Android tabHost的使用方法

<?xml version="1.0" encoding="utf-8"?>  
<FrameLayout xmlns:android="http://schemas.android.com/apk/res/android" 
    android:orientation="vertical"  
    android:layout_width="fill_parent"  
    android:layout_height="fill_parent"  
    >  
    <TextView android:id="@+id/tab_demo_tv1"  
        android:layout_width="fill_parent"   
        android:layout_height="fill_parent"   
        android:text="tab_demo_tv1"  
    />  
    <TextView android:id="@+id/tab_demo_tv2"  
        android:layout_width="fill_parent"   
        android:layout_height="fill_parent"   
        android:text="tab_demo_tv2"  
    />  
    <TextView android:id="@+id/tab_demo_tv3"  
        android:layout_width="fill_parent"   
        android:layout_height="fill_parent"   
        android:text="tab_demo_tv3"  
    />  
</FrameLayout>

public class TabDemo extends TabActivity {  
    private TabHost tabHost;  
      
    public void onCreate(Bundle savedInstanceState) {  
        super.onCreate(savedInstanceState);  
        tabHost = getTabHost();  
          
        LayoutInflater.from(this).inflate(R.layout.tab_demo, tabHost.getTabContentView(), true);  
        tabHost.addTab(tabHost.newTabSpec("tab1").setIndicator("Tab1", null).setContent(R.id.tab_demo_tv1)); 
        tabHost.addTab(tabHost.newTabSpec("tab2").setIndicator("Tab2", null).setContent(R.id.tab_demo_tv2)); 
        tabHost.addTab(tabHost.newTabSpec("tab3").setIndicator("Tab3", null).setContent(R.id.tab_demo_tv3)); 
          
        setContentView(tabHost);  
    }  
}