@Nullable
  @Override
  public View onCreateView(
      LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
    View view = inflater.inflate(R.layout.fragment_active_reminders, container, false);

    adapter = new ReminderAdapter(ReminderHelper.getActiveReminders(), getContext());
    adapter.setHasStableIds(true);

    recyclerView = (RecyclerView) view.findViewById(R.id.recyclerView);
    recyclerView.setAdapter(adapter);
    recyclerView.setLayoutManager(new LinearLayoutManager(getContext()));
    recyclerView.setHasFixedSize(true);
    recyclerView.addItemDecoration(new SimpleDividerItemDecoration(getContext()));

    return view;
  }
 public void notifyDataSetChanged() {
   if (adapter != null) {
     adapter.setReminders(ReminderHelper.getActiveReminders());
     adapter.notifyDataSetChanged();
   }
 }