Bugfix: NPE.

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

@@ -68,6 +68,7 @@ public class StatsFragment extends Fragment implements TrackDataListener {
     private TrackDataHub trackDataHub;
     private Handler handlerUpdateUI;
 
+    //TODO Initialize immediately and remove in onDestroy()
     private TrackRecordingServiceConnection trackRecordingServiceConnection;
 
     private Location lastLocation = null;
@@ -237,7 +238,9 @@ public class StatsFragment extends Fragment implements TrackDataListener {
     @Override
     public void onStop() {
         super.onStop();
-        trackRecordingServiceConnection.unbind();
+        if (trackRecordingServiceConnection != null) {
+            trackRecordingServiceConnection.unbind();
+        }
         trackRecordingServiceConnection = null;
     }
 

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

@@ -48,6 +48,8 @@ public class TrackRecordingServiceConnection implements ServiceConnection, Death
 
     private static final String TAG = TrackRecordingServiceConnection.class.getSimpleName();
 
+    @Deprecated
+    //TODO Always the context of the owner of a service connection (i.e., let it be passed to every call).
     private final Context context;
     private final Runnable callback;