为ListView每个Item上面的按钮添加事件-PHP开发-php.cn

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为ListView每个Item上面的按钮添加事件

高洛峰

Dec 13, 2016 pm 04:55 PM

先看下效果图：

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）：

//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();  
    }

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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;  
    }

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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<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();  
    }  
      
      
}

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2.main.xml

<?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>

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3.vlist.xml

<?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>

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4.btn_detail_selecter.xml

<?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>

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5.item.xml

<?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>

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6.colors.xml

<?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>

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7.values.xml

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

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8.drawables.xml

<?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>

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