Question

我正在尝试在Android上实现onClick侦听器。当我点击时，我需要从GridLayoutManager获取一个特定项目的详细信息。 onClick有效，但它列出了数组列表中的所有项目。适配器类：

    public class MoviesGridAdapter extends RecyclerView.Adapter<MoviesGridAdapter.PosterViewHolder> {

    private Context context;
    private List<Movies> movieItems = new ArrayList<>();

    public MoviesGridAdapter(Context context, List<Movies> movieItems) {
        this.context = context;
        this.movieItems = movieItems;
    }

    @Override
    public PosterViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.movies_poster_grid_view_item, parent, false);
        return new PosterViewHolder(view);
    }

    @Override
    public void onBindViewHolder(PosterViewHolder holder, int position) {
        final Movies movies = movieItems.get(position);
        String posterUrlPath = movies.getPosterPath();

        Picasso.with(context)
                .load(Constants.MOVIE_POSTER_URL + posterUrlPath).into(holder.poster);

        holder.mView.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent intent = new Intent(context, MovieDetailsActivity.class);
                intent.putExtra("Title", movies.getTitle());
                intent.putExtra("Overview", movies.getOverview());
                context.startActivity(intent);
            }
        });
    }

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

    public class PosterViewHolder extends RecyclerView.ViewHolder {

        ImageView poster;
        final View mView;

        public PosterViewHolder(View itemView) {
            super(itemView);
            mView = itemView;
            poster = (ImageView) itemView.findViewById(R.id.movies_poster_mv);
        }

    }
    public void setMovies(List<Movies> movies) {
        movieItems.clear();
        movieItems = movies;
        notifyDataSetChanged();
    }

}

我在ViewHolder类上尝试了这一点，并使用API中声明的RecyclerView.ViewHolder扩展了getAdapterPosition()。我得到了另一个Activity / Fragment的意图，但我没有得到项目的位置点击而不是加载整个列表。这是Github project link。 ListView有OnItemClickListner或ArrayAdapter，RecyclerView缺乏功能。

提前感谢所有帮助。

Answer 1

将您的点击监听器放在 PosterViewHolder 中，就像我在下面的示例中所做的那样。

这是我项目的适配器，我的点击工作正常

  /**
     * Created by Rakshit on 7/20/2016.
     */
    public class MyWishListAdapter extends RecyclerView.Adapter<MyWishListAdapter.DataViewHolder> {

        private List<UserWishlist> mList;
        Activity mContext;
        MyWishListFragment fragment;

        public MyWishListAdapter(Activity mContext, MyWishListFragment fragment) {
            mList = new ArrayList<>();
            this.mContext = mContext;
            this.fragment = fragment;
        }


        @Override
        public DataViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
            View v = LayoutInflater.from(parent.getContext()).inflate(R.layout.my_wishlist_table_row_item, parent, false);
            Constants.setAppFont((ViewGroup) v, parent.getContext());
            DataViewHolder dataView = new DataViewHolder(v);
            return dataView;
        }

        @Override
        public void onBindViewHolder(final DataViewHolder holder, int position) {


        }

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

        public class DataViewHolder extends RecyclerView.ViewHolder implements APIServerResponse {



            public DataViewHolder(View v) {
                super(v);


                v.setOnClickListener(new View.OnClickListener() {
                    @Override
                    public void onClick(View v) {
                      //View click listener here  
                    }
                });     
    }
}

Answer 2

在ClickListener上实施

public class MoviesGridAdapter extends RecyclerView.Adapter<MoviesGridAdapter.PosterViewHolder> implements View.OnClickListener {

public PosterViewHolder(View itemView) {
            super(itemView);
           .......
            itemView.setOnClickListener(this);
        }

        @Override
        public void onClick(View v) {

           .......
        }

Answer 3

你的做法是错误的尝试这样的事情。

public class YourClassAdapter extends RecyclerView.Adapter<YourClassAdapter.YourClassViewHolder>
    implements View.OnClickListener {

private ArrayList<Object> objects;
private View.OnClickListener listener;

public YourClassAdapter(ArrayList<Object> objects) {
    this.objects = objects;
}

@Override
public YourClassViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
    View itemView = LayoutInflater.from(parent.getContext())
            .inflate(R.layout.your_layout, parent, false);

    itemView.setOnClickListener(this);

    return new YourClassViewHolder(itemView);
}

@Override
public void onBindViewHolder(YourClassViewHolder holder, int position) {
    Object object = objects.get(position);
    holder.bindObject(object);
}

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

public void setOnClickListener(View.OnClickListener listener) {
    this.listener = listener;
}

@Override
public void onClick(View view) {
    if(listener != null)
        listener.onClick(view);
}

public static class YourClassViewHolder extends RecyclerView.ViewHolder {

    public YourClassViewHolder(View itemView) {
        super(itemView);
    }

    public void bindObject(Object object) {

    }
}

}

在你的片段/活动中

yourClassAdapter.setOnClickListener(new View.OnClickListener() {
        @Override
        public void onClick(View v) {
            int position = recyclerView.getChildAdapterPosition(v);
            //Do your things
        }
    });

Android onClickItem无法在RecyclerView上运行

3 个答案: