title: Detect Android orientation: landscape-Left v. landscape-Right
body: <p>How can I detect which one of 4 sides of the phone is up.</p>
  
  <p>I can detect portrait/landscape mode, but how do I tell <strong>landscape-turned-on-left-side</strong> from <strong>landscape-turned-on-right-side</strong>?</p>
  
  <p>Basically I want to make a nice transition animation when user turns phone. You know, like in iPhone's Safari: a swift 400ms rotation from the previous layout to the new.</p>