stock on 2/2 Messengers and Handlers:services

in the second task i need to "Now create a Messenger using this Handler and return it in onBind."

i try without succses.

my code:

public class GeolocationService extends Service {
    int mLatitude;
    int mLongitude;
//private GeolocationService  mGeolocationService;
  private Messenger mMessenger = new Messenger(new LocationHandler(GeolocationService.this));


    // some methods omitted

    @Override
    public IBinder onBind(Intent intent) {
      return mMessenger.getBinder();
    }

  public class LocationHandler extends Handler {

}

     @Override
    public void handleMessage(Message message){
      mLatitude = getLatitude();
        mLongitude = getLongitude();  
    } 
  }
}

and this what the compailer says:

./GeolocationService.java:28: error: class, interface, or enum expected } ^

./GeolocationService.java:5: error: constructor LocationHandler in class GeolocationService.LocationHandler cannot be applied to given types; private Messenger mMessenger = new Messenger(new LocationHandler(GeolocationService.this)); ^

required: no arguments found: GeolocationService reason: actual and formal argument lists differ in length ./GeolocationService.java:19: error: method does not override or implement a method from a supertype @Override ^

3 errors