Locationmanager Listner не работает в Android 6.0.1

Question

Я пытаюсь реализовать LocationManager в проекте Android, но он не работает на устройстве Android 6.0.1.

Ниже приведен мой MainActivity код

public class MainActivity extends AppCompatActivity {

    private static final String TAG = "MainActivity";

    private String latitude = "0";
    private String longitude = "0";

    public BackgroundService gpsService;
    private LocationManager mLocationManager;
    private LocationListener mLocationListener;

    private final int LOCATION_INTERVAL = 500;
    private final int LOCATION_DISTANCE = 10;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        final Intent intent = new Intent(this.getApplication(), BackgroundService.class);
        this.getApplication().startService(intent);
        this.getApplication().bindService(intent, serviceConnection, Context.BIND_AUTO_CREATE);

        startLocationTracking();

    }

    public void startLocationButtonClick() {
        Dexter.withActivity(this)
            .withPermission(Manifest.permission.ACCESS_FINE_LOCATION)
            .withListener(new PermissionListener() {
                @Override
                public void onPermissionGranted(PermissionGrantedResponse response) {
                    if (mLocationManager == null) {
                        mLocationManager = (LocationManager) getApplicationContext().getSystemService(Context.LOCATION_SERVICE);
                    }
                    mLocationListener = new LocationListener(LocationManager.GPS_PROVIDER);

                    try {

                        mLocationManager.requestLocationUpdates( LocationManager.GPS_PROVIDER, LOCATION_INTERVAL, LOCATION_DISTANCE, mLocationListener );

                    } catch (java.lang.SecurityException ex) {
                        // Log.i(TAG, "fail to request location update, ignore", ex);
                    } catch (IllegalArgumentException ex) {
                        // Log.d(TAG, "gps provider does not exist " + ex.getMessage());
                    }
                }

                @Override
                public void onPermissionDenied(PermissionDeniedResponse response) {
                    if (response.isPermanentlyDenied()) {
                        openSettings();
                    }
                }

                @Override
                public void onPermissionRationaleShouldBeShown(PermissionRequest permission, PermissionToken token) {
                    token.continuePermissionRequest();
                }
            }).check();
    }

    private ServiceConnection serviceConnection = new ServiceConnection() {
        public void onServiceConnected(ComponentName className, IBinder service) {
            String name = className.getClassName();
            if (name.endsWith("BackgroundService")) {
                gpsService = ((BackgroundService.LocationServiceBinder) service).getService();
            }
        }

        public void onServiceDisconnected(ComponentName className) {
            if (className.getClassName().equals("BackgroundService")) {
                gpsService = null;
            }
        }
    };

    private class LocationListener implements android.location.LocationListener {

        private Location lastLocation = null;
        private final String TAG = "LocationListener";
        private Location mLastLocation;

        public LocationListener(String provider)
        {
            mLastLocation = new Location(provider);
        }

        @Override
        public void onLocationChanged(Location location)
        {

            mLastLocation = location;
            latitude = Double.toString(mLastLocation.getLatitude());
            longitude = Double.toString(mLastLocation.getLongitude());
            Log.i(TAG, "LocationChanged: "+ mLastLocation);
        }

        @Override
        public void onProviderDisabled(String provider)
        {
            Log.e(TAG, "onProviderDisabled: " + provider);
        }

        @Override
        public void onProviderEnabled(String provider)
        {
            Log.e(TAG, "onProviderEnabled: " + provider);
        }

        @Override
        public void onStatusChanged(String provider, int status, Bundle extras)
        {
            Log.e(TAG, "onStatusChanged: " + status);
        }
    }
}

Для некоторыхпричина, по которой это не входит в метод onLocationChanged.

Что я здесь не так делаю?

Спасибо