Bugfix: free memory in onDestroy().

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

@@ -58,12 +58,12 @@ import de.dennisguse.opentracks.fragments.ConfirmDeleteDialogFragment;
 import de.dennisguse.opentracks.services.TrackRecordingService;
 import de.dennisguse.opentracks.services.TrackRecordingServiceConnection;
 import de.dennisguse.opentracks.services.handlers.GpsStatusValue;
+import de.dennisguse.opentracks.settings.PreferencesUtils;
 import de.dennisguse.opentracks.settings.SettingsActivity;
 import de.dennisguse.opentracks.util.ActivityUtils;
 import de.dennisguse.opentracks.util.IntentDashboardUtils;
 import de.dennisguse.opentracks.util.IntentUtils;
 import de.dennisguse.opentracks.util.ListItemUtils;
-import de.dennisguse.opentracks.settings.PreferencesUtils;
 import de.dennisguse.opentracks.util.StringUtils;
 import de.dennisguse.opentracks.util.TrackIconUtils;
 
@@ -248,6 +248,13 @@ public class TrackListActivity extends AbstractTrackDeleteActivity implements Co
         trackRecordingServiceConnection.unbind(this);
     }
 
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        viewBinding = null;
+        trackRecordingServiceConnection = null;
+    }
+
     @Override
     protected View getRootView() {
         viewBinding = TrackListBinding.inflate(getLayoutInflater());

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

@@ -28,10 +28,10 @@ import de.dennisguse.opentracks.fragments.IntervalsFragment;
 import de.dennisguse.opentracks.fragments.StatisticsRecordingFragment;
 import de.dennisguse.opentracks.services.TrackRecordingService;
 import de.dennisguse.opentracks.services.TrackRecordingServiceConnection;
+import de.dennisguse.opentracks.settings.PreferencesUtils;
 import de.dennisguse.opentracks.settings.SettingsActivity;
 import de.dennisguse.opentracks.util.IntentDashboardUtils;
 import de.dennisguse.opentracks.util.IntentUtils;
-import de.dennisguse.opentracks.settings.PreferencesUtils;
 import de.dennisguse.opentracks.util.TrackIconUtils;
 import de.dennisguse.opentracks.util.TrackUtils;
 
@@ -232,6 +232,13 @@ public class TrackRecordingActivity extends AbstractActivity implements ChooseAc
         trackDataHub.stop();
     }
 
+    @Override
+    protected void onDestroy() {
+        super.onDestroy();
+        viewBinding = null;
+        trackRecordingServiceConnection = null;
+    }
+
     @Override
     protected View getRootView() {
         viewBinding = TrackRecordingBinding.inflate(getLayoutInflater());