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ListView给每个Item上面的按钮添加事件

程序员文章站 2022-05-31 08:35:25
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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:ListView给每个Item上面的按钮添加事件
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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相关标签: listview