重写tabhost

public class Demo_ScrollableTabHost4  extends ScrollableTabActivity{

@Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
       
        /*
         * set this activity as the tab bar delegate
         * so that onTabChanged is called when users tap on the bar
         */
        setDelegate(new SliderBarActivityDelegateImpl());
       
        for (int i=0; i<3; i++)
        {
        Intent intent;
        if (i%2==0) intent = new Intent(this, DemoActivity1.class);
        else intent = new Intent(this, DemoActivity2.class);
       
        /*
        * This adds a title and an image to the tab bar button
        * Image should be a PNG file with transparent background.
        * Shades are opaque areas in on and off state are specific as parameters
        */
        this.addTab("title"+i, R.drawable.star, RadioStateDrawable.SHADE_GRAY, RadioStateDrawable.SHADE_GREEN,intent);
        }
       
        /*
         * commit is required to redraw the bar after add tabs are added
         * if you know of a better way, drop me your suggestion please.
         */
        commit();
    }

    private class SliderBarActivityDelegateImpl extends SliderBarActivityDelegate
    {
    /*
    * Optional callback method
    * called when users tap on the tab bar button
    */
    protected void onTabChanged(int tabIndex)
    {
    Log.d("onTabChanged",""+tabIndex);
    }
    }
}