title: Android full Screen flag gives an exception
body: <p>In my android app I set</p>
  
  <pre><code>this.getWindow().setFlags(WindowManager.LayoutParams.FLAG_FULLSCREEN, 
                                  WindowManager.LayoutParams.FLAG_FULLSCREEN );
  </code></pre>
  
  <p>Then my touch screen event doesnt’ work any more.</p>
  
  <p>Further Explaining,
  I have a button and onClick it changes the contentView by <code>setContentView(R.layout.choose_player);</code>. 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>
  
  <blockquote>
    <p>java.lang.IllegalArgumentException: parameter must be a descendant of this view</p>
  </blockquote>