@Override
  public void onDetach() {
    super.onDetach();
    mRoboterHelper.stopPinging();

    mListener = null;
    mRoboterHelper = null;
  }
 @Override
 public void onTestButtonClicked() {
   mRoboterHelper.sendFeedCommand(mLastSpeedValue, (int) mLastAngleValue);
 }