public void logout(final Context context,
                       final RequestListener listener,
                       final Object state) {
        new Thread() {
            @Override public void run() {
                try {
                    String response = fb.logout(context);
                    if (response.length() == 0 || response.equals("false")){
                        listener.onFacebookError(new FacebookError(
                                "auth.expireSession failed"), state);
                        return;
                    }
                    listener.onComplete(response, state); //SAD PANDA
                } catch (FileNotFoundException e) {
                    listener.onFileNotFoundException(e, state);
                } catch (MalformedURLException e) {
                    listener.onMalformedURLException(e, state);
                } catch (IOException e) {
                    listener.onIOException(e, state);
                }
            }
        }.start();
    }