android facebook sdk after add library

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http://stackoverflow.com – i click on my project and then android Tools and then add support library and then i have an issue (which work before i did "add support library") i think that i have an issue with the facebook sdk: this is part of my mainActivity: Settings.addLoggingBehavior(LoggingBehavior.INCLUDE_ACCESS_TOKENS); Session session = Session.getActiveSession(); if (session == null) { if (savedInstanceState != null) { session = Session.restoreSession(this, null, statusCallback, savedInstanceState); } if (session == null) { s (HowTos)