OnLocationChanged callback is never called

Question

I am trying to get the users current location using the LocationManager. I have done a lot of research and can\'t seem to find anyone with the same problem. T

Answer 1

Sorry for bumping such an old thread, but this might come handy to some others, since this question is ranking relatively high on google search.

I had a similar problem, the onlocationchanged wasn't getting fired, but I could not find anything wrong with my code. After trying all sorts of combination, I realised that the root cause of the problem was the fact that I was registering the listener in a service.

The service WAS a foreground service, so based on Google documentation that should work, it DID NOT!

Wrapping the initialisation in a method, and calling the method from the activity which created or bind to the service solved my problem.

This is my method in my service:

void start_gps_track(int i) {
        if (myCarLocationListener!=null) {
            if (i==1) //if start night
                myCarLocationListener.setNightstart(true);
            else if (i==2) //if start GPS
                myCarLocationListener.setLocationStart(true);
            return;
        }
        locationManager = (LocationManager) getSystemService(Context.LOCATION_SERVICE);
        if ( locationManager.isProviderEnabled( LocationManager.GPS_PROVIDER ) ) {
            myCarLocationListener=new CarLocationListener(this,adjust_audio);
            if (i==1) //if start night
                myCarLocationListener.setNightstart(true);
            else if (i==2) //if start GPS
                myCarLocationListener.setLocationStart(true);
            try {
                locationManager.requestLocationUpdates(LocationManager.GPS_PROVIDER, 100, 0, myCarLocationListener);
                Log.d("HU","Registered location listener");
                Location lastlocation = locationManager.getLastKnownLocation(LocationManager.NETWORK_PROVIDER);
                if (lastlocation == null)
                    lastlocation = locationManager.getLastKnownLocation(LocationManager.GPS_PROVIDER);
                if (lastlocation != null)
                    myCarLocationListener.onLocationChanged(lastlocation);
            }
            catch (SecurityException e){
                Log.e("HU-GPS","No permission to access Location");
            }
        }
        else
        {
            Log.e("HU-GPS","No GPS provider or no permission");
        }
    }

If I call this from within the Service itself I won't receive any Location Updates (again note service is a FOREGROUND service and it's actually binded to an activity which is currently running).

However if I call this method from the activity which created/bound to the service like below it works fine:

@Override
public void onServiceConnected(ComponentName className,
                               IBinder service) {
    // We've bound to LocalService, cast the IBinder and get LocalService instance
    TransporterService.LocalBinder binder = (TransporterService.LocalBinder) service;
    mService = binder.getService();
    mService.updatePlayer(player.this);
    try {
        mService.start_gps_track(0);
    }
    catch (Exception e) {            //This should only happen if there is no GPS provider available, but it might happen quickly after boot when the device is not yet ready.
        mService.recheck_gps(0);
    }

    mBound = true;
  }

@Override
public void onServiceDisconnected(ComponentName arg0) {
    mBound = false;

}
};

Hope this helps some others who come across this problem.