title: Activity.addContentView(View) == ViewGroup.addContentView(View)?
body: <p>I have a question regarding Android Activitys:</p>
  
  <p>An Activity has the Method <code>addContentView(View)</code> while a ViewGroup has a (similar?) <code>addView(View)</code> Method. </p>
  
  <p>Unfortunately its undocumented where the View from <code>addContentView</code> is placed. Is it like a <code>LinearLayout</code> just adding the View to the bottom, or is it more like a <code>FrameLayout</code>, which adds its Views "onTop" ? Does it depend on the <code>ViewGroup</code> set by <code>setContentView</code>?</p>
  
  <p>If I dive into the sources I see that <code>addContentView</code> will call <code>Window</code>'s abstract Method <code>addContentView</code>. Unfortunately I cannot see which class is implementing this Method. So whats the behaviour of Activitys <code>addContentView</code> exactly? </p>