Android - Google Maps API v2 - Change location button position

public class MapFragment extends SupportMapFragment {

  @Override
  public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
      View mapView = super.onCreateView(inflater, container, savedInstanceState);   
  
      // Get the button view 
      View locationButton = ((View) mapView.findViewById(1).getParent()).findViewById(2);
  
      // and next place it, for exemple, on bottom right (as Google Maps app)
      RelativeLayout.LayoutParams rlp = (RelativeLayout.LayoutParams) locationButton.getLayoutParams();
      // position on right bottom
      rlp.addRule(RelativeLayout.ALIGN_PARENT_TOP, 0);
      rlp.addRule(RelativeLayout.ALIGN_PARENT_BOTTOM, RelativeLayout.TRUE);
      rlp.setMargins(0, 0, 30, 30);