Sends a test GCM message to verify Google Cloud Messaging (GCM) issetup and working properly. Requires Google Cloud Messaging API tobe enabled through the Developer Console. Works on a device oremulator to act as a GCM server. REQUIRES: API Key - received afterenabling Google Cloud Messaging through the Developer ConsoleDevice Token (unique per device) - received after call togetToken() The only purpose of this app is for developers to verifytheir GCM code is working correctly. The project source code isavailable at this link:https://gitlab.com/NightSkyDev/GCMTester.git *The screenshot belowshows the entire application. The result will be displayed in amessage at the bottom of the screen.