title: Android Facebook and Google+ offline login
body: <p>My android application requires the user to login using Facebook or Google+ to see the contents of the app.</p>
  
  <p>When the user is always connected to the internet everything works fine, i get the access token for the service he chose and life is good.</p>
  
  <p>The thing is, i want the user to be able to auto-login without internet connection, using the last user he went online with. I have the last access token stored in a file, but i don't know what to do with it to make my app have that behaviour.</p>