@Override
 public void onConnected(Bundle bundle) {
   if (mFetchDataTask != null) {
     mFetchDataTask.cancel(true);
   }
   mFetchDataTask = new FetchDataTask();
   mFetchDataTask.execute();
 }
 @Override
 public void onStop() {
   super.onStop();
   if (mFetchDataTask != null) {
     mFetchDataTask.cancel(true);
   }
   mGoogleApiClient.disconnect();
 }