private void initializeActionBar() {
   getSupportActionBar()
       .setTitle(
           recipient == null
               ? getString(R.string.AndroidManifest__media_overview)
               : getString(
                   R.string.AndroidManifest__media_overview_named, recipient.toShortString()));
 }
  private void initializeResources() {
    threadId = getIntent().getLongExtra(THREAD_ID_EXTRA, -1);

    noImages = (TextView) findViewById(R.id.no_images);
    gridView = (RecyclerView) findViewById(R.id.media_grid);
    gridManager =
        new GridLayoutManager(this, getResources().getInteger(R.integer.media_overview_cols));
    gridView.setLayoutManager(gridManager);
    gridView.setHasFixedSize(true);

    final long recipientId = getIntent().getLongExtra(RECIPIENT_EXTRA, -1);
    if (recipientId > -1) {
      recipient = RecipientFactory.getRecipientForId(this, recipientId, true);
      recipient.addListener(
          new Recipient.RecipientModifiedListener() {
            @Override
            public void onModified(Recipient recipient) {
              initializeActionBar();
            }
          });
    } else {
      recipient = null;
    }
  }