android为ListView每个Item上面的按钮添加事件

本文介绍了ListView给每个Item上面的按钮添加事件,具体如下:

1.先看下效果图:


在这里仅供测试,我把数据都写死了,根据需要可以自己进行修改,此外实现ListView上面每个Item上的Button的事件有两种方法:

1.使用final变量扩展局部变量的生命周期范围主要代码(本文最后附全部代码):


//注意原本getView方法中的int position变量是非final的,现在改为final 
    @Override 
    public View getView(final int position, View convertView, ViewGroup parent) { 
       ViewHolder holder = null; 
      if (convertView == null) { 
         
        holder=new ViewHolder();  
         
        //可以理解为从vlist获取view 之后把view返回给ListView 
        convertView = mInflater.inflate(R.layout.vlist, null); 
        holder.title = (TextView)convertView.findViewById(R.id.title); 
        holder.info = (TextView)convertView.findViewById(R.id.info); 
        holder.viewBtn = (Button)convertView.findViewById(R.id.view_btn); 
        convertView.setTag(holder);        
      }else {        
        holder = (ViewHolder)convertView.getTag(); 
      }     
       
      holder.title.setText((String)mData.get(position).get("title")); 
      holder.info.setText((String)mData.get(position).get("info")); 
      holder.viewBtn.setTag(position); 
      //给Button添加单击事件 添加Button之后ListView将失去焦点 需要的直接把Button的焦点去掉 
      holder.viewBtn.setOnClickListener(new View.OnClickListener() { 
         
        @Override 
        public void onClick(View v) { 
          showInfo(position);          
        } 
      }); 
       
      //holder.viewBtn.setOnClickListener(MyListener(position)); 
           
      return convertView; 
    } 
  } 
   
  //提取出来方便点 
  public final class ViewHolder { 
    public TextView title; 
    public TextView info; 
    public Button viewBtn; 
  } 
  public void showInfo(int position){ 
     
    ImageView img=new ImageView(ListViewActivity.this); 
    img.setImageResource(R.drawable.b); 
    new AlertDialog.Builder(this).setView(img) 
    .setTitle("详情"+position) 
    .setMessage("菜名:"+title[position]+"  价格:"+info[position]) 
    .setPositiveButton("确定", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface dialog, int which) { 
      } 
    }) 
    .show(); 
  } 

2.使用类记录每个Button的位置,使每个BUTTON都有自己的Listener主要代码:


//****************************************第二种方法,高手一般都用此种方法,具体原因,我还不清楚,有待研究 
   
    public View getView(int position, View convertView, ViewGroup parent) { 
       ViewHolder holder = null; 
       MyListener myListener=null; 
      if (convertView == null) { 
         
        holder=new ViewHolder();  
         
        //可以理解为从vlist获取view 之后把view返回给ListView 
         myListener=new MyListener(position); 
           
        convertView = mInflater.inflate(R.layout.vlist, null); 
        holder.title = (TextView)convertView.findViewById(R.id.title); 
        holder.info = (TextView)convertView.findViewById(R.id.info); 
        holder.viewBtn = (Button)convertView.findViewById(R.id.view_btn); 
        convertView.setTag(holder);        
      }else {        
        holder = (ViewHolder)convertView.getTag(); 
      }     
       
      holder.title.setText((String)mData.get(position).get("title")); 
      holder.info.setText((String)mData.get(position).get("info")); 
      holder.viewBtn.setTag(position); 
      //给Button添加单击事件 添加Button之后ListView将失去焦点 需要的直接把Button的焦点去掉 
      holder.viewBtn.setOnClickListener( myListener); 
       
      //holder.viewBtn.setOnClickListener(MyListener(position)); 
           
      return convertView; 
    } 
  } 
   
   private class MyListener implements OnClickListener{ 
      int mPosition; 
      public MyListener(int inPosition){ 
        mPosition= inPosition; 
      } 
      @Override 
      public void onClick(View v) { 
        // TODO Auto-generated method stub 
        Toast.makeText(ListViewActivity.this, title[mPosition], Toast.LENGTH_SHORT).show(); 
      } 
       
    } 
 
   
  //提取出来方便点 
  public final class ViewHolder { 
    public TextView title; 
    public TextView info; 
    public Button viewBtn; 
  } 

3.全部代码

1.ListViewActivity.Java全部代码:


package ms.ListView; 
 
import java.util.ArrayList; 
import java.util.HashMap; 
import java.util.List; 
import java.util.Map; 
 
import android.app.Activity; 
import android.app.AlertDialog; 
import android.content.Context; 
import android.content.DialogInterface; 
import android.os.Bundle; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.View.OnClickListener; 
import android.view.ViewGroup; 
import android.widget.AdapterView; 
import android.widget.AdapterView.OnItemSelectedListener; 
import android.widget.BaseAdapter; 
import android.widget.Button; 
import android.widget.ImageView; 
import android.widget.ListView; 
import android.widget.TextView; 
import android.widget.Toast; 
 
public class ListViewActivity extends Activity { 
  /** Called when the activity is first created. */ 
  private List> mData; 
  private int flag; 
  public static String title[]=new String[]{"菜名0","菜名1","菜名2","菜名3","菜名4","菜名5","菜名6","菜名7","菜名8","菜名9"}; 
  public static String info[]=new String[]{ "¥:28","¥:28","¥:28","¥:28","¥:28","¥:28","¥:28","¥:28","¥:28","¥:28",}; 
   
 
  @Override 
  public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.main); 
    mData = getData(); 
    ListView listView = (ListView) findViewById(R.id.listView); 
    MyAdapter adapter = new MyAdapter(this); 
    listView.setAdapter(adapter); 
     
     
  } 
 
 
 
  //获取动态数组数据 可以由其他地方传来(json等) 
  private List> getData() { 
    List> list = new ArrayList>(); 
for(int i=0;i map = new HashMap(); 
    map.put("title", title[i]); 
    map.put("info", info[i]); 
    list.add(map); 
} 
 
    return list; 
  } 
 
  public class MyAdapter extends BaseAdapter { 
 
    private LayoutInflater mInflater; 
 
    public MyAdapter(Context context) { 
      this.mInflater = LayoutInflater.from(context); 
    } 
 
    @Override 
    public int getCount() { 
      // TODO Auto-generated method stub 
      return mData.size(); 
    } 
 
    @Override 
    public Object getItem(int position) { 
      // TODO Auto-generated method stub 
      return null; 
    } 
 
    @Override 
    public long getItemId(int position) { 
      // TODO Auto-generated method stub 
      return 0; 
    } 
    //****************************************final方法 
//注意原本getView方法中的int position变量是非final的,现在改为final 
    @Override 
    public View getView(final int position, View convertView, ViewGroup parent) { 
       ViewHolder holder = null; 
      if (convertView == null) { 
         
        holder=new ViewHolder();  
         
        //可以理解为从vlist获取view 之后把view返回给ListView 
         
        convertView = mInflater.inflate(R.layout.vlist, null); 
        holder.title = (TextView)convertView.findViewById(R.id.title); 
        holder.info = (TextView)convertView.findViewById(R.id.info); 
        holder.viewBtn = (Button)convertView.findViewById(R.id.view_btn); 
        convertView.setTag(holder);        
      }else {        
        holder = (ViewHolder)convertView.getTag(); 
      }     
       
      holder.title.setText((String)mData.get(position).get("title")); 
      holder.info.setText((String)mData.get(position).get("info")); 
      holder.viewBtn.setTag(position); 
      //给Button添加单击事件 添加Button之后ListView将失去焦点 需要的直接把Button的焦点去掉 
      holder.viewBtn.setOnClickListener(new View.OnClickListener() { 
         
        @Override 
        public void onClick(View v) { 
          showInfo(position);          
        } 
      }); 
       
      //holder.viewBtn.setOnClickListener(MyListener(position)); 
           
      return convertView; 
    } 
  } 
    //****************************************第二种方法,高手一般都用此种方法,具体原因,我还不清楚,有待研究 
   
//   public View getView(int position, View convertView, ViewGroup parent) { 
//      ViewHolder holder = null; 
//      MyListener myListener=null; 
//     if (convertView == null) { 
//        
//       holder=new ViewHolder();  
//        
//       //可以理解为从vlist获取view 之后把view返回给ListView 
//        myListener=new MyListener(position); 
//          
//       convertView = mInflater.inflate(R.layout.vlist, null); 
//       holder.title = (TextView)convertView.findViewById(R.id.title); 
//       holder.info = (TextView)convertView.findViewById(R.id.info); 
//       holder.viewBtn = (Button)convertView.findViewById(R.id.view_btn); 
//       convertView.setTag(holder);        
//     }else {        
//       holder = (ViewHolder)convertView.getTag(); 
//     }     
//      
//     holder.title.setText((String)mData.get(position).get("title")); 
//     holder.info.setText((String)mData.get(position).get("info")); 
//     holder.viewBtn.setTag(position); 
//     //给Button添加单击事件 添加Button之后ListView将失去焦点 需要的直接把Button的焦点去掉 
//     holder.viewBtn.setOnClickListener( myListener); 
//      
//     //holder.viewBtn.setOnClickListener(MyListener(position)); 
//          
//     return convertView; 
//   } 
// } 
//  
//  private class MyListener implements OnClickListener{ 
//     int mPosition; 
//     public MyListener(int inPosition){ 
//       mPosition= inPosition; 
//     } 
//     @Override 
//     public void onClick(View v) { 
//       // TODO Auto-generated method stub 
//       Toast.makeText(ListViewActivity.this, title[mPosition], Toast.LENGTH_SHORT).show(); 
//     } 
//      
//   } 
// 
//  
   
   
   
   
   
   
   
   
  //提取出来方便点 
  public final class ViewHolder { 
    public TextView title; 
    public TextView info; 
    public Button viewBtn; 
  } 
  public void showInfo(int position){ 
     
    ImageView img=new ImageView(ListViewActivity.this); 
    img.setImageResource(R.drawable.b); 
    new AlertDialog.Builder(this).setView(img) 
    .setTitle("详情"+position) 
    .setMessage("菜名:"+title[position]+"  价格:"+info[position]) 
    .setPositiveButton("确定", new DialogInterface.OnClickListener() { 
      @Override 
      public void onClick(DialogInterface dialog, int which) { 
      } 
    }) 
    .show(); 
  } 
   
   
} 

2.main.xml


 
 
 
  

  3.vlist.xml


 
 
 
  

4.btn_detail_selecter.xml


 
 
 
  

5.item.xml


 
 
 
  

6.colors.xml


 
 
  #8000ff00 
  #ff23323b 
  #ff848f9b 
  #ffffffff 
 

7.values.xml


 
 
 
  Hello World, ListViewActivity! 
  ListView 
 
 

8.drawables.xml


 
 
  #80000000 
  #00000000 
  #ffcfe1ed 
  #30ffffff 
  #50ffffff 
  #30000000 
 

源码下载:源码下载地址

原文链接:http://blog.csdn.net/qq435757399/article/details/8256453

以上就是本文的全部内容,希望对大家的学习有所帮助,也希望大家多多支持脚本之家。

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