title: Facebook Single-Sign On: when user logs out of Facebook app, how do I log out of my app?
body: <p>I'm completely flabbergasted by the Facebook SDK for Android--it's quite challenging to use effectively. As I understand it, these are the rules for single sign on:</p>
  
  <ul>
  <li>If a user has the Facebook app and logs into a third-party app using the SDK, the Facebook app is logged in as well</li>
  <li>If the user logs out of the third-party app using the SDK, the Facebook app is still signed in (probably for the best)</li>
  <li>If the user logs out of the Facebook app, the third-party app using the SDK is unaffected</li>
  </ul>
  
  <p>Is there a way, in an Android app using the Facebook SDK, to check and see if the official Facebook app is NOT signed into the same account the Android app is using, and if that is the case, sign out of the Android app... in other words, if you go into the Facebook app and sign out, then go to the third-party app, it will be logged out?</p>