获取点击的项目及其在 RecyclerView 中的位置 [英] Get clicked item and its position in RecyclerView

问题描述

我正在用 RecyclerView 替换我的 ListView，列表显示正常，但我想知道如何获取被点击的项目及其位置，类似于方法 OnItemClickListener.onItemClick(AdapterView parent, View v, int position, long id) 我们在 ListView 中使用.

I am replacing my ListView with RecyclerView, list showing ok, but I would like to know how to get clicked item and its position, similar to the method OnItemClickListener.onItemClick(AdapterView parent, View v, int position, long id) we use in ListView.

感谢您的想法！

推荐答案

基于链接:为什么 RecyclerView 没有 onItemClickListener()?以及 RecyclerView 与 Listview 有何不同?，还有@Duncan 的总体思路，我在这里给出我的解决方案:

Based on the link: Why doesn't RecyclerView have onItemClickListener()? and How RecyclerView is different from Listview?, and also @Duncan's general idea, I give my solution here:

• 定义一个接口RecyclerViewClickListener，用于将消息从适配器传递到Activity/Fragment:

• Define one interface RecyclerViewClickListener for a passing message from the adapter to Activity/Fragment:

  public interface RecyclerViewClickListener {
      public void recyclerViewListClicked(View v, int position);
  }

在Activity/Fragment中实现接口，并将监听器传递给适配器:

In Activity/Fragment implement the interface, and also pass listener to adapter:

  @Override
  public void recyclerViewListClicked(View v, int position){... ...}

  //set up adapter and pass clicked listener this
  myAdapter = new MyRecyclerViewAdapter(context, this);

在Adapter和ViewHolder中:

  public class MyRecyclerViewAdapter extends RecyclerView.Adapter<MyRecyclerViewAdapter.ItemViewHolder> {
     ... ... 
     private Context context;
     private static RecyclerViewClickListener itemListener;


     public MyRecyclerViewAdapter(Context context, RecyclerViewClickListener itemListener) {
         this.context = context;
         this.itemListener = itemListener;
         ... ...
     }


     //ViewHolder class implement OnClickListener, 
     //set clicklistener to itemView and, 
     //send message back to Activity/Fragment 
     public static class ItemViewHolder extends RecyclerView.ViewHolder implements View.OnClickListener{
         ... ...
         public ItemViewHolder(View convertView) {
             super(convertView);
             ... ...
             convertView.setOnClickListener(this);
         }

         @Override
         public void onClick(View v) {
             itemListener.recyclerViewListClicked(v, this.getPosition());     

         }
     }
  }

经过测试，一切正常.

[更新]

自 API 22 起，RecyclerView.ViewHolder.getPosition() 已被弃用，因此使用 getLayoutPosition().

Since API 22, RecyclerView.ViewHolder.getPosition() is deprecated, so instead with getLayoutPosition().

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