java - 从 Android Studio 中的 fragment 中单击 recyclerview 中的cardview

Question

我正在创建一个电影应用程序用于学习目的。我在单击卡片 View 以将我从 fragment 引导至另一个 Activity 时遇到问题。

目前，我有一个 fragment ，可以通过改造显示来自 api 的电影。用于处理处理的适配器和用于单击事件的接口(interface)。

这是适配器

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

    private String IMAGE_BASE_URL = "https://image.tmdb.org/t/p/w500/";
    private List<Movie> movieList;
    private OnRecyclerViewItemClickListener onRecyclerViewItemClickListener;

    public MoviesAdapter(List<Movie> movieList){
        this.movieList = movieList;
    }

    @NonNull
    @Override
    public MoviesAdapter.ViewHolder onCreateViewHolder(@NonNull ViewGroup viewGroup, int i) {
        View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.movie_card, viewGroup, false);
        return new MoviesAdapter.ViewHolder(view);
    }

    @Override
    public void onBindViewHolder(@NonNull MoviesAdapter.ViewHolder movieViewHolder, int i) {
        movieViewHolder.bind(movieList.get(i));
    }

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


    public class ViewHolder extends RecyclerView.ViewHolder {
        ImageView poster;
        TextView movietitle, moviereleasedate, movierating;
        LinearLayout linearLayout;
        public ViewHolder(@NonNull View itemView) {
            super(itemView);
            poster = itemView.findViewById(R.id.cardview_image);
            movietitle = itemView.findViewById(R.id.cardview_movietitle);
            moviereleasedate = itemView.findViewById(R.id.cardview_releasedate);
            movierating = itemView.findViewById(R.id.cardview_rating);
            linearLayout = itemView.findViewById(R.id.movie_cardview_linearlayout);
        }
        public void bind(Movie movie){
            movietitle.setText(movie.getTitle());
            moviereleasedate.setText(movie.getReleaseDate().split("-")[0]);
            movierating.setText(String.valueOf(movie.getRating()));
            Picasso.get()
                    .load(IMAGE_BASE_URL+movie.getPosterPath())
                    .resize(96,128)
                    .placeholder(R.color.colorNotSelected)
                    .error(R.drawable.ic_launcher_foreground)
                    .into(poster);
            linearLayout.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    if (onRecyclerViewItemClickListener != null)
                        onRecyclerViewItemClickListener.onItemClick(getAdapterPosition(),v);
                }
            });
        }
    }
    public void setOnRecyclerViewItemClickListener(OnRecyclerViewItemClickListener onRecyclerViewItemClickListener){
        this.onRecyclerViewItemClickListener = onRecyclerViewItemClickListener;
    }
}

下面是点击界面

public interface OnRecyclerViewItemClickListener {
    void onItemClick(int adapterPosition, View view);
}

下面是 fragment 类

 public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        // Inflate the layout for this fragment
        final View view = inflater.inflate(R.layout.fragment_now_playing, container, false);

        //Initialization of layout
        ll = view.findViewById(R.id.movie_cardview_linearlayout);
        recyclerView = view.findViewById(R.id.recyclerView_now_playing_fragment);
        final LinearLayoutManager linearLayoutManager = new LinearLayoutManager(getActivity(), LinearLayoutManager.VERTICAL,false);
        recyclerView.setLayoutManager(linearLayoutManager);

        //Getting retrofit client
        final Service service = Client.getClient().create(Service.class);
        Call<MoviesResponse> call = service.getNowPlayingMovies(BuildConfig.THE_MOVIE_DB_API_TOKEN);

        //getting data
        call.enqueue(new Callback<MoviesResponse>() {
            @Override
            public void onResponse(Call<MoviesResponse> call, Response<MoviesResponse> response) {
                if (response.isSuccessful()){
                    List<Movie> movies = response.body().getMovies();
                    if (movies.size()>0){
                        final MoviesAdapter moviesAdapter = new MoviesAdapter(movies);
                        // Click does not work
                        // If I did it from activity I just put context of activity as an argument
                        moviesAdapter.setOnRecyclerViewItemClickListener(//);
                        recyclerView.setAdapter(moviesAdapter);
                    }
                }
            }

            @Override
            public void onFailure(Call<MoviesResponse> call, Throwable t) {
                Log.e(TAG, "onFailure: ", t);
            }
        });

        return view;
    }



    @Override
    public void onItemClick(int adapterPosition, View view) {
        switch (view.getId()){
            case R.id.main_cardview:
                Toast.makeText(getActivity(), "Card View Clicked", Toast.LENGTH_SHORT).show();
                break;
        }
    }
}

我也直接从fragment中的cardview中点击，但失败了

它应该至少举杯作为测试。

谢谢。

Answer 1

请尝试这个。

@Override
        public void onItemClick(int adapterPosition, View view) {
            switch (view.getId()){
                case R.id.movie_cardview_linearlayout:
                    Toast.makeText(getActivity(), "Card View Clicked", Toast.LENGTH_SHORT).show();
                    break;
            }
        }