ArrayAdapter 未使用 notifyDataSetChanged() 进行更新

Question

我有一个使用 ArrayList 填充的 ListView，它工作正常，但是当我用新项目清除并重新填充 ArrayList 并调用 notifyDataSetChanged() 时，永远不会调用适配器的 getView() 并且 ListView 不会反映新数据。不知道我哪里出错了，但感谢任何帮助！谢谢

初始化视图和适配器

Arraylist<Movie> moviesArray = new Arraylist<>();
movieListView = view.findViewById(R.id.movie_list_view);
movieListAdapter = new MovieListArrayAdapter(this, requireContext(), R.layout.list_item, moviesArray);
movieListView.setAdapter(movieListAdapter);

要求新数据

moviesArray.clear()
moviesViewModel.GetMovies();

观察结果（我的 BottomSheet 已更新，所以我知道我正在接收数据）

moviesViewModel.getMoviesResult().observe(getViewLifecycleOwner(), new Observer<MovieList>() {
        @Override
        public void onChanged(MovieList movieList) {
            if (movieList!=null) {
            moviesArray.addAll(movieList.getResults());
                    movieListAdapter.notifyDataSetChanged();
            }
            UpdateBottomSheet(view, 0);
        }
    });

适配器（更新列表数据时不会调用getView）

public class MovieListArrayAdapter extends ArrayAdapter<Movie> {

Fragment fragment;
List<Movie> movies;

public MovieListArrayAdapter(Fragment fragment, @NonNull Context context, int resource, @NonNull List<Movie> movies) {
    super(context, resource, movies);
    this.fragment = fragment;
    this.movies = movies;
}

@NonNull
@Override
public View getView(int position, @Nullable View convertView, @NonNull ViewGroup parent) {
    Movie movie = movies.get(position);
    Movie top_movie = movies.get(0);

    if (convertView == null) {
        convertView = LayoutInflater.from(getContext()).inflate(R.layout.list_item, parent, false);
    }

    ImageView movie_imageview = convertView.findViewById(R.id.list_item_image);

    if (movie==top_movie) {
        convertView.setVisibility(View.VISIBLE);
        Glide.with(fragment.requireContext()).load(movie.getImage()).into(movie_imageview);
    } else {
        convertView.setVisibility(View.GONE);
    }

    return convertView;
}

Answer 1

您需要更新适配器中的列表。

movieListAdapter.addAll(movieList.getResults());
movieListAdapter.notifyDataSetChanged();