title: Find root layout in activity
body: <p>Is there a dynamic way to get at the root layout (the one that is the parent to all the other Layouts) in the XML currently set to my Activity?</p>
  
  <p>What I'm after is rather than giving my root layout an explicit id and finding it via findViewById, I'm hoping to get something along the lines of </p>
  
  <p>pseudo code:</p>
  
  <pre><code>this.findTopLayout();
  </code></pre>
  
  <p>having already called <code>setContentView(R.layout.foo);</code></p>
  
  <p>I'm not seeing anything in the spec that would do the trick, am I just missing it, or is there no way to do this?</p>