分别使用simpleAdapter和baseAdapter为ListView的Item添加按钮响应事件

       昨天在ListView Item上添加ImageButton时，发现item点击没响应，上网查找时发现有的文章认为不能使用simpleAdapter为ListView的item添加按钮响应事件，有的则认为simpleAdapter可以。下面一起解决这两个问题：

1.亲测可以分别使用simpleAdapter和baseAdapter为ListView的Item添加按钮响应事件。

（1）使用simpleAdapter为listView的item添加按钮响应事件

         MainActivity.java

package com.example.arrayadapter;import java.util.ArrayList;import java.util.HashMap;import java.util.Map;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.AdapterView;import android.widget.AdapterView.OnItemClickListener;import android.widget.ListView;import android.widget.Toast;/** * 继承simpleAdapter实现listView每个Item上面的按钮添加事件 * */public class MainActivity extends Activity {private ListView lv ;       //声明一个列表/* 显示ListView的两种方法：     * 1)在activity对应的布局里声明ListView控件，使用findViewById初始listView对象，最后listView.setAdapter显示listVIew     * 2)直接初始化ListVIew = new ListView(this),setAdapter后，通过setContentView(listView)把listView显示出来     */    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        lv = (ListView)findViewById(R.id.listview) ;       //        lv = new ListView(this) ;        //String[]的img 要和int[]的img名称一致        MySimpleAdapter adapter = new MySimpleAdapter(this,getData(),R.layout.item,        new String[]{"view1","view2","img","imageButton"},        new int[]{R.id.view1,R.id.view2,R.id.img,R.id.imageButton}) ;                lv.setAdapter(adapter) ;//        setContentView(lv) ;                //添加监听器      lv.setOnItemClickListener(new OnItemClickListener(){@Overridepublic void onItemClick(AdapterView<?> arg0, View arg1, int arg2,long arg3) {// TODO Auto-generated method stubToast.makeText(MainActivity.this, "点击的是ListView的item："+arg2, Toast.LENGTH_LONG).show() ;}            }) ;            }    private ArrayList<Map<String,Object>> getData()    {    ArrayList<Map<String,Object>> data = new ArrayList<Map<String,Object>>() ;    Map<String,Object> item ;    item = new HashMap<String,Object>() ;    item.put("view1", "张三") ;    item.put("view2", "23") ;    item.put("img", R.drawable.ic_launcher) ;    item.put("imageButton", R.drawable.ic_launcher) ;    data.add(item) ;    item = new HashMap<String,Object>() ;    item.put("view1", "李四") ;    item.put("view2", "20") ;    item.put("img", R.drawable.ic_launcher) ;    item.put("imageButton", R.drawable.ic_launcher) ;    data.add(item) ;    return data ;    }    @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroidManifest.xml.        int id = item.getItemId();        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }}

        MySimpleAdapter.java

package com.example.arrayadapter;import java.util.List;import java.util.Map;import android.content.Context;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.ImageButton;import android.widget.SimpleAdapter;import android.widget.Toast;public class MySimpleAdapter extends SimpleAdapter {Context context ;public MySimpleAdapter(Context context,List<? extends Map<String, ?>> data, int resource, String[] from,int[] to) {super(context, data, resource, from, to);this.context = context ; // TODO Auto-generated constructor stub}/* (non-Javadoc) * @see android.widget.SimpleAdapter#getView(int, android.view.View, android.view.ViewGroup) */@Overridepublic View getView(int position, View convertView, ViewGroup parent) {// TODO Auto-generated method stubView view= super.getView(position, convertView, parent);   ImageButton btn=(ImageButton) view.findViewById(R.id.imageButton);   btn.setTag(position);   btn.setOnClickListener(new OnClickListener() {        @Override    public void onClick(View v) {     // TODO Auto-generated method stub     Toast.makeText(getApplicationContext(), "点击的是ImageButton"+v.getTag(), 1).show();    }   });   return view;}protected Context getApplicationContext() {// TODO Auto-generated method stubreturn context;}}

        activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.example.arrayadapter.MainActivity" >    <!-- 点击ListView item空白地方没响应的原因：ListView的layout_width设置为“wrap_content”,应该为fill_parent或match_parent -->    <ListView          android:id="@+id/listview"          android:layout_width="match_parent"          android:layout_height="fill_parent" >      </ListView>  </LinearLayout>

        item.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:descendantFocusability="blocksDescendants"    android:orientation="horizontal" >    <ImageView        android:id="@+id/img"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/ic_launcher" />    <LinearLayout        android:layout_width="174dp"        android:layout_height="wrap_content"        android:layout_weight="1"        android:orientation="vertical" >        <TextView            android:id="@+id/view1"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:text="view1" />        <TextView            android:id="@+id/view2"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:text="view2" />    </LinearLayout>    <ImageButton        android:id="@+id/imageButton"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:clickable="true"        android:focusable="false"        android:gravity="right"        android:src="@drawable/ic_launcher" /></LinearLayout>

（2）使用baseAdapter为listView的item添加按钮响应事件

        MainActivity.java

 package com.example.listviewdemo;import java.util.ArrayList;import java.util.HashMap;import java.util.List;import java.util.Map;import android.app.Activity;import android.os.Bundle;import android.view.Menu;import android.view.MenuItem;import android.view.View;import android.widget.AdapterView;import android.widget.ArrayAdapter;import android.widget.ListView;import android.widget.Toast;import android.widget.AdapterView.OnItemClickListener;/** * @author Devel_000 *使用baseAdapter为listView的item添加按钮响应事件 */public class MainActivity extends Activity {private ListView lv ;       //声明一个列表ArrayList<Map<String,Object>> listData ;    @Override    protected void onCreate(Bundle savedInstanceState) {        super.onCreate(savedInstanceState);        setContentView(R.layout.activity_main);        lv = (ListView)findViewById(R.id.listview) ;        listData = getData() ;        MyAdapter myAdapter = new MyAdapter(this,listData) ;        lv.setAdapter(myAdapter) ;              //添加监听器        lv.setOnItemClickListener(new OnItemClickListener(){  @Override  public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,  long arg3) {  // TODO Auto-generated method stub  Toast.makeText(MainActivity.this, "点击的是ListView的item："+arg2, Toast.LENGTH_LONG).show() ;  }                }) ;    }    //Item的内容    private ArrayList<Map<String,Object>> getData()    {    ArrayList<Map<String,Object>> data = new ArrayList<Map<String,Object>>() ;    Map<String,Object> item ;    item = new HashMap<String,Object>() ;    item.put("view1", "张三") ;    item.put("view2", "23") ;    item.put("img", R.drawable.ic_launcher) ;    item.put("imageButton", R.drawable.ic_launcher) ;    data.add(item) ;    item = new HashMap<String,Object>() ;    item.put("view1", "李四") ;    item.put("view2", "20") ;    item.put("img", R.drawable.ic_launcher) ;    item.put("imageButton", R.drawable.ic_launcher) ;    data.add(item) ;    return data ;    }        @Override    public boolean onCreateOptionsMenu(Menu menu) {        // Inflate the menu; this adds items to the action bar if it is present.        getMenuInflater().inflate(R.menu.main, menu);        return true;    }    @Override    public boolean onOptionsItemSelected(MenuItem item) {        // Handle action bar item clicks here. The action bar will        // automatically handle clicks on the Home/Up button, so long        // as you specify a parent activity in AndroidManifest.xml.        int id = item.getItemId();        if (id == R.id.action_settings) {            return true;        }        return super.onOptionsItemSelected(item);    }}

     MyAdapter.java

package com.example.listviewdemo;import java.util.ArrayList;import java.util.Map;import android.content.Context;import android.view.LayoutInflater;import android.view.View;import android.view.View.OnClickListener;import android.view.ViewGroup;import android.widget.BaseAdapter;import android.widget.ImageButton;import android.widget.ImageView;import android.widget.TextView;import android.widget.Toast;public class MyAdapter extends BaseAdapter {private LayoutInflater mInflater ;private ArrayList<Map<String,Object>> listData ;private Context context ;public MyAdapter(Context context,ArrayList<Map<String,Object>> listData){mInflater = LayoutInflater.from(context) ;this.listData = listData ;this.context = context ;}@Overridepublic int getCount() {// TODO Auto-generated method stubreturn listData.size() ;}@Overridepublic Object getItem(int arg0) {// TODO Auto-generated method stubreturn null;}@Overridepublic long getItemId(int arg0) {// TODO Auto-generated method stubreturn 0;}//这里arg0被定义为final是java语法规范（Cannot refer to a non-final variable arg0 inside an inner class defined in a different method）@Overridepublic View getView(final int arg0, View arg1, ViewGroup arg2) {// TODO Auto-generated method stubViewHolder holder = null ;if(arg1 == null){holder = new ViewHolder() ;arg1 = mInflater.inflate(R.layout.item, null);//需要为每个控件指定内容，如指定textView的显示文字（这就是引用的listData作用）            holder.imageButton = (ImageButton)arg1.findViewById(R.id.imageButton) ;            holder.imageView = (ImageView)arg1.findViewById(R.id.img) ;            holder.textView1 = (TextView)arg1.findViewById(R.id.view1) ;            holder.textView1.setText(listData.get(arg0).get("view1").toString()) ;            holder.textView2 = (TextView)arg1.findViewById(R.id.view2) ;            holder.textView2.setText(listData.get(arg0).get("view2").toString()) ;arg1.setTag(holder) ;}else{holder = (ViewHolder)arg1.getTag();}holder.imageButton.setOnClickListener(new OnClickListener(){                @Override              public void onClick(View v) {                  // TODO Auto-generated method stub               Toast.makeText(getApplicationContext(), "点击的是ImageButton "+arg0, 1).show();            }});return arg1;}protected Context getApplicationContext() {// TODO Auto-generated method stubreturn context;}public class ViewHolder{public ImageView imageView ;public TextView textView1 ;public TextView textView2 ;public ImageButton imageButton ;}}

       activity_main.xml

<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    xmlns:tools="http://schemas.android.com/tools"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:paddingBottom="@dimen/activity_vertical_margin"    android:paddingLeft="@dimen/activity_horizontal_margin"    android:paddingRight="@dimen/activity_horizontal_margin"    android:paddingTop="@dimen/activity_vertical_margin"    tools:context="com.example.arrayadapter.MainActivity" >    <!-- 点击ListView item空白地方没响应的原因：ListView的layout_width设置为“wrap_content”,应该为fill_parent或match_parent -->    <ListView          android:id="@+id/listview"          android:layout_width="match_parent"          android:layout_height="fill_parent" >      </ListView>  </LinearLayout>

        item.xml

<?xml version="1.0" encoding="utf-8"?><LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"    android:layout_width="match_parent"    android:layout_height="match_parent"    android:descendantFocusability="blocksDescendants"    android:orientation="horizontal" >    <ImageView        android:id="@+id/img"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:src="@drawable/ic_launcher" />    <LinearLayout        android:layout_width="174dp"        android:layout_height="wrap_content"        android:layout_weight="1"        android:orientation="vertical" >        <TextView            android:id="@+id/view1"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:text="view1" />        <TextView            android:id="@+id/view2"            android:layout_width="match_parent"            android:layout_height="wrap_content"            android:text="view2" />    </LinearLayout>    <ImageButton        android:id="@+id/imageButton"        android:layout_width="wrap_content"        android:layout_height="wrap_content"        android:clickable="true"        android:focusable="false"        android:gravity="right"        android:src="@drawable/ic_launcher" /></LinearLayout>

运行截图：

在此过程中可能会遇到的问题（上述代码是可正常运行的，没有问题的）：

1.为listView添加button等控件时，点击item没响应：

解决方法：在ListView的Item的xml文件中添加如下属性：

                1）整个xml文件的根元素如LinearLayout中添加属性android:descendantFocusability="blocksDescendants"

                2）被点击的控件如ImageButton中添加属性android:focusable="false"和android:clickable="true"

2.点击listView item中的空白地方没响应：

解决方法：在含ListView的布局中将listView的layout_width设置为fill_parent或match_parent,而不是“wrap_content”

仅供参考