@Override
  public void onDetach() {
    super.onDetach();
    Log.d(TAG, "onDetach");

    mListener.hideLoader();
    mListener = null;
  }
 public void goToDiscover() {
   if (mListener != null) {
     Bundle args = new Bundle();
     mListener.onFragmentInteraction("DiscoverFragment", args);
   }
 }