This example include using of GCM for Android and AppEngine, you can find how to use the new Volley library from IO 2013, Facebook SDK and G+ login.
you will need to get the following libraries before you can use this example: 1)https://www.facebook.com/campaign/landing.php?campaign_id=282184128580929&placement=Android_SDK&url=https://developers.facebook.com/resources/facebook-android-sdk-3.0.1.zip 2)git clone https://android.googlesource.com/platform/frameworks/volley 3)https://github.com/ianhanniballake/ActionBarSherlock#__sid=0
you can find the application in the google play: https://play.google.com/store/apps/details?id=com.iapplize.gcmtest
Licence:
Copyright (C) 2013 Leonid Olevsky
This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any later version.
This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
You should have received a copy of the GNU General Public License along with this program. If not, see http://www.gnu.org/licenses/