.bluetooth.BluetoothGattCharacteristic;
 import android.bluetooth.BluetoothGattDescriptor;
 import android.bluetooth.BluetoothProfile;
 import android.content.Context;
-import android.os.Bundle;
 import android.os.Handler;
-import android.os.Message;
 import android.util.Log;
 
 import androidx.annotation.NonNull;
@@ -34,6 +32,7 @@ import java.util.UUID;
 
 import de.dennisguse.opentracks.content.sensor.SensorDataSet;
 import de.dennisguse.opentracks.content.sensor.SensorState;
+import de.dennisguse.opentracks.util.BluetoothUtils;
 
 /**
  * Manages connection to Bluetooth LE heart rate monitor.
@@ -42,10 +41,10 @@ import de.dennisguse.opentracks.content.sensor.SensorState;
 public class BluetoothConnectionManager {
 
     // Message types sent to handler
-    static final int MESSAGE_DEVICE_NAME = 1;
+    static final int MESSAGE_CONNECTING = 1;
-    static final int MESSAGE_READ = 2;
+    static final int MESSAGE_CONNECTED = 2;
-
+    static final int MESSAGE_READ = 3;
-    static final String KEY_DEVICE_NAME = "device_name";
+    static final int MESSAGE_DISCONNECTED = 4;
 
     private static final UUID HEART_RATE_SERVICE_UUID = new UUID(0x180D00001000L, 0x800000805f9b34fbL);
     private static final UUID HEART_RATE_MEASUREMENT_CHAR_UUID = new UUID(0x2A3700001000L, 0x800000805f9b34fbL);
@@ -58,22 +57,36 @@ public class BluetoothConnectionManager {
 
     private SensorState sensorState;
 
+    private BluetoothGatt bluetoothGatt;
+    private BluetoothDevice bluetoothDevice;
+
     private BluetoothGattCallback connectCallback = new BluetoothGattCallback() {
         @Override
         public void onConnectionStateChange(BluetoothGatt gatt, int status, int newState) {
-            if (newState == BluetoothProfile.STATE_CONNECTED) {
+            switch (newState) {
-                gatt.discoverServices();
+                case BluetoothProfile.STATE_CONNECTING:
+                    Log.d(TAG, "Connecting to sensor: " + gatt.getDevice());
+                    setState(SensorState.CONNECTING);
+
+                    handler.obtainMessage(MESSAGE_CONNECTING, gatt.getDevice().getName()).sendToTarget();
+                case BluetoothProfile.STATE_CONNECTED:
+                    Log.d(TAG, "Connected to sensor: " + gatt.getDevice());
                     setState(SensorState.CONNECTED);
 
-                //Inform about status change
+                    gatt.discoverServices();
-                Message message = handler.obtainMessage(MESSAGE_DEVICE_NAME);
+
-                Bundle bundle = new Bundle();
+                    handler.obtainMessage(MESSAGE_CONNECTED, gatt.getDevice().getName()).sendToTarget();
-                bundle.putString(KEY_DEVICE_NAME, gatt.getDevice().getName());
+                    break;
-                message.setData(bundle);
+                case BluetoothProfile.STATE_DISCONNECTING:
-                handler.sendMessage(message);
+                    Log.d(TAG, "Disconnecting from sensor: " + gatt.getDevice());
-                return;
+                    setState(SensorState.DISCONNECTING);
+
+                case BluetoothProfile.STATE_DISCONNECTED:
+                    Log.d(TAG, "Disconnected from sensor: " + gatt.getDevice());
+                    setState(SensorState.DISCONNECTED);
+
+                    handler.obtainMessage(MESSAGE_DISCONNECTED, gatt.getDevice().getName()).sendToTarget();
             }
-            Log.d(TAG, "Could not connect to bluetooth sensor: " + gatt.getDevice());
         }
 
         @Override
@@ -91,10 +104,11 @@ public class BluetoothConnectionManager {
 
         @Override
         public void onCharacteristicChanged(BluetoothGatt gatt, @NonNull BluetoothGattCharacteristic characteristic) {
-            int heartRate = BluetoothLEUtils.parseHeartRate(characteristic);
+            int heartRate = BluetoothUtils.parseHeartRate(characteristic);
+            String deviceName = gatt.getDevice().getName();
 
-            Log.d(TAG, "Received heart beat rate: " + heartRate);
+            Log.d(TAG, "Received heart beat rate " + deviceName + ": " + heartRate);
-            SensorDataSet sensorDataSet = new SensorDataSet(heartRate, gatt.getDevice().getName(), gatt.getDevice().getAddress());
+            SensorDataSet sensorDataSet = new SensorDataSet(heartRate, deviceName, gatt.getDevice().getAddress());
             handler.obtainMessage(MESSAGE_READ, sensorDataSet).sendToTarget();
         }
     };
@@ -104,45 +118,42 @@ public class BluetoothConnectionManager {
      *
      * @param handler a handler for sending messages back to the UI activity
      */
-    BluetoothConnectionManager(Context context, Handler handler) {
+    BluetoothConnectionManager(@NonNull Context context, @NonNull BluetoothDevice bluetoothDevice, @NonNull Handler handler) {
         this.context = context;
+        this.bluetoothDevice = bluetoothDevice;
         this.handler = handler;
         this.sensorState = SensorState.NONE;
     }
 
-    /**
+    public synchronized void connect() {
-     * Gets the sensor state.
+        if (bluetoothGatt != null) {
-     */
+            Log.w(TAG, "Already connected; ignoring.");
+        }
+
+        Log.d(TAG, "Connecting to: " + bluetoothDevice);
+
+        setState(SensorState.CONNECTING);
+        bluetoothGatt = bluetoothDevice.connectGatt(this.context, true, this.connectCallback);
+    }
+
+    public synchronized void disconnect() {
+        if (bluetoothGatt == null) {
+            Log.w(TAG, "Cannot disconnect if not connected.");
+            return;
+        }
+        bluetoothGatt.close();
+        bluetoothGatt = null;
+    }
+
+    public synchronized boolean isSameBluetoothDevice(String address) {
+        return this.bluetoothDevice.getAddress().equals(address);
+    }
+
     synchronized SensorState getSensorState() {
         return sensorState;
     }
 
-    /**
-     * Sets the sensor state.
-     *
-     * @param sensorState the sensor state
-     */
     private synchronized void setState(SensorState sensorState) {
         this.sensorState = sensorState;
     }
-
-    /**
-     * Resets the bluetooth connection manager.
-     */
-    public synchronized void reset() {
-        //TODO Disconnect
-        setState(SensorState.NONE);
-    }
-
-    /**
-     * Connects to a bluetooth device.
-     *
-     * @param bluetoothDevice the bluetooth device
-     */
-    public synchronized void connect(BluetoothDevice bluetoothDevice) {
-        Log.d(TAG, "connect to: " + bluetoothDevice);
-
-        bluetoothDevice.connectGatt(this.context, false, this.connectCallback);
-        setState(SensorState.CONNECTING);
-    }
 }

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

@@ -1,17 +0,0 @@
-package de.dennisguse.opentracks.services.sensors;
-
-import android.bluetooth.BluetoothGattCharacteristic;
-
-final class BluetoothLEUtils {
-
-    private BluetoothLEUtils() {
-    }
-
-    static int parseHeartRate(BluetoothGattCharacteristic characteristic) {
-        //DOCUMENTATION https://www.bluetooth.com/specifications/gatt/characteristics/
-        byte[] raw = characteristic.getValue();
-        int index = ((raw[0] & 0x1) == 1) ? 2 : 1;
-        int format = (index == 1) ? BluetoothGattCharacteristic.FORMAT_UINT8 : BluetoothGattCharacteristic.FORMAT_UINT16;
-        return characteristic.getIntValue(format, index);
-    }
-}

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

@@ -19,26 +19,28 @@ package de.dennisguse.opentracks.services.sensors;
 import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothDevice;
 import android.content.Context;
+import android.content.SharedPreferences;
 import android.os.Handler;
 import android.os.Looper;
 import android.os.Message;
 import android.util.Log;
+import android.widget.Toast;
 
 import java.util.ArrayList;
 
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.content.sensor.SensorDataSet;
-import de.dennisguse.opentracks.content.sensor.SensorState;
 import de.dennisguse.opentracks.util.PreferencesUtils;
 import de.dennisguse.opentracks.util.UnitConversions;
 
 /**
  * Bluetooth sensor manager.
- * TODO: Handle a BluetoothGatt.STATE_DISCONNECTED
  *
  * @author Sandor Dornbush
  */
-public class BluetoothRemoteSensorManager extends RemoteSensorManager {
+public class BluetoothRemoteSensorManager {
+
+    public static final long MAX_SENSOR_DATE_SET_AGE_MS = 5000;
 
     private static final String TAG = BluetoothConnectionManager.class.getSimpleName();
 
@@ -46,17 +48,21 @@ public class BluetoothRemoteSensorManager extends RemoteSensorManager {
 
     private final Context context;
 
-    private final BluetoothConnectionManager bluetoothConnectionManager;
+    private final SharedPreferences sharedPreferences;
-
-    private SensorDataSet sensorDataSet = null;
-
     // Handler that gets information back from the bluetoothConnectionManager
     private final Handler messageHandler = new Handler(Looper.getMainLooper()) {
         @Override
         public void handleMessage(Message message) {
+            String toastMessage;
             switch (message.what) {
-                case BluetoothConnectionManager.MESSAGE_DEVICE_NAME:
+                case BluetoothConnectionManager.MESSAGE_CONNECTING:
-                    String deviceName = message.getData().getString(BluetoothConnectionManager.KEY_DEVICE_NAME);
+                    //Ignore for now.
+                    toastMessage = context.getString(R.string.settings_sensor_connecting, message.obj);
+                    Toast.makeText(context, toastMessage, Toast.LENGTH_LONG).show();
+                    break;
+                case BluetoothConnectionManager.MESSAGE_CONNECTED:
+                    toastMessage = context.getString(R.string.settings_sensor_connected, message.obj);
+                    Toast.makeText(context, toastMessage, Toast.LENGTH_LONG).show();
                     break;
                 case BluetoothConnectionManager.MESSAGE_READ:
                     if (!(message.obj instanceof SensorDataSet)) {
@@ -66,18 +72,44 @@ public class BluetoothRemoteSensorManager extends RemoteSensorManager {
                         sensorDataSet = (SensorDataSet) message.obj;
                     }
                     break;
+                case BluetoothConnectionManager.MESSAGE_DISCONNECTED:
+                    toastMessage = context.getString(R.string.settings_sensor_disconnected, message.obj);
+                    Toast.makeText(context, toastMessage, Toast.LENGTH_LONG).show();
+                    break;
                 default:
+                    Log.e(TAG, "Got an undefined case. Please check.");
                     break;
             }
         }
     };
+    private final SharedPreferences.OnSharedPreferenceChangeListener sharedPreferenceChangeListener = new SharedPreferences.OnSharedPreferenceChangeListener() {
+        @Override
+        public void onSharedPreferenceChanged(SharedPreferences preferences, String key) {
+            if (bluetoothConnectionManager != null && key == null || key.equals(PreferencesUtils.getKey(context, R.string.bluetooth_sensor_key))) {
+                String address = PreferencesUtils.getString(context, R.string.bluetooth_sensor_key, PreferencesUtils.BLUETOOTH_SENSOR_DEFAULT);
+                if (address.equals(PreferencesUtils.BLUETOOTH_SENSOR_DEFAULT)) {
+                    stop();
+                    return;
+                }
+                if (bluetoothConnectionManager.isSameBluetoothDevice(address)) {
+                    return;
+                }
+
+                disconnect();
+                startCurrentSensor();
+            }
+        }
+    };
+
+    private SensorDataSet sensorDataSet = null;
+    private BluetoothConnectionManager bluetoothConnectionManager;
 
     /**
      * @param context the context
      */
     BluetoothRemoteSensorManager(Context context) {
         this.context = context;
-        bluetoothConnectionManager = new BluetoothConnectionManager(context, messageHandler);
+        sharedPreferences = PreferencesUtils.getSharedPreferences(context);
     }
 
     private static BluetoothAdapter getDefaultBluetoothAdapter() {
@@ -117,13 +149,34 @@ public class BluetoothRemoteSensorManager extends RemoteSensorManager {
         return adapters.get(0);
     }
 
-    @Override
+    public void start() {
+        sharedPreferences.registerOnSharedPreferenceChangeListener(sharedPreferenceChangeListener);
+        startCurrentSensor();
+    }
+
+    public void stop() {
+        disconnect();
+        sharedPreferences.unregisterOnSharedPreferenceChangeListener(sharedPreferenceChangeListener);
+    }
+
+
     public boolean isEnabled() {
         return bluetoothAdapter != null && bluetoothAdapter.isEnabled();
     }
 
-    @Override
+    public SensorDataSet getSensorDataSet() {
-    protected void setUpChannel() {
+        return sensorDataSet;
+    }
+
+    public boolean isSensorDataSetValid() {
+        SensorDataSet sensorDataSet = getSensorDataSet();
+        if (sensorDataSet == null) {
+            return false;
+        }
+        return sensorDataSet.isRecent(MAX_SENSOR_DATE_SET_AGE_MS);
+    }
+
+    private void startCurrentSensor() {
         if (!isEnabled()) {
             Log.w(TAG, "Bluetooth not enabled.");
             return;
@@ -134,30 +187,30 @@ public class BluetoothRemoteSensorManager extends RemoteSensorManager {
             Log.w(TAG, "No bluetooth address.");
             return;
         }
-        Log.w(TAG, "Connecting to bluetooth address: " + address);
+        Log.i(TAG, "Connecting to bluetooth address: " + address);
 
         BluetoothDevice device;
         try {
             device = bluetoothAdapter.getRemoteDevice(address);
         } catch (IllegalArgumentException e) {
-            Log.d(TAG, "Unable to get remote device for: " + address, e);
+            Log.w(TAG, "Unable to get remote device for: " + address, e);
+
+            String toastMessage = context.getString(R.string.sensor_not_known, address);
+            Toast.makeText(context, toastMessage, Toast.LENGTH_LONG).show();
+
             return;
         }
-        bluetoothConnectionManager.connect(device);
+
+        disconnect();
+
+        bluetoothConnectionManager = new BluetoothConnectionManager(context, device, messageHandler);
+        bluetoothConnectionManager.connect();
     }
 
-    @Override
+    private void disconnect() {
-    protected void tearDownChannel() {
+        if (bluetoothConnectionManager != null) {
-        bluetoothConnectionManager.reset();
+            bluetoothConnectionManager.disconnect();
-    }
+            bluetoothConnectionManager = null;
-
+        }
-    @Override
-    public SensorState getSensorState() {
-        return bluetoothConnectionManager.getSensorState();
-    }
-
-    @Override
-    public SensorDataSet getSensorDataSet() {
-        return sensorDataSet;
     }
 }

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

@@ -1,135 +0,0 @@
-/*
- * Copyright 2010 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.services.sensors;
-
-import android.util.Log;
-
-import java.util.Timer;
-import java.util.TimerTask;
-
-import de.dennisguse.opentracks.content.sensor.SensorDataSet;
-import de.dennisguse.opentracks.content.sensor.SensorState;
-
-/**
- * Manage the connection to a remote sensor.
- *
- * @author Sandor Dornbush
- */
-public abstract class RemoteSensorManager {
-
-    public static final long MAX_SENSOR_DATE_SET_AGE = 5000;
-    public static final long MAX_SENSOR_STATE_AGE = 20000;
-
-    private static final String TAG = RemoteSensorManager.class.getSimpleName();
-    private static final int RETRY_PERIOD = 20000;
-
-    private SensorState sensorState = SensorState.NONE;
-    private long sensorStateTimestamp = System.currentTimeMillis();
-
-    private TimerTask timerTask;
-    private Timer timer;
-
-    /**
-     * Returns true if the sensor is enabled.
-     */
-    public abstract boolean isEnabled();
-
-    /**
-     * Sets up the sensor channel.
-     */
-    protected abstract void setUpChannel();
-
-    /**
-     * Tears down the sensor channel.
-     */
-    protected abstract void tearDownChannel();
-
-    /**
-     * Gets the sensor data set.
-     */
-    public abstract SensorDataSet getSensorDataSet();
-
-    /**
-     * Starts the sensor.
-     */
-    public void startSensor() {
-        setUpChannel();
-        timerTask = new TimerTask() {
-            @Override
-            public void run() {
-                switch (getSensorState()) {
-                    case CONNECTING:
-                        if (System.currentTimeMillis() - sensorStateTimestamp > MAX_SENSOR_STATE_AGE) {
-                            Log.i(TAG, "Retry setUpChannel");
-                            setUpChannel();
-                        }
-                        break;
-                    case DISCONNECTED:
-                        setUpChannel();
-                        break;
-                    default: // NONE, CONNECTED or SENDING
-                }
-            }
-        };
-        timer = new Timer(RemoteSensorManager.class.getSimpleName());
-        timer.schedule(timerTask, RETRY_PERIOD, RETRY_PERIOD);
-    }
-
-    /**
-     * Stops the sensor.
-     */
-    public void stopSensor() {
-        if (timerTask != null) {
-            timerTask.cancel();
-            timerTask = null;
-        }
-        if (timer != null) {
-            timer.cancel();
-            timer.purge();
-            timer = null;
-        }
-        tearDownChannel();
-    }
-
-    /**
-     * Gets the sensor state.
-     */
-    public SensorState getSensorState() {
-        return sensorState;
-    }
-
-    /**
-     * Sets the sensor state.
-     *
-     * @param sensorState the sensor state
-     */
-    public void setSensorState(SensorState sensorState) {
-        sensorStateTimestamp = System.currentTimeMillis();
-        this.sensorState = sensorState;
-    }
-
-    /**
-     * Returns true if the sensor data set is valid.
-     */
-    public boolean isSensorDataSetValid() {
-        SensorDataSet sensorDataSet = getSensorDataSet();
-        if (sensorDataSet == null) {
-            return false;
-        }
-        return sensorDataSet.isRecent(MAX_SENSOR_DATE_SET_AGE);
-    }
-}

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

@@ -19,16 +19,14 @@ package de.dennisguse.opentracks.services.sensors;
 import android.content.Context;
 
 /**
- * A factory of {@link RemoteSensorManager}.
+ * A factory of {@link BluetoothRemoteSensorManager}.
  *
  * @author Sandor Dornbush
  */
 public class RemoteSensorManagerFactory {
 
-    private static RemoteSensorManager remoteSensorManagerSystem = null;
+    private static BluetoothRemoteSensorManager remoteSensorManagerSystem = null;
 
-    //TODO Check if still needed? Is there a missing features?
-    private static RemoteSensorManager remoteSensorManagerTemporary = null;
 
     private RemoteSensorManagerFactory() {
     }
@@ -38,11 +36,10 @@ public class RemoteSensorManagerFactory {
      *
      * @param context the context
      */
-    public static RemoteSensorManager getSystemSensorManager(Context context) {
+    public static BluetoothRemoteSensorManager getSystemSensorManager(Context context) {
-        releaseSensorManagerTemporary();
         releaseSystemSensorManager();
         remoteSensorManagerSystem = getSensorManager(context);
-        remoteSensorManagerSystem.startSensor();
+        remoteSensorManagerSystem.start();
         return remoteSensorManagerSystem;
     }
 
@@ -51,40 +48,17 @@ public class RemoteSensorManagerFactory {
      */
     public static void releaseSystemSensorManager() {
         if (remoteSensorManagerSystem != null) {
-            remoteSensorManagerSystem.stopSensor();
+            remoteSensorManagerSystem.stop();
         }
         remoteSensorManagerSystem = null;
     }
 
-    /**
-     * Gets the temp sensor manager.
-     */
-    public static RemoteSensorManager getSensorManagerTemporary(Context context) {
-        releaseSensorManagerTemporary();
-        if (remoteSensorManagerSystem != null) {
-            return null;
-        }
-        remoteSensorManagerTemporary = getSensorManager(context);
-        remoteSensorManagerTemporary.startSensor();
-        return remoteSensorManagerTemporary;
-    }
-
-    /**
-     * Releases the temp sensor manager.
-     */
-    private static void releaseSensorManagerTemporary() {
-        if (remoteSensorManagerTemporary != null) {
-            remoteSensorManagerTemporary.stopSensor();
-        }
-        remoteSensorManagerTemporary = null;
-    }
-
     /**
      * Gets the sensor manager.
      *
      * @param context the context
      */
-    private static RemoteSensorManager getSensorManager(Context context) {
+    private static BluetoothRemoteSensorManager getSensorManager(Context context) {
         return new BluetoothRemoteSensorManager(context);
     }
 }

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

@@ -17,8 +17,7 @@
 package de.dennisguse.opentracks.settings;
 
 import android.content.Context;
-import android.os.Parcelable;
+import android.os.Bundle;
-import android.preference.DialogPreference;
 import android.util.AttributeSet;
 import android.view.KeyEvent;
 import android.view.MotionEvent;
@@ -28,7 +27,11 @@ import android.widget.ArrayAdapter;
 import android.widget.AutoCompleteTextView;
 import android.widget.Spinner;
 
+import androidx.preference.DialogPreference;
+import androidx.preference.PreferenceDialogFragmentCompat;
+
 import de.dennisguse.opentracks.R;
+import de.dennisguse.opentracks.fragments.ChooseActivityTypeDialogFragment;
 import de.dennisguse.opentracks.util.PreferencesUtils;
 import de.dennisguse.opentracks.util.TrackIconUtils;
 
@@ -39,35 +42,59 @@ import de.dennisguse.opentracks.util.TrackIconUtils;
  */
 public class ActivityTypePreference extends DialogPreference {
 
-    private RecordingSettingsActivity recordingSettingsActivity;
+    private SummaryProvider<DialogPreference> summaryProvider = new SummaryProvider<DialogPreference>() {
-    private AutoCompleteTextView textView;
+        @Override
-    private Spinner spinner;
+        public CharSequence provideSummary(DialogPreference preference) {
+            String defaultActivity = PreferencesUtils.getString(ActivityTypePreference.this.getContext(), R.string.default_activity_key, PreferencesUtils.DEFAULT_ACTIVITY_DEFAULT);
+            return defaultActivity != null && !defaultActivity.equals(PreferencesUtils.DEFAULT_ACTIVITY_DEFAULT) ? defaultActivity : getContext().getString(R.string.value_unknown);
+        }
+    };
 
     public ActivityTypePreference(Context context, AttributeSet attrs) {
         super(context, attrs);
-        setDialogLayoutResource(R.layout.activity_type_preference);
+        setDialogLayoutResource(R.layout.preference_activity_type);
         setPositiveButtonText(android.R.string.ok);
         setNegativeButtonText(android.R.string.cancel);
         setDialogIcon(null);
-        setPersistent(false);
+        setPersistent(true);
+        //TODO: for some reason the summary is not updated; after changing it. Enable summaryprovider, when fixed.
+//        setSummaryProvider(summaryProvider);
     }
 
     @Override
-    protected View onCreateDialogView() {
+    public int getDialogLayoutResource() {
-        View view = super.onCreateDialogView();
+        return R.layout.preference_activity_type;
+    }
+
+    public static class ActivityPreferenceDialog extends PreferenceDialogFragmentCompat {
+
+        private AutoCompleteTextView textView;
+        private Spinner spinner;
+
+        static ActivityPreferenceDialog newInstance(String preferenceKey) {
+            ActivityTypePreference.ActivityPreferenceDialog dialog = new ActivityTypePreference.ActivityPreferenceDialog();
+            final Bundle bundle = new Bundle(1);
+            bundle.putString(PreferenceDialogFragmentCompat.ARG_KEY, preferenceKey);
+            dialog.setArguments(bundle);
+
+            return dialog;
+        }
+
+        @Override
+        protected void onBindDialogView(View view) {
+            super.onBindDialogView(view);
+
+            final Context context = getActivity();
+
             textView = view.findViewById(R.id.activity_type_preference_text_view);
-        spinner = view.findViewById(R.id.activity_type_preference_spinner);
+            String category = PreferencesUtils.getString(context, R.string.default_activity_key, PreferencesUtils.DEFAULT_ACTIVITY_DEFAULT);
-
-        String category = PreferencesUtils.getString(
-                getContext(), R.string.default_activity_key, PreferencesUtils.DEFAULT_ACTIVITY_DEFAULT);
             textView.setText(category);
-
+            ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(context, R.array.activity_types, android.R.layout.simple_dropdown_item_1line);
-        ArrayAdapter<CharSequence> adapter = ArrayAdapter.createFromResource(getContext(), R.array.activity_types, android.R.layout.simple_dropdown_item_1line);
             textView.setAdapter(adapter);
             textView.setOnItemClickListener(new AdapterView.OnItemClickListener() {
                 @Override
                 public void onItemClick(AdapterView<?> parent, View v, int position, long id) {
-                String iconValue = TrackIconUtils.getIconValue(getContext(), (String) textView.getAdapter().getItem(position));
+                    String iconValue = TrackIconUtils.getIconValue(context, (String) textView.getAdapter().getItem(position));
                     TrackIconUtils.setIconSpinner(spinner, iconValue);
                 }
             });
@@ -75,19 +102,20 @@ public class ActivityTypePreference extends DialogPreference {
                 @Override
                 public void onFocusChange(View v, boolean hasFocus) {
                     if (!hasFocus) {
-                    String iconValue = TrackIconUtils.getIconValue(getContext(), textView.getText().toString());
+                        String iconValue = TrackIconUtils.getIconValue(context, textView.getText().toString());
                         TrackIconUtils.setIconSpinner(spinner, iconValue);
                     }
                 }
             });
 
-        String iconValue = TrackIconUtils.getIconValue(getContext(), category);
+            String iconValue = TrackIconUtils.getIconValue(context, category);
-        spinner.setAdapter(TrackIconUtils.getIconSpinnerAdapter(getContext(), iconValue));
+            spinner = view.findViewById(R.id.activity_type_preference_spinner);
+            spinner.setAdapter(TrackIconUtils.getIconSpinnerAdapter(context, iconValue));
             spinner.setOnTouchListener(new View.OnTouchListener() {
                 @Override
                 public boolean onTouch(View v, MotionEvent event) {
                     if (event.getAction() == MotionEvent.ACTION_UP) {
-                    recordingSettingsActivity.showChooseActivityTypeDialog();
+                        showIconSelectDialog();
                     }
                     return true;
                 }
@@ -96,49 +124,37 @@ public class ActivityTypePreference extends DialogPreference {
                 @Override
                 public boolean onKey(View v, int keyCode, KeyEvent event) {
                     if (keyCode == KeyEvent.KEYCODE_DPAD_CENTER) {
-                    recordingSettingsActivity.showChooseActivityTypeDialog();
+                        showIconSelectDialog();
                     }
                     return true;
                 }
             });
-        return view;
+        }
+
+        private void showIconSelectDialog() {
+            String category = PreferencesUtils.getString(getActivity(), R.string.default_activity_key, PreferencesUtils.DEFAULT_ACTIVITY_DEFAULT);
+            ChooseActivityTypeDialogFragment.showDialog(getActivity().getSupportFragmentManager(), category);
         }
 
         @Override
-    protected void onDialogClosed(boolean positiveResult) {
+        public void onDialogClosed(boolean positiveResult) {
             if (positiveResult) {
-            String value = textView.getText().toString();
+                String newDefaultActivity = textView.getText().toString();
-            if (callChangeListener(value)) {
+                if (getPreference().callChangeListener(newDefaultActivity)) {
-                PreferencesUtils.setString(getContext(), R.string.default_activity_key, value);
+                    PreferencesUtils.setString(getActivity(), R.string.default_activity_key, newDefaultActivity);
                 }
             }
         }
 
-    @Override
-    protected void onRestoreInstanceState(Parcelable state) {
-        super.onRestoreInstanceState(state);
-        String iconValue = TrackIconUtils.getIconValue(getContext(), textView.getText().toString());
-        TrackIconUtils.setIconSpinner(spinner, iconValue);
-        textView.clearFocus();
-    }
-
-    /**
-     * Sets the recording settings activity.
-     *
-     * @param activity the activity
-     */
-    void setRecordingSettingsActivity(RecordingSettingsActivity activity) {
-        recordingSettingsActivity = activity;
-    }
-
         /**
          * Updates the value of the dialog.
          *
          * @param iconValue the icon value
          */
-    void updateValue(String iconValue) {
+        public void updateUI(String iconValue) {
             TrackIconUtils.setIconSpinner(spinner, iconValue);
-        textView.setText(recordingSettingsActivity.getString(TrackIconUtils.getIconActivityType(iconValue)));
+            textView.setText(getActivity().getString(TrackIconUtils.getIconActivityType(iconValue)));
             textView.clearFocus();
         }
     }
+}

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

@@ -0,0 +1,213 @@
+package de.dennisguse.opentracks.settings;
+
+import android.bluetooth.BluetoothAdapter;
+import android.content.Context;
+
+import androidx.preference.ListPreference;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import de.dennisguse.opentracks.R;
+import de.dennisguse.opentracks.util.BluetoothUtils;
+import de.dennisguse.opentracks.util.PreferencesUtils;
+import de.dennisguse.opentracks.util.UnitConversions;
+
+final class PreferenceHelper {
+
+    /**
+     * Sets the min recording interval options.
+     *
+     * @param options the options
+     * @param values  the values
+     */
+    static void setMinRecordingIntervalOptions(Context context, String[] options, String[] values) {
+        for (int i = 0; i < values.length; i++) {
+            int value = Integer.parseInt(values[i]);
+            switch (value) {
+                case PreferencesUtils.MIN_RECORDING_INTERVAL_ADAPT_BATTERY_LIFE:
+                    options[i] = context.getString(R.string.value_adapt_battery_life);
+                    break;
+                case PreferencesUtils.MIN_RECORDING_INTERVAL_ADAPT_ACCURACY:
+                    options[i] = context.getString(R.string.value_adapt_accuracy);
+                    break;
+                case PreferencesUtils.MIN_RECORDING_INTERVAL_DEFAULT:
+                    options[i] = context.getString(R.string.value_smallest_recommended);
+                    break;
+                default:
+                    options[i] = value < 60 ? context.getString(R.string.value_integer_second, value) : context.getString(R.string.value_integer_minute, value / 60);
+            }
+        }
+    }
+
+    /**
+     * Sets the recording distance interval options.
+     *
+     * @param options     the options
+     * @param values      the values
+     * @param metricUnits true for metric units
+     */
+    static void setRecordingDistanceIntervalOptions(Context context, String[] options, String[] values, boolean metricUnits) {
+        for (int i = 0; i < values.length; i++) {
+            int value = Integer.parseInt(values[i]);
+            String displayValue;
+            if (metricUnits) {
+                displayValue = context.getString(R.string.value_integer_meter, value);
+                if (value == PreferencesUtils.RECORDING_DISTANCE_INTERVAL_DEFAULT) {
+                    options[i] = context.getString(R.string.value_integer_meter_recommended, value);
+                } else {
+                    options[i] = displayValue;
+                }
+            } else {
+                int feet = (int) (value * UnitConversions.M_TO_FT);
+                displayValue = context.getString(R.string.value_integer_feet, feet);
+                if (value == PreferencesUtils.RECORDING_DISTANCE_INTERVAL_DEFAULT) {
+                    options[i] = context.getString(R.string.value_integer_feet_recommended, feet);
+                } else {
+                    options[i] = displayValue;
+                }
+            }
+        }
+    }
+
+    /**
+     * Sets the max recording distance options.
+     *
+     * @param options     the options
+     * @param values      the values
+     * @param metricUnits true for metric units
+     */
+    static void setMaxRecordingDistanceOptions(Context context, String[] options, String[] values, boolean metricUnits) {
+        for (int i = 0; i < values.length; i++) {
+            int value = Integer.parseInt(values[i]);
+            String displayValue;
+            if (metricUnits) {
+                displayValue = context.getString(R.string.value_integer_meter, value);
+                if (value == PreferencesUtils.MAX_RECORDING_DISTANCE_DEFAULT) {
+                    options[i] = context.getString(R.string.value_integer_meter_recommended, value);
+                } else {
+                    options[i] = displayValue;
+                }
+            } else {
+                int feet = (int) (value * UnitConversions.M_TO_FT);
+                if (feet < 2000) {
+                    displayValue = context.getString(R.string.value_integer_feet, feet);
+                    if (value == PreferencesUtils.MAX_RECORDING_DISTANCE_DEFAULT) {
+                        options[i] = context.getString(R.string.value_integer_feet_recommended, feet);
+                    } else {
+                        options[i] = displayValue;
+                    }
+                } else {
+                    double mile = feet * UnitConversions.FT_TO_MI;
+                    displayValue = context.getString(R.string.value_float_mile, mile);
+                    options[i] = displayValue;
+                }
+            }
+        }
+    }
+
+    /**
+     * Sets the recording gps accuracy options.
+     *
+     * @param options     the options
+     * @param values      the values
+     * @param metricUnits true for metric units
+     */
+    static void setRecordingGpsAccuracyOptions(Context context, String[] options, String[] values, boolean metricUnits) {
+        for (int i = 0; i < values.length; i++) {
+            int value = Integer.parseInt(values[i]);
+            String displayValue;
+            if (metricUnits) {
+                displayValue = context.getString(R.string.value_integer_meter, value);
+                switch (value) {
+                    case PreferencesUtils.RECORDING_GPS_ACCURACY_DEFAULT:
+                        options[i] = context.getString(R.string.value_integer_meter_recommended, value);
+                        break;
+                    case PreferencesUtils.RECORDING_GPS_ACCURACY_EXCELLENT:
+                        options[i] = context.getString(R.string.value_integer_meter_excellent_gps, value);
+                        break;
+                    case PreferencesUtils.RECORDING_GPS_ACCURACY_POOR:
+                        options[i] = context.getString(R.string.value_integer_meter_poor_gps, value);
+                        break;
+                    default:
+                        options[i] = displayValue;
+                }
+            } else {
+                int feet = (int) (value * UnitConversions.M_TO_FT);
+                if (feet < 2000) {
+                    displayValue = context.getString(R.string.value_integer_feet, feet);
+                    switch (value) {
+                        case PreferencesUtils.RECORDING_GPS_ACCURACY_DEFAULT:
+                            options[i] = context.getString(R.string.value_integer_feet_recommended, feet);
+                            break;
+                        case PreferencesUtils.RECORDING_GPS_ACCURACY_EXCELLENT:
+                            options[i] = context.getString(R.string.value_integer_feet_excellent_gps, feet);
+                            break;
+                        default:
+                            options[i] = displayValue;
+                    }
+                } else {
+                    double mile = feet * UnitConversions.FT_TO_MI;
+                    displayValue = context.getString(R.string.value_float_mile, mile);
+                    if (value == PreferencesUtils.RECORDING_GPS_ACCURACY_POOR) {
+                        options[i] = context.getString(R.string.value_float_mile_poor_gps, mile);
+                    } else {
+                        options[i] = displayValue;
+                    }
+                }
+            }
+        }
+    }
+
+    /**
+     * Sets the auto resume track timeout options.
+     *
+     * @param options the options
+     * @param values  the values
+     */
+    static void setAutoResumeTrackTimeoutOptions(Context context, String[] options, String[] values) {
+        for (int i = 0; i < values.length; i++) {
+            int value = Integer.parseInt(values[i]);
+            switch (value) {
+                case PreferencesUtils.AUTO_RESUME_TRACK_TIMEOUT_NEVER:
+                    options[i] = context.getString(R.string.value_never);
+                    break;
+                case PreferencesUtils.AUTO_RESUME_TRACK_TIMEOUT_ALWAYS:
+                    options[i] = context.getString(R.string.value_always);
+                    break;
+                default:
+                    options[i] = context.getString(R.string.value_integer_minute, value);
+            }
+        }
+    }
+
+    /**
+     * Configures the bluetooth sensor.
+     */
+    static void configureBluetoothSensorList(ListPreference preference) {
+        Context context = preference.getContext();
+
+        String value = PreferencesUtils.getString(context, R.string.bluetooth_sensor_key, PreferencesUtils.BLUETOOTH_SENSOR_DEFAULT);
+        List<String> devicesNameList = new ArrayList<>();
+        List<String> devicesAddressList = new ArrayList<>();
+        BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
+        if (bluetoothAdapter != null) {
+            BluetoothUtils.populateDeviceLists(bluetoothAdapter, devicesNameList, devicesAddressList);
+        }
+
+        // Was the previously configured device unpaired? Then forget it.
+        if (!devicesAddressList.contains(value)) {
+            value = PreferencesUtils.BLUETOOTH_SENSOR_DEFAULT;
+            PreferencesUtils.setString(context, R.string.bluetooth_sensor_key, value);
+        }
+
+        devicesNameList.add(0, context.getString(R.string.value_none));
+        devicesAddressList.add(0, PreferencesUtils.BLUETOOTH_SENSOR_DEFAULT);
+
+        String[] values = devicesAddressList.toArray(new String[0]);
+        preference.setEntryValues(values);
+
+        String[] options = devicesNameList.toArray(new String[0]);
+        preference.setEntries(options);
+    }
+}

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

@@ -1,303 +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.settings;
-
-import android.app.Dialog;
-import android.os.Bundle;
-import android.preference.ListPreference;
-import android.preference.Preference;
-import android.preference.PreferenceActivity;
-
-import de.dennisguse.opentracks.R;
-import de.dennisguse.opentracks.fragments.ChooseActivityTypeDialogFragment;
-import de.dennisguse.opentracks.fragments.ChooseActivityTypeDialogFragment.ChooseActivityTypeCaller;
-import de.dennisguse.opentracks.util.PreferencesUtils;
-import de.dennisguse.opentracks.util.StringUtils;
-import de.dennisguse.opentracks.util.UnitConversions;
-
-/**
- * An activity for accessing recording settings.
- *
- * @author Jimmy Shih
- */
-public class RecordingSettingsActivity extends PreferenceActivity implements ChooseActivityTypeCaller {
-
-    private static final int DIALOG_CHOOSE_ACTIVITY = 0;
-
-    private ActivityTypePreference activityTypePreference;
-
-    @Override
-    protected void onCreate(Bundle bundle) {
-        super.onCreate(bundle);
-        addPreferencesFromResource(R.xml.settings_recording);
-
-        boolean metricUnits = PreferencesUtils.isMetricUnits(this);
-
-        configFrequencyPreference(R.string.voice_frequency_key, metricUnits);
-        configFrequencyPreference(R.string.split_frequency_key, metricUnits);
-        configDefaultActivity();
-        configListPreference(R.string.min_recording_interval_key, R.array.min_recording_interval_values, metricUnits);
-        configListPreference(R.string.recording_distance_interval_key, R.array.recording_distance_interval_values, metricUnits);
-        configListPreference(R.string.max_recording_distance_key, R.array.max_recording_distance_values, metricUnits);
-        configListPreference(R.string.recording_gps_accuracy_key, R.array.recording_gps_accuracy_values, metricUnits);
-        configListPreference(R.string.auto_resume_track_timeout_key, R.array.auto_resume_track_timeout_values, metricUnits);
-    }
-
-    @Override
-    protected Dialog onCreateDialog(int id, Bundle bundle) {
-        if (id != DIALOG_CHOOSE_ACTIVITY) {
-            return null;
-        }
-
-        String category = PreferencesUtils.getString(
-                this, R.string.default_activity_key, PreferencesUtils.DEFAULT_ACTIVITY_DEFAULT);
-        return ChooseActivityTypeDialogFragment.getDialog(this, category, this);
-    }
-
-    private void configFrequencyPreference(int key, boolean metricUnits) {
-        ListPreference preference = (ListPreference) findPreference(getString(key));
-
-        String[] options = StringUtils.getFrequencyOptions(this, metricUnits);
-        preference.setEntries(options);
-    }
-
-    private void configDefaultActivity() {
-        activityTypePreference = (ActivityTypePreference) findPreference(getString(R.string.default_activity_key));
-        String defaultActivity = PreferencesUtils.getString(
-                this, R.string.default_activity_key, PreferencesUtils.DEFAULT_ACTIVITY_DEFAULT);
-        activityTypePreference.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
-            @Override
-            public boolean onPreferenceChange(Preference pref, Object newValue) {
-                String stringValue = (String) newValue;
-                pref.setSummary(stringValue != null && !stringValue.equals(PreferencesUtils.DEFAULT_ACTIVITY_DEFAULT) ? stringValue : getString(R.string.value_unknown));
-                return true;
-            }
-        });
-        activityTypePreference.setSummary(defaultActivity != null && !defaultActivity.equals(PreferencesUtils.DEFAULT_ACTIVITY_DEFAULT) ? defaultActivity : getString(R.string.value_unknown));
-        activityTypePreference.setRecordingSettingsActivity(this);
-    }
-
-    private void configListPreference(int key, int valueArray, boolean metricUnits) {
-        ListPreference preference = (ListPreference) findPreference(getString(key));
-
-        @Deprecated //TODO Can we make values an int array?
-        String[] values = getResources().getStringArray(valueArray);
-        String[] options = new String[values.length];
-        switch (key) {
-            case R.string.min_recording_interval_key:
-                setMinRecordingIntervalOptions(options, values);
-                break;
-            case R.string.recording_distance_interval_key:
-                setRecordingDistanceIntervalOptions(options, values, metricUnits);
-                break;
-            case R.string.max_recording_distance_key:
-                setMaxRecordingDistanceOptions(options, values, metricUnits);
-                break;
-            case R.string.recording_gps_accuracy_key:
-                setRecordingGpsAccuracyOptions(options, values, metricUnits);
-                break;
-            case R.string.auto_resume_track_timeout_key:
-                setAutoResumeTrackTimeoutOptions(options, values);
-                break;
-            default:
-                return;
-        }
-
-        preference.setEntries(options);
-    }
-
-    /**
-     * Sets the min recording interval options.
-     *
-     * @param options the options
-     * @param values  the values
-     */
-    private void setMinRecordingIntervalOptions(String[] options, String[] values) {
-        for (int i = 0; i < values.length; i++) {
-            int value = Integer.parseInt(values[i]);
-            switch (value) {
-                case PreferencesUtils.MIN_RECORDING_INTERVAL_ADAPT_BATTERY_LIFE:
-                    options[i] = getString(R.string.value_adapt_battery_life);
-                    break;
-                case PreferencesUtils.MIN_RECORDING_INTERVAL_ADAPT_ACCURACY:
-                    options[i] = getString(R.string.value_adapt_accuracy);
-                    break;
-                case PreferencesUtils.MIN_RECORDING_INTERVAL_DEFAULT:
-                    options[i] = getString(R.string.value_smallest_recommended);
-                    break;
-                default:
-                    options[i] = value < 60 ? getString(R.string.value_integer_second, value)
-                            : getString(R.string.value_integer_minute, value / 60);
-            }
-        }
-    }
-
-    /**
-     * Sets the recording distance interval options.
-     *
-     * @param options     the options
-     * @param values      the values
-     * @param metricUnits true for metric units
-     */
-    private void setRecordingDistanceIntervalOptions(String[] options, String[] values, boolean metricUnits) {
-        for (int i = 0; i < values.length; i++) {
-            int value = Integer.parseInt(values[i]);
-            String displayValue;
-            if (metricUnits) {
-                displayValue = getString(R.string.value_integer_meter, value);
-                if (value == PreferencesUtils.RECORDING_DISTANCE_INTERVAL_DEFAULT) {
-                    options[i] = getString(R.string.value_integer_meter_recommended, value);
-                } else {
-                    options[i] = displayValue;
-                }
-            } else {
-                int feet = (int) (value * UnitConversions.M_TO_FT);
-                displayValue = getString(R.string.value_integer_feet, feet);
-                if (value == PreferencesUtils.RECORDING_DISTANCE_INTERVAL_DEFAULT) {
-                    options[i] = getString(R.string.value_integer_feet_recommended, feet);
-                } else {
-                    options[i] = displayValue;
-                }
-            }
-        }
-    }
-
-    /**
-     * Sets the max recording distance options.
-     *
-     * @param options     the options
-     * @param values      the values
-     * @param metricUnits true for metric units
-     */
-    private void setMaxRecordingDistanceOptions(String[] options, String[] values, boolean metricUnits) {
-        for (int i = 0; i < values.length; i++) {
-            int value = Integer.parseInt(values[i]);
-            String displayValue;
-            if (metricUnits) {
-                displayValue = getString(R.string.value_integer_meter, value);
-                if (value == PreferencesUtils.MAX_RECORDING_DISTANCE_DEFAULT) {
-                    options[i] = getString(R.string.value_integer_meter_recommended, value);
-                } else {
-                    options[i] = displayValue;
-                }
-            } else {
-                int feet = (int) (value * UnitConversions.M_TO_FT);
-                if (feet < 2000) {
-                    displayValue = getString(R.string.value_integer_feet, feet);
-                    if (value == PreferencesUtils.MAX_RECORDING_DISTANCE_DEFAULT) {
-                        options[i] = getString(R.string.value_integer_feet_recommended, feet);
-                    } else {
-                        options[i] = displayValue;
-                    }
-                } else {
-                    double mile = feet * UnitConversions.FT_TO_MI;
-                    displayValue = getString(R.string.value_float_mile, mile);
-                    options[i] = displayValue;
-                }
-            }
-        }
-    }
-
-    /**
-     * Sets the recording gps accuracy options.
-     *
-     * @param options     the options
-     * @param values      the values
-     * @param metricUnits true for metric units
-     */
-    private void setRecordingGpsAccuracyOptions(String[] options, String[] values, boolean metricUnits) {
-        for (int i = 0; i < values.length; i++) {
-            int value = Integer.parseInt(values[i]);
-            String displayValue;
-            if (metricUnits) {
-                displayValue = getString(R.string.value_integer_meter, value);
-                switch (value) {
-                    case PreferencesUtils.RECORDING_GPS_ACCURACY_DEFAULT:
-                        options[i] = getString(R.string.value_integer_meter_recommended, value);
-                        break;
-                    case PreferencesUtils.RECORDING_GPS_ACCURACY_EXCELLENT:
-                        options[i] = getString(R.string.value_integer_meter_excellent_gps, value);
-                        break;
-                    case PreferencesUtils.RECORDING_GPS_ACCURACY_POOR:
-                        options[i] = getString(R.string.value_integer_meter_poor_gps, value);
-                        break;
-                    default:
-                        options[i] = displayValue;
-                }
-            } else {
-                int feet = (int) (value * UnitConversions.M_TO_FT);
-                if (feet < 2000) {
-                    displayValue = getString(R.string.value_integer_feet, feet);
-                    switch (value) {
-                        case PreferencesUtils.RECORDING_GPS_ACCURACY_DEFAULT:
-                            options[i] = getString(R.string.value_integer_feet_recommended, feet);
-                            break;
-                        case PreferencesUtils.RECORDING_GPS_ACCURACY_EXCELLENT:
-                            options[i] = getString(R.string.value_integer_feet_excellent_gps, feet);
-                            break;
-                        default:
-                            options[i] = displayValue;
-                    }
-                } else {
-                    double mile = feet * UnitConversions.FT_TO_MI;
-                    displayValue = getString(R.string.value_float_mile, mile);
-                    if (value == PreferencesUtils.RECORDING_GPS_ACCURACY_POOR) {
-                        options[i] = getString(R.string.value_float_mile_poor_gps, mile);
-                    } else {
-                        options[i] = displayValue;
-                    }
-                }
-            }
-        }
-    }
-
-    /**
-     * Sets the auto resume track timeout options.
-     *
-     * @param options the options
-     * @param values  the values
-     */
-    private void setAutoResumeTrackTimeoutOptions(String[] options, String[] values) {
-        for (int i = 0; i < values.length; i++) {
-            int value = Integer.parseInt(values[i]);
-            switch (value) {
-                case PreferencesUtils.AUTO_RESUME_TRACK_TIMEOUT_NEVER:
-                    options[i] = getString(R.string.value_never);
-                    break;
-                case PreferencesUtils.AUTO_RESUME_TRACK_TIMEOUT_ALWAYS:
-                    options[i] = getString(R.string.value_always);
-                    break;
-                default:
-                    options[i] = getString(R.string.value_integer_minute, value);
-            }
-        }
-    }
-
-    public void showChooseActivityTypeDialog() {
-        try {
-            removeDialog(DIALOG_CHOOSE_ACTIVITY);
-        } catch (Exception e) {
-            // Can safely ignore.
-        }
-        showDialog(DIALOG_CHOOSE_ACTIVITY);
-    }
-
-    @Override
-    public void onChooseActivityTypeDone(String iconValue) {
-        activityTypePreference.updateValue(iconValue);
-    }
-}

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

@@ -1,11 +1,13 @@
 package de.dennisguse.opentracks.settings;
 
 import android.content.Context;
-import android.content.DialogInterface;
+import android.os.Bundle;
-import android.preference.DialogPreference;
 import android.util.AttributeSet;
 import android.widget.Toast;
 
+import androidx.preference.DialogPreference;
+import androidx.preference.PreferenceDialogFragmentCompat;
+
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.util.PreferencesUtils;
 
@@ -15,13 +17,24 @@ public class ResetDialogPreference extends DialogPreference {
         super(context, attrs);
     }
 
-    @Override
+    public static class ResetPreferenceDialog extends PreferenceDialogFragmentCompat {
-    public void onClick(DialogInterface dialog, int which) {
-        super.onClick(dialog, which);
-        if (which == DialogInterface.BUTTON_POSITIVE) {
-            PreferencesUtils.resetPreferences(getContext(), true);
 
-            Toast.makeText(getContext(), R.string.settings_reset_done, Toast.LENGTH_SHORT).show();
+        static PreferenceDialogFragmentCompat newInstance(String preferenceKey) {
+            ResetPreferenceDialog dialog = new ResetPreferenceDialog();
+            final Bundle bundle = new Bundle(1);
+            bundle.putString(PreferenceDialogFragmentCompat.ARG_KEY, preferenceKey);
+            dialog.setArguments(bundle);
+
+            return dialog;
+        }
+
+        @Override
+        public void onDialogClosed(boolean positiveResult) {
+            if (positiveResult) {
+                PreferencesUtils.resetPreferences(getActivity(), true);
+
+                Toast.makeText(getActivity(), R.string.settings_reset_done, Toast.LENGTH_SHORT).show();
+            }
         }
     }
 }

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

@@ -1,159 +1,182 @@
-/*
- * Copyright 2008 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.settings;
 
-import android.bluetooth.BluetoothAdapter;
-import android.content.Intent;
 import android.content.SharedPreferences;
 import android.os.Bundle;
-import android.preference.ListPreference;
-import android.preference.Preference;
-import android.preference.Preference.OnPreferenceClickListener;
-import android.preference.PreferenceActivity;
-import android.provider.Settings;
 
-import java.util.ArrayList;
+import androidx.appcompat.app.AppCompatActivity;
-import java.util.List;
+import androidx.appcompat.widget.Toolbar;
+import androidx.fragment.app.DialogFragment;
+import androidx.preference.ListPreference;
+import androidx.preference.Preference;
+import androidx.preference.PreferenceFragmentCompat;
 
 import de.dennisguse.opentracks.R;
-import de.dennisguse.opentracks.util.BluetoothDeviceUtils;
+import de.dennisguse.opentracks.fragments.ChooseActivityTypeDialogFragment;
-import de.dennisguse.opentracks.util.IntentUtils;
 import de.dennisguse.opentracks.util.PreferencesUtils;
+import de.dennisguse.opentracks.util.StringUtils;
 
-/**
+public class SettingsActivity extends AppCompatActivity implements ChooseActivityTypeDialogFragment.ChooseActivityTypeCaller {
- * An activity for accessing settings.
- *
- * @author Jimmy Shih
- */
-public class SettingsActivity extends PreferenceActivity {
 
-    private long recordingTrackId = PreferencesUtils.RECORDING_TRACK_ID_DEFAULT;
+    private PrefsFragment prefsFragment = new PrefsFragment();
+
+    @Override
+    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);
+
+        getSupportFragmentManager().beginTransaction().replace(R.id.settings_fragment, prefsFragment).commit();
+    }
+
+    @Override
+    public void onChooseActivityTypeDone(String iconValue) {
+        prefsFragment.setDefaultActivity(iconValue);
+    }
+
+    public static class PrefsFragment extends PreferenceFragmentCompat {
 
         /*
-     * Note that sharedPreferenceChangeListenr cannot be an anonymous inner class.
+         * Note that sharedPreferenceChangeListener cannot be an anonymous inner class.
          * Anonymous inner class will get garbage collected.
          */
         private final SharedPreferences.OnSharedPreferenceChangeListener sharedPreferenceChangeListener = new SharedPreferences.OnSharedPreferenceChangeListener() {
             @Override
             public void onSharedPreferenceChanged(SharedPreferences preferences, String key) {
-            if (key != null && key.equals(PreferencesUtils.getKey(SettingsActivity.this, R.string.recording_track_id_key))) {
+                getActivity().runOnUiThread(new Runnable() {
-                recordingTrackId = PreferencesUtils.getLong(SettingsActivity.this, R.string.recording_track_id_key);
-            }
-
-            //TODO Should only be called if something meaningful happens.
-            runOnUiThread(new Runnable() {
                     @Override
                     public void run() {
                         updateUI();
                     }
                 });
+
+                if (key == null || key.equals(PreferencesUtils.getKey(getActivity(), R.string.stats_units_key))) {
+                    getActivity().runOnUiThread(new Runnable() {
+                        @Override
+                        public void run() {
+                            updateUnits();
+                        }
+                    });
+                }
             }
         };
 
+        // Used to forward update from ChooseActivityTypeDialogFragment; TODO Could be replaced with LiveData.
+        private ActivityTypePreference.ActivityPreferenceDialog activityPreferenceDialog;
+
         @Override
-    protected void onCreate(Bundle bundle) {
+        public void onCreatePreferences(Bundle savedInstanceState, String rootKey) {
-        super.onCreate(bundle);
+            setPreferencesFromResource(R.xml.settings, rootKey);
-
+            updateUnits();
-        addPreferencesFromResource(R.xml.settings);
-
-        configPreference(R.string.settings_stats_key, StatsSettingsActivity.class);
-        configPreference(R.string.settings_recording_key, RecordingSettingsActivity.class);
-
-        findPreference(getString(R.string.settings_sensor_bluetooth_pairing_key))
-                .setOnPreferenceClickListener(new OnPreferenceClickListener() {
-                    public boolean onPreferenceClick(Preference preference) {
-                        Intent settingsIntent = new Intent(Settings.ACTION_BLUETOOTH_SETTINGS);
-                        startActivity(settingsIntent);
-                        return true;
-                    }
-                });
         }
 
         @Override
-    protected void onResume() {
+        public void onResume() {
             super.onResume();
-        PreferencesUtils.getSharedPreferences(this).registerOnSharedPreferenceChangeListener(sharedPreferenceChangeListener);
+            PreferencesUtils.getSharedPreferences(getActivity()).registerOnSharedPreferenceChangeListener(sharedPreferenceChangeListener);
-        recordingTrackId = PreferencesUtils.getLong(this, R.string.recording_track_id_key);
             updateUI();
-
-        configBluetoothSensor();
         }
 
         @Override
-    protected void onPause() {
+        public void onPause() {
             super.onPause();
-        PreferencesUtils.getSharedPreferences(this).unregisterOnSharedPreferenceChangeListener(sharedPreferenceChangeListener);
+            PreferencesUtils.getSharedPreferences(getActivity()).unregisterOnSharedPreferenceChangeListener(sharedPreferenceChangeListener);
         }
 
-    /**
+        private void configFrequencyPreference(int key, boolean metricUnits) {
-     * Configures a preference by starting a new activity when it is clicked.
+            ListPreference preference = findPreference(getString(key));
-     *
-     * @param key the preference key
-     * @param cl  the class to start the new activity
-     */
-    private void configPreference(int key, final Class<?> cl) {
-        Preference preference = findPreference(getString(key));
-        preference.setOnPreferenceClickListener(new OnPreferenceClickListener() {
-            @Override
-            public boolean onPreferenceClick(Preference pref) {
-                Intent intent = IntentUtils.newIntent(SettingsActivity.this, cl);
-                startActivity(intent);
-                return true;
-            }
-        });
-    }
 
-    /**
+            String[] options = StringUtils.getFrequencyOptions(getActivity(), metricUnits);
-     * Configures the bluetooth sensor.
-     */
-    private void configBluetoothSensor() {
-        ListPreference preference = (ListPreference) findPreference(getString(R.string.bluetooth_sensor_key));
-        String value = PreferencesUtils.getString(this, R.string.bluetooth_sensor_key, PreferencesUtils.BLUETOOTH_SENSOR_DEFAULT);
-        List<String> devicesNameList = new ArrayList<>();
-        List<String> devicesAddressList = new ArrayList<>();
-        BluetoothAdapter bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
-        if (bluetoothAdapter != null) {
-            BluetoothDeviceUtils.populateDeviceLists(bluetoothAdapter, devicesNameList, devicesAddressList);
-        }
-
-        // Was the previously configured device unpaired? Then forget it.
-        if (!devicesAddressList.contains(value)) {
-            value = PreferencesUtils.BLUETOOTH_SENSOR_DEFAULT;
-            PreferencesUtils.setString(this, R.string.bluetooth_sensor_key, value);
-        }
-
-        devicesNameList.add(0, getString(R.string.value_none));
-        devicesAddressList.add(0, PreferencesUtils.BLUETOOTH_SENSOR_DEFAULT);
-
-        String[] values = devicesAddressList.toArray(new String[0]);
-        preference.setEntryValues(values);
-
-        String[] options = devicesNameList.toArray(new String[0]);
             preference.setEntries(options);
         }
 
+        private void configListPreference(int key, int valueArray, boolean metricUnits) {
+            //TODO Can we make values an int array?
+            String[] values = getResources().getStringArray(valueArray);
+            final String[] options = new String[values.length];
+            switch (key) {
+                case R.string.min_recording_interval_key:
+                    PreferenceHelper.setMinRecordingIntervalOptions(getActivity(), options, values);
+                    break;
+                case R.string.recording_distance_interval_key:
+                    PreferenceHelper.setRecordingDistanceIntervalOptions(getActivity(), options, values, metricUnits);
+                    break;
+                case R.string.max_recording_distance_key:
+                    PreferenceHelper.setMaxRecordingDistanceOptions(getActivity(), options, values, metricUnits);
+                    break;
+                case R.string.recording_gps_accuracy_key:
+                    PreferenceHelper.setRecordingGpsAccuracyOptions(getActivity(), options, values, metricUnits);
+                    break;
+                case R.string.auto_resume_track_timeout_key:
+                    PreferenceHelper.setAutoResumeTrackTimeoutOptions(getActivity(), options, values);
+                    break;
+                default:
+                    return;
+            }
+
+            final ListPreference listPreference = findPreference(getString(key));
+            listPreference.setEntries(options);
+        }
+
+        @Override
+        public void onDisplayPreferenceDialog(Preference preference) {
+            DialogFragment dialogFragment = null;
+            if (preference instanceof ResetDialogPreference) {
+                dialogFragment = ResetDialogPreference.ResetPreferenceDialog.newInstance(preference.getKey());
+            } else if (preference instanceof ActivityTypePreference) {
+                activityPreferenceDialog = ActivityTypePreference.ActivityPreferenceDialog.newInstance(preference.getKey());
+                dialogFragment = activityPreferenceDialog;
+            }
+
+            if (dialogFragment != null) {
+                dialogFragment.setTargetFragment(this, 0);
+                dialogFragment.show(getFragmentManager(), getClass().getSimpleName());
+                return;
+            }
+
+            super.onDisplayPreferenceDialog(preference);
+        }
+
+        public void setDefaultActivity(String iconValue) {
+            if (activityPreferenceDialog != null) {
+                activityPreferenceDialog.updateUI(iconValue);
+            }
+        }
+
         private void updateUI() {
-        //TODO Remove the following if recordingTrackId is replaced by direct communication rather than via preferences.
+            final boolean isRecording = PreferencesUtils.isRecording(getActivity());
-        boolean isRecording = recordingTrackId != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT;
             Preference resetPreference = findPreference(getString(R.string.settings_reset_key));
             resetPreference.setSummary(isRecording ? getString(R.string.settings_not_while_recording) : "");
             resetPreference.setEnabled(!isRecording);
 
             Preference speedCheckBoxPreference = findPreference(getString(R.string.chart_show_speed_key));
-        speedCheckBoxPreference.setTitle(PreferencesUtils.isReportSpeed(this) ? R.string.stats_speed : R.string.stats_pace);
+            speedCheckBoxPreference.setTitle(PreferencesUtils.isReportSpeed(getActivity()) ? R.string.stats_speed : R.string.stats_pace);
+
+            ListPreference bluetoothPreference = findPreference(getString(R.string.bluetooth_sensor_key));
+            PreferenceHelper.configureBluetoothSensorList(bluetoothPreference);
+        }
+
+        private void updateUnits() {
+            boolean metricUnits = PreferencesUtils.isMetricUnits(getActivity());
+
+            configFrequencyPreference(R.string.voice_frequency_key, metricUnits);
+            configFrequencyPreference(R.string.split_frequency_key, metricUnits);
+            configListPreference(R.string.min_recording_interval_key, R.array.min_recording_interval_values, metricUnits);
+            configListPreference(R.string.recording_distance_interval_key, R.array.recording_distance_interval_values, metricUnits);
+            configListPreference(R.string.max_recording_distance_key, R.array.max_recording_distance_values, metricUnits);
+            configListPreference(R.string.recording_gps_accuracy_key, R.array.recording_gps_accuracy_values, metricUnits);
+            configListPreference(R.string.auto_resume_track_timeout_key, R.array.auto_resume_track_timeout_values, metricUnits);
+            configListPreference(R.string.auto_resume_track_timeout_key, R.array.auto_resume_track_timeout_values, metricUnits);
+
+            final ListPreference statsRatePreferences = findPreference(getString(R.string.stats_rate_key));
+            String[] options = getResources().getStringArray(metricUnits ? R.array.stats_rate_metric_options : R.array.stats_rate_imperial_options);
+            statsRatePreferences.setEntries(options);
+            //TODO This is a hack!!! Need to manually updated the summary as otherwise it will only be updated after scrolling down and up again (bring the object out of view).
+            //Check if this is still needed after upgraded PreferenceFragment.
+            statsRatePreferences.setSummary(statsRatePreferences.getEntry());
+        }
     }
 }

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

@@ -1,78 +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.settings;
-
-import android.os.Bundle;
-import android.preference.ListPreference;
-import android.preference.Preference;
-import android.preference.Preference.OnPreferenceChangeListener;
-import android.preference.PreferenceActivity;
-
-import de.dennisguse.opentracks.R;
-import de.dennisguse.opentracks.util.PreferencesUtils;
-
-/**
- * An activity for accessing stats settings.
- *
- * @author Jimmy Shih
- */
-public class StatsSettingsActivity extends PreferenceActivity {
-
-    @Override
-    protected void onCreate(Bundle bundle) {
-        super.onCreate(bundle);
-        addPreferencesFromResource(R.xml.settings_statistics);
-
-        configUnitsListPreference();
-        boolean metricUnits = PreferencesUtils.STATS_UNITS_DEFAULT.equals(PreferencesUtils.getString(this, R.string.stats_units_key, ""));
-        configRateListPreference(metricUnits);
-    }
-
-    /**
-     * Configures the preferred units list preference.
-     */
-    private void configUnitsListPreference() {
-        ListPreference listPreference = (ListPreference) findPreference(getString(R.string.stats_units_key));
-        final OnPreferenceChangeListener listener = new OnPreferenceChangeListener() {
-
-            @Override
-            public boolean onPreferenceChange(Preference pref, Object newValue) {
-                boolean metricUnits = PreferencesUtils.STATS_UNITS_DEFAULT.equals(newValue);
-                configRateListPreference(metricUnits);
-                return true;
-            }
-        };
-        listPreference.setOnPreferenceChangeListener(new Preference.OnPreferenceChangeListener() {
-            @Override
-            public boolean onPreferenceChange(Preference pref, Object newValue) {
-                return listener.onPreferenceChange(pref, newValue);
-            }
-        });
-    }
-
-    /**
-     * Configures the preferred rate list preference.
-     *
-     * @param metricUnits true if metric units
-     */
-    private void configRateListPreference(boolean metricUnits) {
-        ListPreference listPreference = (ListPreference) findPreference(getString(R.string.stats_rate_key));
-        String[] options = getResources().getStringArray(metricUnits ? R.array.stats_rate_metric_options : R.array.stats_rate_imperial_options);
-
-        listPreference.setEntries(options);
-    }
-}

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

@@ -0,0 +1,137 @@
+package de.dennisguse.opentracks.util;
+
+import android.app.Activity;
+import android.app.SearchManager;
+import android.content.ComponentName;
+import android.content.Context;
+import android.util.Log;
+import android.util.SparseBooleanArray;
+import android.view.ActionMode;
+import android.view.Menu;
+import android.view.MenuItem;
+import android.view.View;
+import android.widget.AbsListView;
+import android.widget.ListView;
+
+import androidx.appcompat.widget.SearchView;
+
+import java.util.ArrayList;
+
+import de.dennisguse.opentracks.ContextualActionModeCallback;
+import de.dennisguse.opentracks.R;
+import de.dennisguse.opentracks.SearchListActivity;
+import de.dennisguse.opentracks.TrackController;
+
+public class ActivityUtils {
+
+    private static final String TAG = ActivityUtils.class.getSimpleName();
+
+    public static void configureListViewContextualMenu(final ListView listView, final ContextualActionModeCallback contextualActionModeCallback) {
+        listView.setChoiceMode(ListView.CHOICE_MODE_MULTIPLE_MODAL);
+        listView.setMultiChoiceModeListener(new AbsListView.MultiChoiceModeListener() {
+
+            @Override
+            public boolean onCreateActionMode(ActionMode mode, Menu menu) {
+                mode.getMenuInflater().inflate(R.menu.list_context_menu, menu);
+                return true;
+            }
+
+            @Override
+            public boolean onPrepareActionMode(ActionMode mode, Menu menu) {
+                contextualActionModeCallback.onPrepare(menu, getCheckedPositions(listView), listView.getCheckedItemIds(), true);
+                return true;
+            }
+
+            @Override
+            public void onDestroyActionMode(ActionMode mode) {
+                // Do nothing
+            }
+
+            @Override
+            public void onItemCheckedStateChanged(ActionMode mode, int position, long id, boolean checked) {
+                mode.invalidate();
+            }
+
+            @Override
+            public boolean onActionItemClicked(ActionMode mode, MenuItem item) {
+                if (contextualActionModeCallback.onClick(item.getItemId(), getCheckedPositions(listView), listView.getCheckedItemIds())) {
+                    mode.finish();
+                }
+                return true;
+            }
+
+            /**
+             * Gets the checked positions in a list view.
+             *
+             * @param list the list view
+             */
+            private int[] getCheckedPositions(ListView list) {
+                SparseBooleanArray positions = list.getCheckedItemPositions();
+                ArrayList<Integer> arrayList = new ArrayList<>();
+                for (int i = 0; i < positions.size(); i++) {
+                    int key = positions.keyAt(i);
+                    if (positions.valueAt(i)) {
+                        arrayList.add(key);
+                    }
+                }
+                int[] result = new int[arrayList.size()];
+                for (int i = 0; i < arrayList.size(); i++) {
+                    result[i] = arrayList.get(i);
+                }
+                return result;
+            }
+        });
+    }
+
+    public static void configureSearchWidget(Activity activity, final MenuItem menuItem, final TrackController trackController) {
+        final SearchView searchView = (SearchView) menuItem.getActionView();
+        SearchManager searchManager = (SearchManager) activity.getSystemService(Context.SEARCH_SERVICE);
+        if (searchManager != null) {
+            //NOTE: for some reason activity.getComponentName() did not trigger the SearchListActivity
+            searchView.setSearchableInfo(searchManager.getSearchableInfo(new ComponentName(activity, SearchListActivity.class)));
+        } else {
+            Log.w(TAG, "Could not retrieve SearchManager.");
+        }
+        searchView.setQueryRefinementEnabled(true);
+        searchView.setSubmitButtonEnabled(true);
+        searchView.setOnQueryTextFocusChangeListener(new View.OnFocusChangeListener() {
+
+            @Override
+            public void onFocusChange(View v, boolean hasFocus) {
+                // Hide and show trackController when searchable widget has focus/no focus
+                if (trackController != null) {
+                    if (hasFocus) {
+                        trackController.hide();
+                    } else {
+                        trackController.show();
+                    }
+                }
+            }
+        });
+
+        searchView.setOnQueryTextListener(new SearchView.OnQueryTextListener() {
+            @Override
+            public boolean onQueryTextSubmit(String query) {
+                menuItem.collapseActionView();
+                return false;
+            }
+
+            @Override
+            public boolean onQueryTextChange(String newText) {
+                return false;
+            }
+        });
+        searchView.setOnSuggestionListener(new SearchView.OnSuggestionListener() {
+            @Override
+            public boolean onSuggestionSelect(int position) {
+                return false;
+            }
+
+            @Override
+            public boolean onSuggestionClick(int position) {
+                menuItem.collapseActionView();
+                return false;
+            }
+        });
+    }
+}

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

@@ -18,6 +18,7 @@ package de.dennisguse.opentracks.util;
 import android.bluetooth.BluetoothAdapter;
 import android.bluetooth.BluetoothClass;
 import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothGattCharacteristic;
 
 import java.util.List;
 import java.util.Set;
@@ -27,9 +28,9 @@ import java.util.Set;
  *
  * @author Rodrigo Damazio
  */
-public class BluetoothDeviceUtils {
+public class BluetoothUtils {
 
-    private BluetoothDeviceUtils() {
+    private BluetoothUtils() {
     }
 
     /**
@@ -53,4 +54,13 @@ public class BluetoothDeviceUtils {
             }
         }
     }
+
+    public static int parseHeartRate(BluetoothGattCharacteristic characteristic) {
+        //DOCUMENTATION https://www.bluetooth.com/specifications/gatt/characteristics/
+        byte[] raw = characteristic.getValue();
+        int index = ((raw[0] & 0x1) == 1) ? 2 : 1;
+        int format = (index == 1) ? BluetoothGattCharacteristic.FORMAT_UINT8 : BluetoothGattCharacteristic.FORMAT_UINT16;
+        return characteristic.getIntValue(format, index);
+    }
+
 }

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

@@ -29,6 +29,7 @@ import androidx.core.content.FileProvider;
 
 import java.io.File;
 import java.text.SimpleDateFormat;
+import java.util.ArrayList;
 import java.util.Date;
 
 import de.dennisguse.opentracks.R;
@@ -69,19 +70,32 @@ public class IntentUtils {
      * @param context  the context
      * @param trackIds the track ids
      */
+    //TODO Share mulitple tracks in different files!
     public static Intent newShareFileIntent(Context context, long[] trackIds) {
+        if (trackIds.length == 0) {
+            throw new RuntimeException("Need to share at least one track.");
+        }
         String trackDescription = "";
         if (trackIds.length == 1) {
             Track track = ContentProviderUtils.Factory.get(context).getTrack(trackIds[0]);
             trackDescription = track == null ? "" : new DescriptionGeneratorImpl(context).generateTrackDescription(track, false);
         }
-        Pair<Uri, String> uriAndMime = ShareContentProvider.createURI(trackIds, TrackFileFormat.KMZ_WITH_TRACKDETAIL_AND_SENSORDATA_AND_PICTURES);
 
-        return new Intent(Intent.ACTION_SEND)
+        String action = trackIds.length == 1 ? Intent.ACTION_SEND : Intent.ACTION_SEND_MULTIPLE;
-                .putExtra(Intent.EXTRA_STREAM, uriAndMime.first)
+        String mime = "";
+
+        ArrayList<Uri> uris = new ArrayList<>();
+        for (long trackId : trackIds) {
+            Pair<Uri, String> uriAndMime = ShareContentProvider.createURI(new long[]{trackId}, TrackFileFormat.KMZ_WITH_TRACKDETAIL_AND_SENSORDATA_AND_PICTURES);
+            uris.add(uriAndMime.first);
+            mime = uriAndMime.second;
+        }
+
+        return new Intent(action)
                 .putExtra(Intent.EXTRA_SUBJECT, context.getString(R.string.share_track_subject))
                 .putExtra(Intent.EXTRA_TEXT, context.getString(R.string.share_track_share_file_body, trackDescription))
-                .setType(uriAndMime.second)
+                .putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris)
+                .setType(mime)
                 .addFlags(Intent.FLAG_GRANT_READ_URI_PERMISSION);
     }
 

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

@@ -19,7 +19,8 @@ package de.dennisguse.opentracks.util;
 import android.content.Context;
 import android.content.SharedPreferences;
 import android.content.SharedPreferences.Editor;
-import android.preference.PreferenceManager;
+
+import androidx.preference.PreferenceManager;
 
 import de.dennisguse.opentracks.R;
 
@@ -252,9 +253,16 @@ public class PreferencesUtils {
         return CHART_X_AXIS_DEFAULT.equals(getString(context, R.string.chart_x_axis_key, CHART_X_AXIS_DEFAULT));
     }
 
+    public static boolean isRecording(Context context) {
+        long recordingTrackId = PreferencesUtils.getLong(context, R.string.recording_track_id_key);
+        return recordingTrackId != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT;
+    }
+
+    public static boolean isRecording(long recordingTrackId) {
+        return recordingTrackId != PreferencesUtils.RECORDING_TRACK_ID_DEFAULT;
+    }
+
     public static void resetPreferences(Context context, boolean readAgain) {
         PreferenceManager.setDefaultValues(context, R.xml.settings, readAgain);
-        PreferenceManager.setDefaultValues(context, R.xml.settings_recording, readAgain);
-        PreferenceManager.setDefaultValues(context, R.xml.settings_statistics, readAgain);
     }
 }

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

@@ -0,0 +1,40 @@
+package de.dennisguse.opentracks.util;
+
+import android.app.ActivityManager;
+import android.content.ComponentName;
+import android.content.Context;
+
+import java.util.List;
+
+import de.dennisguse.opentracks.services.TrackRecordingService;
+
+public class ServiceUtils {
+
+    private ServiceUtils() {
+    }
+
+    /**
+     * Returns true if the recording service is running.
+     *
+     * @param context the current context
+     */
+    @Deprecated
+    public static boolean isTrackRecordingServiceRunning(Context context) {
+        ActivityManager activityManager = (ActivityManager) context.getSystemService(Context.ACTIVITY_SERVICE);
+        if (activityManager == null) {
+            return false;
+        }
+
+        //TODO This approach is deprecated as of API level 26 and should be replaced.
+        List<ActivityManager.RunningServiceInfo> services = activityManager.getRunningServices(Integer.MAX_VALUE);
+
+        for (ActivityManager.RunningServiceInfo serviceInfo : services) {
+            ComponentName componentName = serviceInfo.service;
+            String serviceName = componentName.getClassName();
+            if (TrackRecordingService.class.getName().equals(serviceName)) {
+                return true;
+            }
+        }
+        return false;
+    }
+}

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

@@ -17,7 +17,6 @@
 package de.dennisguse.opentracks.util;
 
 import android.app.Activity;
-import android.content.Context;
 import android.location.Location;
 import android.util.Pair;
 import android.view.View;
@@ -26,7 +25,7 @@ import android.widget.TextView;
 
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.content.sensor.SensorDataSet;
-import de.dennisguse.opentracks.services.sensors.RemoteSensorManager;
+import de.dennisguse.opentracks.services.sensors.BluetoothRemoteSensorManager;
 import de.dennisguse.opentracks.stats.TripStatistics;
 
 /**
@@ -77,7 +76,7 @@ public class StatsUtils {
 
         if (showGradeElevation) {
             double altitude = location != null && location.hasAltitude() ? location.getAltitude() : Double.NaN;
-            Pair<String, String> parts = formatElevation(activity, altitude, metricUnits);
+            Pair<String, String> parts = StringUtils.formatElevation(activity, altitude, metricUnits);
 
             TextView elevationValue = activity.findViewById(R.id.stats_elevation_current_value);
             elevationValue.setText(parts.first);
@@ -119,9 +118,11 @@ public class StatsUtils {
             TextView heartRateSensor = activity.findViewById(R.id.stats_sensor_heart_rate_sensor_value);
             String heartRate = activity.getString(R.string.value_unknown);
             String sensor = activity.getString(R.string.value_unknown);
-            if (sensorDataSet != null && sensorDataSet.hasHeartRate() && sensorDataSet.isRecent(RemoteSensorManager.MAX_SENSOR_DATE_SET_AGE)) {
+            if (sensorDataSet != null && sensorDataSet.isRecent(BluetoothRemoteSensorManager.MAX_SENSOR_DATE_SET_AGE_MS)) {
-                heartRate = StringUtils.formatDecimal(sensorDataSet.getHeartRate(), 0);
                 sensor = sensorDataSet.getSensorName();
+                if (sensorDataSet.hasHeartRate()) {
+                    heartRate = StringUtils.formatDecimal(sensorDataSet.getHeartRate(), 0);
+                }
             }
 
             heartRateValue.setText(heartRate);
@@ -250,7 +251,7 @@ public class StatsUtils {
             if (showElevation) {
                 {
                     double elevation = tripStatistics == null ? Double.NaN : tripStatistics.getMinElevation();
-                    Pair<String, String> parts = formatElevation(activity, elevation, metricUnits);
+                    Pair<String, String> parts = StringUtils.formatElevation(activity, elevation, metricUnits);
 
                     TextView elevationValue = activity.findViewById(R.id.stats_elevation_min_value);
                     elevationValue.setText(parts.first);
@@ -260,7 +261,7 @@ public class StatsUtils {
 
                 {
                     double elevation = tripStatistics == null ? Double.NaN : tripStatistics.getMaxElevation();
-                    Pair<String, String> parts = formatElevation(activity, elevation, metricUnits);
+                    Pair<String, String> parts = StringUtils.formatElevation(activity, elevation, metricUnits);
 
                     TextView elevationValue = activity.findViewById(R.id.stats_elevation_max_value);
                     elevationValue.setText(parts.first);
@@ -270,26 +271,4 @@ public class StatsUtils {
             }
         }
     }
-
-    /**
-     * Sets an elevation value.
-     *
-     * @param context     the context
-     * @param elevation   the elevation in meters
-     * @param metricUnits true if metric units
-     * @return the formatted elevation (or null) and it's unit as {@link Pair}
-     */
-    // TODO Move to StringUtils
-    private static Pair<String, String> formatElevation(Context context, double elevation, boolean metricUnits) {
-        String value = context.getString(R.string.value_unknown);
-        String unit = context.getString(metricUnits ? R.string.unit_meter : R.string.unit_feet);
-        if (!Double.isNaN(elevation) && !Double.isInfinite(elevation)) {
-            if (metricUnits) {
-                value = StringUtils.formatDecimal(elevation);
-            } else {
-                value = StringUtils.formatDecimal(elevation * UnitConversions.M_TO_FT);
-            }
-        }
-        return new Pair<>(value, unit);
-    }
 }

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

@@ -21,6 +21,7 @@ import android.text.TextUtils;
 import android.text.format.DateUtils;
 import android.util.Pair;
 
+import java.text.DecimalFormat;
 import java.text.ParsePosition;
 import java.text.SimpleDateFormat;
 import java.util.Date;
@@ -124,13 +125,20 @@ public class StringUtils {
         }
     }
 
-    static String formatDecimal(double value) {
+    private static String formatDecimal(double value) {
         return StringUtils.formatDecimal(value, 2);
     }
 
+    /**
+     * Format a decimal number while removing trailing zeros of the decimal part (if present).
+     */
     static String formatDecimal(double value, int decimalPlaces) {
-        String result = String.format(Locale.getDefault(), "%1$,." + decimalPlaces + "f", value);
+        if (decimalPlaces < 1) {
-        return result.replaceAll("[0]*$", "").replaceAll("\\.$", "");
+            return Long.toString(Math.round(value));
+        }
+
+        String format = "#." + new String(new char[decimalPlaces]).replace("\0", "#");
+        return new DecimalFormat(format).format(value);
     }
 
     /**
@@ -361,4 +369,25 @@ public class StringUtils {
         }
         return options;
     }
+
+    /**
+     * Sets an elevation value.
+     *
+     * @param context     the context
+     * @param elevation   the elevation in meters
+     * @param metricUnits true if metric units
+     * @return the formatted elevation (or null) and it's unit as {@link Pair}
+     */
+    public static Pair<String, String> formatElevation(Context context, double elevation, boolean metricUnits) {
+        String value = context.getString(R.string.value_unknown);
+        String unit = context.getString(metricUnits ? R.string.unit_meter : R.string.unit_feet);
+        if (!Double.isNaN(elevation) && !Double.isInfinite(elevation)) {
+            if (metricUnits) {
+                value = StringUtils.formatDecimal(elevation);
+            } else {
+                value = StringUtils.formatDecimal(elevation * UnitConversions.M_TO_FT);
+            }
+        }
+        return new Pair<>(value, unit);
+    }
 }

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

@@ -62,7 +62,7 @@ public class TrackIconUtils {
     private static final LinkedHashMap<String, Pair<Integer, Integer>> MAP = new LinkedHashMap<>();
 
     static {
-        //Reflects order in ChooseActivityTypeDialogFragment
+        //Reflects order in ChooseActivityTypeDialogFragmentActivity
         MAP.put(UNKNOWN, new Pair<>(R.string.activity_type_unknown, ACTIVITY_UNKNOWN_LOGO));
         MAP.put(RUN, new Pair<>(R.string.activity_type_running, R.drawable.ic_activity_run_24dp));
         MAP.put(WALK, new Pair<>(R.string.activity_type_walking, R.drawable.ic_activity_walk_24dp));

src/main/res/drawable/ic_share_24dp.xml

@@ -0,0 +1,10 @@
+<vector xmlns:android="http://schemas.android.com/apk/res/android"
+    android:width="24dp"
+    android:height="24dp"
+    android:tint="#FFFFFF"
+    android:viewportWidth="24.0"
+    android:viewportHeight="24.0">
+    <path
+        android:fillColor="#FF000000"
+        android:pathData="M18,16.08c-0.76,0 -1.44,0.3 -1.96,0.77L8.91,12.7c0.05,-0.23 0.09,-0.46 0.09,-0.7s-0.04,-0.47 -0.09,-0.7l7.05,-4.11c0.54,0.5 1.25,0.81 2.04,0.81 1.66,0 3,-1.34 3,-3s-1.34,-3 -3,-3 -3,1.34 -3,3c0,0.24 0.04,0.47 0.09,0.7L8.04,9.81C7.5,9.31 6.79,9 6,9c-1.66,0 -3,1.34 -3,3s1.34,3 3,3c0.79,0 1.5,-0.31 2.04,-0.81l7.12,4.16c-0.05,0.21 -0.08,0.43 -0.08,0.65 0,1.61 1.31,2.92 2.92,2.92 1.61,0 2.92,-1.31 2.92,-2.92s-1.31,-2.92 -2.92,-2.92z" />
+</vector>

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

@@ -16,7 +16,10 @@ limitations under the License.
 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    android:baselineAligned="false">
+    android:baselineAligned="false"
+    android:orientation="horizontal">
+
+    <include layout="@layout/toolbar" />
 
     <include layout="@layout/track_controller" />
 

src/main/res/layout/about.xml

@@ -4,6 +4,8 @@
     android:layout_height="match_parent"
     android:orientation="vertical">
 
+    <include layout="@layout/toolbar" />
+
     <ImageView
         android:id="@+id/imageView"
         android:layout_width="match_parent"

src/main/res/layout/marker_detail_activity.xml

@@ -17,6 +17,8 @@ limitations under the License.
     android:layout_width="match_parent"
     android:layout_height="match_parent">
 
+    <include layout="@layout/toolbar" />
+
     <androidx.viewpager.widget.ViewPager
         android:id="@+id/maker_detail_activity_view_pager"
         android:layout_width="match_parent"

src/main/res/layout/marker_edit.xml

@@ -18,6 +18,8 @@ limitations under the License.
     android:layout_height="match_parent"
     android:orientation="vertical">
 
+    <include layout="@layout/toolbar" />
+
     <ScrollView style="@style/ScrollView.WithBottomButtons">
 
         <LinearLayout

src/main/res/layout/marker_list.xml

@@ -13,9 +13,12 @@ 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.
 -->
-<merge xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <include layout="@layout/toolbar" />
 
     <ListView
         android:id="@+id/marker_list"
@@ -26,4 +29,4 @@ limitations under the License.
         android:id="@+id/marker_list_empty"
         style="@style/ListEmptyTextView"
         android:text="@string/marker_list_empty_message" />
-</merge>
+</LinearLayout>

src/main/res/layout/search_list.xml

@@ -13,9 +13,12 @@ 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.
 -->
-<merge xmlns:android="http://schemas.android.com/apk/res/android"
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
     android:layout_width="match_parent"
-    android:layout_height="match_parent">
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <include layout="@layout/toolbar" />
 
     <ListView
         android:id="@+id/search_list"
@@ -26,4 +29,4 @@ limitations under the License.
         android:id="@+id/search_list_empty"
         style="@style/ListEmptyTextView"
         android:text="@string/search_list_empty_message" />
-</merge>
+</LinearLayout>

src/main/res/layout/settings.xml

@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="utf-8"?>
+<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    android:orientation="vertical">
+
+    <include layout="@layout/toolbar" />
+
+    <FrameLayout
+        android:id="@+id/settings_fragment"
+        android:layout_width="fill_parent"
+        android:layout_height="wrap_content" />
+
+</LinearLayout>

src/main/res/layout/toolbar.xml

@@ -0,0 +1,12 @@
+<?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">
+
+    <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" />
+</merge>

src/main/res/layout/track_detail.xml

@@ -18,6 +18,8 @@ limitations under the License.
     android:layout_height="match_parent"
     android:orientation="vertical">
 
+    <include layout="@layout/toolbar" />
+
     <TabHost
         android:id="@+id/tackdetail_tabhost"
         android:layout_width="match_parent"

src/main/res/layout/track_edit.xml

@@ -18,6 +18,8 @@ limitations under the License.
     android:layout_height="match_parent"
     android:orientation="vertical">
 
+    <include layout="@layout/toolbar" />
+
     <ScrollView style="@style/ScrollView.WithBottomButtons">
 
         <LinearLayout

src/main/res/layout/track_list.xml

@@ -18,6 +18,8 @@ limitations under the License.
     android:layout_height="match_parent"
     android:orientation="vertical">
 
+    <include layout="@layout/toolbar" />
+
     <ListView
         android:id="@+id/track_list"
         android:layout_width="match_parent"

src/main/res/menu/list_context_menu.xml

@@ -13,30 +13,31 @@ 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.
 -->
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/list_context_menu_share"
-        android:actionProviderClass="android.widget.ShareActionProvider"
+        android:icon="@drawable/ic_share_24dp"
-        android:showAsAction="ifRoom"
+        android:title="@string/menu_share"
-        android:title="@string/menu_share" />
+        app:showAsAction="ifRoom" />
     <item
         android:id="@+id/list_context_menu_show_on_map"
         android:icon="@drawable/ic_map_24dp"
-        android:showAsAction="ifRoom"
+        android:title="@string/menu_show_on_map"
-        android:title="@string/menu_show_on_map" />
+        app:showAsAction="ifRoom" />
     <item
         android:id="@+id/list_context_menu_edit"
         android:icon="@drawable/ic_edit_24dp"
-        android:showAsAction="ifRoom"
+        android:title="@string/menu_edit"
-        android:title="@string/menu_edit" />
+        app:showAsAction="ifRoom" />
     <item
         android:id="@+id/list_context_menu_delete"
         android:icon="@drawable/ic_delete_forever_24dp"
-        android:showAsAction="ifRoom"
+        android:title="@string/menu_delete"
-        android:title="@string/menu_delete" />
+        app:showAsAction="ifRoom" />
     <item
         android:id="@+id/list_context_menu_select_all"
         android:icon="@drawable/ic_select_all_24dp"
-        android:showAsAction="ifRoom"
+        android:title="@string/menu_select_all"
-        android:title="@string/menu_select_all" />
+        app:showAsAction="ifRoom" />
 </menu>

src/main/res/menu/marker_detail.xml

@@ -13,20 +13,21 @@ 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.
 -->
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/marker_detail_show_on_map"
         android:icon="@drawable/ic_map_24dp"
-        android:showAsAction="ifRoom"
+        android:title="@string/menu_show_on_map"
-        android:title="@string/menu_show_on_map" />
+        app:showAsAction="ifRoom" />
     <item
         android:id="@+id/marker_detail_edit"
         android:icon="@drawable/ic_edit_24dp"
-        android:showAsAction="ifRoom"
+        android:title="@string/menu_edit"
-        android:title="@string/menu_edit" />
+        app:showAsAction="ifRoom" />
     <item
         android:id="@+id/marker_detail_delete"
         android:icon="@drawable/ic_delete_forever_24dp"
-        android:showAsAction="ifRoom"
+        android:title="@string/menu_delete"
-        android:title="@string/menu_delete" />
+        app:showAsAction="ifRoom" />
 </menu>

src/main/res/menu/marker_list.xml

@@ -13,15 +13,16 @@ 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.
 -->
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/marker_list_insert_marker"
         android:icon="@drawable/ic_marker_show_24dp"
-        android:showAsAction="ifRoom"
+        android:title="@string/menu_insert_marker"
-        android:title="@string/menu_insert_marker" />
+        app:showAsAction="ifRoom" />
     <item
         android:id="@+id/marker_list_search"
-        android:actionViewClass="android.widget.SearchView"
+        android:title="@string/menu_search"
-        android:showAsAction="ifRoom"
+        app:actionViewClass="androidx.appcompat.widget.SearchView"
-        android:title="@string/menu_search" />
+        app:showAsAction="ifRoom" />
 </menu>

src/main/res/menu/track_detail.xml

@@ -13,29 +13,30 @@ 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.
 -->
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/track_detail_insert_marker"
         android:icon="@drawable/ic_marker_add_24dp"
         android:orderInCategory="1"
-        android:showAsAction="ifRoom"
+        app:showAsAction="ifRoom"
         android:title="@string/menu_insert_marker" />
     <item
         android:id="@+id/track_detail_insert_photo"
         android:icon="@drawable/ic_camera_24dp"
         android:orderInCategory="2"
-        android:showAsAction="ifRoom"
+        app:showAsAction="ifRoom"
         android:title="@string/menu_insert_photo" />
     <item
         android:id="@+id/track_detail_menu_show_on_map"
         android:icon="@drawable/ic_map_24dp"
-        android:showAsAction="ifRoom"
+        app:showAsAction="ifRoom"
         android:title="@string/menu_show_on_map" />
     <item
         android:id="@+id/track_detail_share"
-        android:actionProviderClass="android.widget.ShareActionProvider"
+        android:icon="@drawable/ic_share_24dp"
         android:orderInCategory="4"
-        android:showAsAction="ifRoom"
+        app:showAsAction="ifRoom"
         android:title="@string/menu_share" />
     <item
         android:id="@+id/track_detail_markers"

src/main/res/menu/track_list.xml

@@ -13,27 +13,24 @@ 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.
 -->
-<menu xmlns:android="http://schemas.android.com/apk/res/android">
+<menu xmlns:android="http://schemas.android.com/apk/res/android"
+    xmlns:app="http://schemas.android.com/apk/res-auto">
     <item
         android:id="@+id/track_list_search"
-        android:actionViewClass="android.widget.SearchView"
+        android:title="@string/menu_search"
-        android:showAsAction="ifRoom"
+        app:actionViewClass="androidx.appcompat.widget.SearchView"
-        android:title="@string/menu_search" />
+        app:showAsAction="ifRoom" />
     <!-- Icon and title is overwritten by TrackListActivity -->
     <item
         android:id="@+id/track_list_start_gps"
         android:icon="@drawable/ic_gps_off_24dp"
-        android:showAsAction="ifRoom"
+        android:title="@string/menu_start_gps"
-        android:title="@string/menu_start_gps" />
+        app:showAsAction="ifRoom" />
     <item
         android:id="@+id/track_list_markers"
         android:icon="@drawable/ic_marker_show_24dp"
-        android:showAsAction="ifRoom"
+        android:title="@string/menu_markers"
-        android:title="@string/menu_markers" />
+        app:showAsAction="ifRoom" />
-    <item
-        android:id="@+id/track_list_aggregated_statistics"
-        android:icon="@drawable/ic_statistics_24dp"
-        android:title="@string/menu_aggregated_statistics" />
     <item
         android:id="@+id/track_list_delete_all"
         android:icon="@drawable/ic_delete_forever_24dp"

src/main/res/values/strings.xml

@@ -1054,7 +1054,9 @@ limitations under the License.
       sending data.">
     Sending
   </string>
-
+  <string name="sensor_not_known" translation_description="Error message if sensor is not available in Android (e.g., pairing was removed in Bluetooth Settings).">
+    Sensor %1$s is not known. Please check the settings.
+  </string>
     <!-- Settings -->
     <string name="settings_not_while_recording" translation_description="In settings, the summary for an option that is not available during a
       track recording.">
@@ -1271,11 +1273,20 @@ limitations under the License.
       Character limit: ~23 (1 line)">
     Bluetooth sensor
   </string>
-    <string name="settings_sensor_connected" translation_description="A message when a sensor is connected.
+  <string name="settings_sensor_connecting" translation_description="A message when a sensor is connecting.
 
       %1$s sensor name. E.g., 'Polar Bluetooth'.">
    Connected to %1$s
   </string>
+  <string name="settings_sensor_connected" translation_description="A message when a sensor is connected.
+      %1$s sensor name. E.g., 'Polar Bluetooth'.">
+   Connected to %1$s
+  </string>
+  <string name="settings_sensor_disconnected" translation_description="A message when a sensor is disconnected.
+
+      %1$s sensor name. E.g., 'Polar Bluetooth'.">
+   Disconnected from %1$s
+  </string>
 
     <!-- Settings Stats -->
     <string name="settings_stats_coordinate" translation_description="In the 'Stats settings, the option to show latitude and longitude.