Release: v4.0.7

Bumps appcompat from 1.4.2 to 1.5.0.

---
updated-dependencies:
- dependency-name: androidx.appcompat:appcompat
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/FUNDING.yml

@@ -2,4 +2,4 @@
 
 liberapay: OpenTracks
 github: [rgmf, pstorch, dennisguse]
-custom: [ https://liberapay.com/OpenTracks, https://play.google.com/store/apps/details?id=de.dennisguse.opentracks.playstore ]
+custom: https://play.google.com/store/apps/details?id=de.dennisguse.opentracks.playstore

.github/ISSUE_TEMPLATE/data_not_recorded.md

@@ -0,0 +1,24 @@
+---
+name: Data not recorded 
+about: Somehow OpenTracks did not record GPS data 
+title: ''
+labels: potential bug 
+assignees: ''
+
+---
+
+**Please describe the problem and how to reproduce it:**
+
+...
+
+**Checklist**
+
+- [ ] Consulted [https://dontkillmyapp.com/]
+- [ ] Power management: battery optimization is disabled for OpenTracks
+
+**Technical information**
+
+- Device: [e.g. Nexus 7 (2013)]
+- OS: [e.g. LineageOS 15.1]
+- OpenTracks version: [e.g. v3.2.4]
+- OpenTracks commit id (only for nightly builds): [e.g. 4b333bb]

.github/workflows/build_apk.yml

@@ -1,9 +1,10 @@
 #https://github.com/marketplace/actions/android-emulator-runner
-name: Build nightly
+name: Build APK
-on: [ push ]
+on:
+  push
 
 jobs:
-  nightly-build:
+  apk-build:
     runs-on: ubuntu-latest
     steps:
       - name: checkout
@@ -14,7 +15,7 @@ jobs:
           distribution: 'adopt'
           java-version: '11'
 
-      - name: Assemble nighlty APK
+      - name: Assemble APK
         shell: bash
         run: |
           echo ${NIGHTLY_STORE_FILE} | base64 -d > KEY_NIGHTLY.jks
@@ -28,7 +29,7 @@ jobs:
         if: always()
         uses: actions/upload-artifact@v3
         with:
-          name: OpenTracks-nightly.apk
+          name: OpenTracks-APK.apk
           path: ./build/outputs/apk/nightly/*.apk
           retention-days: 7
 

.github/workflows/lint.yml

@@ -2,7 +2,7 @@ name: Linting
 
 on:
   push:
-  pull_request_target:
+  pull_request:
 
 jobs:
   analyse:

.github/workflows/test.yml

@@ -2,7 +2,7 @@
 name: Test
 on:
   push:
-  pull_request_target:
+  pull_request:
 
 jobs:
   test:
@@ -23,7 +23,7 @@ jobs:
           java-version: '11'
 
       - name: run tests
-        uses: reactivecircus/android-emulator-runner@v2.24.0
+        uses: reactivecircus/android-emulator-runner@v2.25.0
         with:
           api-level: ${{ matrix.api-level }}
           target: ${{ matrix.target }}

README.md

@@ -95,7 +95,7 @@ OpenTracks can be used with [Gadgetbridge](https://www.gadgetbridge.org/):
 __Only required permission:__
 * _ACCESS_FINE_LOCATION_: required to use the GPS.
 
-### API
+### Public API
 
 OpenTracks includes an API for starting/stopping recording by another installed application (e.g., [Automate](https://llamalab.com/automate/), [Tasker](https://tasker.joaoapps.com), or [Easer](https://github.com/renyuneyun/Easer)).
 The API can be invoked by sending an explicit Intent to start an activity.
@@ -107,20 +107,37 @@ The API can be invoked by sending an explicit Intent to start an activity.
 * Nightly: `de.dennisguse.opentracks.nightly`
 
 `Class`:
+
 * **Start a recording:**  `de.dennisguse.opentracks.publicapi.StartRecording`
-* **Start a recording:**  `de.dennisguse.opentracks.publicapi.StopRecording`
+* **Stop a recording:**  `de.dennisguse.opentracks.publicapi.StopRecording`
 
 For testing via adb: `adb shell am start -n "package/class"`
 
-The Start/Stop API is disabled by default to protect the user's privacy, but it can easily be enabled in the settings.
+`StartRecording` supports the following parameters:
 
-## Custom Dashboards (incl. map)
+* Set track data: `TRACK_NAME`, `TRACK_CATEGORY`, and `TRACK_DESCRIPTION`
-As of v3.3.1, OpenTracks supports custom dashboards for displaying previously recorded and live tracks.
+* Send recorded data to another application via _Dashboard API_: `STATS_TARGET_PACKAGE`
+  and `STATS_TARGET_CLASS`
 
-The reference implementation is [OSMDashboard](https://github.com/OpenTracksApp/OSMDashboard), which presents an OpenStreetMap map (showing the current track, incl. updates). The Dashboard API is also used by [Gadgetbridge](https://codeberg.org/Freeyourgadget/Gadgetbridge/) for displaying live track statistics on supported wearables.
+The Public API is disabled by default to protect the user's privacy, but it can easily be enabled in
+the settings.
 
-Alternatively, recorded tracks can be shared as KMZ/GPX with installed applications (e.g., [OsmAnd](https://play.google.com/store/apps/details?id=net.osmand)).
+__IMPORTANT__: triggering `StartRecording` does not check if Android permissions (location or
-However, this is rather slow and does not provide updates while recording.
+Bluetooth) were granted. If they are not granted`
+
+## Dashboard API (incl. map)
+
+As of v3.3.1, OpenTracks supports custom dashboards for displaying previously recorded and live
+tracks.
+
+The reference implementation is [OSMDashboard](https://github.com/OpenTracksApp/OSMDashboard), which
+presents an OpenStreetMap map (showing the current track, incl. updates). The Dashboard API is also
+used by [Gadgetbridge](https://codeberg.org/Freeyourgadget/Gadgetbridge/) for displaying live track
+statistics on supported wearables.
+
+Alternatively, recorded tracks can be shared as KMZ/GPX with installed applications (
+e.g., [OsmAnd](https://play.google.com/store/apps/details?id=net.osmand)). However, this is rather
+slow and does not provide updates while recording.
 
 The developer documentation is in [README_API.md](README_API.md).
 

README_TESTED_SENSORS.md

@@ -38,10 +38,6 @@ However, often only one value is provided.
 
 We only support _Instantaneous Power_.
 
-_WARNING_: we only support physically movements with valid GPS coordinates.
-Using a device indoors (no GPS available) will only show the current power values, but won't store anything.
-Also the distance is not computed.
-
 For cycling:
 * Assioma Duo Powermeter
 * Elite drivo II

build.gradle

@@ -6,7 +6,7 @@ buildscript {
         mavenCentral()
     }
     dependencies {
-        classpath 'com.android.tools.build:gradle:7.2.1'
+        classpath 'com.android.tools.build:gradle:7.2.2'
     }
 }
 
@@ -51,7 +51,7 @@ android {
         targetCompatibility JavaVersion.VERSION_11
     }
 
-    compileSdkVersion 32
+    compileSdk 33
 
     buildFeatures {
         viewBinding true
@@ -59,13 +59,13 @@ android {
 
     defaultConfig {
         applicationId "de.dennisguse.opentracks"
-        versionCode 4926
+        versionCode 5004
-        versionName "v4.0.1"
+        versionName "v4.0.7"
 
         buildConfigField "String", "VERSION_NAME_FULL", "\"${getVersionName()}\""
 
-        minSdkVersion 21
+        minSdk 21
-        targetSdkVersion 32
+        targetSdk 33
 
         testInstrumentationRunner "de.dennisguse.opentracks.TestRunner"
         testInstrumentationRunnerArguments clearPackageData: 'true'
@@ -100,6 +100,7 @@ android {
         releasePlayStore {
             applicationIdSuffix ".playstore"
             versionNameSuffix "-PlayStore"
+            signingConfig signingConfigs.debug
         }
     }
 
@@ -117,9 +118,11 @@ android {
 }
 
 dependencies {
-    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.1.5'
+    coreLibraryDesugaring 'com.android.tools:desugar_jdk_libs:1.1.6'
 
-    implementation 'androidx.appcompat:appcompat:1.4.2'
+    implementation 'androidx.appcompat:appcompat:1.5.0'
+    implementation 'androidx.lifecycle:lifecycle-viewmodel:2.5.1'
+    implementation 'androidx.lifecycle:lifecycle-viewmodel-ktx:2.5.1'
     implementation 'androidx.preference:preference:1.2.0'
     implementation 'androidx.documentfile:documentfile:1.0.1'
     implementation 'com.google.android.material:material:1.6.1'
@@ -130,7 +133,7 @@ dependencies {
     androidTestImplementation 'androidx.test:rules:1.4.0'
     androidTestImplementation 'androidx.test:runner:1.4.0'
     androidTestImplementation 'androidx.test.espresso:espresso-core:3.4.0'
-    androidTestImplementation 'org.mockito:mockito-android:4.6.1'
+    androidTestImplementation 'org.mockito:mockito-android:4.7.0'
 
     androidTestUtil 'androidx.test:orchestrator:1.4.1'
 }

fastlane/metadata/android/en-US/changelogs/4938.txt

@@ -0,0 +1,10 @@
+v4.0.2: OpenTracks
+
+Changes:
+- Add nautical miles 
+- Settings can be reset while recording
+
+Bugfix:
+- Voice announcement rounding
+- Chart: elevation was weirdly smoothed
+- Export was not checking if file exists

fastlane/metadata/android/en-US/changelogs/4951.txt

@@ -0,0 +1,8 @@
+v4.0.3: OpenTracks
+
+Changes:
+- Max. speed as reported by sensor (GPS or BLE)
+
+Bugfix:
+- Prevent crash if OSM Dashboard is not installed
+- GPX track export: do not export empty track segments

fastlane/metadata/android/en-US/changelogs/4981.txt

@@ -0,0 +1,13 @@
+v4.0.4: OpenTracks
+
+Changes:
+- Store BLE sensor data even without distance (every 10s)
+- Public API: allows setting name, category, and description
+
+Bugfix:
+- Crash when taking a picture and rotating the phone
+- 
+
+Developer:
+- Target SDK 33
+- Barometer uses interval of 5s

fastlane/metadata/android/en-US/changelogs/4986.txt

@@ -0,0 +1,8 @@
+v4.0.5: OpenTracks
+
+Changes:
+- PlayStore relase get's another logo
+
+Bugfix:
+- Interval list shows "-" if gain/loss is not present
+

fastlane/metadata/android/en-US/changelogs/4993.txt

@@ -0,0 +1,6 @@
+v4.0.6: OpenTracks
+
+Bugfix:
+- EGM2008 offset computed wrong for negative longitudes
+- PublicAPI crashed if OpenTracks was in background (API26+)
+

fastlane/metadata/android/en-US/changelogs/5004.txt

@@ -0,0 +1,11 @@
+v4.0.7: OpenTracks
+
+Changes:
+- GPS signal lost timeout: 30s
+- Android13: request permission to show notifications
+- Faster deletion of tracks (vacuum database only if needed)
+
+Bugfix:
+- PublicAPI stop command resulted in crash (introduced in v4.0.6)
+- Permissions: request all permissions during on startup
+

fastlane/metadata/android/fr-FR/changelogs/4448.txt

@@ -0,0 +1,11 @@
+v3.20.2 : OpenTracks
+
+Changements :
+- Le gain et la perte d'altitude sont des entiers au lieu de floats
+- Demander la permission avant d'utiliser Bluetooth par un message Toast
+
+Correction d'un bug :
+- Définir FLAG_IMMUTABLE pour PendingIntents pour éviter un crash sur Android 12
+- Le capteur de cadence renvoie 0 au lieu de None lorsque l'utilisateur ne pédale pas.
+- Le capteur de vitesse renvoie 0 au lieu de la dernière vitesse connue quand c'est arrêté
+- Avec les capteurs, le temps de déplacement s'arrête lorsqu'il n'est pas en mouvement

fastlane/metadata/android/fr-FR/full_description.txt

@@ -7,5 +7,11 @@ Fonctionnalités :
 * Dénivelé positif et négatif: via capteur de pression barométrique
 * Synthèse vocale
 * Prise en charge des capteurs Bluetooth LE : rythme cardiaque, vitesse et distance (vélo), cadence de pédalage (vélo), et capteur de puissance (vélo)
-* Export : export des traces au format  KMZ (photos incluses), KML ou GPX
+* Export : export des traces au format KMZ (photos incluses), KML ou GPX
 * Pas d'accès internet requis : Internet n'est pas nécessaire pour le fonctionnement de l'application
+* Thème sombre ou claire, avec le respect des paramètres du système
+* Pas de publicités
+
+Logiciel Open Source
+Vous pouvez utiliser, étudier, changer et partager le code source.
+Licence Apache 2.0

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

@@ -3,48 +3,25 @@ package de.dennisguse.opentracks;
 
 import static androidx.test.espresso.Espresso.onData;
 import static androidx.test.espresso.Espresso.onView;
-import static androidx.test.espresso.Espresso.pressBack;
 import static androidx.test.espresso.action.ViewActions.click;
 import static androidx.test.espresso.action.ViewActions.longClick;
-import static androidx.test.espresso.action.ViewActions.scrollTo;
-import static androidx.test.espresso.assertion.ViewAssertions.matches;
 import static androidx.test.espresso.matcher.ViewMatchers.isDisplayed;
 import static androidx.test.espresso.matcher.ViewMatchers.withContentDescription;
 import static androidx.test.espresso.matcher.ViewMatchers.withId;
 import static androidx.test.espresso.matcher.ViewMatchers.withText;
 import static org.hamcrest.Matchers.allOf;
 import static org.hamcrest.Matchers.anything;
-import static de.dennisguse.opentracks.util.EspressoUtils.childAtPosition;
 import static de.dennisguse.opentracks.util.EspressoUtils.waitFor;
-import static de.dennisguse.opentracks.util.EspressoUtils.withListSize;
 
-import android.app.ActivityManager;
-import android.app.Instrumentation;
-import android.content.Context;
-import android.view.View;
-import android.widget.ListView;
-
-import androidx.test.espresso.IdlingRegistry;
-import androidx.test.espresso.IdlingResource;
-import androidx.test.espresso.ViewInteraction;
-import androidx.test.espresso.assertion.ViewAssertions;
 import androidx.test.ext.junit.rules.ActivityScenarioRule;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
 import androidx.test.filters.LargeTest;
-import androidx.test.platform.app.InstrumentationRegistry;
 import androidx.test.rule.GrantPermissionRule;
 
-import org.hamcrest.Description;
-import org.hamcrest.TypeSafeMatcher;
-import org.junit.After;
-import org.junit.Before;
-import org.junit.Ignore;
 import org.junit.Rule;
 import org.junit.Test;
 import org.junit.runner.RunWith;
 
-import de.dennisguse.opentracks.services.TrackDeleteService;
-
 @LargeTest
 @RunWith(AndroidJUnit4.class)
 public class EspressoDeleteTrackTest {

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

@@ -4,7 +4,6 @@ import static androidx.test.espresso.Espresso.onData;
 import static androidx.test.espresso.Espresso.onView;
 import static androidx.test.espresso.action.ViewActions.click;
 import static androidx.test.espresso.action.ViewActions.longClick;
-import static androidx.test.espresso.action.ViewActions.scrollTo;
 import static androidx.test.espresso.assertion.ViewAssertions.matches;
 import static androidx.test.espresso.matcher.ViewMatchers.isClickable;
 import static androidx.test.espresso.matcher.ViewMatchers.isDisplayed;

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

@@ -27,7 +27,7 @@ public class ChartPointTest {
         statistics.setTotalTime(Duration.ofSeconds(1000));
 
         // when
-        ChartPoint point = new ChartPoint(statistics, TrackStubUtils.createDefaultTrackPoint(), Speed.of(0), Altitude.EGM2008.of(0), false, UnitSystem.IMPERIAL);
+        ChartPoint point = new ChartPoint(statistics, TrackStubUtils.createDefaultTrackPoint(), Speed.of(0), false, UnitSystem.IMPERIAL);
 
         // then
         assertEquals(1000000, (long) point.getTimeOrDistance());
@@ -40,7 +40,7 @@ public class ChartPointTest {
         statistics.setTotalDistance(Distance.of(1000));
 
         // when
-        ChartPoint point = new ChartPoint(statistics, TrackStubUtils.createDefaultTrackPoint(), Speed.of(0), Altitude.EGM2008.of(0), true, UnitSystem.METRIC);
+        ChartPoint point = new ChartPoint(statistics, TrackStubUtils.createDefaultTrackPoint(), Speed.of(0), true, UnitSystem.METRIC);
 
         // then
         assertEquals(1, (long) point.getTimeOrDistance());
@@ -50,9 +50,11 @@ public class ChartPointTest {
     public void create_get_altitude_speed_and_pace() {
         // given
         TrackStatistics statistics = new TrackStatistics();
+        TrackPoint trackPoint = TrackStubUtils.createDefaultTrackPoint()
+                .setAltitude(Altitude.EGM2008.of(50));
 
         // when
-        ChartPoint point = new ChartPoint(statistics, TrackStubUtils.createDefaultTrackPoint(), Speed.of(10), Altitude.EGM2008.of(50), false, UnitSystem.METRIC);
+        ChartPoint point = new ChartPoint(statistics, trackPoint, Speed.of(10), false, UnitSystem.METRIC);
 
         // then
         assertEquals(50, point.getAltitude(), 0.01);
@@ -64,9 +66,10 @@ public class ChartPointTest {
     public void create_sensorNotAvailable() {
         // given
         TrackStatistics statistics = new TrackStatistics();
-
+        TrackPoint trackPoint = TrackStubUtils.createDefaultTrackPoint()
+                .setAltitude(Altitude.EGM2008.of(50));
         // when
-        ChartPoint point = new ChartPoint(statistics, TrackStubUtils.createDefaultTrackPoint(), Speed.of(10), Altitude.EGM2008.of(50), false, UnitSystem.METRIC);
+        ChartPoint point = new ChartPoint(statistics, trackPoint, Speed.of(10), false, UnitSystem.METRIC);
 
         // then
         assertNull(point.getHeartRate());
@@ -77,15 +80,16 @@ public class ChartPointTest {
     @Test
     public void create_sensorAvailable() {
         // given
-        TrackPoint trackPoint = TrackStubUtils.createDefaultTrackPoint();
+        TrackPoint trackPoint = TrackStubUtils.createDefaultTrackPoint()
-        trackPoint.setHeartRate(100f);
+                .setAltitude(Altitude.EGM2008.of(50))
-        trackPoint.setCadence(101f);
+                .setHeartRate(100f)
-        trackPoint.setPower(102f);
+                .setCadence(101f)
+                .setPower(102f);
 
         TrackStatistics statistics = new TrackStatistics();
 
         // when
-        ChartPoint point = new ChartPoint(statistics, trackPoint, Speed.of(10), Altitude.EGM2008.of(50), false, UnitSystem.METRIC);
+        ChartPoint point = new ChartPoint(statistics, trackPoint, Speed.of(10), false, UnitSystem.METRIC);
 
         // then
         assertEquals(100.0, point.getHeartRate(), 0.01);

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

@@ -15,6 +15,10 @@
  */
 package de.dennisguse.opentracks.chart;
 
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertFalse;
+import static org.junit.Assert.assertTrue;
+
 import androidx.annotation.NonNull;
 import androidx.test.core.app.ApplicationProvider;
 import androidx.test.ext.junit.runners.AndroidJUnit4;
@@ -25,10 +29,6 @@ import org.junit.runner.RunWith;
 
 import de.dennisguse.opentracks.R;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertFalse;
-import static org.junit.Assert.assertTrue;
-
 /**
  * Tests {@link ChartValueSeries}.
  *
@@ -47,6 +47,7 @@ public class ChartValueSeriesTest {
                 new int[]{1, 100, 1000},
                 R.string.description_altitude_metric,
                 R.string.description_altitude_imperial,
+                R.string.description_altitude_imperial,
                 R.color.chart_altitude_fill,
                 R.color.chart_altitude_border,
                 15,

src/androidTest/java/de/dennisguse/opentracks/data/ShareContentProviderTest.java

@@ -7,7 +7,6 @@ import android.util.Pair;
 
 import org.junit.Test;
 
-import java.util.HashSet;
 import java.util.Set;
 
 import de.dennisguse.opentracks.data.models.Track;
@@ -24,10 +23,7 @@ public class ShareContentProviderTest {
 
     @Test
     public void testCreateAndParseURI_valid() {
-        Set<Track.Id> trackIds = new HashSet<>();
+        Set<Track.Id> trackIds = Set.of(new Track.Id(1), new Track.Id(3), new Track.Id(5));
-        trackIds.add(new Track.Id(1));
-        trackIds.add(new Track.Id(3));
-        trackIds.add(new Track.Id(5));
 
         Pair<Uri, String> shareURIandMIME = ShareContentProvider.createURI(trackIds, "filename.suffix", TrackFileFormat.KML_WITH_TRACKDETAIL_AND_SENSORDATA);
 
@@ -36,9 +32,7 @@ public class ShareContentProviderTest {
 
     @Test
     public void testCreateURIescapeFilename() {
-        Set<Track.Id> trackIds = new HashSet<>();
+        Pair<Uri, String> shareURIandMIME = ShareContentProvider.createURI(Set.of(new Track.Id(1)), "../../&1=1", TrackFileFormat.KML_WITH_TRACKDETAIL_AND_SENSORDATA);
-        trackIds.add(new Track.Id(1));
-        Pair<Uri, String> shareURIandMIME = ShareContentProvider.createURI(trackIds, "../../&1=1", TrackFileFormat.KML_WITH_TRACKDETAIL_AND_SENSORDATA);
 
         assertEquals(Uri.parse("content://de.dennisguse.opentracks.debug.content/tracks/KML_WITH_TRACKDETAIL_AND_SENSORDATA/1/..%2F..%2F%261%3D1"), shareURIandMIME.first);
     }

src/androidTest/java/de/dennisguse/opentracks/data/models/DistanceFormatterTest.java

@@ -12,6 +12,7 @@ import org.junit.runner.RunWith;
 
 import de.dennisguse.opentracks.settings.UnitSystem;
 
+//TODO Parametrized tests
 @RunWith(AndroidJUnit4.class)
 public class DistanceFormatterTest {
 
@@ -42,4 +43,17 @@ public class DistanceFormatterTest {
         // A small number in imperial
         assertEquals("328.08 ft", formatter.formatDistance(Distance.of(100)));
     }
+
+    @Test
+    public void testFormatDistance_nautical() {
+        DistanceFormatter formatter = DistanceFormatter.Builder()
+                .setDecimalCount(2)
+                .setUnit(UnitSystem.NAUTICAL_IMPERIAL)
+                .build(context);
+
+        // A large number in nautical
+        assertEquals("2.70 NM", formatter.formatDistance(Distance.of(5000)));
+        // A small number in nautical
+        assertEquals("328.08 ft", formatter.formatDistance(Distance.of(100)));
+    }
 }

src/androidTest/java/de/dennisguse/opentracks/data/models/SpeedFormatterTest.java

@@ -12,6 +12,7 @@ import org.junit.runner.RunWith;
 
 import de.dennisguse.opentracks.settings.UnitSystem;
 
+//TODO Use make parametrized tests?
 @RunWith(AndroidJUnit4.class)
 public class SpeedFormatterTest {
 
@@ -39,12 +40,22 @@ public class SpeedFormatterTest {
                 .setReportSpeedOrPace(false)
                 .build(context);
 
-//        assertEquals("TODO", formatter.getSpeedParts(Speed.of(3.34)).first);
+        assertEquals("8:02", formatter.getSpeedParts(Speed.of(3.34)).first);
-//        assertEquals("TODO", formatter.getSpeedParts(Speed.of(3.33)).first);
-
         assertEquals("min/mi", formatter.getSpeedParts(Speed.zero()).second);
     }
 
+    @Test
+    public void testGetSpeedParts_pace_nautical() {
+        SpeedFormatter formatter = SpeedFormatter.Builder()
+                .setDecimalCount(2)
+                .setUnit(UnitSystem.NAUTICAL_IMPERIAL)
+                .setReportSpeedOrPace(false)
+                .build(context);
+
+        assertEquals("9:14", formatter.getSpeedParts(Speed.of(3.34)).first);
+        assertEquals("min/NM", formatter.getSpeedParts(Speed.zero()).second);
+    }
+
     @Test
     public void testGetSpeedParts_speed_metric() {
         SpeedFormatter formatter = SpeedFormatter.Builder()
@@ -69,6 +80,18 @@ public class SpeedFormatterTest {
         assertEquals("mph", formatter.getSpeedParts(Speed.zero()).second);
     }
 
+    @Test
+    public void testGetSpeedParts_speed_nautical() {
+        SpeedFormatter formatter = SpeedFormatter.Builder()
+                .setDecimalCount(2)
+                .setUnit(UnitSystem.NAUTICAL_IMPERIAL)
+                .setReportSpeedOrPace(true)
+                .build(context);
+
+        assertEquals("6.5", formatter.getSpeedParts(Speed.of(3.34)).first);
+        assertEquals("kn", formatter.getSpeedParts(Speed.zero()).second);
+    }
+
     @Test
     public void testFormatSpeed() {
         SpeedFormatter formatter = SpeedFormatter.Builder()

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

@@ -155,26 +155,31 @@ public class ExportImportTest {
         mockAltitudeChange(trackPointCreator, 1);
         mockBLESensorData(trackPointCreator, 15f, sensorDistance, 66f, 3f, 50f);
 
-        trackPointCreator.setClock("2020-02-02T02:02:05Z");
+        trackPointCreator.setClock("2020-02-02T02:02:14Z");
+        mockBLESensorData(trackPointCreator, 15f, null, 66f, 3f, 50f);
+        trackPointCreator.setClock("2020-02-02T02:02:15Z");
+        mockBLESensorData(trackPointCreator, null, null, 66f, 3f, 50f);
+
+        trackPointCreator.setClock("2020-02-02T02:02:16Z");
         mockBLESensorData(trackPointCreator, 5f, Distance.of(2), 66f, 3f, 50f); // Distance will be added to next TrackPoint
 
-        sendLocation(trackPointCreator, "2020-02-02T02:02:05Z", 3, 14.001, 10, 13, 15, 10, 0);
+        sendLocation(trackPointCreator, "2020-02-02T02:02:17Z", 3, 14.001, 10, 13, 15, 10, 0);
         service.insertMarker("Marker 2", "Marker 2 category", "Marker 2 desc", null);
 
-        trackPointCreator.setClock("2020-02-02T02:02:06Z");
+        trackPointCreator.setClock("2020-02-02T02:02:18Z");
         trackPointCreator.setRemoteSensorManager(new BluetoothRemoteSensorManager(context, null, trackPointCreator));
         service.endCurrentTrack();
 
-        trackPointCreator.setClock("2020-02-02T02:02:20Z");
+        trackPointCreator.setClock("2020-02-02T02:03:20Z");
         service.resumeTrack(trackId);
 
-        sendLocation(trackPointCreator, "2020-02-02T02:02:21Z", 3, 14.002, 10, 13, 15, 10, 0);
+        sendLocation(trackPointCreator, "2020-02-02T02:03:21Z", 3, 14.002, 10, 13, 15, 10, 0);
 
-        sendLocation(trackPointCreator, "2020-02-02T02:02:22Z", 3, 16, 10, 13, 15, 10, 0);
+        sendLocation(trackPointCreator, "2020-02-02T02:03:22Z", 3, 16, 10, 13, 15, 10, 0);
 
-        sendLocation(trackPointCreator, "2020-02-02T02:02:23Z", 3, 16.001, 10, 27, 15, 10, 0);
+        sendLocation(trackPointCreator, "2020-02-02T02:03:23Z", 3, 16.001, 10, 27, 15, 10, 0);
 
-        trackPointCreator.setClock("2020-02-02T02:02:24Z");
+        trackPointCreator.setClock("2020-02-02T02:03:24Z");
         trackPointCreator.setRemoteSensorManager(new BluetoothRemoteSensorManager(context, null, trackPointCreator));
         service.endCurrentTrack();
 
@@ -187,7 +192,7 @@ public class ExportImportTest {
         track = contentProviderUtils.getTrack(trackId);
         trackPoints = TestDataUtil.getTrackPoints(contentProviderUtils, trackId);
         markers = contentProviderUtils.getMarkers(trackId);
-        assertEquals(10, trackPoints.size());
+        assertEquals(12, trackPoints.size());
         assertEquals(2, markers.size());
     }
 
@@ -231,29 +236,29 @@ public class ExportImportTest {
         // Time
         assertEquals(track.getZoneOffset(), importedTrack.getZoneOffset());
         assertEquals(Instant.parse("2020-02-02T02:02:02Z"), importedTrackStatistics.getStartTime());
-        assertEquals(Instant.parse("2020-02-02T02:02:24Z"), importedTrackStatistics.getStopTime());
+        assertEquals(Instant.parse("2020-02-02T02:03:24Z"), importedTrackStatistics.getStopTime());
 
         TrackStatistics originalTrackStatistics = track.getTrackStatistics();
 
         assertEquals(originalTrackStatistics.getTotalTime(), importedTrackStatistics.getTotalTime());
-        assertEquals(Duration.ofSeconds(7), importedTrackStatistics.getTotalTime());
+        assertEquals(Duration.ofSeconds(19), importedTrackStatistics.getTotalTime());
 
         assertEquals(originalTrackStatistics.getMovingTime(), importedTrackStatistics.getMovingTime());
         assertEquals(Duration.ofSeconds(3), importedTrackStatistics.getMovingTime());
 
         // Distance
         assertEquals(originalTrackStatistics.getTotalDistance(), importedTrackStatistics.getTotalDistance());
-        assertEquals(123.16, importedTrackStatistics.getTotalDistance().toM(), 0.01);
+        assertEquals(125.16, importedTrackStatistics.getTotalDistance().toM(), 0.01);
 
         // Speed
         assertEquals(originalTrackStatistics.getMaxSpeed(), importedTrackStatistics.getMaxSpeed());
-        assertEquals(41.05, importedTrackStatistics.getMaxSpeed().toMPS(), 0.01);
+        assertEquals(41.72, importedTrackStatistics.getMaxSpeed().toMPS(), 0.01);
 
         assertEquals(originalTrackStatistics.getAverageSpeed(), importedTrackStatistics.getAverageSpeed());
-        assertEquals(17.59, importedTrackStatistics.getAverageSpeed().toMPS(), 0.01);
+        assertEquals(6.58, importedTrackStatistics.getAverageSpeed().toMPS(), 0.01);
 
         assertEquals(originalTrackStatistics.getAverageMovingSpeed(), importedTrackStatistics.getAverageMovingSpeed());
-        assertEquals(41.05, importedTrackStatistics.getMaxSpeed().toMPS(), 0.01);
+        assertEquals(41.72, importedTrackStatistics.getMaxSpeed().toMPS(), 0.01);
 
         // Altitude
         assertEquals(originalTrackStatistics.getMinAltitude(), importedTrackStatistics.getMinAltitude(), 0.01);
@@ -345,19 +350,19 @@ public class ExportImportTest {
                         .setAltitudeLoss(1f)
                         .setAltitudeGain(1f)
                         .setHorizontalAccuracy(Distance.of(10)),
-                new TrackPoint(TrackPoint.Type.TRACKPOINT, Instant.parse("2020-02-02T02:02:05Z"))
+                new TrackPoint(TrackPoint.Type.TRACKPOINT, Instant.parse("2020-02-02T02:02:17Z"))
                         .setLatitude(3)
                         .setLongitude(14.001)
                         .setAltitude(10)
                         .setSpeed(Speed.of(5))
                         .setAltitudeLoss(1f)
                         .setAltitudeGain(1f)
-                        .setSensorDistance(Distance.of(12))
+                        .setSensorDistance(Distance.of(14))
                         .setHeartRate(66f)
                         .setPower(50f)
                         .setCadence(3f)
                         .setHorizontalAccuracy(Distance.of(10)),
-                new TrackPoint(TrackPoint.Type.SEGMENT_START_AUTOMATIC, Instant.parse("2020-02-02T02:02:21Z"))
+                new TrackPoint(TrackPoint.Type.SEGMENT_START_AUTOMATIC, Instant.parse("2020-02-02T02:03:21Z"))
                         .setLatitude(3)
                         .setLongitude(14.002)
                         .setAltitude(10)
@@ -365,7 +370,7 @@ public class ExportImportTest {
                         .setAltitudeGain(0f)
                         .setSpeed(Speed.of(15))
                         .setHorizontalAccuracy(Distance.of(10)),
-                new TrackPoint(TrackPoint.Type.SEGMENT_START_AUTOMATIC, Instant.parse("2020-02-02T02:02:22Z"))
+                new TrackPoint(TrackPoint.Type.SEGMENT_START_AUTOMATIC, Instant.parse("2020-02-02T02:03:22Z"))
                         .setLatitude(3)
                         .setLongitude(16)
                         .setAltitude(10)
@@ -373,7 +378,7 @@ public class ExportImportTest {
                         .setAltitudeGain(0f)
                         .setSpeed(Speed.of(15))
                         .setHorizontalAccuracy(Distance.of(10)),
-                new TrackPoint(TrackPoint.Type.TRACKPOINT, Instant.parse("2020-02-02T02:02:23Z"))
+                new TrackPoint(TrackPoint.Type.TRACKPOINT, Instant.parse("2020-02-02T02:03:23Z"))
                         .setLatitude(3)
                         .setLongitude(16.001)
                         .setAltitude(10)
@@ -390,18 +395,18 @@ public class ExportImportTest {
         // Time
         assertEquals(track.getZoneOffset(), importedTrack.getZoneOffset());
         assertEquals(Instant.parse("2020-02-02T02:02:03Z"), importedTrackStatistics.getStartTime());
-        assertEquals(Instant.parse("2020-02-02T02:02:23Z"), importedTrackStatistics.getStopTime());
+        assertEquals(Instant.parse("2020-02-02T02:03:23Z"), importedTrackStatistics.getStopTime());
 
-        assertEquals(Duration.ofSeconds(3), importedTrackStatistics.getTotalTime());
+        assertEquals(Duration.ofSeconds(15), importedTrackStatistics.getTotalTime());
-        assertEquals(Duration.ofSeconds(3), importedTrackStatistics.getMovingTime());
+        assertEquals(Duration.ofSeconds(15), importedTrackStatistics.getMovingTime());
 
         // Distance
-        assertEquals(123.16, importedTrackStatistics.getTotalDistance().toM(), 0.01);
+        assertEquals(125.16, importedTrackStatistics.getTotalDistance().toM(), 0.01);
 
         // Speed
-        assertEquals(41.05, importedTrackStatistics.getMaxSpeed().toMPS(), 0.01);
+        assertEquals(8.34, importedTrackStatistics.getMaxSpeed().toMPS(), 0.01);
-        assertEquals(41.05, importedTrackStatistics.getAverageSpeed().toMPS(), 0.01);
+        assertEquals(8.34, importedTrackStatistics.getAverageSpeed().toMPS(), 0.01);
-        assertEquals(41.05, importedTrackStatistics.getAverageMovingSpeed().toMPS(), 0.01);
+        assertEquals(8.34, importedTrackStatistics.getAverageMovingSpeed().toMPS(), 0.01);
 
         // Altitude
         assertEquals(10, importedTrackStatistics.getMinAltitude(), 0.01);

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

@@ -15,11 +15,16 @@ import org.junit.Test;
 import org.junit.runner.RunWith;
 import org.junit.runners.JUnit4;
 
+import java.io.BufferedReader;
+import java.io.ByteArrayOutputStream;
 import java.io.IOException;
 import java.io.InputStream;
+import java.io.InputStreamReader;
+import java.nio.charset.StandardCharsets;
 import java.time.Duration;
 import java.time.Instant;
 import java.util.List;
+import java.util.stream.Collectors;
 
 import de.dennisguse.opentracks.content.data.TestDataUtil;
 import de.dennisguse.opentracks.data.ContentProviderUtils;
@@ -27,6 +32,8 @@ import de.dennisguse.opentracks.data.models.Distance;
 import de.dennisguse.opentracks.data.models.Speed;
 import de.dennisguse.opentracks.data.models.Track;
 import de.dennisguse.opentracks.data.models.TrackPoint;
+import de.dennisguse.opentracks.io.file.TrackFileFormat;
+import de.dennisguse.opentracks.io.file.exporter.TrackExporter;
 import de.dennisguse.opentracks.stats.TrackStatistics;
 
 /**
@@ -181,7 +188,7 @@ public class GPXTrackImporterTest {
 
         // 3. trackstatistics
         TrackStatistics trackStatistics = importedTrack.getTrackStatistics();
-        assertEquals(4, trackStatistics.getMaxSpeed().toMPS(), 0.01);
+        assertEquals(4.0, trackStatistics.getMaxSpeed().toMPS(), 0.01);
         assertEquals(Duration.ofSeconds(101), trackStatistics.getMovingTime());
 
         // 4. trackpoints
@@ -208,4 +215,31 @@ public class GPXTrackImporterTest {
                         .setSpeed(Speed.of(3))
         ), importedTrackPoints);
     }
+
+    @LargeTest
+    @Test
+    public void importExportTest_timezone() throws IOException {
+        // given
+        XMLImporter importer = new XMLImporter(new GpxTrackImporter(context, trackImporter));
+        InputStream inputStream = InstrumentationRegistry.getInstrumentation().getContext().getResources().openRawResource(de.dennisguse.opentracks.debug.test.R.raw.gpx_timezone);
+        InputStream inputStreamExpected = InstrumentationRegistry.getInstrumentation().getContext().getResources().openRawResource(de.dennisguse.opentracks.debug.test.R.raw.gpx_timezone);
+
+        ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
+
+        // when
+        // 1. import
+        importTrackId = importer.importFile(inputStream).get(0);
+        Track importedTrack = contentProviderUtils.getTrack(importTrackId);
+
+        TrackExporter trackExporter = TrackFileFormat.GPX.createTrackExporter(context);
+        trackExporter.writeTrack(importedTrack, outputStream);
+
+        // then
+        String expected = new BufferedReader(
+                new InputStreamReader(inputStreamExpected, StandardCharsets.UTF_8))
+                .lines()
+                .collect(Collectors.joining("\n")) + "\n";
+
+        assertEquals(expected, outputStream.toString()); //TODO inputStream.readAllBytes() ?
+    }
 }

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

@@ -31,12 +31,14 @@ import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.content.data.TestDataUtil;
 import de.dennisguse.opentracks.data.ContentProviderUtils;
 import de.dennisguse.opentracks.data.models.Distance;
+import de.dennisguse.opentracks.data.models.HeartRate;
 import de.dennisguse.opentracks.data.models.Speed;
 import de.dennisguse.opentracks.data.models.Track;
 import de.dennisguse.opentracks.data.models.TrackPoint;
 import de.dennisguse.opentracks.io.file.importer.TrackPointAssert;
 import de.dennisguse.opentracks.sensors.AltitudeSumManager;
 import de.dennisguse.opentracks.sensors.BluetoothRemoteSensorManager;
+import de.dennisguse.opentracks.sensors.sensorData.SensorDataHeartRate;
 import de.dennisguse.opentracks.sensors.sensorData.SensorDataRunning;
 import de.dennisguse.opentracks.services.handlers.TrackPointCreator;
 import de.dennisguse.opentracks.settings.PreferencesUtils;
@@ -257,6 +259,47 @@ public class TrackRecordingServiceTestRecording {
         ), TestDataUtil.getTrackPoints(contentProviderUtils, trackId));
     }
 
+    @MediumTest
+    @Test
+    public void testRecording_blesensor_only_no_distance() {
+        // given
+        String startTime = "2020-02-02T02:02:02Z";
+        TrackPointCreator trackPointCreator = service.getTrackPointCreator();
+
+        trackPointCreator.setClock(startTime);
+        Track.Id trackId = service.startNewTrack();
+        trackPointCreator.stopGPS();
+        trackPointCreator.setAltitudeSumManager(altitudeSumManager);
+        BluetoothRemoteSensorManager remoteSensorManager = trackPointCreator.getRemoteSensorManager();
+
+        // when
+        String sensor1 = "2020-02-02T02:02:03Z";
+        trackPointCreator.setClock(sensor1);
+        remoteSensorManager.onChanged(new SensorDataHeartRate("", "", HeartRate.of(5))); //Should be ignored
+
+        String sensor3 = "2020-02-02T02:02:13Z";
+        trackPointCreator.setClock(sensor3);
+        remoteSensorManager.onChanged(new SensorDataHeartRate("", "", HeartRate.of(7)));
+
+        String stopTime = "2020-02-02T02:02:15Z";
+        trackPointCreator.setClock(stopTime);
+        service.endCurrentTrack();
+
+        // then
+        new TrackPointAssert().assertEquals(List.of(
+                new TrackPoint(TrackPoint.Type.SEGMENT_START_MANUAL, Instant.parse(startTime)),
+                new TrackPoint(TrackPoint.Type.SENSORPOINT, Instant.parse(sensor3))
+                        .setAltitudeGain(0f)
+                        .setAltitudeLoss(0f)
+                        .setHeartRate(HeartRate.of(7)),
+                new TrackPoint(TrackPoint.Type.SEGMENT_END_MANUAL, Instant.parse(stopTime))
+                        .setAltitudeGain(0f)
+                        .setAltitudeLoss(0f)
+                        .setHeartRate(HeartRate.of(7))
+        ), TestDataUtil.getTrackPoints(contentProviderUtils, trackId));
+    }
+
+
     @MediumTest
     @Test
     public void testRecording_gpsOnly_recordingDistance_above() {

src/androidTest/java/de/dennisguse/opentracks/services/announcement/VoiceAnnouncementUtilsTest.java

@@ -67,6 +67,54 @@ public class VoiceAnnouncementUtilsTest {
         assertEquals("Total distance 20.00 kilometers. 1 hour 5 minutes 10 seconds. Speed 18.4 kilometers per hour.", announcement);
     }
 
+    @Test
+    public void getAnnouncement_metric_speed_rounding_check() {
+        TrackStatistics stats = new TrackStatistics();
+        stats.setTotalDistance(Distance.of(20000));
+        stats.setTotalTime(Duration.ofHours(1).plusMinutes(5).plusSeconds(10));
+        stats.setMovingTime(Duration.ofHours(1).plusSeconds(1));
+        stats.setMaxSpeed(Speed.of(100));
+        stats.setTotalAltitudeGain(6000f);
+
+        // when
+        String announcement = VoiceAnnouncementUtils.getAnnouncement(context, stats, UnitSystem.METRIC, true, null, null).toString();
+
+        // then
+        assertEquals("Total distance 20.00 kilometers. 1 hour 1 second. Speed 20.0 kilometers per hour.", announcement);
+    }
+
+    @Test
+    public void getAnnouncement_metric_distance_rounding_check() {
+        TrackStatistics stats = new TrackStatistics();
+        stats.setTotalDistance(Distance.of(19999));
+        stats.setTotalTime(Duration.ofHours(1).plusMinutes(5).plusSeconds(10));
+        stats.setMovingTime(Duration.ofHours(1));
+        stats.setMaxSpeed(Speed.of(100));
+        stats.setTotalAltitudeGain(6000f);
+
+        // when
+        String announcement = VoiceAnnouncementUtils.getAnnouncement(context, stats, UnitSystem.METRIC, true, null, null).toString();
+
+        // then
+        assertEquals("Total distance 20.00 kilometers. 1 hour. Speed 20.0 kilometers per hour.", announcement);
+    }
+
+    @Test
+    public void getAnnouncement_metric_distance_rounding_check_two() {
+        TrackStatistics stats = new TrackStatistics();
+        stats.setTotalDistance(Distance.of(19990));
+        stats.setTotalTime(Duration.ofHours(1).plusMinutes(5).plusSeconds(10));
+        stats.setMovingTime(Duration.ofHours(1));
+        stats.setMaxSpeed(Speed.of(100));
+        stats.setTotalAltitudeGain(6000f);
+
+        // when
+        String announcement = VoiceAnnouncementUtils.getAnnouncement(context, stats, UnitSystem.METRIC, true, null, null).toString();
+
+        // then
+        assertEquals("Total distance 19.99 kilometers. 1 hour. Speed 20.0 kilometers per hour.", announcement);
+    }
+
     @Test
     public void getAnnouncement_withInterval_metric_speed() {
         // given

src/androidTest/java/de/dennisguse/opentracks/stats/TrackStatisticsUpdaterTest.java

@@ -11,6 +11,7 @@ import org.junit.runner.RunWith;
 
 import java.time.Duration;
 import java.time.Instant;
+import java.util.List;
 
 import de.dennisguse.opentracks.content.data.TestDataUtil;
 import de.dennisguse.opentracks.data.models.Altitude;
@@ -86,7 +87,7 @@ public class TrackStatisticsUpdaterTest {
         assertEquals(Duration.ofSeconds(9), statistics.getMovingTime());
 
         assertEquals(2.5, statistics.getMinAltitude(), 0.01);
-        assertEquals(28.75, statistics.getMaxAltitude(), 0.01);
+        assertEquals(32.5, statistics.getMaxAltitude(), 0.01);
         assertEquals(36, statistics.getTotalAltitudeGain(), 0.01);
         assertEquals(36, statistics.getTotalAltitudeLoss(), 0.01);
 
@@ -245,6 +246,70 @@ public class TrackStatisticsUpdaterTest {
     public void addTrackPoint_speed_from_GPS_moving_and_sensor_speed() {
     }
 
+    @Test
+    public void addTrackPoint_maxSpeed_ignore_above_acceleration() {
+        TrackStatisticsUpdater subject = new TrackStatisticsUpdater();
+        assertEquals(Speed.of(0f), subject.getTrackStatistics().getMaxSpeed());
+
+        subject.addTrackPoint(new TrackPoint(TrackPoint.Type.SEGMENT_START_MANUAL, Instant.ofEpochSecond(0)));
+        assertEquals(Speed.of(0f), subject.getTrackStatistics().getMaxSpeed());
+
+        // Ignore as we set max speed if two consecutive trackpoints were considered moving
+        subject.addTrackPoint(new TrackPoint(0, 0, Altitude.WGS84.of(0), Instant.ofEpochSecond(1))
+                .setSpeed(Speed.of(1f)));
+        assertEquals(Speed.of(0f), subject.getTrackStatistics().getMaxSpeed());
+
+        // Update max speed
+        subject.addTrackPoint(new TrackPoint(0, 0, Altitude.WGS84.of(0), Instant.ofEpochSecond(2))
+                .setSpeed(Speed.of(1f)));
+        assertEquals(Speed.of(1f), subject.getTrackStatistics().getMaxSpeed());
+
+        // Update max speed
+        subject.addTrackPoint(new TrackPoint(0, 0, Altitude.WGS84.of(0), Instant.ofEpochSecond(12))
+                .setSpeed(Speed.of(50f)));
+        assertEquals(Speed.of(50f), subject.getTrackStatistics().getMaxSpeed());
+
+        // Ignore; we were getting slower
+        subject.addTrackPoint(new TrackPoint(0, 0, Altitude.WGS84.of(0), Instant.ofEpochSecond(13))
+                .setSpeed(Speed.of(5f)));
+        assertEquals(Speed.of(50f), subject.getTrackStatistics().getMaxSpeed());
+
+        // Ignore acceleration above 2g
+        subject.addTrackPoint(new TrackPoint(0, 0, Altitude.WGS84.of(0), Instant.ofEpochSecond(14))
+                .setSpeed(Speed.of(500f)));
+        assertEquals(Speed.of(50f), subject.getTrackStatistics().getMaxSpeed());
+
+    }
+
+    @Test
+    public void addTrackPoint_maxSpeed_multiple_segments() {
+        TrackStatisticsUpdater subject = new TrackStatisticsUpdater();
+        assertEquals(Speed.of(0f), subject.getTrackStatistics().getMaxSpeed());
+
+        subject.addTrackPoints(List.of(
+                new TrackPoint(TrackPoint.Type.SEGMENT_START_MANUAL, Instant.ofEpochSecond(0)),
+                new TrackPoint(0, 0, Altitude.WGS84.of(0), Instant.ofEpochSecond(1))
+                        .setSpeed(Speed.of(2f)),
+                new TrackPoint(0, 0, Altitude.WGS84.of(0), Instant.ofEpochSecond(2))
+                        .setSpeed(Speed.of(2f)),
+                new TrackPoint(TrackPoint.Type.SEGMENT_END_MANUAL, Instant.ofEpochSecond(4))
+        ));
+        assertEquals(Speed.of(2f), subject.getTrackStatistics().getMaxSpeed());
+
+        // when
+        subject.addTrackPoints(List.of(
+                new TrackPoint(TrackPoint.Type.SEGMENT_START_MANUAL, Instant.ofEpochSecond(5)),
+                new TrackPoint(0, 0, Altitude.WGS84.of(0), Instant.ofEpochSecond(6))
+                        .setSpeed(Speed.of(1f)),
+                new TrackPoint(0, 0, Altitude.WGS84.of(0), Instant.ofEpochSecond(7))
+                        .setSpeed(Speed.of(1f)),
+                new TrackPoint(TrackPoint.Type.SEGMENT_END_MANUAL, Instant.ofEpochSecond(8))
+        ));
+
+        // then
+        assertEquals(Speed.of(2f), subject.getTrackStatistics().getMaxSpeed());
+    }
+
     @Test
     public void copy_constructor() {
         // given

src/androidTest/java/de/dennisguse/opentracks/util/EGM2008UtilsTest.java

@@ -142,7 +142,7 @@ public class EGM2008UtilsTest {
     }
 
     @Test
-    public void data_Berlin() throws IOException {
+    public void data_Berlin_Germany_() throws IOException {
         // given
         TrackPoint trackPoint = new TrackPoint(TrackPoint.Type.TRACKPOINT, Instant.ofEpochMilli(0));
         trackPoint.setLatitude(52.530644);
@@ -157,7 +157,7 @@ public class EGM2008UtilsTest {
     }
 
     @Test
-    public void data_Berlin_Caching() throws IOException {
+    public void data_Berlin_Germany_Caching() throws IOException {
         // given
         TrackPoint trackPoint1 = new TrackPoint(TrackPoint.Type.TRACKPOINT, Instant.ofEpochMilli(0));
         trackPoint1.setLatitude(52.530644);
@@ -176,6 +176,22 @@ public class EGM2008UtilsTest {
         assertNotEquals(altitude_egm2008.correctAltitude(trackPoint1.getLocation()), altitude_egm2008.correctAltitude(trackPoint2.getLocation()), 0.0001);
     }
 
+    @Test
+    public void data_Seattle_USA() throws IOException {
+        // given
+        TrackPoint trackPoint = new TrackPoint(TrackPoint.Type.TRACKPOINT, Instant.ofEpochMilli(0));
+
+        trackPoint.setLatitude(47.63153);
+        trackPoint.setLongitude(-122.30938);
+        trackPoint.setAltitude(0);
+
+        // when
+        EGM2008Utils.EGM2008Correction altitude_egm2008 = EGM2008Utils.createCorrection(context, trackPoint.getLocation());
+
+        // then
+        assertEquals(22.99, altitude_egm2008.correctAltitude(trackPoint.getLocation()), MAX_BILINEAR_ERROR);
+    }
+
     @Test
     public void data_MaxUndulation() throws IOException {
         // given
@@ -191,6 +207,7 @@ public class EGM2008UtilsTest {
         assertEquals(-85.824, altitude_egm2008.correctAltitude(trackPoint.getLocation()), MAX_BILINEAR_ERROR);
     }
 
+
     @Test
     public void getIndices() {
         TrackPoint trackPoint = new TrackPoint(TrackPoint.Type.TRACKPOINT, Instant.ofEpochMilli(0));
@@ -208,7 +225,7 @@ public class EGM2008UtilsTest {
 
         trackPoint.setLatitude(-90);
         trackPoint.setLongitude(-180);
-        assertEquals(new EGM2008Utils.Indices(2160, 0), EGM2008Utils.getIndices(trackPoint.getLocation()));
+        assertEquals(new EGM2008Utils.Indices(2160, 2160), EGM2008Utils.getIndices(trackPoint.getLocation()));
     }
 
     @Test

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

@@ -1,63 +0,0 @@
-package de.dennisguse.opentracks.util;
-
-import junit.framework.TestCase;
-
-import org.junit.Test;
-import org.junit.runner.RunWith;
-import org.junit.runners.JUnit4;
-
-import java.util.ArrayList;
-import java.util.List;
-import java.util.UUID;
-
-@RunWith(JUnit4.class)
-public class ExportUtilsTest extends TestCase {
-
-    @Test
-    public void testIsExportFileExists_exists() {
-        // given
-        UUID uuid = UUID.randomUUID();
-        String format = "kmz";
-        List<String> fileNames = new ArrayList<>();
-        fileNames.add(uuid.toString().substring(0, 8) + "_name.gpx");
-        fileNames.add(uuid.toString().substring(0, 8) + "_other name name.kmz");
-
-        // when
-        boolean exists = ExportUtils.isExportFileExists(uuid, format, fileNames);
-
-        // then
-        assertTrue(exists);
-    }
-
-    @Test
-    public void testIsExportFileExists_not_exists1() {
-        // given
-        UUID uuid = UUID.randomUUID();
-        String format = "gpx";
-        List<String> fileNames = new ArrayList<>();
-        fileNames.add(UUID.randomUUID().toString().substring(0, 8) + "_name.gpx");
-        fileNames.add(UUID.randomUUID().toString().substring(0, 8) + "_other name name.gpx");
-
-        // when
-        boolean exists = ExportUtils.isExportFileExists(uuid, format, fileNames);
-
-        // then
-        assertFalse(exists);
-    }
-
-    @Test
-    public void testIsExportFileExists_not_exists2() {
-        // given
-        UUID uuid = UUID.randomUUID();
-        String format = "kmz";
-        List<String> fileNames = new ArrayList<>();
-        fileNames.add(uuid.toString().substring(0, 8) + "_name.gpx");
-        fileNames.add(UUID.randomUUID().toString().substring(0, 8) + "_other name name.gpx");
-
-        // when
-        boolean exists = ExportUtils.isExportFileExists(uuid, format, fileNames);
-
-        // then
-        assertFalse(exists);
-    }
-}

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

@@ -41,12 +41,12 @@ import java.time.format.TextStyle;
 import java.time.temporal.ChronoUnit;
 import java.util.ArrayList;
 import java.util.Arrays;
-import java.util.GregorianCalendar;
 import java.util.Locale;
 import java.util.TimeZone;
 import java.util.stream.Collectors;
 
 import de.dennisguse.opentracks.LocaleRule;
+import de.dennisguse.opentracks.TimezoneRule;
 
 /**
  * Tests for {@link StringUtils}.
@@ -59,6 +59,9 @@ public class StringUtilsTest {
     @Rule
     public final LocaleRule mLocaleRule = new LocaleRule(Locale.ENGLISH);
 
+    @Rule
+    public TimezoneRule timezoneRule = new TimezoneRule(TimeZone.getTimeZone("Europe/Berlin"));
+
     private final Context context = ApplicationProvider.getApplicationContext();
 
     /**
@@ -99,51 +102,13 @@ public class StringUtilsTest {
     }
 
     @Test
-    public void testGetTime_fractional() {
+    public void testParseTime() {
-        assertGetTime("2010-05-04T03:02:01.352Z", 2010, 5, 4, 3, 2, 1, 352);
+        assertEquals(Instant.ofEpochMilli(352), StringUtils.parseTime("1970-01-01T00:00:00.352").toInstant());
-        assertGetTime("2010-05-04T03:02:01.3529Z", 2010, 5, 4, 3, 2, 1, 352);
+        assertEquals(Instant.ofEpochMilli(352), StringUtils.parseTime("1970-01-01T00:00:00.352Z").toInstant());
-    }
+        assertEquals(Instant.ofEpochMilli(352), StringUtils.parseTime("1970-01-01T00:00:00.352+00:00").toInstant());
 
-    @Test
+        assertEquals(Instant.ofEpochMilli(352), StringUtils.parseTime("1970-01-01T01:00:00.352+01:00").toInstant());
-    public void testGetTime_timezone() {
+        assertEquals(Instant.ofEpochMilli(352).plus(Duration.ofHours(1)), StringUtils.parseTime("1970-01-01T00:00:00.352-01:00").toInstant());
-        assertGetTime("2010-05-04T03:02:01", 2010, 5, 4, 3, 2, 1, 0);
-        assertGetTime("2010-05-04T03:02:01Z", 2010, 5, 4, 3, 2, 1, 0);
-        assertGetTime("2010-05-04T03:02:01+00:00", 2010, 5, 4, 3, 2, 1, 0);
-        assertGetTime("2010-05-04T03:02:01-00:00", 2010, 5, 4, 3, 2, 1, 0);
-        assertGetTime("2010-05-04T03:02:01+01:00", 2010, 5, 4, 2, 2, 1, 0);
-        assertGetTime("2010-05-04T03:02:01+10:30", 2010, 5, 3, 16, 32, 1, 0);
-        assertGetTime("2010-05-04T03:02:01-09:30", 2010, 5, 4, 12, 32, 1, 0);
-        assertGetTime("2010-05-04T03:02:01-05:00", 2010, 5, 4, 8, 2, 1, 0);
-    }
-
-    @Test
-    public void testGetTime_fractionalAndTimezone() {
-        assertGetTime("2010-05-04T03:02:01.352Z", 2010, 5, 4, 3, 2, 1, 352);
-        assertGetTime("2010-05-04T03:02:01.47+00:00", 2010, 5, 4, 3, 2, 1, 470);
-        assertGetTime("2010-05-04T03:02:01.5791+03:00", 2010, 5, 4, 0, 2, 1, 579);
-        assertGetTime("2010-05-04T03:02:01.8-05:30", 2010, 5, 4, 8, 32, 1, 800);
-    }
-
-    /**
-     * Asserts the {@link StringUtils#parseTime(String)} returns the expected values.
-     *
-     * @param xmlDateTime the xml date time string
-     * @param year        the expected year
-     * @param month       the expected month
-     * @param day         the expected day
-     * @param hour        the expected hour
-     * @param minute      the expected minute
-     * @param second      the expected second
-     * @param millisecond the expected milliseconds
-     */
-    private void assertGetTime(String xmlDateTime, int year, int month, int day, int hour, int minute, int second, int millisecond) {
-        GregorianCalendar calendar = new GregorianCalendar(TimeZone.getTimeZone("UTC"));
-        calendar.set(year, month - 1, day, hour, minute, second);
-        calendar.set(GregorianCalendar.MILLISECOND, millisecond);
-
-        // This comparision tends to be flaky (difference of 1ms)
-        // Assert.assertEquals(calendar.getTimeInMillis(), StringUtils.parseTime(xmlDateTime));
-        assertTrue(calendar.getTimeInMillis() + " vs. " + StringUtils.parseTime(xmlDateTime), Math.abs(calendar.getTimeInMillis() - StringUtils.parseTime(xmlDateTime).toInstant().toEpochMilli()) <= 1);
     }
 
     @Test

src/androidTest/res/raw/gpx_timezone.gpx

@@ -0,0 +1,45 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<gpx
+version="1.1"
+creator="OpenTracks (Debug)"
+xmlns="http://www.topografix.com/GPX/1/1"
+xmlns:topografix="http://www.topografix.com/GPX/Private/TopoGrafix/0/1"
+xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+xmlns:opentracks="http://opentracksapp.com/xmlschemas/v1"
+xmlns:gpxtpx="http://www.garmin.com/xmlschemas/TrackPointExtension/v2"
+xmlns:gpxtrkx="http://www.garmin.com/xmlschemas/TrackStatsExtension/v1"
+xmlns:cluetrust="http://www.cluetrust.com/Schemas/"
+xmlns:pwr="http://www.garmin.com/xmlschemas/PowerExtension/v1"
+xsi:schemaLocation="http://www.topografix.com/GPX/1/1 http://www.topografix.com/GPX/1/1/gpx.xsd http://www.topografix.com/GPX/Private/TopoGrafix/0/1 http://www.topografix.com/GPX/Private/TopoGrafix/0/1/topografix.xsd http://www.garmin.com/xmlschemas/TrackPointExtension/v2 https://www8.garmin.com/xmlschemas/TrackPointExtensionv2.xsd http://www.garmin.com/xmlschemas/PowerExtension/v1 https://www8.garmin.com/xmlschemas/PowerExtensionv1.xsd http://www.garmin.com/xmlschemas/TrackStatsExtension/v1 http://www.cluetrust.com/Schemas http://www.cluetrust.com/Schemas/gpxdata10.xsd http://opentracksapp.com/xmlschemas/v1 http://opentracksapp.com/xmlschemas/OpenTracks_v1.xsd">
+<wpt lat="3" lon="14">
+<ele>10</ele>
+<time>2021-01-07T21:51:59.179+01:15</time>
+<name><![CDATA[Marker 1]]></name>
+<desc><![CDATA[Marker 1 desc]]></desc>
+<type><![CDATA[Marker 1 category]]></type>
+</wpt>
+<trk>
+<name><![CDATA[2021-01-07 22:51]]></name>
+<desc><![CDATA[the description]]></desc>
+<type><![CDATA[the category]]></type>
+<extensions>
+<topografix:color>c0c0c0</topografix:color>
+<opentracks:trackid>7002101e-4198-4613-8c24-544e01ca3981</opentracks:trackid>
+<gpxtrkx:TrackStatsExtension>
+<gpxtrkx:Distance>0.0</gpxtrkx:Distance>
+<gpxtrkx:TimerTime>0</gpxtrkx:TimerTime>
+<gpxtrkx:MovingTime>0</gpxtrkx:MovingTime>
+<gpxtrkx:StoppedTime>0</gpxtrkx:StoppedTime>
+<gpxtrkx:MaxSpeed>0.0</gpxtrkx:MaxSpeed>
+<gpxtrkx:Ascent>null</gpxtrkx:Ascent>
+<gpxtrkx:Descent>null</gpxtrkx:Descent>
+</gpxtrkx:TrackStatsExtension>
+</extensions>
+<trkseg>
+<trkpt lat="3" lon="14">
+<ele>10</ele>
+<time>2021-01-07T21:51:59.179+01:15</time>
+</trkpt>
+</trkseg>
+</trk>
+</gpx>

src/main/AndroidManifest.xml

@@ -59,6 +59,8 @@ limitations under the License.
         tools:targetApi="s" />
     <uses-permission android:name="android.permission.BLUETOOTH_CONNECT" />
 
+    <uses-permission android:name="android.permission.POST_NOTIFICATIONS" />
+
     <application
         android:name=".Startup"
         android:allowBackup="false"

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

@@ -84,8 +84,8 @@ public abstract class AbstractTrackDeleteActivity extends AbstractActivity imple
     /**
      * Called every time a track is deleted.
      */
-    protected void onTrackDeleteStatus(TrackDeleteService.DeleteStatus deleteStatus) {
+    protected void onTrackDeleteStatus(TrackDeleteService.DeletionFinishedStatus deletionFinishedStatus) {
-        if (deleteStatus.isFinished() && trackDeleteServiceConnection != null) {
+        if (trackDeleteServiceConnection != null) {
             trackDeleteServiceConnection.unbind(this);
             trackDeleteServiceConnection = null;
             onDeleteFinished();

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

@@ -3,19 +3,15 @@ package de.dennisguse.opentracks;
 import android.content.Intent;
 import android.net.Uri;
 import android.os.Bundle;
-import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
 
-import androidx.appcompat.app.AppCompatActivity;
-
 import java.io.UnsupportedEncodingException;
 import java.net.URLEncoder;
 import java.nio.charset.StandardCharsets;
 
 import de.dennisguse.opentracks.databinding.ActivityShowErrorBinding;
-import de.dennisguse.opentracks.databinding.TrackListBinding;
 
 public class ShowErrorActivity extends AbstractActivity {
 

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

@@ -70,7 +70,7 @@ import de.dennisguse.opentracks.ui.util.ActivityUtils;
 import de.dennisguse.opentracks.ui.util.ListItemUtils;
 import de.dennisguse.opentracks.util.IntentDashboardUtils;
 import de.dennisguse.opentracks.util.IntentUtils;
-import de.dennisguse.opentracks.util.PermissionUtils;
+import de.dennisguse.opentracks.util.PermissionRequester;
 import de.dennisguse.opentracks.util.StringUtils;
 import de.dennisguse.opentracks.util.TrackIconUtils;
 
@@ -241,7 +241,7 @@ public class TrackListActivity extends AbstractTrackDeleteActivity implements Co
                 startActivity(newIntent);
 
                 connection.unbind(this);
-            }).startAndBind(this);
+            }).startAndBind(this, true);
         });
         viewBinding.trackListFabAction.setOnLongClickListener((view) -> {
             if (!recordingStatus.isRecording()) {
@@ -263,13 +263,7 @@ public class TrackListActivity extends AbstractTrackDeleteActivity implements Co
     }
 
     private void requestRequiredPermissions() {
-        if (!PermissionUtils.hasGPSPermission(this)) {
+        PermissionRequester.ALL.requestPermissionsIfNeeded(this, this, null, (requester) -> Toast.makeText(this, R.string.permission_gps_failed, Toast.LENGTH_SHORT).show());
-            PermissionUtils.requestGPSPermission(this, null, () -> Toast.makeText(this, R.string.permission_gps_failed, Toast.LENGTH_SHORT).show());
-        }
-
-        if (!PermissionUtils.hasBluetoothPermissions(this)) {
-            PermissionUtils.requestBluetoothPermission(this, null, null);
-        }
     }
 
     @Override
@@ -323,8 +317,8 @@ public class TrackListActivity extends AbstractTrackDeleteActivity implements Co
         searchView.findViewById(R.id.search_edit_frame).setPadding(0, 0, 48, 0);
 
         SearchView.SearchAutoComplete searchAutoComplete = searchView.findViewById(R.id.search_src_text);
-        searchAutoComplete.setHintTextColor(getResources().getColor(android.R.color.white));
+        searchAutoComplete.setHintTextColor(ContextCompat.getColor(this, android.R.color.white));
-        searchAutoComplete.setTextColor(getResources().getColor(android.R.color.white));
+        searchAutoComplete.setTextColor(ContextCompat.getColor(this, android.R.color.white));
 
         searchView.setOnCloseListener(() -> {
             searchView.clearFocus();

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

@@ -213,7 +213,7 @@ public class TrackRecordedActivity extends AbstractTrackDeleteActivity implement
 
                 connection.unbind(this);
                 finish();
-            }).startAndBind(this);
+            }).startAndBind(this, true);
             return true;
         }
 
@@ -232,9 +232,9 @@ public class TrackRecordedActivity extends AbstractTrackDeleteActivity implement
     }
 
     @Override
-    protected void onTrackDeleteStatus(TrackDeleteService.DeleteStatus deleteStatus) {
+    protected void onTrackDeleteStatus(TrackDeleteService.DeletionFinishedStatus deletionFinishedStatus) {
-        super.onTrackDeleteStatus(deleteStatus);
+        super.onTrackDeleteStatus(deletionFinishedStatus);
-        if (deleteStatus.isDeleted(trackId)) {
+        if (deletionFinishedStatus.isDeleted(trackId)) {
             runOnUiThread(this::finish);
         }
     }

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

@@ -11,8 +11,6 @@ import android.util.Log;
 import android.view.Menu;
 import android.view.MenuItem;
 import android.view.View;
-import android.view.WindowInsets;
-import android.view.WindowInsetsController;
 import android.view.WindowManager;
 import android.widget.Toast;
 
@@ -49,7 +47,6 @@ import de.dennisguse.opentracks.ui.markers.MarkerEditActivity;
 import de.dennisguse.opentracks.ui.markers.MarkerListActivity;
 import de.dennisguse.opentracks.util.IntentDashboardUtils;
 import de.dennisguse.opentracks.util.IntentUtils;
-import de.dennisguse.opentracks.util.PermissionUtils;
 import de.dennisguse.opentracks.util.TrackIconUtils;
 import de.dennisguse.opentracks.util.TrackUtils;
 
@@ -138,7 +135,7 @@ public class TrackRecordingActivity extends AbstractActivity implements ChooseAc
 
         viewBinding.trackRecordingFabAction.setImageResource(R.drawable.ic_baseline_stop_24);
         viewBinding.trackRecordingFabAction.setBackgroundTintList(ContextCompat.getColorStateList(this, R.color.opentracks_secondary_color));
-        viewBinding.trackRecordingFabAction.setBackgroundColor(getResources().getColor(R.color.opentracks_secondary_color));
+        viewBinding.trackRecordingFabAction.setBackgroundColor(ContextCompat.getColor(this, R.color.opentracks_secondary_color));
         viewBinding.trackRecordingFabAction.setOnLongClickListener((view) -> {
             ((Vibrator) getSystemService(Context.VIBRATOR_SERVICE)).vibrate(1000);
             trackRecordingServiceConnection.stopRecording(TrackRecordingActivity.this);

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

@@ -90,18 +90,25 @@ public class TrackStoppedActivity extends AbstractTrackDeleteActivity implements
         }
 
         viewBinding.finishButton.setOnClickListener(v -> {
-            TrackUtils.updateTrack(TrackStoppedActivity.this, track, viewBinding.trackEditName.getText().toString(),
+            storeTrackMetaData(contentProviderUtils, track);
-                    viewBinding.trackEditActivityType.getText().toString(), viewBinding.trackEditDescription.getText().toString(),
-                    contentProviderUtils);
             ExportUtils.postWorkoutExport(this, trackId);
             finish();
         });
 
-        viewBinding.resumeButton.setOnClickListener(v -> resumeTrackAndFinish());
+        viewBinding.resumeButton.setOnClickListener(v -> {
+            storeTrackMetaData(contentProviderUtils, track);
+            resumeTrackAndFinish();
+        });
 
         viewBinding.discardButton.setOnClickListener(v -> ConfirmDeleteDialogFragment.showDialog(getSupportFragmentManager(), trackId));
     }
 
+    private void storeTrackMetaData(ContentProviderUtils contentProviderUtils, Track track) {
+        TrackUtils.updateTrack(TrackStoppedActivity.this, track, viewBinding.trackEditName.getText().toString(),
+                viewBinding.trackEditActivityType.getText().toString(), viewBinding.trackEditDescription.getText().toString(),
+                contentProviderUtils);
+    }
+
     @Override
     public void onBackPressed() {
         if (isDiscarding) {
@@ -138,7 +145,7 @@ public class TrackStoppedActivity extends AbstractTrackDeleteActivity implements
 
             connection.unbind(this);
             finish();
-        }).startAndBind(this);
+        }).startAndBind(this, true);
     }
 
     @Override

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

@@ -32,9 +32,7 @@ import java.util.List;
 
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.data.TrackDataHub;
-import de.dennisguse.opentracks.data.models.Altitude;
 import de.dennisguse.opentracks.data.models.Marker;
-import de.dennisguse.opentracks.data.models.Speed;
 import de.dennisguse.opentracks.data.models.Track;
 import de.dennisguse.opentracks.data.models.TrackPoint;
 import de.dennisguse.opentracks.databinding.ChartBinding;
@@ -188,9 +186,9 @@ public class ChartFragment extends Fragment implements TrackDataHub.Listener {
         }
     }
 
-    public void onSampledInTrackPoint(@NonNull TrackPoint trackPoint, @NonNull TrackStatistics trackStatistics, Speed smoothedSpeed, Altitude smoothedAltitude) {
+    public void onSampledInTrackPoint(@NonNull TrackPoint trackPoint, @NonNull TrackStatistics trackStatistics) {
         if (isResumed()) {
-            ChartPoint point = new ChartPoint(trackStatistics, trackPoint, smoothedSpeed, smoothedAltitude, chartByDistance, viewBinding.chartView.getUnitSystem());
+            ChartPoint point = new ChartPoint(trackStatistics, trackPoint, trackPoint.getSpeed(), chartByDistance, viewBinding.chartView.getUnitSystem());
             pendingPoints.add(point);
         }
     }

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

@@ -3,7 +3,6 @@ package de.dennisguse.opentracks.chart;
 import androidx.annotation.NonNull;
 import androidx.annotation.VisibleForTesting;
 
-import de.dennisguse.opentracks.data.models.Altitude;
 import de.dennisguse.opentracks.data.models.Distance;
 import de.dennisguse.opentracks.data.models.Speed;
 import de.dennisguse.opentracks.data.models.TrackPoint;
@@ -29,15 +28,15 @@ public class ChartPoint {
         this.altitude = altitude;
     }
 
-    public ChartPoint(@NonNull TrackStatistics trackStatistics, @NonNull TrackPoint trackPoint, Speed smoothedSpeed, Altitude smoothedAltitude, boolean chartByDistance, UnitSystem unitSystem) {
+    public ChartPoint(@NonNull TrackStatistics trackStatistics, @NonNull TrackPoint trackPoint, Speed smoothedSpeed, boolean chartByDistance, UnitSystem unitSystem) {
         if (chartByDistance) {
             timeOrDistance = trackStatistics.getTotalDistance().toKM_Miles(unitSystem);
         } else {
             timeOrDistance = trackStatistics.getTotalTime().toMillis();
         }
 
-        if (smoothedAltitude != null) {
+        if (trackPoint.hasAltitude()) {
-            altitude = Distance.of(smoothedAltitude.toM()).toM_FT(unitSystem);
+            altitude = Distance.of(trackPoint.getAltitude().toM()).toM_FT(unitSystem);
         }
 
         if (smoothedSpeed != null) {

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

@@ -24,6 +24,7 @@ import android.graphics.Paint.Style;
 import android.graphics.Path;
 
 import androidx.annotation.NonNull;
+import androidx.core.content.ContextCompat;
 
 import java.text.NumberFormat;
 
@@ -44,6 +45,7 @@ abstract class ChartValueSeries {
     private final int[] intervalValues;
     private final int metricTitleId;
     private final int imperialTitleId;
+    private final int nauticalTitleId;
     private final Paint fillPaint;
     private final Paint strokePaint;
     private final Paint titlePaint;
@@ -57,33 +59,22 @@ abstract class ChartValueSeries {
     private int maxMarkerValue = interval * ChartView.Y_AXIS_INTERVALS;
     private boolean enabled = true;
 
-    /**
+    ChartValueSeries(Context context, int absoluteMin, int absoluteMax, int[] intervalValues, int metricTitleId, int imperialTitleId, int nauticalTitleId, int fillColor, int strokeColor, int fontSizeSmall, int fontSizeMedium) {
-     * Constructor.
-     *
-     * @param context         the context
-     * @param absoluteMin     the absolute min value
-     * @param absoluteMax     the absolute max value
-     * @param intervalValues  the list of interval values
-     * @param metricTitleId   the metric title id
-     * @param imperialTitleId the imperial title id
-     * @param fillColor       the fill color
-     * @param strokeColor     the stroke color
-     */
-    ChartValueSeries(Context context, int absoluteMin, int absoluteMax, int[] intervalValues, int metricTitleId, int imperialTitleId, int fillColor, int strokeColor, int fontSizeSmall, int fontSizeMedium) {
         this.absoluteMin = absoluteMin;
         this.absoluteMax = absoluteMax;
         this.intervalValues = intervalValues;
         this.metricTitleId = metricTitleId;
         this.imperialTitleId = imperialTitleId;
+        this.nauticalTitleId = nauticalTitleId;
 
         fillPaint = new Paint();
         fillPaint.setStyle(Style.FILL);
-        fillPaint.setColor(context.getResources().getColor(fillColor));
+        fillPaint.setColor(ContextCompat.getColor(context, fillColor));
         fillPaint.setAntiAlias(true);
 
         strokePaint = new Paint();
         strokePaint.setStyle(Style.STROKE);
-        strokePaint.setColor(context.getResources().getColor(strokeColor));
+        strokePaint.setColor(ContextCompat.getColor(context, strokeColor));
         strokePaint.setAntiAlias(true);
 
         // Make copies of the stroke paint with the default thickness
@@ -224,39 +215,27 @@ abstract class ChartValueSeries {
                 return metricTitleId;
             case IMPERIAL:
                 return imperialTitleId;
+            case NAUTICAL_IMPERIAL:
+                return nauticalTitleId;
             default:
                 throw new RuntimeException("Not implemented");
         }
     }
 
-    /**
-     * Gets the title paint.
-     */
     Paint getTitlePaint() {
         return titlePaint;
     }
 
-    /**
-     * Gets the marker paint.
-     */
     Paint getMarkerPaint() {
         return markerPaint;
     }
 
-    /**
-     * Gets the largest marker.
-     */
     String getLargestMarker() {
         String minMarker = numberFormat.format(getMinMarkerValue());
         String maxMarker = numberFormat.format(getMaxMarkerValue());
         return minMarker.length() >= maxMarker.length() ? minMarker : maxMarker;
     }
 
-    /**
-     * Formats a marker value.
-     *
-     * @param value the value
-     */
     String formatMarker(int value) {
         return numberFormat.format(value);
     }

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

@@ -203,6 +203,7 @@ public class ChartView extends View {
                 new int[]{5, 10, 25, 50, 100, 250, 500, 1000, 2500, 5000},
                 R.string.description_altitude_metric,
                 R.string.description_altitude_imperial,
+                R.string.description_altitude_imperial,
                 R.color.chart_altitude_fill,
                 R.color.chart_altitude_border,
                 fontSizeSmall,
@@ -224,6 +225,7 @@ public class ChartView extends View {
                 new int[]{1, 5, 10, 20, 50, 100},
                 R.string.description_speed_metric,
                 R.string.description_speed_imperial,
+                R.string.description_speed_nautical,
                 R.color.chart_speed_fill,
                 R.color.chart_speed_border,
                 fontSizeSmall,
@@ -246,6 +248,7 @@ public class ChartView extends View {
                 new int[]{1, 2, 5, 10, 15, 20, 30, 60, 120},
                 R.string.description_pace_metric,
                 R.string.description_pace_imperial,
+                R.string.description_pace_nautical,
                 R.color.chart_pace_fill,
                 R.color.chart_pace_border,
                 fontSizeSmall,
@@ -268,6 +271,7 @@ public class ChartView extends View {
                 new int[]{25, 50},
                 R.string.description_sensor_heart_rate,
                 R.string.description_sensor_heart_rate,
+                R.string.description_sensor_heart_rate,
                 R.color.chart_heart_rate_fill,
                 R.color.chart_heart_rate_border,
                 fontSizeSmall,
@@ -289,6 +293,7 @@ public class ChartView extends View {
                 new int[]{5, 10, 25, 50},
                 R.string.description_sensor_cadence,
                 R.string.description_sensor_cadence,
+                R.string.description_sensor_cadence,
                 R.color.chart_cadence_fill,
                 R.color.chart_cadence_border,
                 fontSizeSmall,
@@ -309,6 +314,7 @@ public class ChartView extends View {
                 new int[]{5, 50, 100, 200},
                 R.string.description_sensor_power,
                 R.string.description_sensor_power,
+                R.string.description_sensor_power,
                 R.color.chart_power_fill,
                 R.color.chart_power_border,
                 fontSizeSmall,
@@ -732,6 +738,8 @@ public class ChartView extends View {
                     return context.getString(R.string.unit_kilometer);
                 case IMPERIAL:
                     return context.getString(R.string.unit_mile);
+                case NAUTICAL_IMPERIAL:
+                    return context.getString(R.string.unit_nautical_mile);
                 default:
                     throw new RuntimeException("Not implemented");
             }

src/main/java/de/dennisguse/opentracks/data/ContentProviderUtils.java

@@ -187,7 +187,6 @@ public class ContentProviderUtils {
             FileUtils.deleteDirectoryRecurse(FileUtils.getPhotoDir(context, trackId));
         }
 
-        // Delete track last since it triggers a database vacuum call
         String whereClause = String.format(TracksColumns._ID + " IN (%s)", TextUtils.join(",", Collections.nCopies(trackIds.size(), "?")));
         contentResolver.delete(TracksColumns.CONTENT_URI, whereClause, trackIds.stream().map(id -> Long.toString(id.getId())).toArray(String[]::new));
     }
@@ -195,8 +194,6 @@ public class ContentProviderUtils {
     public void deleteTrack(Context context, @NonNull Track.Id trackId) {
         // Delete track folder resources.
         FileUtils.deleteDirectoryRecurse(FileUtils.getPhotoDir(context, trackId));
-
-        // Delete track last since it triggers a database vacuum call
         contentResolver.delete(TracksColumns.CONTENT_URI, TracksColumns._ID + "=?", new String[]{Long.toString(trackId.getId())});
     }
 

src/main/java/de/dennisguse/opentracks/data/CustomContentProvider.java

@@ -27,6 +27,7 @@ import android.database.sqlite.SQLiteDatabase;
 import android.database.sqlite.SQLiteException;
 import android.database.sqlite.SQLiteQueryBuilder;
 import android.net.Uri;
+import android.os.Bundle;
 import android.text.TextUtils;
 import android.util.Log;
 
@@ -39,6 +40,7 @@ import de.dennisguse.opentracks.data.models.TrackPoint;
 import de.dennisguse.opentracks.data.tables.MarkerColumns;
 import de.dennisguse.opentracks.data.tables.TrackPointsColumns;
 import de.dennisguse.opentracks.data.tables.TracksColumns;
+import de.dennisguse.opentracks.settings.PreferencesUtils;
 
 /**
  * A {@link ContentProvider} that handles access to track points, tracks, and markers tables.
@@ -53,6 +55,8 @@ public class CustomContentProvider extends ContentProvider {
 
     private static final String SQL_LIST_DELIMITER = ",";
 
+    private static final int TOTAL_DELETED_ROWS_VACUUM_THRESHOLD = 10000;
+
     private final UriMatcher uriMatcher;
 
     private SQLiteDatabase db;
@@ -131,14 +135,12 @@ public class CustomContentProvider extends ContentProvider {
     @Override
     public int delete(@NonNull Uri url, String where, String[] selectionArgs) {
         String table;
-        boolean shouldVacuum = false;
         switch (getUrlType(url)) {
             case TRACKPOINTS:
                 table = TrackPointsColumns.TABLE_NAME;
                 break;
             case TRACKS:
                 table = TracksColumns.TABLE_NAME;
-                shouldVacuum = true;
                 break;
             case MARKERS:
                 table = MarkerColumns.TABLE_NAME;
@@ -147,23 +149,40 @@ public class CustomContentProvider extends ContentProvider {
                 throw new IllegalArgumentException("Unknown URL " + url);
         }
 
-        Log.w(TAG, "Deleting table " + table);
+        Log.w(TAG, "Deleting from table " + table);
-        int count;
+        int totalChangesBefore = getTotalChanges();
+        int deletedRowsFromTable;
         try {
             db.beginTransaction();
-            count = db.delete(table, where, selectionArgs);
+            deletedRowsFromTable = db.delete(table, where, selectionArgs);
+            Log.i(TAG, "Deleted " + deletedRowsFromTable + " rows of table " + table);
             db.setTransactionSuccessful();
         } finally {
             db.endTransaction();
         }
         getContext().getContentResolver().notifyChange(url, null, false);
 
-        if (shouldVacuum) {
+        int totalChanges = getTotalChanges() - totalChangesBefore;
-            // If a potentially large amount of data was deleted, reclaim its space.
+        Log.i(TAG, "Deleted " + totalChanges + " total rows from database");
-            Log.i(TAG, "Vacuuming the database.");
+
+        PreferencesUtils.addTotalRowsDeleted(totalChanges);
+        int totalRowsDeleted = PreferencesUtils.getTotalRowsDeleted();
+        if (totalRowsDeleted > TOTAL_DELETED_ROWS_VACUUM_THRESHOLD) {
+            Log.i(TAG, "TotalRowsDeleted " + totalRowsDeleted + ", starting to vacuum the database.");
             db.execSQL("VACUUM");
+            PreferencesUtils.resetTotalRowsDeleted();
         }
-        return count;
+
+        return deletedRowsFromTable;
+    }
+
+    private int getTotalChanges() {
+        int totalCount;
+        try (Cursor cursor = db.rawQuery("SELECT total_changes()", null)) {
+            cursor.moveToNext();
+            totalCount = cursor.getInt(0);
+        }
+        return totalCount;
     }
 
     @Override

src/main/java/de/dennisguse/opentracks/data/ShareContentProvider.java

@@ -24,6 +24,7 @@ import java.util.Collections;
 import java.util.HashSet;
 import java.util.List;
 import java.util.Set;
+import java.util.stream.Collectors;
 
 import de.dennisguse.opentracks.data.models.Track;
 import de.dennisguse.opentracks.data.tables.TracksColumns;
@@ -72,9 +73,7 @@ public class ShareContentProvider extends CustomContentProvider {
      * @return An URI for one file containing this tracks.
      */
     public static Pair<Uri, String> createURI(Track.Id trackId, String trackName, @NonNull TrackFileFormat trackFileFormat) {
-        Set<Track.Id> trackIds = new HashSet<>(1);
+        return createURI(Set.of(trackId), trackName, trackFileFormat);
-        trackIds.add(trackId);
-        return createURI(trackIds, trackName, trackFileFormat);
     }
 
     /**
@@ -108,11 +107,7 @@ public class ShareContentProvider extends CustomContentProvider {
 
         String[] uriTrackIds = uriPaths.get(2).split(TRACKID_DELIMITER);
 
-        Set<Track.Id> trackIds = new HashSet<>();
+        return Arrays.stream(uriTrackIds).map(uriTrackId -> new Track.Id(Long.parseLong(uriTrackId))).collect(Collectors.toSet());
-        for (String uriTrackId : uriTrackIds) {
-            trackIds.add(new Track.Id(Long.parseLong(uriTrackId)));
-        }
-        return trackIds;
     }
 
     /**

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

@@ -25,16 +25,13 @@ import android.os.HandlerThread;
 import android.util.Log;
 
 import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 
 import java.util.Collections;
 import java.util.HashSet;
 import java.util.Set;
 
-import de.dennisguse.opentracks.data.models.Altitude;
 import de.dennisguse.opentracks.data.models.Marker;
-import de.dennisguse.opentracks.data.models.Speed;
 import de.dennisguse.opentracks.data.models.Track;
 import de.dennisguse.opentracks.data.models.TrackPoint;
 import de.dennisguse.opentracks.data.tables.MarkerColumns;
@@ -367,7 +364,7 @@ public class TrackDataHub {
                 // Also include the last point if the selected track is not recording.
                 if ((localNumLoadedTrackPoints % samplingFrequency == 0) || (trackPointId == lastTrackPointId && !isSelectedTrackRecording())) {
                     for (Listener trackDataListener : listeners) {
-                        trackDataListener.onSampledInTrackPoint(trackPoint, currentUpdater.getTrackStatistics(), currentUpdater.getSmoothedSpeed(), currentUpdater.getSmoothedAltitude());
+                        trackDataListener.onSampledInTrackPoint(trackPoint, currentUpdater.getTrackStatistics());
                     }
                 } else {
                     for (Listener trackDataListener : listeners) {
@@ -432,7 +429,7 @@ public class TrackDataHub {
          *
          * @param trackPoint the trackPoint
          */
-        default void onSampledInTrackPoint(@NonNull TrackPoint trackPoint, @NonNull TrackStatistics trackStatistics, Speed smoothedSpeed, @Nullable Altitude smoothedAltitude_m) {
+        default void onSampledInTrackPoint(@NonNull TrackPoint trackPoint, @NonNull TrackStatistics trackStatistics) {
         }
 
         /**

src/main/java/de/dennisguse/opentracks/data/models/Distance.java

@@ -13,6 +13,14 @@ public class Distance {
         return new Distance(distance_m);
     }
 
+    public static Distance of(Double distance_m) {
+        if (distance_m == null) {
+            return Distance.of(Double.NaN);
+        } else {
+            return Distance.of((double) distance_m);
+        }
+    }
+
     public static Distance of(String distance_m) {
         return of(Float.parseFloat(distance_m));
     }
@@ -29,6 +37,10 @@ public class Distance {
         return of(distance_mile * UnitConversions.MI_TO_M);
     }
 
+    public static Distance ofNauticalMile(double distance_mile) {
+        return of(distance_mile * UnitConversions.NAUTICAL_MILE_TO_M);
+    }
+
     public static Distance ofKilometer(double distance_km) {
         return of(distance_km * UnitConversions.KM_TO_M);
     }
@@ -51,6 +63,8 @@ public class Distance {
                 return Distance.ofKilometer(1);
             case IMPERIAL:
                 return Distance.ofMile(1);
+            case NAUTICAL_IMPERIAL:
+                return Distance.ofNauticalMile(1);
             default:
                 throw new RuntimeException("Not implemented");
         }
@@ -114,12 +128,18 @@ public class Distance {
         return toKM() * UnitConversions.KM_TO_MI;
     }
 
+    public double toNauticalMiles() {
+        return toKM() * UnitConversions.KM_TO_NAUTICAL_MILE;
+    }
+
     public double toKM_Miles(UnitSystem unitSystem) {
         switch (unitSystem) {
             case METRIC:
                 return toKM();
             case IMPERIAL:
                 return toMI();
+            case NAUTICAL_IMPERIAL:
+                return toNauticalMiles();
             default:
                 throw new RuntimeException("Not implemented");
         }
@@ -129,6 +149,7 @@ public class Distance {
         switch (unitSystem) {
             case METRIC:
                 return toM();
+            case NAUTICAL_IMPERIAL:
             case IMPERIAL:
                 return toFT();
             default:

src/main/java/de/dennisguse/opentracks/data/models/DistanceFormatter.java

@@ -42,11 +42,13 @@ public class DistanceFormatter {
      */
     public Pair<String, String> getDistanceParts(Distance distance) {
         if (distance.isInvalid()) {
+            String valueUnknown = resources.getString(R.string.value_unknown);
             switch (unitSystem) {
                 case METRIC:
-                    return new Pair<>(null, resources.getString(R.string.unit_meter));
+                    return new Pair<>(valueUnknown, resources.getString(R.string.unit_meter));
                 case IMPERIAL:
-                    return new Pair<>(null, resources.getString(R.string.unit_feet));
+                case NAUTICAL_IMPERIAL:
+                    return new Pair<>(valueUnknown, resources.getString(R.string.unit_feet));
                 default:
                     throw new RuntimeException("Not implemented");
             }
@@ -65,6 +67,12 @@ public class DistanceFormatter {
                 } else {
                     return new Pair<>(StringUtils.formatDecimal(distance.toFT(), decimalCount), resources.getString(R.string.unit_feet));
                 }
+            case NAUTICAL_IMPERIAL:
+                if (distance.greaterThan(Distance.ofNauticalMile(0.5))) {
+                    return new Pair<>(StringUtils.formatDecimal(distance.toNauticalMiles(), decimalCount), resources.getString(R.string.unit_nautical_mile));
+                } else {
+                    return new Pair<>(StringUtils.formatDecimal(distance.toFT(), decimalCount), resources.getString(R.string.unit_feet));
+                }
             default:
                 throw new RuntimeException("Not implemented");
         }

src/main/java/de/dennisguse/opentracks/data/models/Speed.java

@@ -93,6 +93,10 @@ public class Speed {
         return toKMH() * UnitConversions.KM_TO_MI;
     }
 
+    public double toKnots() {
+        return toKMH() * UnitConversions.KM_TO_NAUTICAL_MILE;
+    }
+
     public Duration toPace(UnitSystem unitSystem) {
         if (isZero()) {
             return Duration.ofSeconds(0);
@@ -106,6 +110,9 @@ public class Speed {
             case IMPERIAL:
                 distance *= UnitConversions.M_TO_MI;
                 break;
+            case NAUTICAL_IMPERIAL:
+                distance *= UnitConversions.M_TO_NAUTICAL_MILE;
+                break;
             default:
                 throw new RuntimeException("Not implemented");
         }
@@ -119,6 +126,8 @@ public class Speed {
                 return toKMH();
             case IMPERIAL:
                 return toMPH();
+            case NAUTICAL_IMPERIAL:
+                return toKnots();
             default:
                 throw new RuntimeException("Not implemented");
         }

src/main/java/de/dennisguse/opentracks/data/models/SpeedFormatter.java

@@ -47,6 +47,9 @@ public class SpeedFormatter {
             case IMPERIAL:
                 unitId = reportSpeedOrPace ? R.string.unit_mile_per_hour : R.string.unit_minute_per_mile;
                 break;
+            case NAUTICAL_IMPERIAL:
+                unitId = reportSpeedOrPace ? R.string.unit_knots : R.string.unit_minute_per_nautical_mile;
+                break;
             default:
                 throw new RuntimeException("Not implemented");
         }

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

@@ -46,7 +46,7 @@ public class TrackPoint {
     private Double longitude;
     private Distance horizontalAccuracy;
     private Distance verticalAccuracy;
-    private Altitude altitude;
+    private Altitude altitude; //TODO use Altitude.WGS84
     private Speed speed;
     private Float bearing;
     private Distance sensorDistance;
@@ -56,7 +56,7 @@ public class TrackPoint {
 
         SEGMENT_START_AUTOMATIC(-1), //Start of a segment due to too much distance from previous TrackPoint
         TRACKPOINT(0), //Just GPS data and may contain BLE sensor data
-        SENSORPOINT(2), //Just BLE sensor data; required to have speed and sensorDistance
+        SENSORPOINT(2), //Just BLE sensor data; may have speed and sensorDistance
 
         SEGMENT_END_MANUAL(1); //End of a segment
 

src/main/java/de/dennisguse/opentracks/data/models/UnitConversions.java

@@ -24,6 +24,7 @@ public class UnitConversions {
 
     // Time //TODO Use Duration
     // multiplication factor to convert seconds to milliseconds
+    @Deprecated
     public static final long S_TO_MS = 1000;
 
     // multiplication factor to convert milliseconds to seconds
@@ -53,6 +54,9 @@ public class UnitConversions {
     public static final double M_TO_MI = M_TO_KM * KM_TO_MI;
     // multiplication factor to convert meters to feet
     public static final double M_TO_FT = M_TO_MI * MI_TO_FT;
+    public static final double NAUTICAL_MILE_TO_M = 1852.0;
+    public static final double M_TO_NAUTICAL_MILE = 1 / NAUTICAL_MILE_TO_M;
+    public static final double KM_TO_NAUTICAL_MILE = 1000 * M_TO_NAUTICAL_MILE;
     // multiplication factor to convert meters per second to kilometers per hour
     public static final double MPS_TO_KMH = M_TO_KM / (S_TO_MIN * MIN_TO_HR);
     // multiplication factor to convert miles to km

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

@@ -39,6 +39,7 @@ import de.dennisguse.opentracks.data.tables.TracksColumns;
 import de.dennisguse.opentracks.databinding.ExportActivityBinding;
 import de.dennisguse.opentracks.io.file.ErrorListDialog;
 import de.dennisguse.opentracks.io.file.TrackFileFormat;
+import de.dennisguse.opentracks.settings.PreferencesUtils;
 import de.dennisguse.opentracks.util.ExportUtils;
 import de.dennisguse.opentracks.util.FileUtils;
 
@@ -234,7 +235,7 @@ public class ExportActivity extends FragmentActivity implements ExportServiceRes
      * @param conflictResolution conflict resolution to be applied if needed.
      */
     private void export(Track track, int conflictResolution) {
-        boolean fileExists = ExportUtils.isExportFileExists(track.getUuid(), trackFileFormat.getExtension(), directoryFiles);
+        boolean fileExists = exportFileExists(track);
 
         if (fileExists && conflictResolution == CONFLICT_NONE) {
             conflict(track);
@@ -250,6 +251,11 @@ public class ExportActivity extends FragmentActivity implements ExportServiceRes
         export(track, autoConflict);
     }
 
+    private boolean exportFileExists(Track track) {
+        String filename = PreferencesUtils.getTrackFileformatGenerator().format(track, trackFileFormat);
+        return directoryFiles.stream().anyMatch(filename::equals);
+    }
+
     private void setConflictVisibility(int visibility) {
         viewBinding.exportProgressAlertIcon.setVisibility(visibility);
         viewBinding.exportProgressAlertMsg.setVisibility(visibility);
@@ -315,7 +321,7 @@ public class ExportActivity extends FragmentActivity implements ExportServiceRes
     public void onExportSuccess(Track.Id trackId) {
         Track track = contentProviderUtils.getTrack(trackId);
 
-        if (ExportUtils.isExportFileExists(track.getUuid(), trackFileFormat.getExtension(), directoryFiles)) {
+        if (exportFileExists(track)) {
             trackExportOverwrittenCount++;
         } else {
             trackExportSuccessCount++;

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

@@ -146,13 +146,10 @@ public class GPXTrackExporter implements TrackExporter {
 
                 switch (trackPoint.getType()) {
                     case SEGMENT_START_MANUAL:
-                        if (wroteSegment) writeCloseSegment();
-                        writeOpenSegment();
-                        wroteSegment = true;
                         Log.i(TAG, "Exporting " + TrackPoint.Type.SEGMENT_START_MANUAL.name() + " is not supported.");
                         break;
                     case SEGMENT_END_MANUAL:
-                        writeCloseSegment();
+                        if (wroteSegment) writeCloseSegment();
                         wroteSegment = false;
                         Log.i(TAG, "Exporting " + TrackPoint.Type.SEGMENT_END_MANUAL.name() + " is not supported.");
                         break;

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

@@ -17,8 +17,8 @@ import androidx.documentfile.provider.DocumentFile;
 
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.io.file.exporter.ExportActivity;
-import de.dennisguse.opentracks.util.IntentUtils;
 import de.dennisguse.opentracks.settings.PreferencesUtils;
+import de.dennisguse.opentracks.util.IntentUtils;
 
 public abstract class DirectoryChooserActivity extends AppCompatActivity {
 

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

@@ -25,6 +25,7 @@ import de.dennisguse.opentracks.data.models.Marker;
 import de.dennisguse.opentracks.data.models.Speed;
 import de.dennisguse.opentracks.data.models.Track;
 import de.dennisguse.opentracks.data.models.TrackPoint;
+import de.dennisguse.opentracks.settings.PreferencesUtils;
 import de.dennisguse.opentracks.stats.TrackStatistics;
 import de.dennisguse.opentracks.stats.TrackStatisticsUpdater;
 import de.dennisguse.opentracks.ui.markers.MarkerUtils;
@@ -290,4 +291,5 @@ public class TrackImporter {
     public void cleanImport() {
         contentProviderUtils.deleteTracks(context, trackIds);
     }
+
 }

src/main/java/de/dennisguse/opentracks/publicapi/AbstractAPIActivity.java

@@ -34,7 +34,7 @@ public abstract class AbstractAPIActivity extends AppCompatActivity {
         if (PreferencesUtils.isPublicAPIenabled()) {
             Log.i(TAG, "Received and trying to execute requested action.");
             new TrackRecordingServiceConnection(serviceConnectedCallback)
-                    .startAndBind(this);
+                    .startAndBind(this, isStartServiceForeground());
         } else {
             Toast.makeText(this, getString(R.string.settings_public_api_disabled_toast), Toast.LENGTH_LONG).show();
             Log.w(TAG, "Public API is disabled; ignoring request.");
@@ -42,6 +42,10 @@ public abstract class AbstractAPIActivity extends AppCompatActivity {
         }
     }
 
+    protected boolean isStartServiceForeground() {
+        return false;
+    }
+
     protected abstract void execute(TrackRecordingService service);
 
     protected abstract boolean isPostExecuteStopService();

src/main/java/de/dennisguse/opentracks/publicapi/StartRecording.java

@@ -2,28 +2,64 @@ package de.dennisguse.opentracks.publicapi;
 
 import android.os.Bundle;
 
+import androidx.annotation.NonNull;
+
+import de.dennisguse.opentracks.data.ContentProviderUtils;
 import de.dennisguse.opentracks.data.models.Track;
 import de.dennisguse.opentracks.services.TrackRecordingService;
 import de.dennisguse.opentracks.settings.PreferencesUtils;
 import de.dennisguse.opentracks.util.IntentDashboardUtils;
+import de.dennisguse.opentracks.util.TrackUtils;
 
 public class StartRecording extends AbstractAPIActivity {
+
+    public static final String EXTRA_TRACK_NAME = "TRACK_NAME";
+    public static final String EXTRA_TRACK_CATEGORY = "TRACK_CATEGORY";
+    public static final String EXTRA_TRACK_DESCRIPTION = "TRACK_DESCRIPTION";
+
+    public static final String EXTRA_STATS_TARGET_PACKAGE = "STATS_TARGET_PACKAGE";
+    public static final String EXTRA_STATS_TARGET_CLASS = "STATS_TARGET_CLASS";
+
     private static final String TAG = StartRecording.class.getSimpleName();
 
     protected void execute(TrackRecordingService service) {
         Track.Id trackId = service.startNewTrack();
-        if ((trackId != null) && (PreferencesUtils.isPublicAPIDashboardEnabled())) {
+        if (trackId != null) {
             Bundle bundle = getIntent().getExtras();
             if (bundle != null) {
-                String targetPackage = bundle.getString("STATS_TARGET_PACKAGE", null);
+                updateTrackMetadata(trackId, bundle);
-                String targetClass = bundle.getString("STATS_TARGET_CLASS", null);
+
-                IntentDashboardUtils.startDashboard(this, true, targetPackage, targetClass, trackId);
+                if (PreferencesUtils.isPublicAPIDashboardEnabled()) {
+                    startDashboardAPI(trackId, bundle);
+                }
             }
         }
     }
 
+    private void updateTrackMetadata(@NonNull Track.Id trackId, @NonNull Bundle bundle) {
+        ContentProviderUtils contentProviderUtils = new ContentProviderUtils(this);
+        Track track = contentProviderUtils.getTrack(trackId);
+
+        TrackUtils.updateTrack(this, track, bundle.getString(EXTRA_TRACK_NAME, null),
+                bundle.getString(EXTRA_TRACK_CATEGORY, null), bundle.getString(EXTRA_TRACK_DESCRIPTION, null),
+                contentProviderUtils);
+    }
+
+    private void startDashboardAPI(@NonNull Track.Id trackId, @NonNull Bundle bundle) {
+        String targetPackage = bundle.getString(EXTRA_STATS_TARGET_PACKAGE, null);
+        String targetClass = bundle.getString(EXTRA_STATS_TARGET_CLASS, null);
+        if (targetClass != null && targetPackage != null) {
+            IntentDashboardUtils.startDashboard(this, true, targetPackage, targetClass, trackId);
+        }
+    }
+
     @Override
     protected boolean isPostExecuteStopService() {
         return false;
     }
+
+    @Override
+    protected boolean isStartServiceForeground() {
+        return true;
+    }
 }

src/main/java/de/dennisguse/opentracks/sensors/AltitudeSumManager.java

@@ -5,12 +5,15 @@ import android.hardware.Sensor;
 import android.hardware.SensorEvent;
 import android.hardware.SensorEventListener;
 import android.hardware.SensorManager;
+import android.os.Handler;
 import android.util.Log;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
 import androidx.annotation.VisibleForTesting;
 
+import java.util.concurrent.TimeUnit;
+
 import de.dennisguse.opentracks.data.models.TrackPoint;
 
 /**
@@ -29,7 +32,7 @@ public class AltitudeSumManager implements SensorEventListener {
     private Float altitudeGain_m;
     private Float altitudeLoss_m;
 
-    public void start(Context context) {
+    public void start(Context context, Handler handler) {
         SensorManager sensorManager = (SensorManager) context.getSystemService(Context.SENSOR_SERVICE);
 
         Sensor pressureSensor = sensorManager.getDefaultSensor(Sensor.TYPE_PRESSURE);
@@ -37,7 +40,7 @@ public class AltitudeSumManager implements SensorEventListener {
             Log.w(TAG, "No pressure sensor available.");
             isConnected = false;
         } else {
-            isConnected = sensorManager.registerListener(this, pressureSensor, SensorManager.SENSOR_DELAY_FASTEST);
+            isConnected = sensorManager.registerListener(this, pressureSensor, (int) TimeUnit.SECONDS.toMicros(5), handler);
         }
 
         lastAcceptedPressureValue_hPa = Float.NaN;

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

@@ -35,7 +35,7 @@ import de.dennisguse.opentracks.sensors.sensorData.SensorDataCycling;
 import de.dennisguse.opentracks.sensors.sensorData.SensorDataRunning;
 import de.dennisguse.opentracks.sensors.sensorData.SensorDataSet;
 import de.dennisguse.opentracks.settings.PreferencesUtils;
-import de.dennisguse.opentracks.util.PermissionUtils;
+import de.dennisguse.opentracks.util.PermissionRequester;
 
 /**
  * Bluetooth LE sensor manager: manages connections to Bluetooth LE sensors.
@@ -162,7 +162,7 @@ public class BluetoothRemoteSensorManager implements BluetoothConnectionManager.
         } else {
             connectionManager.disconnect();
         }
-        if (!PermissionUtils.hasBluetoothPermissions(context)) {
+        if (!PermissionRequester.BLUETOOTH.hasPermission(context)) {
             Log.w(TAG, "BLUETOOTH_SCAN and/or BLUETOOTH_CONNECT not granted; not connecting.");
         }
 

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

@@ -15,12 +15,14 @@ import androidx.lifecycle.LiveData;
 import androidx.lifecycle.MutableLiveData;
 
 import java.util.ArrayList;
+import java.util.List;
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.data.ContentProviderUtils;
 import de.dennisguse.opentracks.data.models.Track;
+import de.dennisguse.opentracks.settings.PreferencesUtils;
 
 public class TrackDeleteService extends Service {
 
@@ -31,7 +33,7 @@ public class TrackDeleteService extends Service {
 
     private final Binder binder = new Binder();
     private ExecutorService serviceExecutor;
-    private MutableLiveData<DeleteStatus> deleteResultObservable;
+    private MutableLiveData<DeletionFinishedStatus> deleteResultObservable;
     private NotificationManager notificationManager;
     private NotificationCompat.Builder notificationBuilder;
 
@@ -59,22 +61,18 @@ public class TrackDeleteService extends Service {
         return START_NOT_STICKY;
     }
 
-    private void deleteTracks(@NonNull ArrayList<Track.Id> trackIds) {
+    private void deleteTracks(@NonNull List<Track.Id> trackIds) {
-        sendResult(null,0, trackIds.size());
         serviceExecutor.execute(() -> {
             ContentProviderUtils contentProviderUtils = new ContentProviderUtils(this);
-            for (int i = 0; i < trackIds.size(); i++) {
+            contentProviderUtils.deleteTracks(this, trackIds);
-                updateNotification(i + 1, trackIds.size());
+            sendResult(trackIds);
-                contentProviderUtils.deleteTrack(this, trackIds.get(i));
-                sendResult(trackIds.get(i), i + 1, trackIds.size());
-            }
             stopSelf();
         });
     }
 
-    private void sendResult(Track.Id trackId, int deletes, int total) {
+    private void sendResult(List<Track.Id> trackIds) {
         if (deleteResultObservable != null) {
-            deleteResultObservable.postValue(new DeleteStatus(trackId, deletes, total));
+            deleteResultObservable.postValue(new DeletionFinishedStatus(trackIds));
         }
     }
 
@@ -83,7 +81,7 @@ public class TrackDeleteService extends Service {
         return binder;
     }
 
-    public LiveData<DeleteStatus> getDeletingStatusObservable() {
+    public LiveData<DeletionFinishedStatus> getDeletingStatusObservable() {
         return deleteResultObservable;
     }
 
@@ -106,25 +104,13 @@ public class TrackDeleteService extends Service {
         notificationBuilder = new NotificationCompat.Builder(this, CHANNEL_ID);
         notificationBuilder
                 .setContentTitle(this.getString(R.string.track_delete_progress_message))
-                .setContentText(this.getString(R.string.track_delete_progress, 0, tracksToDelete))
+                .setContentText(this.getString(R.string.track_delete_number_of_tracks, tracksToDelete))
                 .setSmallIcon(R.drawable.ic_logo_color_24dp)
-                .setProgress(tracksToDelete, 0, false);
+                .setProgress(0, 0, true);
 
         startForeground(NOTIFICATION_ID, notificationBuilder.build());
     }
 
-    /**
-     * Updates notification progress.
-     *
-     * @param progress number of tracks already deleted.
-     * @param total    total of tracks to be deleted.
-     */
-    private void updateNotification(int progress, int total) {
-        notificationBuilder.setProgress(total, progress, false);
-        notificationBuilder.setContentText(this.getString(R.string.track_delete_progress, progress, total));
-        notificationManager.notify(NOTIFICATION_ID, notificationBuilder.build());
-    }
-
     public class Binder extends android.os.Binder {
 
         private Binder() {
@@ -136,36 +122,25 @@ public class TrackDeleteService extends Service {
         }
     }
 
-    public static class DeleteStatus {
+    public static class DeletionFinishedStatus {
-        private final int progress;
+        private final List<Track.Id> trackIds;
-        private final int max;
-        private final Track.Id trackId;
 
         /**
-         * @param trackId  Track.Id just deleted if any.
+         * @param trackIds List of deleted Track.Ids.
-         * @param progress number of deletes.
-         * @param max      total of deletes to be done.
          */
-        private DeleteStatus(@Nullable Track.Id trackId, int progress, int max) {
+        private DeletionFinishedStatus(@Nullable List<Track.Id> trackIds) {
-            this.trackId = trackId;
+            this.trackIds = trackIds;
-            this.progress = progress;
-            this.max = max;
-        }
-
-        public boolean isFinished() {
-            return progress == max;
         }
 
         public boolean isDeleted(Track.Id trackId) {
-            return this.trackId != null && this.trackId.equals(trackId);
+            return this.trackIds != null && this.trackIds.contains(trackId);
         }
 
         @NonNull
         @Override
         public String toString() {
             return "DeleteStatus{" +
-                    "number of deletes=" + progress +
+                    "trackIds=" + trackIds +
-                    ", total=" + max +
                     '}';
         }
     }

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

@@ -10,6 +10,7 @@ import android.util.Pair;
 
 import androidx.annotation.NonNull;
 
+import java.time.Duration;
 import java.time.ZoneOffset;
 
 import de.dennisguse.opentracks.R;
@@ -180,8 +181,16 @@ class TrackRecordingManager implements SharedPreferences.OnSharedPreferenceChang
         }
 
         if (!trackPoint.hasLocation() && !trackPoint.hasSensorDistance()) {
-            Log.d(TAG, "Ignoring TrackPoint as it has no distance.");
+            Duration minStorageInterval = Duration.ofSeconds(10); // TODO Should be configurable.
-            return false;
+            boolean shouldStore = lastStoredTrackPoint.getTime().plus(minStorageInterval)
+                    .isBefore(trackPoint.getTime());
+            if (!shouldStore) {
+                Log.d(TAG, "Ignoring TrackPoint as it has no distance (and sensor data is not new enough).");
+                return false;
+            } else {
+                insertTrackPoint(trackPoint, true);
+                return true;
+            }
         }
 
         Distance distanceToLastStoredTrackPoint;

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

@@ -129,7 +129,8 @@ public class TrackRecordingService extends Service implements TrackPointCreator.
         trackRecordingManager = null;
 
         // Reverse order from onCreate
-        showNotification(false); //TODO Why?
+        stopForeground(true);
+
         notificationManager.stop();
         notificationManager = null;
 
@@ -205,7 +206,7 @@ public class TrackRecordingService extends Service implements TrackPointCreator.
     private void startSensors() {
         wakeLock = SystemUtils.acquireWakeLock(this, wakeLock);
         trackPointCreator.start(this, handler);
-        showNotification(true);
+        startForeground(TrackRecordingServiceNotificationManager.NOTIFICATION_ID, notificationManager.setGPSonlyStarted(this));
     }
 
     public void endCurrentTrack() {
@@ -247,7 +248,8 @@ public class TrackRecordingService extends Service implements TrackPointCreator.
         if (!isRecording()) return;
 
         trackPointCreator.stop();
-        showNotification(false);
+        stopForeground(true);
+        notificationManager.cancelNotification();
         wakeLock = SystemUtils.releaseWakeLock(wakeLock);
     }
 
@@ -273,19 +275,6 @@ public class TrackRecordingService extends Service implements TrackPointCreator.
         }
     }
 
-    private void showNotification(boolean isGpsStarted) {
-        if (isRecording()) {
-            startForeground(TrackRecordingServiceNotificationManager.NOTIFICATION_ID, notificationManager.setRecording(this, recordingStatus.getTrackId()));
-        }
-        if (!isRecording() && isGpsStarted) {
-            startForeground(TrackRecordingServiceNotificationManager.NOTIFICATION_ID, notificationManager.setGPSonlyStarted(this));
-        }
-        if (!isRecording() && !isGpsStarted) {
-            stopForeground(true);
-            notificationManager.cancelNotification();
-        }
-    }
-
     public Marker.Id insertMarker(String name, String category, String description, String photoUrl) {
         if (!isRecording()) {
             return null;

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

@@ -28,6 +28,7 @@ import android.widget.Toast;
 
 import androidx.annotation.NonNull;
 import androidx.annotation.Nullable;
+import androidx.core.content.ContextCompat;
 
 import de.dennisguse.opentracks.BuildConfig;
 import de.dennisguse.opentracks.R;
@@ -66,15 +67,21 @@ public class TrackRecordingServiceConnection implements ServiceConnection, Death
 
     /**
      * Starts and binds the service.
+     *
+     * @param foreground is the service expected to call `startForeground()`?
      */
-    public void startAndBind(Context context) {
+    public void startAndBind(Context context, boolean foreground) {
         if (trackRecordingService != null) {
             // Service is already started and bound.
             return;
         }
 
         Log.i(TAG, "Starting the service.");
-        context.startService(new Intent(context, TrackRecordingService.class));
+        if (foreground) {
+            ContextCompat.startForegroundService(context, new Intent(context, TrackRecordingService.class));
+        } else {
+            context.startService(new Intent(context, TrackRecordingService.class));
+        }
 
         startConnection(context);
     }
@@ -88,7 +95,7 @@ public class TrackRecordingServiceConnection implements ServiceConnection, Death
     @Deprecated
     public void startAndBindWithCallback(Context context) {
         if (trackRecordingService == null) {
-            startAndBind(context);
+            startAndBind(context, false);
             return;
         }
         if (callback != null) {

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

@@ -68,6 +68,7 @@ class TrackRecordingServiceNotificationManager implements SharedPreferences.OnSh
     }
 
     void stop() {
+        cancelNotification();
         PreferencesUtils.unregisterOnSharedPreferenceChangeListener(this);
     }
 

src/main/java/de/dennisguse/opentracks/services/announcement/VoiceAnnouncement.java

@@ -17,6 +17,7 @@
 package de.dennisguse.opentracks.services.announcement;
 
 import android.content.Context;
+import android.media.AudioAttributes;
 import android.media.AudioManager;
 import android.media.MediaPlayer;
 import android.speech.tts.TextToSpeech;
@@ -34,8 +35,8 @@ import de.dennisguse.opentracks.data.ContentProviderUtils;
 import de.dennisguse.opentracks.data.TrackPointIterator;
 import de.dennisguse.opentracks.data.models.Distance;
 import de.dennisguse.opentracks.data.models.Track;
+import de.dennisguse.opentracks.data.models.TrackPoint;
 import de.dennisguse.opentracks.settings.PreferencesUtils;
-import de.dennisguse.opentracks.settings.UnitSystem;
 import de.dennisguse.opentracks.stats.SensorStatistics;
 import de.dennisguse.opentracks.stats.TrackStatistics;
 import de.dennisguse.opentracks.ui.intervals.IntervalStatistics;
@@ -56,6 +57,10 @@ public class VoiceAnnouncement {
     private final AudioManager audioManager;
 
     private final ContentProviderUtils contentProviderUtils;
+    private TrackPoint.Id startTrackPointId = null;
+
+    private IntervalStatistics intervalStatistics;
+    private Distance intervalDistance;
 
     private final AudioManager.OnAudioFocusChangeListener audioFocusChangeListener = new AudioManager.OnAudioFocusChangeListener() {
         @Override
@@ -116,6 +121,8 @@ public class VoiceAnnouncement {
         this.context = context;
         audioManager = (AudioManager) context.getSystemService(Context.AUDIO_SERVICE);
         contentProviderUtils = new ContentProviderUtils(context);
+        intervalDistance = PreferencesUtils.getVoiceAnnouncementDistance();
+        intervalStatistics = new IntervalStatistics(intervalDistance);
     }
 
     public void start() {
@@ -132,7 +139,10 @@ public class VoiceAnnouncement {
             if (ttsFallback == null) {
                 Log.w(TAG, "MediaPlayer for ttsFallback could not be created.");
             } else {
-                ttsFallback.setAudioStreamType(AUDIO_STREAM);
+                ttsFallback.setAudioAttributes(
+                        new AudioAttributes.Builder()
+                                .setContentType(AudioAttributes.CONTENT_TYPE_SPEECH)
+                                .build());
                 ttsFallback.setLooping(false);
             }
         }
@@ -165,21 +175,22 @@ public class VoiceAnnouncement {
             return;
         }
 
+        Distance currentIntervalDistance = PreferencesUtils.getVoiceAnnouncementDistance();
+        if (currentIntervalDistance != intervalDistance) {
+            intervalStatistics = new IntervalStatistics(currentIntervalDistance);
+            intervalDistance = currentIntervalDistance;
+            startTrackPointId = null;
+        }
 
-        UnitSystem unitSystem = PreferencesUtils.getUnitSystem();
+        TrackPointIterator trackPointIterator = new TrackPointIterator(contentProviderUtils, track.getId(), startTrackPointId);
-        boolean isReportSpeed = PreferencesUtils.isReportSpeed(track.getCategory());
+        startTrackPointId = intervalStatistics.addTrackPoints(trackPointIterator);
-
-        //TODO Do not load all trackpoints for every announcement
-        TrackPointIterator trackPointIterator = contentProviderUtils.getTrackPointLocationIterator(track.getId(), null);
-        IntervalStatistics intervalStatistics = new IntervalStatistics(Distance.one(unitSystem));
-        intervalStatistics.addTrackPoints(trackPointIterator);
         IntervalStatistics.Interval lastInterval = intervalStatistics.getLastInterval();
         SensorStatistics sensorStatistics = null;
         if (track.getId() != null) {
             sensorStatistics = contentProviderUtils.getSensorStats(track.getId());
         }
 
-        Spannable announcement = VoiceAnnouncementUtils.getAnnouncement(context, track.getTrackStatistics(), unitSystem, isReportSpeed, lastInterval, sensorStatistics);
+        Spannable announcement = VoiceAnnouncementUtils.getAnnouncement(context, track.getTrackStatistics(), PreferencesUtils.getUnitSystem(), PreferencesUtils.isReportSpeed(track.getCategory()), lastInterval, sensorStatistics);
 
         if (announcement.length() > 0) {
             // We don't care about the utterance id. It is supplied here to force onUtteranceCompleted to be called.

src/main/java/de/dennisguse/opentracks/services/announcement/VoiceAnnouncementUtils.java

@@ -5,8 +5,8 @@ import static de.dennisguse.opentracks.settings.PreferencesUtils.shouldVoiceAnno
 import static de.dennisguse.opentracks.settings.PreferencesUtils.shouldVoiceAnnounceAverageSpeedPace;
 import static de.dennisguse.opentracks.settings.PreferencesUtils.shouldVoiceAnnounceLapHeartRate;
 import static de.dennisguse.opentracks.settings.PreferencesUtils.shouldVoiceAnnounceLapSpeedPace;
-import static de.dennisguse.opentracks.settings.PreferencesUtils.shouldVoiceAnnounceTotalDistance;
 import static de.dennisguse.opentracks.settings.PreferencesUtils.shouldVoiceAnnounceMovingTime;
+import static de.dennisguse.opentracks.settings.PreferencesUtils.shouldVoiceAnnounceTotalDistance;
 
 import android.content.Context;
 import android.text.Spannable;
@@ -57,6 +57,13 @@ class VoiceAnnouncementUtils {
                 unitDistanceTTS = "mile";
                 unitSpeedTTS = "mile per hour";
                 break;
+            case NAUTICAL_IMPERIAL:
+                perUnitStringId = R.string.voice_per_nautical_mile;
+                distanceId = R.plurals.voiceDistanceNauticalMiles;
+                speedId = R.plurals.voiceSpeedMKnots;
+                unitDistanceTTS = "nautical mile";
+                unitSpeedTTS = "knots";
+                break;
             default:
                 throw new RuntimeException("Not implemented");
         }
@@ -65,12 +72,9 @@ class VoiceAnnouncementUtils {
 
         if (shouldVoiceAnnounceTotalDistance()) {
             builder.append(context.getString(R.string.total_distance));
-            long distanceIntegerPart = (long) distanceInUnit;
-            // Extract the decimal part
-            String distanceFractionalPart = String.format("%.2f", (distanceInUnit - distanceIntegerPart)).substring(2);
             // Units should always be english singular for TTS.
             // See https://developer.android.com/reference/android/text/style/TtsSpan?hl=en#TYPE_MEASURE
-            appendDecimalUnit(builder, context.getResources().getQuantityString(distanceId, getQuantityCount(distanceInUnit), distanceInUnit), distanceIntegerPart, distanceFractionalPart, unitDistanceTTS);
+            appendDecimalUnit(builder, context.getResources().getQuantityString(distanceId, getQuantityCount(distanceInUnit), distanceInUnit), distanceInUnit, 2, unitDistanceTTS);
             // Punctuation helps introduce natural pauses in TTS
             builder.append(".");
         }
@@ -88,27 +92,17 @@ class VoiceAnnouncementUtils {
         if (isReportSpeed) {
             if (shouldVoiceAnnounceAverageSpeedPace()) {
                 double speedInUnit = distancePerTime.to(unitSystem);
-
                 builder.append(" ")
                         .append(context.getString(R.string.speed));
-                long speedIntegerPart = (long) speedInUnit;
+                appendDecimalUnit(builder, context.getResources().getQuantityString(speedId, getQuantityCount(speedInUnit), speedInUnit), speedInUnit, 1, unitSpeedTTS);
-                // Extract the decimal part
-                String speedFractionalPart = String.format("%.1f", (speedInUnit - speedIntegerPart)).substring(2);
-                appendDecimalUnit(builder, context.getResources().getQuantityString(speedId, getQuantityCount(speedInUnit), speedInUnit), speedIntegerPart, speedFractionalPart, unitSpeedTTS);
                 builder.append(".");
             }
-
             if (shouldVoiceAnnounceLapSpeedPace() && currentDistancePerTime != null) {
                 double currentDistancePerTimeInUnit = currentDistancePerTime.to(unitSystem);
-
                 if (currentDistancePerTimeInUnit > 0) {
-
                     builder.append(" ")
                             .append(context.getString(R.string.lap_speed));
-                    long currentDistanceIntegerPart = (long) currentDistancePerTimeInUnit;
+                    appendDecimalUnit(builder, context.getResources().getQuantityString(speedId, getQuantityCount(currentDistancePerTimeInUnit), currentDistancePerTimeInUnit), currentDistancePerTimeInUnit, 1, unitSpeedTTS);
-                    // Extract the decimal part
-                    String currentDistanceFractionalPart = String.format("%.1f", (currentDistancePerTimeInUnit - currentDistanceIntegerPart)).substring(2);
-                    appendDecimalUnit(builder, context.getResources().getQuantityString(speedId, getQuantityCount(currentDistancePerTimeInUnit), currentDistancePerTimeInUnit), currentDistanceIntegerPart, currentDistanceFractionalPart, unitSpeedTTS);
                     builder.append(".");
                 }
             }
@@ -164,26 +158,34 @@ class VoiceAnnouncementUtils {
         int seconds = (int) (duration.getSeconds() % 60);
 
         if (hours > 0) {
-            appendDecimalUnit(builder, context.getResources().getQuantityString(R.plurals.voiceHours, hours, hours), hours, null, "hour");
+            appendDecimalUnit(builder, context.getResources().getQuantityString(R.plurals.voiceHours, hours, hours), hours, 0, "hour");
         }
         if (minutes > 0) {
-            appendDecimalUnit(builder, context.getResources().getQuantityString(R.plurals.voiceMinutes, minutes, minutes), minutes, null, "minute");
+            appendDecimalUnit(builder, context.getResources().getQuantityString(R.plurals.voiceMinutes, minutes, minutes), minutes, 0, "minute");
         }
         if (seconds > 0 || duration.isZero()) {
-            appendDecimalUnit(builder, context.getResources().getQuantityString(R.plurals.voiceSeconds, seconds, seconds), seconds, null, "second");
+            appendDecimalUnit(builder, context.getResources().getQuantityString(R.plurals.voiceSeconds, seconds, seconds), seconds, 0, "second");
         }
     }
 
     /**
      * Speaks as: 98.14 [UNIT] - ninety eight point one four [UNIT with correct plural form]
+     *
+     * @param number The number to speak
+     * @param precision The number of decimal places to announce
      */
-    private static void appendDecimalUnit(@NonNull SpannableStringBuilder builder, @NonNull String localizedText, long integerPart, @Nullable String fractionalPart, @NonNull String unit) {
+    private static void appendDecimalUnit(@NonNull SpannableStringBuilder builder, @NonNull String localizedText, double number, int precision, @NonNull String unit) {
         TtsSpan.MeasureBuilder measureBuilder = new TtsSpan.MeasureBuilder()
                 .setUnit(unit);
 
-        if (fractionalPart == null) {
+        if (precision == 0) {
-            measureBuilder.setNumber(integerPart);
+            measureBuilder.setNumber((long)number);
         } else {
+            // Round before extracting integral and decimal parts
+            double roundedNumber = Math.round(Math.pow(10, precision) * number) / Math.pow(10.0, precision);
+            long integerPart = (long) roundedNumber;
+            // Extract the decimal part
+            String fractionalPart = String.format("%." + precision + "f", (roundedNumber - integerPart)).substring(2);
             measureBuilder.setIntegerPart(integerPart)
                     .setFractionalPart(fractionalPart);
         }

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

@@ -19,7 +19,7 @@ import de.dennisguse.opentracks.data.models.Distance;
 import de.dennisguse.opentracks.data.models.TrackPoint;
 import de.dennisguse.opentracks.settings.PreferencesUtils;
 import de.dennisguse.opentracks.util.LocationUtils;
-import de.dennisguse.opentracks.util.PermissionUtils;
+import de.dennisguse.opentracks.util.PermissionRequester;
 
 @VisibleForTesting(otherwise = VisibleForTesting.PACKAGE_PRIVATE)
 public class GPSHandler implements LocationListener, GpsStatus.GpsStatusListener, SharedPreferences.OnSharedPreferenceChangeListener {
@@ -54,7 +54,7 @@ public class GPSHandler implements LocationListener, GpsStatus.GpsStatusListener
     //TODO upgrade to AGP7.0.0/API31 started complaining about removeUpdates.
     public void onStop() {
         if (locationManager != null && context != null) {
-            if (PermissionUtils.hasGPSPermission(context)) {
+            if (PermissionRequester.GPS.hasPermission(context)) {
                 locationManager.removeUpdates(this);
             }
             locationManager = null;
@@ -152,7 +152,7 @@ public class GPSHandler implements LocationListener, GpsStatus.GpsStatusListener
             Log.e(TAG, "Not started.");
             return;
         }
-        if (PermissionUtils.hasGPSPermission(context)) {
+        if (PermissionRequester.GPS.hasPermission(context)) {
             try {
                 locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, gpsInterval.toMillis(), 0, this);
             } catch (SecurityException e) {

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

@@ -23,7 +23,7 @@ class GpsStatus {
     private static final String TAG = GpsStatus.class.getSimpleName();
 
     // The duration that GpsStatus waits from minimal interval to consider GPS lost.
-    private static final Duration SIGNAL_LOST_THRESHOLD = Duration.ofSeconds(10);
+    private static final Duration SIGNAL_LOST_THRESHOLD = Duration.ofSeconds(30);
 
     private Distance thresholdHorizontalAccuracy;
     // Threshold for time without points.

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

@@ -58,7 +58,7 @@ public class TrackPointCreator implements BluetoothRemoteSensorManager.SensorDat
         altitudeSumManager = new AltitudeSumManager();
 
         remoteSensorManager.start();
-        altitudeSumManager.start(context);
+        altitudeSumManager.start(context, handler);
 
     }
 

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

@@ -74,6 +74,7 @@ public class DefaultsSettingsFragment extends PreferenceFragmentCompat implement
                 entriesId = R.array.stats_rate_metric_options;
                 break;
             case IMPERIAL:
+            case NAUTICAL_IMPERIAL:
                 entriesId = R.array.stats_rate_imperial_options;
                 break;
             default:

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

@@ -8,9 +8,6 @@ import androidx.preference.Preference;
 import androidx.preference.PreferenceFragmentCompat;
 
 import de.dennisguse.opentracks.R;
-import de.dennisguse.opentracks.services.RecordingStatus;
-import de.dennisguse.opentracks.services.TrackRecordingService;
-import de.dennisguse.opentracks.services.TrackRecordingServiceConnection;
 
 public class MainSettingsFragment extends PreferenceFragmentCompat {
 

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

@@ -214,7 +214,6 @@ public class PreferencesUtils {
     //TODO Check if actually needed or can be superseeded by a flexible default in getUnit()
     public static void applyDefaultUnit() {
         if (getString(R.string.stats_units_key, "").equals("")) {
-
             if (!Locale.US.equals(Locale.getDefault())) {
                 setUnit(UnitSystem.METRIC);
             } else {
@@ -324,7 +323,7 @@ public class PreferencesUtils {
         UnitSystem unitSystem = getUnitSystem();
 
         DistanceFormatter formatter = DistanceFormatter.Builder()
-                .setDecimalCount(0)
+                .setDecimalCount(1)
                 .setUnit(unitSystem)
                 .build(resources);
         for (int i = 0; i < values.length; i++) {
@@ -418,7 +417,7 @@ public class PreferencesUtils {
 
         DistanceFormatter formatter = DistanceFormatter.Builder()
                 .setUnit(unitSystem)
-                .setDecimalCount(0)
+                .setDecimalCount(1)
                 .build(resources);
         for (int i = 0; i < entryValues.length; i++) {
             int value = Integer.parseInt(entryValues[i]);
@@ -434,6 +433,7 @@ public class PreferencesUtils {
                     }
                     break;
                 case IMPERIAL:
+                case NAUTICAL_IMPERIAL:
                     if (value == recordingDistanceIntervalDefault) {
                         entries[i] = resources.getString(R.string.value_integer_feet_recommended, (int) distance.toFT());
                     } else {
@@ -461,7 +461,7 @@ public class PreferencesUtils {
         UnitSystem unitSystem = getUnitSystem();
 
         DistanceFormatter formatter = DistanceFormatter.Builder()
-                .setDecimalCount(0)
+                .setDecimalCount(1)
                 .setUnit(unitSystem)
                 .build(resources);
         for (int i = 0; i < entryValues.length; i++) {
@@ -478,6 +478,7 @@ public class PreferencesUtils {
                     }
                     break;
                 case IMPERIAL:
+                case NAUTICAL_IMPERIAL:
                     if (value == maxRecordingDistanceDefault) {
                         entries[i] = resources.getString(R.string.value_integer_feet_recommended, (int) distance.toFT());
                     } else {
@@ -533,7 +534,7 @@ public class PreferencesUtils {
         UnitSystem unitSystem = getUnitSystem();
 
         DistanceFormatter formatter = DistanceFormatter.Builder()
-                .setDecimalCount(0)
+                .setDecimalCount(1)
                 .setUnit(unitSystem)
                 .build(resources);
 
@@ -555,6 +556,7 @@ public class PreferencesUtils {
                     }
                     break;
                 case IMPERIAL:
+                case NAUTICAL_IMPERIAL:
                     if (value == recordingGPSAccuracyDefault) {
                         entries[i] = resources.getString(R.string.value_integer_feet_recommended, (int) distance.toFT());
                     } else if (value == recordingGPSAccuracyExcellent) {
@@ -606,6 +608,14 @@ public class PreferencesUtils {
                         entries[i] = resources.getString(R.string.value_float_mile_hour, valueMPH);
                     }
                     break;
+                case NAUTICAL_IMPERIAL:
+                    double valueKnots = Speed.ofKMH(value).toKnots();
+                    if (value == idleSpeedDefault) {
+                        entries[i] = resources.getString(R.string.value_float_knots_recommended, valueKnots);
+                    } else {
+                        entries[i] = resources.getString(R.string.value_float_knots, valueKnots);
+                    }
+                    break;
                 default:
                     throw new RuntimeException("Not implemented");
             }
@@ -816,4 +826,17 @@ public class PreferencesUtils {
         return getString(R.string.show_on_map_format_key, IntentDashboardUtils.PREFERENCE_ID_ASK);
     }
 
+    public static int getTotalRowsDeleted() {
+        return getInt(R.string.total_rows_deleted_key, 0);
+    }
+
+    public static void addTotalRowsDeleted(final int totalRowsDeletedToAdd) {
+        int newTotalRowsDeleted = getTotalRowsDeleted() + totalRowsDeletedToAdd;
+        setInt(R.string.total_rows_deleted_key, newTotalRowsDeleted);
+    }
+
+    public static void resetTotalRowsDeleted() {
+        setInt(R.string.total_rows_deleted_key, 0);
+    }
+
 }

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

@@ -4,6 +4,7 @@ import android.os.Bundle;
 
 import androidx.preference.PreferenceFragmentCompat;
 
+import de.dennisguse.opentracks.BuildConfig;
 import de.dennisguse.opentracks.R;
 
 public class PublicAPISettingsFragment extends PreferenceFragmentCompat {
@@ -17,5 +18,7 @@ public class PublicAPISettingsFragment extends PreferenceFragmentCompat {
     public void onStart() {
         super.onStart();
         ((SettingsActivity) getActivity()).getSupportActionBar().setTitle(R.string.settings_api_title);
+        findPreference(getString(R.string.publicapi_package_key))
+                .setSummary(BuildConfig.APPLICATION_ID);
     }
 }

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

@@ -11,7 +11,6 @@ import androidx.preference.PreferenceFragmentCompat;
 import de.dennisguse.opentracks.AbstractActivity;
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.databinding.SettingsBinding;
-import de.dennisguse.opentracks.databinding.TrackRecordedBinding;
 import de.dennisguse.opentracks.fragments.ChooseActivityTypeDialogFragment;
 
 public class SettingsActivity extends AbstractActivity implements ChooseActivityTypeDialogFragment.ChooseActivityTypeCaller {

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

@@ -4,7 +4,8 @@ import de.dennisguse.opentracks.R;
 
 public enum UnitSystem {
     METRIC(R.string.stats_units_metric),
-    IMPERIAL(R.string.stats_units_imperial);
+    IMPERIAL(R.string.stats_units_imperial),
+    NAUTICAL_IMPERIAL(R.string.stats_units_nautical); // Nautical miles with feet
 
     private final int preferenceIdentifier;
 

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

@@ -29,7 +29,7 @@ import java.util.stream.Collectors;
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.sensors.BluetoothUtils;
 import de.dennisguse.opentracks.settings.PreferencesUtils;
-import de.dennisguse.opentracks.util.PermissionUtils;
+import de.dennisguse.opentracks.util.PermissionRequester;
 
 /**
  * Preference to select a discoverable Bluetooth LE device.
@@ -145,20 +145,18 @@ public abstract class BluetoothLeSensorPreference extends DialogPreference {
             bluetoothIcon = AnimatedVectorDrawableCompat.create(getContext(), R.drawable.ic_bluetooth_searching_animated_24dp);
             bluetoothIcon.start();
 
-            if (!PermissionUtils.hasBluetoothPermissions(getContext())) {
+            PermissionRequester.BLUETOOTH.requestPermissionsIfNeeded(getContext(), this,
-                PermissionUtils.requestBluetoothPermission(this,
+                    this::startBluetoothScan,
-                        this::startBluetoothScan,
+                    (requester) -> {
-                        () -> {
+                        if (requester.shouldShowRequestPermissionRationale(this)) {
-                            if (PermissionUtils.shouldShowRequestPermissionRationaleBluetooth(this)) {
+                            Toast.makeText(getContext(), R.string.permission_bluetooth_failed_rejected, Toast.LENGTH_LONG).show();
-                                Toast.makeText(getContext(), R.string.permission_bluetooth_failed_rejected, Toast.LENGTH_LONG).show();
+                        } else {
-                            } else {
+                            Toast.makeText(getContext(), R.string.permission_bluetooth_failed, Toast.LENGTH_SHORT).show();
-                                Toast.makeText(getContext(), R.string.permission_bluetooth_failed, Toast.LENGTH_SHORT).show();
+                        }
-                            }
+                        dismiss();
-                            dismiss();
+                    });
-                        });
+
-            } else {
+            startBluetoothScan();
-                startBluetoothScan();
-            }
         }
 
         private void startBluetoothScan() {

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

@@ -1,32 +0,0 @@
-package de.dennisguse.opentracks.stats;
-
-import androidx.annotation.Nullable;
-
-import de.dennisguse.opentracks.data.models.Altitude;
-
-public class AltitudeRingBuffer extends RingBuffer<Altitude> {
-
-    private Altitude firstAltitude;
-
-    AltitudeRingBuffer(int size) {
-        super(size);
-    }
-
-    AltitudeRingBuffer(RingBuffer<Altitude> toCopy) {
-        super(toCopy);
-    }
-
-    @Nullable
-    @Override
-    protected Number from(Altitude object) {
-        if (firstAltitude == null) {
-            firstAltitude = object;
-        }
-        return object.toM();
-    }
-
-    @Override
-    protected Altitude to(double object) {
-        return firstAltitude.replace(object);
-    }
-}

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

@@ -1,138 +0,0 @@
-/*
- * Copyright 2009 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.stats;
-
-import androidx.annotation.NonNull;
-import androidx.annotation.Nullable;
-
-import java.util.ArrayList;
-
-/**
- * This class maintains a ring buffer of doubles.
- * This buffer is a convenient class for storing a series of doubles and calculating information about them.
- * This is a FIFO buffer.
- *
- * @author Sandor Dornbush
- */
-abstract class RingBuffer<T> {
-
-    private final ArrayList<T> buffer;
-
-    // The location that the next write will occur at.
-    private int index;
-
-    // True if the buffer is full
-    private boolean isFull;
-
-    /**
-     * Creates a buffer with a certain size.
-     *
-     * @param size the size
-     */
-    RingBuffer(int size) {
-        if (size < 1) {
-            throw new IllegalArgumentException("The buffer size must be greater than 1.");
-        }
-
-        buffer = new ArrayList<T>(size);
-        reset();
-    }
-
-    RingBuffer(RingBuffer<T> toCopy) {
-        this.buffer = new ArrayList<>(toCopy.buffer);
-        this.index = toCopy.index;
-        this.isFull = toCopy.isFull;
-    }
-
-    /**
-     * Resets the buffer.
-     */
-    public void reset() {
-        index = 0;
-        isFull = false;
-    }
-
-    /**
-     * Returns true if the buffer is full.
-     */
-    boolean isFull() {
-        return isFull;
-    }
-
-    /**
-     * Gets the average of the buffer.
-     */
-    public T getAverage() {
-        int numberOfEntries = isFull ? buffer.size() : index;
-        if (numberOfEntries == 0) {
-            return null;
-        }
-        Double sum = null;
-        int numberOfUsedEntries = 0;
-        for (int i = 0; i < numberOfEntries; i++) {
-            Number value = from(buffer.get(i));
-            if (value != null) {
-                if (sum == null) {
-                    sum = 0.0;
-                }
-                sum += value.doubleValue();
-                numberOfUsedEntries++;
-            }
-        }
-        if (sum == null) {
-            return null;
-        } else {
-            return to(sum / numberOfUsedEntries);
-        }
-    }
-
-    @Nullable
-    protected abstract Number from(T object);
-
-    protected abstract T to(double object);
-
-    /**
-     * Adds a double to the buffer.
-     * If the buffer is full the oldest element is overwritten.
-     *
-     * @param value the double to add
-     */
-    public void setNext(T value) {
-        if (index == buffer.size()) {
-            index = 0;
-        }
-        buffer.add(index, value);
-        index++;
-        if (index == buffer.size()) {
-            isFull = true;
-        }
-    }
-
-    @NonNull
-    @Override
-    public String toString() {
-        StringBuilder builder = new StringBuilder("Full: ");
-        builder.append(isFull);
-        builder.append("\n");
-        for (int i = 0; i < buffer.size(); i++) {
-            builder.append((i == index) ? "<<" : "[");
-            builder.append(buffer.get(i));
-            builder.append((i == index) ? ">> " : "] ");
-        }
-        return builder.toString();
-    }
-}

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

@@ -1,27 +0,0 @@
-package de.dennisguse.opentracks.stats;
-
-import androidx.annotation.Nullable;
-
-import de.dennisguse.opentracks.data.models.Speed;
-
-public class SpeedRingBuffer extends RingBuffer<Speed> {
-
-    SpeedRingBuffer(int size) {
-        super(size);
-    }
-
-    SpeedRingBuffer(RingBuffer<Speed> toCopy) {
-        super(toCopy);
-    }
-
-    @Nullable
-    @Override
-    protected Number from(Speed object) {
-        return object.toMPS();
-    }
-
-    @Override
-    protected Speed to(double object) {
-        return Speed.of(object);
-    }
-}

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

@@ -19,16 +19,15 @@ package de.dennisguse.opentracks.stats;
 import android.util.Log;
 
 import androidx.annotation.NonNull;
-import androidx.annotation.VisibleForTesting;
 
 import java.time.Duration;
 import java.util.List;
 
-import de.dennisguse.opentracks.data.models.Altitude;
 import de.dennisguse.opentracks.data.models.Distance;
 import de.dennisguse.opentracks.data.models.HeartRate;
 import de.dennisguse.opentracks.data.models.Speed;
 import de.dennisguse.opentracks.data.models.TrackPoint;
+import de.dennisguse.opentracks.data.models.UnitConversions;
 
 /**
  * Updater for {@link TrackStatistics}.
@@ -41,30 +40,15 @@ import de.dennisguse.opentracks.data.models.TrackPoint;
  */
 public class TrackStatisticsUpdater {
 
-    /**
-     * The number of altitude readings to smooth to get a somewhat accurate signal.
-     */
-    @VisibleForTesting
-    private static final int ALTITUDE_SMOOTHING_FACTOR = 25;
-
-    /**
-     * The number of speed reading to smooth to get a somewhat accurate signal.
-     */
-    @VisibleForTesting
-    private static final int SPEED_SMOOTHING_FACTOR = 25;
-
     private static final String TAG = TrackStatisticsUpdater.class.getSimpleName();
     /**
      * Ignore any acceleration faster than this.
      * Will ignore any speeds that imply acceleration greater than 2g's
-     * 2g = 19.6 m/s^2 = 0.0002 m/ms^2 = 0.02 m/(m*ms)
      */
-    private static final double MAX_ACCELERATION = 0.02;
+    private static final double SPEED_MAX_ACCELERATION = 2 * 9.81;
 
     private final TrackStatistics trackStatistics;
 
-    private final AltitudeRingBuffer altitudeBuffer;
-    private final SpeedRingBuffer speedBuffer;
     private float averageHeartRateBPM;
     private Duration totalHeartRateDuration = Duration.ZERO;
 
@@ -86,8 +70,6 @@ public class TrackStatisticsUpdater {
         this.trackStatistics = trackStatistics;
         this.currentSegment = new TrackStatistics();
 
-        altitudeBuffer = new AltitudeRingBuffer(ALTITUDE_SMOOTHING_FACTOR);
-        speedBuffer = new SpeedRingBuffer(SPEED_SMOOTHING_FACTOR);
         resetAverageHeartRate();
     }
 
@@ -95,9 +77,6 @@ public class TrackStatisticsUpdater {
         this.currentSegment = new TrackStatistics(toCopy.currentSegment);
         this.trackStatistics = new TrackStatistics(toCopy.trackStatistics);
 
-        this.altitudeBuffer = new AltitudeRingBuffer(toCopy.altitudeBuffer);
-        this.speedBuffer = new SpeedRingBuffer(toCopy.speedBuffer);
-
         this.lastTrackPoint = toCopy.lastTrackPoint;
         resetAverageHeartRate();
     }
@@ -140,11 +119,7 @@ public class TrackStatisticsUpdater {
 
         //Update absolute (GPS-based) altitude
         if (trackPoint.hasAltitude()) {
-            // Update altitude using the smoothed average
+            currentSegment.updateAltitudeExtremities(trackPoint.getAltitude());
-            altitudeBuffer.setNext(trackPoint.getAltitude());
-            Altitude newAverage = altitudeBuffer.getAverage();
-
-            currentSegment.updateAltitudeExtremities(newAverage);
         }
 
         // Update heart rate
@@ -178,11 +153,8 @@ public class TrackStatisticsUpdater {
 
             // Update max speed
             updateSpeed(trackPoint, lastTrackPoint);
-        } else {
-            speedBuffer.reset();
         }
 
-
         if (trackPoint.isSegmentEnd()) {
             reset(trackPoint);
             return;
@@ -198,8 +170,6 @@ public class TrackStatisticsUpdater {
         currentSegment.reset(trackPoint.getTime());
 
         lastTrackPoint = null;
-        altitudeBuffer.reset();
-        speedBuffer.reset();
         resetAverageHeartRate();
     }
 
@@ -208,30 +178,14 @@ public class TrackStatisticsUpdater {
         totalHeartRateDuration = Duration.ZERO;
     }
 
-    /**
-     * Gets the smoothed altitude over several readings.
-     * The altitude readings is noisy so the smoothed altitude is better than the raw altitude for many tasks.
-     */
-    public Altitude getSmoothedAltitude() {
-        return altitudeBuffer.getAverage();
-    }
-
-    public Speed getSmoothedSpeed() {
-        return speedBuffer.getAverage();
-    }
-
     /**
      * Updates a speed reading while assuming the user is moving.
      */
-    @VisibleForTesting
     private void updateSpeed(@NonNull TrackPoint trackPoint, @NonNull TrackPoint lastTrackPoint) {
-        if (!trackPoint.isMoving()) {
+        if (isValidSpeed(trackPoint, lastTrackPoint)) {
-            speedBuffer.reset();
+            Speed currentSpeed = trackPoint.getSpeed();
-        } else if (isValidSpeed(trackPoint, lastTrackPoint)) {
+            if (currentSpeed.greaterThan(currentSegment.getMaxSpeed())) {
-            speedBuffer.setNext(trackPoint.getSpeed());
+                currentSegment.setMaxSpeed(currentSpeed);
-            Speed average = speedBuffer.getAverage();
-            if (average.greaterThan(currentSegment.getMaxSpeed())) {
-                currentSegment.setMaxSpeed(average);
             }
         } else {
             Log.d(TAG, "Invalid speed. speed: " + trackPoint.getSpeed() + " lastLocationSpeed: " + lastTrackPoint.getSpeed());
@@ -239,30 +193,13 @@ public class TrackStatisticsUpdater {
     }
 
     private boolean isValidSpeed(@NonNull TrackPoint trackPoint, @NonNull TrackPoint lastTrackPoint) {
-        // There are a lot of noisy speed readings. Do the cheapest checks first, most expensive last.
+        // See if the speed seems physically likely. Ignore any speeds that imply acceleration greater than 2g.
-        if (trackPoint.getSpeed().isZero()) {
-            return false;
-        }
-
         Duration timeDifference = Duration.between(lastTrackPoint.getTime(), trackPoint.getTime());
-        Speed maxAcceleration = Speed.of(MAX_ACCELERATION * timeDifference.toMillis());
+        Speed maxSpeedDifference = Speed.of(Distance.of(SPEED_MAX_ACCELERATION), Duration.ofMillis(1000))
-        {
+                .mul(timeDifference.toMillis() / UnitConversions.S_TO_MS);
-            // See if the speed seems physically likely. Ignore any speeds that imply acceleration greater than 2g.
-            Speed speedDifference = Speed.absDiff(lastTrackPoint.getSpeed(), trackPoint.getSpeed());
-            if (speedDifference.greaterThan(maxAcceleration)) {
-                return false;
-            }
-        }
 
-        // Only check if the speed buffer is full. Check that the speed is less than 10X the smoothed average and the speed difference doesn't imply 2g acceleration.
+        Speed speedDifference = Speed.absDiff(lastTrackPoint.getSpeed(), trackPoint.getSpeed());
-        if (speedBuffer.isFull()) {
+        return speedDifference.lessThan(maxSpeedDifference);
-            Speed average = speedBuffer.getAverage();
-            Speed speedDifference = Speed.absDiff(average, trackPoint.getSpeed());
-
-            return trackPoint.getSpeed().lessThan(average.mul(10)) && speedDifference.lessThan(maxAcceleration);
-        }
-
-        return true;
     }
 
     @NonNull

src/main/java/de/dennisguse/opentracks/ui/aggregatedStatistics/FilterDialogFragment.java

@@ -5,7 +5,6 @@ import android.content.Context;
 import android.os.Bundle;
 import android.os.Parcel;
 import android.os.Parcelable;
-import android.util.Log;
 import android.view.LayoutInflater;
 import android.view.View;
 import android.widget.DatePicker;

src/main/java/de/dennisguse/opentracks/ui/intervals/IntervalStatistics.java

@@ -49,8 +49,7 @@ public class IntervalStatistics {
                 interval.add(trackStatisticsUpdater.getTrackStatistics(), trackPoint);
 
                 double adjustFactor = distanceInterval.dividedBy(interval.distance);
-                Interval adjustedInterval = new Interval(interval);
+                Interval adjustedInterval = new Interval(interval, adjustFactor);
-                adjustedInterval.adjust(adjustFactor);
 
                 intervalList.set(intervalList.size() - 1, adjustedInterval);
 
@@ -116,7 +115,6 @@ public class IntervalStatistics {
         public Interval(Interval i, double adjustFactor) {
             distance = i.distance.multipliedBy(adjustFactor);
             time = Duration.ofMillis((long) (i.time.toMillis() * adjustFactor));
-            time = i.time;
             gain_m = i.gain_m;
             loss_m = i.loss_m;
             avgHeartRate = i.avgHeartRate;
@@ -130,11 +128,6 @@ public class IntervalStatistics {
             avgHeartRate = i.avgHeartRate;
         }
 
-        private void adjust(double adjustFactor) {
-            distance = distance.multipliedBy(adjustFactor);
-            time = Duration.ofMillis((long) (time.toMillis() * adjustFactor));
-        }
-
         public Distance getDistance() {
             return distance;
         }

src/main/java/de/dennisguse/opentracks/ui/intervals/IntervalsFragment.java

@@ -107,17 +107,17 @@ public class IntervalsFragment extends Fragment {
         // TODO handle empty view: before we did viewBinding.intervalList.setEmptyView(viewBinding.intervalListEmptyView);
         viewBinding.intervalList.setAdapter(adapter);
 
-        final DistanceFormatter formatter = DistanceFormatter.Builder()
-                .setDecimalCount(0)
-                .setUnit(unitSystem)
-                .build(getContext());
-
         intervalsAdapter = new ArrayAdapter<>(getContext(), android.R.layout.simple_spinner_dropdown_item, IntervalStatisticsModel.IntervalOption.values()) {
             @NonNull
             @Override
             public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
                 TextView v = (TextView) super.getView(position, convertView, parent);
 
+                DistanceFormatter formatter = DistanceFormatter.Builder()
+                        .setDecimalCount(0)
+                        .setUnit(unitSystem)
+                        .build(getContext());
+
                 IntervalStatisticsModel.IntervalOption option = getItem(position);
                 String stringValue = formatter.formatDistance(option.getDistance(unitSystem));
                 v.setText(stringValue);

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

@@ -21,8 +21,10 @@ import android.content.pm.PackageManager;
 import android.graphics.Bitmap;
 import android.graphics.BitmapFactory;
 import android.net.Uri;
+import android.os.Build;
 import android.os.Bundle;
 import android.os.ParcelFileDescriptor;
+import android.provider.MediaStore;
 import android.util.Log;
 import android.util.Pair;
 import android.view.Menu;
@@ -55,6 +57,8 @@ public class MarkerEditActivity extends AbstractActivity {
     public static final String EXTRA_TRACK_ID = "track_id";
     public static final String EXTRA_MARKER_ID = "marker_id";
 
+    private static final String CAMERA_PHOTO_URI_KEY = "camera_photo_uri_key";
+
     private static final String TAG = MarkerEditActivity.class.getSimpleName();
     private Track.Id trackId;
     private Marker marker;
@@ -86,6 +90,10 @@ public class MarkerEditActivity extends AbstractActivity {
         trackId = getIntent().getParcelableExtra(EXTRA_TRACK_ID);
         Marker.Id markerId = getIntent().getParcelableExtra(EXTRA_MARKER_ID);
 
+        if (savedInstanceState != null) {
+            cameraPhotoUri = Uri.parse(savedInstanceState.getString(CAMERA_PHOTO_URI_KEY, ""));
+        }
+
         hasCamera = getPackageManager().hasSystemFeature(PackageManager.FEATURE_CAMERA_ANY);
 
         // Setup UI elements
@@ -165,6 +173,14 @@ public class MarkerEditActivity extends AbstractActivity {
         takePictureFromCamera = null;
     }
 
+    @Override
+    protected void onSaveInstanceState(@NonNull Bundle outState) {
+        super.onSaveInstanceState(outState);
+        if (cameraPhotoUri != null) {
+            outState.putString(CAMERA_PHOTO_URI_KEY, cameraPhotoUri.toString());
+        }
+    }
+
     @Override
     public boolean onCreateOptionsMenu(Menu menu) {
         getMenuInflater().inflate(R.menu.marker_edit, menu);
@@ -232,7 +248,13 @@ public class MarkerEditActivity extends AbstractActivity {
     }
 
     private void createMarkerWithGalleryImage() {
-        Intent intent = new Intent(Intent.ACTION_GET_CONTENT);
+        Intent intent;
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            intent = new Intent(MediaStore.ACTION_PICK_IMAGES);
+            intent.putExtra(MediaStore.EXTRA_PICK_IMAGES_MAX, 1);
+        } else {
+            intent = new Intent(Intent.ACTION_GET_CONTENT);
+        }
         intent.setType("image/*");
         takePictureFromGallery.launch(intent);
     }

src/main/java/de/dennisguse/opentracks/ui/util/ListItemUtils.java

@@ -22,6 +22,8 @@ import android.view.ViewGroup.LayoutParams;
 import android.widget.ImageView;
 import android.widget.TextView;
 
+import androidx.core.content.ContextCompat;
+
 import java.time.OffsetDateTime;
 import java.time.format.DateTimeFormatter;
 
@@ -169,7 +171,7 @@ public class ListItemUtils {
         textView.setVisibility(View.VISIBLE);
         textView.setText(value);
         if (addShadow) {
-            textView.setShadowLayer(5, 0, 2, context.getResources().getColor(android.R.color.black));
+            textView.setShadowLayer(5, 0, 2, ContextCompat.getColor(context, android.R.color.black));
         } else {
             textView.setShadowLayer(0, 0, 0, 0);
         }

src/main/java/de/dennisguse/opentracks/ui/util/RecyclerViewSwipeDeleteCallback.java

@@ -27,11 +27,11 @@ abstract public class RecyclerViewSwipeDeleteCallback extends ItemTouchHelper.Ca
 
     public RecyclerViewSwipeDeleteCallback(Context context) {
         background = new ColorDrawable();
-        backgroundColor = context.getResources().getColor(R.color.colorBackgroundDelete);
+        backgroundColor = ContextCompat.getColor(context, R.color.colorBackgroundDelete);
         clearPaint = new Paint();
         clearPaint.setXfermode(new PorterDuffXfermode(PorterDuff.Mode.CLEAR));
         deleteDrawable = ContextCompat.getDrawable(context, R.drawable.ic_delete_forever_24dp);
-        deleteDrawable.setTint(context.getResources().getColor(R.color.colorForegroundDelete));
+        deleteDrawable.setTint(ContextCompat.getColor(context, R.color.colorForegroundDelete));
         intrinsicWidth = deleteDrawable.getIntrinsicWidth();
         intrinsicHeight = deleteDrawable.getIntrinsicHeight();
     }

src/main/java/de/dennisguse/opentracks/util/EGM2008Utils.java

@@ -65,7 +65,7 @@ public class EGM2008Utils {
         if (location.getLongitude() >= 0) {
             longitude = location.getLongitude();
         } else {
-            longitude = 180 + Math.abs(location.getLongitude());
+            longitude = 360 + location.getLongitude();
         }
         int longitudeIndex = (int) (longitude * RESOLUTION_IN_MINUTES);
 
@@ -172,5 +172,13 @@ public class EGM2008Utils {
         public int hashCode() {
             return Objects.hash(latitudeIndex, longitudeIndex);
         }
+
+        @Override
+        public String toString() {
+            return "Indices{" +
+                    "latitudeIndex=" + latitudeIndex +
+                    ", longitudeIndex=" + longitudeIndex +
+                    '}';
+        }
     }
 }

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

@@ -17,8 +17,6 @@ import java.io.IOException;
 import java.io.OutputStream;
 import java.util.ArrayList;
 import java.util.List;
-import java.util.UUID;
-import java.util.regex.Pattern;
 
 import de.dennisguse.opentracks.R;
 import de.dennisguse.opentracks.data.models.Track;
@@ -85,12 +83,6 @@ public class ExportUtils {
         }
     }
 
-    public static boolean isExportFileExists(UUID uuuid, String trackFileFormatExtension, List<String> filesName) {
-        String word = uuuid.toString().substring(0, 8) + ".*\\." + trackFileFormatExtension;
-        Pattern pattern = Pattern.compile(word);
-        return filesName.stream().anyMatch(w -> pattern.matcher(w).matches());
-    }
-
     public static List<String> getAllFiles(Context context, Uri directoryUri) {
         List<String> fileNames = new ArrayList<>();
         final ContentResolver resolver = context.getContentResolver();

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

@@ -1,12 +1,15 @@
 package de.dennisguse.opentracks.util;
 
+import android.content.ActivityNotFoundException;
 import android.content.ClipData;
 import android.content.Context;
 import android.content.Intent;
 import android.net.Uri;
 import android.util.Log;
 import android.util.Pair;
+import android.widget.Toast;
 
+import androidx.annotation.Nullable;
 import androidx.appcompat.app.AlertDialog;
 
 import java.util.ArrayList;
@@ -136,7 +139,7 @@ public class IntentDashboardUtils {
      * @param targetClass the target class
      * @param trackIds the track ids
      */
-    public static void startDashboard(Context context, boolean isRecording, String targetPackage, String targetClass, Track.Id... trackIds) {
+    public static void startDashboard(Context context, boolean isRecording, @Nullable String targetPackage, @Nullable String targetClass, Track.Id... trackIds) {
         if (trackIds.length == 0) {
             return;
         }
@@ -166,14 +169,19 @@ public class IntentDashboardUtils {
         clipData.addItem(new ClipData.Item(uris.get(MARKERS_URI_INDEX)));
         intent.setClipData(clipData);
 
-        if ((targetPackage != null) && (targetClass != null)) {
+        if (targetPackage != null && targetClass != null) {
             Log.i(TAG, "Starting dashboard activity with explicit intent (package=" + targetPackage + ", class=" + targetClass + ")");
             intent.setClassName(targetPackage, targetClass);
         } else {
             Log.i(TAG, "Starting dashboard activity with generic intent (package=" + targetPackage + ", class=" + targetClass + ")");
         }
 
-        context.startActivity(intent);
+        try {
+            context.startActivity(intent);
+        } catch (ActivityNotFoundException e) {
+            Log.e(TAG, "Dashboard not installed; cannot start it.");
+            Toast.makeText(context, R.string.show_on_dashboard_not_installed, Toast.LENGTH_SHORT).show();
+        }
     }
 
     /**

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

@@ -0,0 +1,101 @@
+package de.dennisguse.opentracks.util;
+
+import android.Manifest;
+import android.content.Context;
+import android.content.pm.PackageManager;
+import android.os.Build;
+
+import androidx.activity.result.ActivityResultCaller;
+import androidx.activity.result.ActivityResultLauncher;
+import androidx.activity.result.contract.ActivityResultContracts;
+import androidx.annotation.Nullable;
+import androidx.core.content.ContextCompat;
+import androidx.fragment.app.Fragment;
+
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.List;
+
+public class PermissionRequester {
+
+    private final List<String> permissions;
+
+    public PermissionRequester(List<String> permissions) {
+        this.permissions = permissions;
+    }
+
+    public boolean hasPermission(Context context) {
+        return permissions.stream()
+                .map(p -> ContextCompat.checkSelfPermission(context, p))
+                .allMatch(r -> r == PackageManager.PERMISSION_GRANTED);
+    }
+
+    public void requestPermissionsIfNeeded(Context context, ActivityResultCaller caller, @Nullable Runnable onGranted, @Nullable RejectedCallback onRejected) {
+        if (!hasPermission(context)) {
+            requestPermission(caller, onGranted, onRejected);
+        }
+    }
+
+    public boolean shouldShowRequestPermissionRationale(Fragment context) {
+        return permissions.stream()
+                .anyMatch(context::shouldShowRequestPermissionRationale);
+    }
+
+    private void requestPermission(ActivityResultCaller context, @Nullable Runnable onGranted, @Nullable RejectedCallback onRejected) {
+        ActivityResultLauncher<String[]> locationPermissionRequest = context.registerForActivityResult(new ActivityResultContracts.RequestMultiplePermissions(), result -> {
+                    boolean isGranted = permissions.stream()
+                            .allMatch(p -> result.getOrDefault(p, false));
+                    if (isGranted && onGranted != null) {
+                        onGranted.run();
+                    }
+                    if (!isGranted && onRejected != null) {
+                        onRejected.rejected(this);
+                    }
+                }
+        );
+
+        locationPermissionRequest.launch(permissions.toArray(permissions.toArray(new String[0])));
+    }
+
+    private static final List<String> GPS_PERMISSION = List.of(Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION);
+
+    private static final List<String> BLUETOOTH_PERMISSIONS;
+
+    static {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.S) {
+            BLUETOOTH_PERMISSIONS = List.of(Manifest.permission.BLUETOOTH_SCAN, Manifest.permission.BLUETOOTH_CONNECT);
+        } else {
+            BLUETOOTH_PERMISSIONS = Collections.emptyList();
+        }
+    }
+
+    private static final List<String> NOTIFICATION_PERMISSIONS;
+
+    static {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.TIRAMISU) {
+            NOTIFICATION_PERMISSIONS = List.of(Manifest.permission.POST_NOTIFICATIONS);
+        } else {
+            NOTIFICATION_PERMISSIONS = Collections.emptyList();
+        }
+    }
+
+    private static final List<String> ALL_PERMISSIONS;
+
+    static {
+        ArrayList<String> all = new ArrayList<>(GPS_PERMISSION);
+        all.addAll(BLUETOOTH_PERMISSIONS);
+        all.addAll(NOTIFICATION_PERMISSIONS);
+
+        ALL_PERMISSIONS = Collections.unmodifiableList(all);
+    }
+
+    public final static PermissionRequester GPS = new PermissionRequester(GPS_PERMISSION);
+    public final static PermissionRequester BLUETOOTH = new PermissionRequester(BLUETOOTH_PERMISSIONS);
+    public final static PermissionRequester NOTIFICATION = new PermissionRequester(NOTIFICATION_PERMISSIONS);
+
+    public final static PermissionRequester ALL = new PermissionRequester(ALL_PERMISSIONS);
+
+    public interface RejectedCallback {
+        void rejected(PermissionRequester permissionRequester);
+    }
+}

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

@@ -1,74 +0,0 @@
-package de.dennisguse.opentracks.util;
-
-import android.Manifest;
-import android.content.Context;
-import android.content.pm.PackageManager;
-import android.os.Build;
-
-import androidx.activity.result.ActivityResultCaller;
-import androidx.activity.result.ActivityResultLauncher;
-import androidx.activity.result.contract.ActivityResultContracts;
-import androidx.annotation.Nullable;
-import androidx.core.content.ContextCompat;
-import androidx.fragment.app.Fragment;
-
-import java.util.Arrays;
-
-public class PermissionUtils {
-
-    private static final String[] GPS = new String[]{Manifest.permission.ACCESS_FINE_LOCATION, Manifest.permission.ACCESS_COARSE_LOCATION};
-    private static final String[] BLUETOOTH;
-
-    static {
-        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.S) {
-            BLUETOOTH = new String[]{};
-        } else {
-            BLUETOOTH = new String[]{Manifest.permission.BLUETOOTH_SCAN, Manifest.permission.BLUETOOTH_CONNECT};
-        }
-    }
-
-    private PermissionUtils() {
-    }
-
-    public static boolean hasGPSPermission(Context context) {
-        return hasPermissions(context, GPS);
-    }
-
-    public static void requestGPSPermission(ActivityResultCaller context, @Nullable Runnable onGranted, @Nullable Runnable onRejected) {
-        requestPermission(context, GPS, onGranted, onRejected);
-    }
-
-    public static boolean shouldShowRequestPermissionRationaleBluetooth(Fragment context) {
-        return Arrays.stream(BLUETOOTH).anyMatch(context::shouldShowRequestPermissionRationale);
-    }
-
-    public static boolean hasBluetoothPermissions(Context context) {
-        return hasPermissions(context, BLUETOOTH);
-    }
-
-    public static void requestBluetoothPermission(ActivityResultCaller context, @Nullable Runnable onGranted, @Nullable Runnable onRejected) {
-        requestPermission(context, BLUETOOTH, onGranted, onRejected);
-    }
-
-    private static void requestPermission(ActivityResultCaller context, final String[] permissions, @Nullable Runnable onGranted, @Nullable Runnable onRejected) {
-        ActivityResultLauncher<String[]> locationPermissionRequest = context.registerForActivityResult(new ActivityResultContracts.RequestMultiplePermissions(), result -> {
-                    boolean isGranted = Arrays.stream(permissions)
-                            .allMatch(p -> result.getOrDefault(p, false));
-                    if (isGranted && onGranted != null) {
-                        onGranted.run();
-                    }
-                    if (!isGranted && onRejected != null) {
-                        onRejected.run();
-                    }
-                }
-        );
-
-        locationPermissionRequest.launch(permissions);
-    }
-
-    private static boolean hasPermissions(Context context, String[] permissions) {
-        return Arrays.stream(permissions)
-                .map(p -> ContextCompat.checkSelfPermission(context, p))
-                .allMatch(r -> r == PackageManager.PERMISSION_GRANTED);
-    }
-}

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

@@ -254,13 +254,14 @@ public class StringUtils {
     /**
      * @return the formatted altitude_m (or null) and it's unit as {@link Pair}
      */
+    //TODO altitude_m should be double or a value object
     public static Pair<String, String> getAltitudeParts(Context context, Float altitude_m, UnitSystem unitSystem) {
         DistanceFormatter formatter = DistanceFormatter.Builder()
                 .setDecimalCount(1)
                 .setUnit(unitSystem)
                 .build(context);
 
-        Distance distance = altitude_m != null ? Distance.of(altitude_m) : Distance.of(Double.NaN); //TODO Refactor Double.NaN
+        Distance distance = altitude_m != null ? Distance.of(altitude_m) : Distance.of((Double) null);
         return formatter.getDistanceParts(distance);
     }
 

src/main/res/values-ar/strings.xml

@@ -1,4 +1,5 @@
-<?xml version="1.0" encoding="utf-8"?><!--
+<?xml version="1.0" encoding="utf-8"?>
+<!--
 Copyright 2010 Google Inc.
 
 Licensed under the Apache License, Version 2.0 (the "License");
@@ -12,8 +13,7 @@ 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.
--->
+--><resources>
-<resources>
     <!-- Activity Type -->
     <string name="activity_type_airplane">طائرة</string>
     <string name="activity_type_atv">ATV</string>
@@ -200,14 +200,15 @@ limitations under the License.
     <string name="settings_stats_units_imperial">وحدات القياس البريطانية (ميل، قدم)</string>
     <string name="settings_stats_units_metric">وحدات القياس المترية (كم، م)</string>
     <string name="settings_stats_units_title">الوحدات المفضلة</string>
-
     <!-- Share Track -->
-    <string name="share_track_share_file_body">أعتقد أنك قد تكون مهتمًا بهذا المسار.\n\nلعرض هذا المسار، استخدام برنامج Google Earth أو غيره من البرامج تصميم الخرائط.\n\n%1$s</string>
+    <string name="share_track_share_file_body">أعتقد أنك قد تكون مهتمًا بهذا المسار.
+\n
+\n%1$s</string>
     <string name="share_track_subject">أريد مشاركة مسار معك</string>
     <!-- Stats -->
     <string name="stats_average_moving_pace">متوسط إيقاع التحرك</string>
     <string name="stats_average_moving_speed">متوسط سرعة التحرك</string>
-    <string name="stats_average_pace">متوسط ​​الإيقاع</string>
+    <string name="stats_average_pace">متوسط الإيقاع</string>
     <string name="stats_average_speed">متوسط السرعة</string>
     <string name="stats_altitude">الارتفاع</string>
     <string name="stats_fastest_pace">أسرع إيقاع</string>

src/main/res/values-b+es+419/strings.xml

@@ -411,7 +411,6 @@
     <string name="stats_split_interval">Intervalo partido</string>
     <string name="track_recording_notification_accuracy">Precisión de ubicación: %1$s</string>
     <string name="track_pace_notification">Ritmo: %1$s</string>
-    <string name="track_delete_progress">%1$d/%2$d</string>
     <string name="track_detail_intervals_tab">Intervalos</string>
     <string name="interval_list_empty_message">Aún no hay ningún intervalo</string>
     <string name="settings_recording_customize_layout_title">Personalice su pantalla de grabación</string>

src/main/res/values-bg/strings.xml

@@ -458,7 +458,6 @@ limitations under the License.
     <string name="settings_recording_show_on_lockscreen_while_recording_title">Показване на статистически данни на заключения екран</string>
     <string name="help_data_google_play_services_title">Изисква ли OpenTracks/използва ли услугата Google Play\?</string>
     <string name="about_version_code">Код на версията: %1$d</string>
-    <string name="track_delete_progress">%1$d/%2$d</string>
     <string name="export_error_post_workout">Експортът след тренировка е неуспешен, моля, проверете директорията за експорт.</string>
     <string name="about_third_party_data">Данни от трети страни</string>
     <string name="import_unsupported_format">Неподдържан формат на файла</string>

src/main/res/values-cs/strings.xml

@@ -15,14 +15,14 @@ See the License for the specific language governing permissions and
 limitations under the License.
 --><resources>
     <string name="about_preference_title">O OpenTracks</string>
-    <string name="about_description"><i> OpenTracks </i> je sportovní sledovací aplikace, která zcela respektuje vaše soukromí.</string>
+    <string name="about_description"><i> OpenTracks </i> je aplikace pro záznam vašich sportů, která zcela respektuje vaše soukromí.</string>
     <string name="about_url">Webová stránka projektu: <a href="%1$s">%1$s</a></string>
     <string name="about_version_name">Název verze: %1$s</string>
     <string name="about_version_code">Kód verze: %1$d</string>
-    <string name="about_history">OpenTracks je fork aplikace <a href="https://code.google.com/archive/p/mytracks/"> <i> MyTracks Google </i> </a> (v roce 2016 ukončena).</string>
+    <string name="about_history">OpenTracks je fork aplikace <a href="https://code.google.com/archive/p/mytracks/"> <i> MyTracks Google </i> </a> (ukončena v roce 2016).</string>
     <string name="about_libraries">Knihovny</string>
     <!-- Help -->
-    <string name="help_feature_title">OpenTracks má následující funkce:</string>
+    <string name="help_feature_title">OpenTracks dokáže:</string>
     <string name="help_feature_content">* vytvářet GPS stopy
 \n* použít snímač srdeční frekvence (pouze Bluetooth LE)
 \n* hlasová oznámení (podle času nebo vzdálenosti)
@@ -34,14 +34,14 @@ limitations under the License.
 \n a) (živé aktualizace) Nainstalujte <a href="https://github.com/OpenTracksApp/OSMDashboard">OSMDashboard</a>. Poskytuje online nebo offline mapy prostřednictvím <a href="https://www.openstreetmap.org">OpenStreetMap</a>.
 \n Ve skutečnosti je OSMDashboard samostatná aplikace, která má přístup (dočasně) pouze k datům stop, které se budou zobrazovat.
 \n b) Prostřednictvím „normální“ mapové aplikace (např. <a href="http://osmand.net/">OsmAnd</a> a <a href="https://maps.me/">MAPS.ME</a>). Tyto aplikace musí podporovat formát souboru KMZ (pouze umístění a časová razítka). Ve skutečnosti musí aplikace podporovat <i>ACTION_VIEW</i> pomocí MIME <i>application/vnd.google-earth.kmz</i>. </string>
-    <string name="help_storage_pictures_title">Jak ukládá OpenTracks obrázky pořízené jako značky?</string>
+    <string name="help_storage_pictures_title">Jak ukládá OpenTracks obrázky pořízené jako značky na cestě\?</string>
     <string name="help_storage_pictures_content">Jsou uloženy v interním úložišti aplikace (tj. přístupné pouze v rámci OpenTracks).</string>
     <string name="help_track_export_title">Jak mohu exportovat/sdílet zaznamenané stopy\?</string>
-    <string name="help_track_export_content"> Trasy lze exportovat z Nastavení jako KMZ, KML nebo GPX. KMZ a KML obsahuje všechna data, GPX pouze umístění. Trasy sdílené pomocí <i>ikony sdílení</i> jsou sdíleny jako KMZ. </string>
+    <string name="help_track_export_content"> Trasy lze exportovat z Nastavení jako KMZ, KML nebo GPX. KMZ a KML obsahuje všechna data, GPX pouze polohu. Trasy sdílené pomocí <i>ikony sdílení</i> jsou sdíleny jako KMZ. </string>
     <string name="help_data_google_play_services_title">Vyžaduje/používá OpenTracks službu Google Play\?</string>
     <string name="help_recording_title">Jak OpenTracks zaznamenává data?</string>
     <string name="help_recording_content">OpenTracks používá GPS senzor zařízení k nepřetržitému zaznamenávání polohy. Pokud zařízení GPS hlásí nepřesná data (např. polohu, rychlost, nadmořskou výšku), OpenTracks s tím nemůže nic udělat.</string>
-    <string name="help_data_storage_title">Jak OpenTracks ukládá data senzorů?</string>
+    <string name="help_data_storage_title">Jak OpenTracks ukládá data ze senzorů\?</string>
     <string name="help_data_storage_content"> Data senzoru se ukládají na zaznamenané místo. Pokud jde o snímač srdeční frekvence, znamená to, že na každé místo je uloženo pouze <i> jedno </i> měření srdeční frekvence. Pokud stojíte v klidu nebo jste uvnitř, nebudou zaznamenána žádná data ze senzorů (ale budou zobrazena). </string>
     <string name="help_gps_troubleshooting_title">OpenTracks nezaznamenává místa?</string>
     <string name="help_gps_troubleshooting_content"> Co můžete udělat:
@@ -469,7 +469,6 @@ limitations under the License.
     <string name="track_speed_notification">Rychlost: %1$s</string>
     <string name="track_pace_notification">Rychlost: %1$s</string>
     <string name="about_third_party_data">Údaje třetích stran</string>
-    <string name="track_delete_progress">%1$d/%2$d</string>
     <string name="delete_service">Služba mazání</string>
     <string name="menu_voice_rate">Rychlost hlasových oznámení</string>
     <string name="track_delete_not_recording">Není možno vymazat aktuálně zaznamenávanou trasu.</string>
@@ -574,4 +573,5 @@ limitations under the License.
     <string name="settings_public_api_dashboard_enabled_summary_on">Aplikace, která zahájila nahrávání, může také přistupovat k nahraným datům.</string>
     <string name="settings_public_api_dashboard_enabled_summary_off">Zaznamenaná data nebudou automaticky sdílena s jinými aplikacemi.</string>
     <string name="pace">Tempo</string>
+    <string name="track_discarding">Mazání trasy</string>
 </resources>

src/main/res/values-da/strings.xml

@@ -467,7 +467,6 @@ Hvis GPS-enheden rapporterer unøjagtige data (f.eks. Placering, hastighed, høj
     <string name="track_speed_notification">Hastighed: %1$s</string>
     <string name="about_third_party_data">Data fra tredjeparter</string>
     <string name="delete_service">Tjeneste til sletning</string>
-    <string name="track_delete_progress">%1$d/%2$d</string>
     <string name="menu_voice_rate">Stemmehastighed</string>
     <string name="track_delete_not_recording">Dette spor kan ikke slettes, da det er optaget i øjeblikket.</string>
     <string name="settings_sensor_cycling_distance_speed">Afstand og hastighed</string>

src/main/res/values-de/strings.xml

@@ -276,9 +276,8 @@ Meldet das GPS-Gerät ungenaue Daten (z.B. Standort, Geschwindigkeit, Höhe), ka
 \n%1$s</string>
     <string name="share_track_subject">Ich möchte einen Track mit dir teilen</string>
     <!-- Stats -->
-    <string name="stats_average_moving_pace">Durchschnitt\n(Bewegung)</string>
+    <string name="stats_average_moving_pace">Durchschnittliches Bewegungstempo</string>
-    <string name="stats_average_moving_speed">Durchschnittsgeschwindigkeit
+    <string name="stats_average_moving_speed">Mittlere Geschwindigkeit in Bewegung</string>
-\n(Bewegung)</string>
     <string name="stats_average_pace">Durchschnitt</string>
     <string name="stats_average_speed">Durchschnittsgeschwindigkeit</string>
     <string name="stats_altitude">Höhe</string>
@@ -464,13 +463,12 @@ Meldet das GPS-Gerät ungenaue Daten (z.B. Standort, Geschwindigkeit, Höhe), ka
     <string name="about_third_party_data">Daten von Drittherstellern</string>
     <string name="sensor_state_heart_rate_max">Maximaler Herzfrequenz</string>
     <string name="track_delete_not_recording">Dieser Track kann nicht gelöscht werden, da er gerade aufgezeichnet wird.</string>
-    <string name="interval_list_empty_message">Es gibt noch keine Intervalle.</string>
+    <string name="interval_list_empty_message">Es gibt noch keine Intervalle</string>
     <string name="import_parser_error">Parser Fehler: %1$s</string>
     <string name="settings_recording_fullscreen_on_while_recording_summary">Anzeige im Vollbildmodus während der Aufzeichnung.</string>
     <string name="sensor_state_heart_rate_avg">Durchschnittlicher Herzfrequenz</string>
     <string name="settings_prevent_reimport_tracks_title">Verhindere den erneuten Import von Strecken(aufzeichnungen)</string>
     <string name="import_no_kml_file_found">Keine doc.kml Datei im KMZ gefunden</string>
-    <string name="track_delete_progress">%1$d/%2$d</string>
     <string name="import_thread_interrupted">Thread unterbrochen</string>
     <string name="import_unable_to_import_file">Importieren der Datei gescheitert: %1$s</string>
     <string name="delete_service">Löschdienst</string>
@@ -575,4 +573,7 @@ Meldet das GPS-Gerät ungenaue Daten (z.B. Standort, Geschwindigkeit, Höhe), ka
     <string name="report_bug">Fehler melden</string>
     <string name="settings_ui_summary">Erscheinungsbild, Aufzeichnungslayout, Theme</string>
     <string name="settings_gps_summary">Zeitintervall, Entfernungsintervall, Max Entfernung, Genauigkeit</string>
+    <string name="description_speed_nautical">Geschwindigkeit (Knoten)</string>
+    <string name="settings_open_tracks_title">Open Tracks</string>
+    <string name="gps_recording_status">%1$s: %2$s</string>
 </resources>