android ListView添加事件并获取选中项的值

android ListView添加事件并获取选中项的值，ListView是一个经常用到的控件，ListView里面的每个子项Item可以使一个字符串，也可以是一个组合控件。

main.xml代码如下：

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:orientation="vertical"  
    android:layout_width="fill_parent"  
    android:layout_height="fill_parent"  
    >  
<ListView  
    android:id="@+id/myListView"  
    android:layout_width="fill_parent"  
    android:layout_height="wrap_content"  
    />  
</LinearLayout>  

list_item.xml代码如下：

<?xml version="1.0" encoding="utf-8"?>  
<LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"  
    android:orientation="horizontal"  
    android:layout_width="fill_parent"  
    android:layout_height="fill_parent"  
    >  
<TextView  
    android:id="@+id/itemTitle"  
    android:layout_width="wrap_content"  
    android:layout_height="wrap_content"  
    android:textSize="22dip"  
    android:paddingRight="12dip"  
    />  
<TextView  
    android:id="@+id/itemContent"  
    android:layout_width="wrap_content"  
    android:layout_height="wrap_content"  
    android:textSize="22dip"  
    />  
</LinearLayout>  

activity MyListView.java代码如下：

package listview.pack;  
  
import java.util.ArrayList;  
import java.util.HashMap;  
import android.app.Activity;  
import android.os.Bundle;  
import android.view.View;  
import android.widget.AdapterView;  
import android.widget.AdapterView.OnItemClickListener;  
import android.widget.ListView;  
import android.widget.SimpleAdapter;  
import android.widget.Toast;  
  
public class MyListView extends Activity {  
    /** Called when the activity is first created. */  
    //声明ListView对象  
    ListView myListView;  
    @Override  
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        setContentView(R.layout.main);  
        //生成ListView对象  
        myListView=(ListView)findViewById(R.id.myListView);  
        //创建ArrayList对象 并添加数据  
        ArrayList<HashMap<String,String>> myArrayList=new ArrayList<HashMap<String,String>>();  
        for(int i=0;i<10;i++){  
            HashMap<String, String> map = new HashMap<String, String>();  
            map.put("itemTitle", "This Is Title "+i);  
            map.put("itemContent", "This Is Content "+i);  
            myArrayList.add(map);  
        }  
          
        //生成SimpleAdapter适配器对象  
        SimpleAdapter mySimpleAdapter=new SimpleAdapter(this,  
                myArrayList,//数据源  
                R.layout.list_items,//ListView内部数据展示形式的布局文件listitem.xml  
                new String[]{"itemTitle","itemContent"},//HashMap中的两个key值 itemTitle和itemContent  
                new int[]{R.id.itemTitle,R.id.itemContent});/*布局文件listitem.xml中组件的id    
                                                            布局文件的各组件分别映射到HashMap的各元素上，完成适配*/  
          
        myListView.setAdapter(mySimpleAdapter);  
        //添加点击事件  
        myListView.setOnItemClickListener(new OnItemClickListener(){  
            @Override  
            public void onItemClick(AdapterView<?> arg0, View arg1, int arg2,  
                    long arg3) {  
                //获得选中项的HashMap对象  
                HashMap<String,String> map=(HashMap<String,String>)myListView.getItemAtPosition(arg2);  
                String title=map.get("itemTitle");  
                String content=map.get("itemContent");  
                Toast.makeText(getApplicationContext(),   
                        "你选择了第"+arg2+"个Item，itemTitle的值是："+title+"itemContent的值是:"+content,  
                        Toast.LENGTH_SHORT).show();  
            }  
              
        });  
    }  
}