public void authenticate(final Activity context, final String[] permissions, final boolean sso) {
    facebookSessionStore.restore(facebook, context);

    FacebookDialogListener facebookDialogListener =
        new FacebookDialogListener(context, facebook, facebookSessionStore, listener) {

          @Override
          public void onFinish() {
            finish(context);
          }

          @Override
          public void handleError(Throwable error) {
            if (listener != null) {
              listener.onError(new SocializeException(error));
            } else {
              doError(context, error, permissions, sso);
            }
          }
        };

    if (sso) {
      facebook.authorize(context, permissions, facebookDialogListener);
    } else {
      facebook.authorize(context, permissions, Facebook.FORCE_DIALOG_AUTH, facebookDialogListener);
    }
  }
 public void logout(Activity context) {
   try {
     facebook.logout(context);
   } catch (Exception e) {
     if (listener != null) {
       listener.onError(new SocializeException(e));
     } else {
       if (logger != null) {
         logger.error(e.getMessage(), e);
       } else {
         e.printStackTrace();
       }
     }
   }
 }