title: setContentView gives an exception
body: <p>In my android app I set</p>
  
  <p>this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
                                  WindowManager.LayoutParams.FLAG_FULLSCREEN );
  Then my touch screen event doesnt’ work any more.</p>
  
  <p>Further Explaining,</p>
  
  <p>I have a button and onClick it changes the contentView by setContentView(R.layout.choose_player);.
  It works fine. But if you take the focus to the button by the trackball(making it yellow) and tap on it, it gives the exception.</p>
  
  <p>java.lang.IllegalArgumentException: parameter must be a descendant of this view</p>
  
  <pre><code>public void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    requestWindowFeature(Window.FEATURE_NO_TITLE);     
    this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN,
                             WindowManager.LayoutParams.FLAG_FULLSCREEN);         
    setContentView(R.layout.main1);    
  } 
  
  public void onClick(View v) {    
    setContentView(R.layout.main2); 
  }
  </code></pre>