code: @Override protected void onCreate(Bundle savedInstanceState) {
      super.onCreate(savedInstanceState);
      setContentView(R.layout.activity_youtube_sample);
      ButterKnife.inject(this);
      initializeYoutubeFragment();
      initializeDraggablePanel();
      hookDraggablePanelListeners();
    }
docs: Initialize the Activity with some injected data.