I can not get registration ID from Android GCM

Question

Although I try other answer about this problem, it can\'t be solved. Sender ID is correct, permissions are added, API key is true.

I use this post for creating the p

Answer 1

Do you have GCMIntentService defined correctly at the root package of your app?

Make sure that "my_app_package" is identical to the main package of your app, or your id will return an empty string.

Also notice that

    GCMRegistrar.register(this, "...");

is asynchronous. Therefore, calling GCMRegistrar.getRegistrationId(this) immediately after that is not reliable, so you should avoid it.

The id will arrive via broadcast callback to your GCMIntentService, as a part of the registration procedure. from there you can then store the gcm/fcm key anywhere you like, and use it in other parts of the application (usually on the server).