ListView应用------ListView控件显示List集合中的数据，并对Item响应选择事件(法二)

本方法，采用继承ListActivity，来实现的，需要注意的是，在配置文件中ListView的ID书写方式@id/android:list

以及在对应的Activity中通过调用setListAdapter(adapter);实现数据填充；简化代码书写。

item.xml

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 <?xml version="1.0" encoding="utf-8"?>  
   <LinearLayout android:orientation="horizontal"  
     android:layout_width="fill_parent"  
     android:layout_height="fill_parent"  
     android:paddingLeft="10dp"  
     android:paddingRight="10dp"  
     android:paddingTop="1dp"  
     android:paddingBottom="1dp"  
     xmlns:android="http://schemas.android.com/apk/res/android" >  
         <TextView   
             android:id="@+id/scoreId"  
             android:layout_width="60dip"  
             android:layout_height="30dip"   
             android:textSize="10pt"  
             android:singleLine="true"/>  
         <TextView android:id="@+id/userName"   
             android:layout_width="80dip"  
             android:layout_height="30dip"   
             android:textSize="10pt"  
             android:singleLine="true"/>  
         <TextView android:id="@+id/userScore"   
             android:layout_width="80dip"  
             android:layout_height="30dip"   
             android:textSize="10pt"  
             android:singleLine="true"/>  
   </LinearLayout>  

scorelist.xml

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

public class ScoreListActivity extendsListActivity{

   @Override
   protected void onCreate(Bundle savedInstanceState) {
       super.onCreate(savedInstanceState);
       setContentView(R.layout.scorelist);

       ScoreDao scoreDao=new ScoreDao(ScoreListActivity.this);
       List<UserScore> userScores=scoreDao.getAllScore();
       ArrayList<HashMap<String,Object>> list=new ArrayList<HashMap<String,Object>>();
       for (UserScore userScore : userScores) {
           HashMap <String,Object> map=new HashMap <String,Object>();
           map.put("scoreId", userScore.getId());
           map.put("userName", userScore.getUserName());
           map.put("userScore", userScore.getUserScore());
           list.add(map);
       }
       SimpleAdapter adapter=new SimpleAdapter(ScoreListActivity.this,
               list,R.layout.item, new String[]{"scoreId","userName","userScore"},
               new int[]{R.id.scoreId,R.id.userName,R.id.userScore});
       setListAdapter(adapter);

   }
    //重写ListActivity中的onListItemClick()方法
   @Override
   protected void onListItemClick(ListView listView, View view, int position, long id) {
       super.onListItemClick(listView, view, position, id);
       HashMap<String, Object> item = (HashMap<String, Object>)listView.getItemAtPosition(position);
       //获取被选中行对应的ID
        Object scoreId=item.get("scoreId");
        Toast.makeText(ScoreListActivity.this,scoreId.toString(), Toast.LENGTH_LONG).show();
   }