title: Drop Down Panning Android Fragment Transition
body: <p>I'm using Android Fragments. I want to achieve the effect below.</p>
  
  <p>I have 2 fragments details and a main-body. On a button click I want the details panel slide down and pan out part of the main-body.</p>
  
  <p>The details panel isn't declared in the activity's xml layout. It is being added dynamically. Also the details panel can be dismissed when the user is done with it.</p>
  
  <p>I found an example of exactly what I want to do. The Gmail app in honeycomb does this when you have it in portrait mode on the Xoom. Navigate all the way to an email such that it is take up the whole screen. Press the back button and notice the email body pans to the right to make room for the email messages list.</p>
  
  <p><img src="https://i.stack.imgur.com/f1C8G.png" alt="Before and after of the activity."></p>