google-services.json file الحل الرسمي https://developers.google.com/cloud-messaging/android/client GCM API Implementing GCM Client on Android Google Developer Console official guide Setup a GCM Client app for Android Google Cloud Messaging Google公式のGCMのサンプル https://developers.google.com/cloud-messaging/android/client Implementing GCM Client on Android https://developers.google.com/cloud-messaging/android/client cloud-messaging/android/client#manifest GCM https://developers.google.com/cloud-...android/client https://developers.google.com/cloud-messaging/android/client الحل الرسمي Implementing GCM Client on Android https://developers.google.com/cloud-messaging/android/client https://developers.google.com/cloud-...android/client тут GCM https://developers.google.com/cloud-...android/client Setup a GCM Client app for Android https://developers.google.com/cloud-messaging/android/client doc https://developers.google.com/cloud-messaging/android/client developers.google.com Set up a GCM Client App on Android https://developers.google.com/cloud-messaging/android/client Google Developers website Setup a GCM Client app for Android developers.google.com/cloud-messaging/android/client google-services.json file https://developers.google.com/cloud-messaging/android/client