INVALID_SENDER error at GCM registration

Question

I am developing application where I want to implement push notification for that I am using GCM, I have registered my project on google console and using project ID as sende

Answer 1

SENDER_ID = Project Number, I was using Project Id.. Project Number is available on console beside project id.

Answer 2

Here is a working example for push notifications, hope this helps:

private String SENDER_ID = "xxxxxxx";
private GoogleCloudMessaging gcm;

//somewhere else
gcm = GoogleCloudMessaging.getInstance(context);
String msg = gcm.register(SENDER_ID);

I recently got some service not available errors here so I also implemented a Broadcastreciever to recieve the regestration token.

@Override
public void onReceive(Context context, Intent intent) {
    Bundle data = intent.getExtras();
    if (data!=null){
        String regId = data.getString("registration_id");
    }
}

Answer 3

Google has changed its layout. you can find project_number from here

select project -> My Project

click three dots -> Project Information -> Project Number

Answer 4

I got same error and found out that google login was not enabled in firebase console. After enabling it error was gone.

Check this image for reference: