title: Dialog themed activity : positive and negative buttons
body: <p>I'm trying to theme an activity as an <code>AlertDialog</code>. The problem I'm facing is that I can't find a way to put two buttons on the bottom of my window that would look like the positive and negative buttons of an <code>AlertDialog</code></p>
  
  <p>I've already added that line to my Activity in the manifest  (I'm using Sherlock Library): </p>
  
  <pre><code>android:theme="@style/Theme.Sherlock.Dialog"
  </code></pre>
  
  <p>And the Activity is looking exactly like a Dialog, but I can't find a theme to set on the buttons. What could I do?</p>