@Override
 protected void onPause() {
   Log.d(TAG, "onPause");
   mHandler.removeCallbacks(REFRESH_FLOWS_RUNNABLE);
   mCore.getBus().unregister(this);
   super.onPause();
 }
 @Override
 protected void onResume() {
   super.onResume();
   Log.d(TAG, "onResume");
   mCore.getBus().register(this);
   mHandler.post(REFRESH_FLOWS_RUNNABLE);
 }
 @Override
 public void onResume() {
   super.onResume();
   mHandler.postDelayed(mTimeUpdateRunnable, REFRESH_INTERVAL_MILLIS);
   mCore = KegbotCore.getInstance(getActivity());
   mCore.getBus().register(this);
 }
 @Override
 public void onPause() {
   mCore.getBus().unregister(this);
   mHandler.removeCallbacks(mTimeUpdateRunnable);
   super.onPause();
 }