RecyclerView的点击事件添加-------接口回调的形式添加

Posted 2020-06-23 短暂的火光

  

 1 package com.example.recyclerviewdemo;
 2  
 3 import android.support.v7.widget.RecyclerView;
 4 import android.util.Log;
 5 import android.view.LayoutInflater;
 6 import android.view.View;
 7 import android.view.ViewGroup;
 8 import android.widget.TextView;
 9  
10 public class MyAdapter extends RecyclerView.Adapter<MyAdapter.ViewHolder> implements View.OnClickListener{
11     private  String[]  datas;
12     public MyAdapter(String[] datas) {
13         this.datas = datas;
14     }
15     private OnRecyclerViewItemClickListener mOnItemClickListener = null;
16      
17     //define interface
18     public static interface OnRecyclerViewItemClickListener {
19         void onItemClick(View view , String data);
20     }
21      
22     @Override
23     public ViewHolder onCreateViewHolder(ViewGroup viewGroup,  int viewType) {
24         View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.item, viewGroup, false);
25         ViewHolder vh = new ViewHolder(view);
26         //将创建的View注册点击事件
27         view.setOnClickListener(this);
28         return vh;
29     }
30      
31     @Override
32     public void onBindViewHolder(ViewHolder viewHolder,  int position) {
33         viewHolder.mTextView.setText(datas[position]);
34         //将数据保存在itemView的Tag中，以便点击时进行获取
35         viewHolder.itemView.setTag(datas[position]);
36     }
37   
38     @Override
39     public void onClick(View v) {
40         if (mOnItemClickListener != null) {
41             //注意这里使用getTag方法获取数据
42             mOnItemClickListener.onItemClick(v,(String)v.getTag());
43         }
44     }
45  
46     public void setOnItemClickListener(OnRecyclerViewItemClickListener listener) {
47         this.mOnItemClickListener = listener;
48     }
49  
50      
51     //获取数据的数量
52     @Override
53     public int getItemCount() {
54         return datas.length;
55     }
56     //自定义的ViewHolder，持有每个Item的的所有界面元素
57     public static class ViewHolder extends RecyclerView.ViewHolder {
58         public TextView mTextView;
59         public ViewHolder(View view){
60         super(view);
61             mTextView = (TextView) view.findViewById(R.id.text);
62         }
63     }
64 }

adapter

 1 import com.example.recyclerviewdemo.MyAdapter.OnRecyclerViewItemClickListener;
 2  
 3 import android.support.v7.app.ActionBarActivity;
 4 import android.support.v7.widget.LinearLayoutManager;
 5 import android.support.v7.widget.RecyclerView;
 6 import android.os.Bundle;
 7 import android.view.Menu;
 8 import android.view.MenuItem;
 9 import android.view.View;
10 import android.widget.Toast;
11  
12 public class MainActivity extends ActionBarActivity {
13     private RecyclerView mRecyclerView;
14     private LinearLayoutManager mLayoutManager;
15     private MyAdapter mAdapter;
16     private String[] data= new String[] {"aa","bb", "aa","bb", "aa","bb", "aa","bb", "aa","bb","aa","bb", "aa","bb", "aa","bb", "aa","bb", "aa","bb"  };
17      
18     @Override
19     protected void onCreate(Bundle savedInstanceState) {
20         super.onCreate(savedInstanceState);
21         setContentView(R.layout.activity_main);
22         mRecyclerView = (RecyclerView)findViewById(R.id.my_recycler_view);
23         //创建默认的线性LayoutManager
24         mLayoutManager = new LinearLayoutManager(this);
25         mRecyclerView.setLayoutManager(mLayoutManager);
26         //如果可以确定每个item的高度是固定的，设置这个选项可以提高性能
27         mRecyclerView.setHasFixedSize(true);
28         //创建并设置Adapter
29         mAdapter = new MyAdapter(data);
30         mRecyclerView.setAdapter(mAdapter);
31         mAdapter.setOnItemClickListener(new OnRecyclerViewItemClickListener(){
32             @Override    
33             public void onItemClick(View view , String data){
34                 Toast.makeText(MainActivity.this, data, 600).show();
35             }
36         });
37     }
38  
39     @Override
40     public boolean onCreateOptionsMenu(Menu menu) {
41         // Inflate the menu; this adds items to the action bar if it is present.
42         getMenuInflater().inflate(R.menu.main, menu);
43         return true;
44     }
45  
46     @Override
47     public boolean onOptionsItemSelected(MenuItem item) {
48         // Handle action bar item clicks here. The action bar will
49         // automatically handle clicks on the Home/Up button, so long
50         // as you specify a parent activity in AndroidManifest.xml.
51         int id = item.getItemId();
52         if (id == R.id.action_settings) {
53             return true;
54         }
55         return super.onOptionsItemSelected(item);
56     }
57       
58   
59 }

activity