There is 2 tab defined in MyTab :

 1. setContent(new Intent(this, SubTab.class))
 2. setContent(R.id.view1)

public boolean onKeyDown(int keyCode, KeyEvent event)  {
    if (keyCode == KeyEvent.KEYCODE_BACK && event.getRepeatCount() == 0) {
        Log.i("MyTab Back", "In MyTab ");
        return true;
        }
    return super.onKeyDown(keyCode, event);
 }

public boolean onKeyDown(int keyCode, KeyEvent event) {
    if (keyCode == KeyEvent.KEYCODE_BACK) {
    Log.i("MyTab Back", "In MyTab ");
    return true;
    }
return false;