Android Tab导航-ActivityGroup

private Button button1; 
	private Button button2;
	private LinearLayout container;
	private OnClickListener l = new OnClickListener(){
		@Override
		public void onClick(View v) {
			// TODO Auto-generated method stub
			switch(v.getId()){
			case R.id.button1:
				switchActivity(0);
				break;
			case R.id.button2:
				switchActivity(1);
				break;
			}
		}
	};
	@Override
	protected void onCreate(Bundle savedInstanceState) {
		super.onCreate(savedInstanceState);
		setContentView(R.layout.main);
		button1 = (Button)findViewById(R.id.button1);
		button2 = (Button)findViewById(R.id.button2);
		container = (LinearLayout) findViewById(R.id.container);
		button1.setOnClickListener(l);
		button2.setOnClickListener(l);
		switchActivity(0);
	}
	private void switchActivity(int id){
		container.removeAllViews();
		Intent intent = null;
		switch(id){
		case 0:
			intent = new Intent(this,TestActivity1.class);
			break;
		case 1:
			intent = new Intent(this,TestActivity2.class);
			break;
		}
		intent.addFlags(Intent.FLAG_ACTIVITY_CLEAR_TOP);
		Window  subActivity = getLocalActivityManager().startActivity("subActivity", intent);
		container.addView(subActivity.getDecorView(),LayoutParams.FILL_PARENT, LayoutParams.FILL_PARENT);
	}

<?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">
	<LinearLayout android:orientation="horizontal"
		android:layout_width="fill_parent" android:layout_height="wrap_content">
		<Button android:id="@+id/button1" android:layout_width="wrap_content"
			android:layout_height="wrap_content" android:text="窗体1" />
		<Button android:id="@+id/button2" android:layout_width="wrap_content"
			android:layout_height="wrap_content" android:text="窗体2" />
	</LinearLayout>
	<LinearLayout android:id="@+id/container" android:orientation="horizontal"
		android:layout_width="fill_parent" android:layout_height="fill_parent"
		android:background="#0000ff">
	</LinearLayout>
</LinearLayout>