ListView给每个Item上面的按钮添加事件

其他 2018-06-14 12:07:35 阅读次数: 0

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）：

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//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：

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//****************************************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：

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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<Map<String, Object>> 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<Map<String, Object>> getData() {
     List<Map<String, Object>> list = new ArrayList<Map<String, Object>>();
for ( int i= 0 ;i<title.length;i++){
     Map<String, Object> map = new HashMap<String, Object>();
     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

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<? xml version = "1.0" encoding = "utf-8" ?>
< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"
   android:layout_width = "fill_parent"
   android:layout_height = "fill_parent"
   android:orientation = "vertical" >
  
   < ListView 
     android:id = "@+id/listView"
     android:layout_width = "fill_parent"
     android:layout_height = "fill_parent"
     android:divider = "@drawable/list_line"
     android:dividerHeight = "1dip" />
  
</ LinearLayout >

  3.vlist.xml

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<? xml version = "1.0" encoding = "utf-8" ?>
< LinearLayout xmlns:android = "http://schemas.android.com/apk/res/android"
   android:layout_width = "fill_parent"
   android:layout_height = "fill_parent"
   android:orientation = "vertical" >
  
   < ListView 
     android:id = "@+id/listView"
     android:layout_width = "fill_parent"
     android:layout_height = "fill_parent"
     android:divider = "@drawable/list_line"
     android:dividerHeight = "1dip" />
  
</ LinearLayout >

4.btn_detail_selecter.xml

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<? xml version = "1.0" encoding = "utf-8" ?>
< selector xmlns:android = "http://schemas.android.com/apk/res/android" >
  
   < item android:drawable = "@drawable/btn_detail_normal" android:state_enabled = "true" android:state_focused = "false" android:state_pressed = "false" />
   < item android:drawable = "@drawable/btn_detail_pressed" android:state_enabled = "true" android:state_pressed = "true" />
   < item android:drawable = "@drawable/btn_detail_pressed" android:state_enabled = "true" android:state_focused = "true" />
  
</ selector >

5.item.xml

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<? xml version = "1.0" encoding = "UTF-8" ?>
< selector xmlns:android = "http://schemas.android.com/apk/res/android" >
  
   < item android:drawable = "@drawable/item_higlight" android:state_focused = "true" android:state_pressed = "false" />
   < item android:drawable = "@drawable/item_higlight" android:state_focused = "false" android:state_pressed = "true" />
   < item android:drawable = "@drawable/item_higlight" android:state_selected = "true" />
   < item android:drawable = "@drawable/item_higlight" android:state_focused = "true" />
   < item android:drawable = "@drawable/item_higlight" />
  
</ selector >

6.colors.xml

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<? xml version = "1.0" encoding = "UTF-8" ?>
< resources >
   < color name = "region" >#8000ff00</ color >
   < color name = "listTitle" >#ff23323b</ color >
   < color name = "text" >#ff848f9b</ color >
   < color name = "write" >#ffffffff</ color >
</ resources >

7.values.xml

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<? xml version = "1.0" encoding = "utf-8" ?>
< resources >
  
   < string name = "hello" >Hello World, ListViewActivity!</ string >
   < string name = "app_name" >ListView</ string >
  
</ resources >

8.drawables.xml

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<? xml version = "1.0" encoding = "UTF-8" ?>
< resources >
   < item type = "drawable" name = "bg" >#80000000</ item >
   < item type = "drawable" name = "transparent" >#00000000</ item >
   < item type = "drawable" name = "lightblue" >#ffcfe1ed</ item >
   < item type = "drawable" name = "readmenu_btn_bg_f" >#30ffffff</ item >
   < item type = "drawable" name = "readmenu_btn_bg_p" >#50ffffff</ item >
   < item type = "drawable" name = "blackMask" >#30000000</ item >
</ resources >

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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