提问者:小点点

片段回收器视图onCreateView,onViewCreated还是onActivityCreated?


我应该在onCreateView、onViewCreated还是onActivityCreated中初始化我的回收器视图?

这3个之间有什么区别,我搜索了解释,但有些人说使用onCreateView,有些人说使用onViewCreated或onActivityCreated并且只使用onCreateView来膨胀布局?

这是我的代码

@Override
public View onCreateView(@NonNull LayoutInflater inflater, ViewGroup container,
                         Bundle savedInstanceState) {
    // Inflate the layout for this fragment
    View rootView = inflater.inflate(R.layout.fragment_tab1, container, false);

    recyclerViewSongs = rootView.findViewById(R.id.recyclerViewSongs);

    initRecyclerView();

    Log.e(TAG, "onCreateView called!");

    return rootView;

}

private void initRecyclerView() {
    Main.musicList = Main.songs.songs;

    // Connects the song list to an adapter
    // (Creates several Layouts from the song list)
    allSongsAdapter = new AllSongsAdapter(getContext(), Main.musicList);

    final LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity());

    recyclerViewSongs.setLayoutManager(linearLayoutManager);
    recyclerViewSongs.setHasFixedSize(true);
    recyclerViewSongs.setAdapter(allSongsAdapter);

    recyclerViewSongs.addOnItemTouchListener(new OnItemClickListeners(getContext(), new OnItemClickListeners.OnItemClickListener() {
            @TargetApi(Build.VERSION_CODES.O)
            @Override
            public void onItemClick(View view, int position) {
                Toast.makeText(getContext(), "You Clicked position: " + position, Toast.LENGTH_SHORT).show();
                if (! Main.songs.isInitialized())
                    return;
                //Start playing the selected song.
                playAudio(position);
            }
        }));

}

共2个答案

匿名用户

onCreateView()将是最好的选择,因为您使用的是Fragment。不同之处在于onCreateView()onCreate()for Activity的Fragment等价物,在View创建期间运行,但onViewCreated()View创建后运行。

onActivityCreated()调用onCreate()方法的Activity完成后,你可以在这里看到:https://stackoverflow.com/a/44582434/4409113

匿名用户

最好的设置级别是onCreateView(),在Activity的情况下相当于onCreate(),因为RecyclerView需要快速,以免UI缓慢。因此,onViewCreated()中的RecyclerView将在填充UI之前使UI缓慢。