Registration token
suggest changeOn initial startup of your app, the FCM SDK generates a registration token for the client app instance.
If you want to target single devices or create device groups, you’ll need to access this token by extending FirebaseInstanceIdService
.
The onTokenRefresh
callback fires whenever a new token is generated and you can use the method FirebaseInstanceID.getToken()
to retrieve the current token.
Example:
public class MyFirebaseInstanceIDService extends FirebaseInstanceIdService { /** * Called if InstanceID token is updated. This may occur if the security of * the previous token had been compromised. Note that this is called when the InstanceID token * is initially generated so this is where you would retrieve the token. */
@Override public void onTokenRefresh() { // Get updated InstanceID token. String refreshedToken = FirebaseInstanceId.getInstance().getToken(); Log.d(TAG, "Refreshed token: " + refreshedToken); } }
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