ListActivity的注意点

 1 <?xml version="1.0" encoding="utf-8"?>
 2 <LinearLayout xmlns:android="http://schemas.android.com/apk/res/android"
 3     android:layout_width="fill_parent"
 4     android:layout_height="fill_parent"
 5     android:orientation="vertical" >
 6 
 7     <ListView
 8         android:id="@id/android:list"
 9         android:layout_width="match_parent"
10         android:layout_height="wrap_content" />
11 
12 </LinearLayout>

 1 package tjuci.edu.dl;
 2 
 3 import android.app.Activity;
 4 import android.app.ListActivity;
 5 import android.os.Bundle;
 6 import android.view.View;
 7 import android.widget.ArrayAdapter;
 8 import android.widget.ListView;
 9 
10 public class ListViewDemo extends ListActivity {
11     String[] str = { "wyl", "zhangyalan", "huarong" };
12     ListView lv;
13     @Override
14     protected void onCreate(Bundle savedInstanceState) {
15         // TODO Auto-generated method stub
16         super.onCreate(savedInstanceState);
17         setContentView(R.layout.main3);
18         ArrayAdapter<String> a = new ArrayAdapter<String>(this,
19                 android.R.layout.simple_list_item_1, str);
20         lv = (ListView) findViewById(android.R.id.list);
21         lv.setAdapter(a);
22     }
23     @Override
24     protected void onListItemClick(ListView l, View v, int position, long id) {
25         // TODO Auto-generated method stub
26         super.onListItemClick(l, v, position, id);
27         String selected = l.getItemAtPosition(position).toString();
28         System.out.println("checkedItem:"+selected+",position:"+position);
29     }
30     
31     
32 }