Question

在onLoadFinsih我从服务器上回来了我想要的电影

将此列表添加到我的RecyclerView适配器

我尝试创建电影列表并将其传递给我的RecyclerView适配器然后当我在onLoadFinish方法中从服务器获取电影列表时，我添加这个列表到我在适配器中传递的列表然后通知适配器但没有工作

public class MainActivity extends AppCompatActivity
    implements LoaderManager.LoaderCallbacks<List<Movie>>{

        private RecyclerView.Adapter movieRecyclerViewAdapter;
        private RecyclerView.LayoutManager mLayoutManager;
        private List<Movie> mListOfMovies;
@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    progressBar = (ProgressBar) findViewById(R.id.progress_bar);

    RecyclerView recyclerView = (RecyclerView) findViewById(R.id.recycler_view);

    mListOfMovies = new ArrayList<>();

    movieRecyclerViewAdapter = new MovieItemAdapter(this, mListOfMovies);
    mLayoutManager = new LinearLayoutManager(this);

    recyclerView.setAdapter(movieRecyclerViewAdapter);

}
@Override
public void onLoadFinished(Loader<List<Movie>> loader, List<Movie> movies) {
    //hide progress bar after fetch data from server
    progressBar.setVisibility(View.GONE);

    mListOfMovies.clear();

    mListOfMovies.addAll(movies);

    movieRecyclerViewAdapter.notifyItemRangeChanged();

}



public class MovieItemAdapter extends RecyclerView.Adapter<MovieItemAdapter.ViewHolder> {

private List<Movie> mListOfMovies;
private Context mContext;

public MovieItemAdapter(Context context, List<Movie> movies) {
    this.mListOfMovies = movies;
    this.mContext = context;
}

@Override
public ViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = LayoutInflater.from(mContext)
            .inflate(R.layout.movie_list_item, parent, false);
    ViewHolder viewHolder = new ViewHolder(view);
    return viewHolder;
}

@Override
public void onBindViewHolder(ViewHolder holder, int position) {
    Movie movieItem = mListOfMovies.get(position);

    holder.moviePoster.setImageBitmap(movieItem.getBitmap());
    holder.movieName.setText(movieItem.getTitle());

    DecimalFormat format = new DecimalFormat("0.0");
    holder.voteAverage.setText(format.format(movieItem.getVoteAverage()));
    holder.releaseDate.setText(movieItem.getReleaseDate());
}

@Override
public int getItemCount() {
    return mListOfMovies.size();
}

public static class ViewHolder extends RecyclerView.ViewHolder {

    public ImageView moviePoster;
    public TextView movieName;
    public TextView voteAverage;
    public TextView releaseDate;

    public ViewHolder(View itemView) {
        super(itemView);

        moviePoster = (ImageView) itemView.findViewById(R.id.movie_poster);
        movieName = (TextView) itemView.findViewById(R.id.movie_name);
        voteAverage = (TextView) itemView.findViewById(R.id.vote_average);
        releaseDate = (TextView) itemView.findViewById(R.id.release_date);
    }
}

}

Answer 1

使适配器类中的ViewHolder类非静态。然后再次检查。

Answer 2

在onLoadFinish()中，您应该使用收到的数据更新适配器中的列表。

然后你应该调用适配器adapter.notifyDataSetChanged()。

编辑：

在适配器中创建方法，如

setMovieList(List<Movie> movies){
    mListOfMovies = movies;
    this.notifyDataSetChanged();
}

并从onLoadFinished()：

调用它

movieRecyclerViewAdapter.setMovieList(mListOfMovies)

如何将项目列表添加到我的RecyclerView适配器

2 个答案: