Android GCM Java Server - Push Notification without message data

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http://stackoverflow.com – I 'am try to develop java server to send push notification in my app. I succeed to send a notification but i have two problems ... 1/ The message text not appear in status bar (only the name of the application is displayed) 2/ When i click on the notification in the status bar nothing appens (not opening the application) This is my code of the java server : //ArrayList<String> userGcmList = new ArrayList<String>(); ArrayList<String> userRegIdGcmList = new ArrayList<String>(); //my phone userRegIdGcmList.add("***********"); int numv (HowTos)