在嵌套的RecyclerView中实现OnClickListener（）和OnFocusChangeListener（）

Question

我在我的android应用程序中嵌套了RecyclerViews，我一直在努力实现OnClickListener和OnFocusChangeListener方法。我有以下3个文件来处理我的设置：

MainActivity

public class MainActivity extends AppCompatActivity {

    private RecyclerView mGenreRecycler;
    private GenreAdapter mGenreAdapter;


    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        //Bind the views of our RecyclerView
        bindViews();

        //Set up the Genre RecyclerView
        setUpGenreRecycler();

    }

    private void bindViews() {

        // Bind Genre recycler
        mGenreRecycler = findViewById(R.id.genre_recycler);
    }


    private void setUpGenreRecycler () {
        mGenreRecycler.setLayoutManager(newLinearLayoutManager(this,
        LinearLayoutManager.VERTICAL,false));

        // For smooth scrolling
        mGenreRecycler.setNestedScrollingEnabled(false);

        mGenreAdapter = new GenreAdapter(this, Genre.GenreList);
        mGenreRecycler.setAdapter(mGenreAdapter);
    }


}

GenreAdapter（RecyclerView垂直方向的第一级）

public class GenreAdapter extends RecyclerView.Adapter<GenreAdapter.GenreVH> {



private static int INITIAL_PREFETCH_COUNT = 3;

private Context context;
private List<Genre> genreList;
private LayoutInflater layoutInflater;
private SparseArray<GenreInnerAdapter> genreInnerAdapters;
private SparseArray<List<Movie>> genreWiseMovies;
private RecyclerView.RecycledViewPool recyclerViewPool;


public GenreAdapter(Context context, final List<Genre> genreList) {
    this.context = context;
    this.genreList = genreList;
    this.layoutInflater = LayoutInflater.from(context);

    recyclerViewPool = new RecyclerView.RecycledViewPool();

     // Initialize all adapters
    this.genreInnerAdapters = new SparseArray<>(genreList.size());
    for (Genre genre: genreList) {
            genreInnerAdapters.put(genre.getId(),new GenreInnerAdapter(context, newArrayList<Movie()));
        }

        // Send request for movie list
        this.genreWiseMovies = new SparseArray<>(genreList.size());
        populateGenreWiseMovies();
    }

    private void populateGenreWiseMovies() {
        ApiClient.TheMovieDBApiInterface service = ApiClient.getTheMovieDBApiInterface();
        for (final Genre genre:genreList) {
            Call<DiscoverResult> call = service.
            getTopMoviesByGenre(context.getString(R.string.api_key),
                    Constants.QueryDefaultVal.LANG,
                    Constants.QueryDefaultVal.REGION, Constants.QueryDefaultVal.SORT_BY,
                    Constants.QueryDefaultVal.CERT_COUNTRY, Constants.QueryDefaultVal.PAGE_NO,
                    2019, Collections.singletonList(genre.getId()));

            call.enqueue(new Callback<DiscoverResult>() {
                @Override
                public void onResponse(Call<DiscoverResult> call, Response<DiscoverResult> response) 
                {
                    List<Movie> movieList = response.body().getResults();
                    genreWiseMovies.put(genre.getId(),movieList);

                    genreInnerAdapters.get(genre.getId()).setMovieList(movieList);
                    genreInnerAdapters.get(genre.getId()).notifyDataSetChanged();
                    Log.d("MainActivity", "movie list size for genre " +
                            genre.getName() + ":" + movieList.size());
                }

                @Override
                public void onFailure(Call<DiscoverResult> call, Throwable t) {
                    Log.e("GenreAdapter", "unable to get movies by genre: " +
                            genre.getName() + " error: " + t.getMessage());
                }
            });
        }
    }

    @Override
    public GenreVH onCreateViewHolder(ViewGroup parent, int viewType) {View view = layoutInflater.inflate(R.layout.genere_unit, parent, false);
        GenreVH genreVH = new GenreVH(view);
        genreVH.genreInnerRecycler.setRecycledViewPool(recyclerViewPool);
        genreVH.genreInnerRecycler.setNestedScrollingEnabled(false);
        return genreVH;
    }

    @Override
    public void onBindViewHolder(GenreVH holder, int position) {
        /* Set Genre Heading */
        holder.genreHeading.setText(genreList.get(position).getName());

        /* set layout manager to inner recycler*/
        if(holder.genreInnerRecycler.getLayoutManager() == null){
            LinearLayoutManager linearLayoutManager = new LinearLayoutManager(context,
                    LinearLayoutManager.HORIZONTAL, false);
            linearLayoutManager.setInitialPrefetchItemCount(INITIAL_PREFETCH_COUNT);
            holder.genreInnerRecycler.setLayoutManager(linearLayoutManager);

        }

        /* set adapter to inner recycler */
      holder.genreInnerRecycler.setAdapter(genreInnerAdapters.get(genreList.get(position).getId()));

    }

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

    public class GenreVH extends RecyclerView.ViewHolder  {
        private TextView genreHeading;
        private RecyclerView genreInnerRecycler;

        public GenreVH(View itemView) {
            super(itemView);
            genreHeading = itemView.findViewById(R.id.genre_heading);
            genreInnerRecycler = itemView.findViewById(R.id.genre_inner_recycler);

        }


    }
}

GenreInnerAdapter（嵌套的RecyclerView方向为水平）

public class GenreInnerAdapter extends RecyclerView.Adapter<GenreInnerAdapter.GenreInnerVH> {

private Context context;
private List<Movie> movieList;
private LayoutInflater layoutInflater;
private String imageBaseUrl = "https://image.tmdb.org/t/p/w500/";


public GenreInnerAdapter(Context context, List<Movie> movieList) {
    this.context = context;
    this.movieList = movieList;
    this.layoutInflater = LayoutInflater.from(context);
}

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

@Override
public GenreInnerVH onCreateViewHolder(ViewGroup parent, int viewType) {
    View view = layoutInflater.inflate(R.layout.genere_inner_unit, parent, false);
    return new GenreInnerVH(view);
}

@Override
public void onBindViewHolder(GenreInnerVH holder, int position) {
    String bannerImageUrl = imageBaseUrl + movieList.get(position).getPosterPath();

    Glide.with(context)
            .load(bannerImageUrl)
            .fallback(R.drawable.genre_image_fallback)
            .error(R.drawable.genre_image_fallback)
            .diskCacheStrategy(DiskCacheStrategy.ALL)
            .into(holder.movieBanner);

}

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

public class GenreInnerVH extends RecyclerView.ViewHolder {

    private ImageView movieBanner;
    private TextView movieTitle;

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

        movieBanner = itemView.findViewById(R.id.genre_movie_image);
        movieTitle = itemView.findViewById(R.id.genre_movie_title);


        }

}
}

我想返回具有焦点或被单击的视图的movieTitle内容。有人可以为如何实现此目的提供建议，也可以修改代码以使其难以理解其实现方式吗？