title: Display Activity as overlay window on tablets
body: <p>How do you present an Activity as an overlay window on tablets? An example of this is the new Google+ app as seen here:</p>
  
  <p><img src="https://i.stack.imgur.com/j8oMA.jpg" alt="enter image description here"></p>
  
  <p>Importantly I want the ActionBar to be part of the window and for the Activity beneath to be dimmed as seen in the screenshot.</p>
  
  <p>Thanks</p>