android中的tabdemo

<TabHost android:layout_height="match_parent"
    android:layout_width="match_parent"
    android:id="@android:id/tabhost"
     xmlns:android="http://schemas.android.com/apk/res/android">
    <LinearLayout
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:orientation="vertical">
    	<TabWidget 
    	    android:layout_width="match_parent"
    	    android:layout_height="wrap_content"
    	    android:id="@android:id/tabs"
    	    >
    	</TabWidget>
    	<FrameLayout android:id="@android:id/tabcontent"
    	    android:layout_width="match_parent"
    	    android:layout_height="wrap_content"
    	    android:layout_weight="1"
    	    >
    	</FrameLayout>
	</LinearLayout>
</TabHost>

public class TabActivity extends android.app.TabActivity {
	private TabHost _tabHost;
	
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		// TODO Auto-generated method stub
		super.onCreate(savedInstanceState);
		setContentView(R.layout.activity_tab);	
		_tabHost=getTabHost();
	}

	private void AddTab1() {
		// TODO Auto-generated method stub
		Intent intent1=new Intent(this,Activity1.class);
		TabSpec sp1=_tabHost.newTabSpec("选1");
		//跳转地
		sp1.setContent(intent1);
		//标题
		sp1.setIndicator("一");
		_tabHost.addTab(sp1);
	}
}