Android完美处理RecyclerView实现item条目点击事件处理

版权声明：本文为博主原创文章，未经博主允许不得转载。 https://blog.csdn.net/codekxx/article/details/82779636

前言：

RecyclerView并没有像ListView那样提供了OnItemClick，OnItemLongClick等事件回调接口，所以，我们需要自己写接口去进行实现。

正题

①、创建接口类OnRecyclerViewClickListener

/**
 * RecyclerView条目点击接口
 * Created by kang on 2018/9/19.
 */

public interface OnRecyclerViewClickListener {
    void onItemClickListener(View view);
    void onItemLongClickListener(View view);
}

②、RecyclerView的Adapter中处理接口

• Adapter中创建方法setItemClickListener（）

private OnRecyclerViewClickListener listener;
public void setItemClickListener(OnRecyclerViewClickListener itemClickListener) {
     listener = itemClickListener;
}

• 在Adapter中onCreateViewHolder（）方法中将listener注册为Click回调监听

 @Override
    public FirstViewHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(context).inflate(R.layout.item_first,null);
        FirstViewHolder viewHolder = new FirstViewHolder(view);

        //接口回调
        if(listener != null){
            view.setOnClickListener(new View.OnClickListener() {
                @Override
                public void onClick(View v) {
                    listener.onItemClickListener(v);
                }
            });

            view.setOnLongClickListener(new View.OnLongClickListener() {
                @Override
                public boolean onLongClick(View v) {
                    listener.onItemLongClickListener(v);
                    return true;
                }
            });
        }

        return viewHolder;
    }

• 索引可以通过RecyclerView.getChildAdapterPosition获取到当前点击的Item的列表索引

int position = recyclerView.getChildAdapterPosition(view);

③、在Activity或Fragment中使用

FirstViewAdapter adapter = new FirstViewAdapter(context,strings);
        recyclerView.setLayoutManager(new GridLayoutManager(context,2));
        //添加Android自带的分割线
        recyclerView.addItemDecoration(new DividerItemDecoration(this,DividerItemDecoration.VERTICAL));
        recyclerView.setAdapter(adapter);

       adapter.setItemClickListener(new OnRecyclerViewClickListener() {
           @Override
           public void onItemClickListener(View view) {
               int position = recyclerView.getChildAdapterPosition(view);
               switch (position){
                   case 0:
                       startActivity(new Intent(context,MainActivity.class));
                       break;
                   case 1:
                       startActivity(new Intent(context,BottomNavigationActivity.class));
                       break;
                   case 2:
                       startActivity(new Intent(context,TopTabActivity.class));
                       break;
                   case 3:
                       startActivity(new Intent(context,ListActivity.class));
                       break;
                   case 4:
                       startActivity(new Intent(context,RecyclerViewActivity.class));
                       break;
                   case 5:
                       startActivity(new Intent(context,RefreshAndLoadMoreActivity.class));
                       break;
                   case 6:
                       startActivity(new Intent(context,TabStopActivity.class));
                       break;
                   case 7:
                       startActivity(new Intent(context,FragmentAndRecyclerActivity.class));
                       break;
               }
           }

           @Override
           public void onItemLongClickListener(View view) {

           }
       });