Facebook Android SDK 3.0 - how to log out and close a session

In the previous two Blog posts (here and here), I showed how to connect a user to their Facebook account (i.e. open a Facebook session) and how to make a Facebook API request (requesting additional Facebook permissions en route if necessary). In this final Blog post, I'll show to close the Facebook session, as follows:

public void disconnectFacebookAccount()
{
  showProgressDialog("Disconnecting Facebook account...");

  new AsyncTask<Void, Void, Boolean>()
  {
    @Override
    protected Boolean doInBackground(Void... params)
    {
      if (Session.getActiveSession() != null)
        Session.getActiveSession().closeAndClearTokenInformation();

      clearFacebookInfoFromSharedPreferences();

      // perform any other operations you need to do perform here
      // such as clearing local database tables and so forth

      return true;
    }

    @Override
    protected void onPostExecute(Boolean result)
    {
      // safety check
      if (isFinishing())
        return;

      if (result == null
          || result == false)
        onFailedFacebookDisconnect();
      else
        onSucceededFacebookDisconnect();
    }
  }.execute();
}

That's it! That's the end of my Facebook Android 3.0 series. You should have enough know-how now for all kinds of Facebook API requests! :)