What is firebase_messaging?

Start receiving notifications with firebase_messaging.

What is firebase_messaging?

The firebase_messaging package enables receiving push notifications via Firebase Cloud Messaging (FCM). You access the singleton with FirebaseMessaging.instance. Notifications can be received while the app is in foreground, background, or terminated.

final messaging = FirebaseMessaging.instance;

FirebaseMessaging.instance

You reach the notification service through FirebaseMessaging.instance. From this instance you perform token retrieval, notification listening, and topic subscription. It is accessed once on app startup and used throughout the lifecycle.

final messaging = FirebaseMessaging.instance;
messaging.getToken();

Exercise Access the singleton

Get the messaging instance and print 'ok'.

Show example solution

class FirebaseMessaging {
  static final FirebaseMessaging instance = FirebaseMessaging._();
  FirebaseMessaging._();
}

void main() {
  final messaging = FirebaseMessaging.instance;
  print('ok');
}

Test yourself

What does the firebase_messaging package provide?
- Device location tracking
- Receiving push notifications
- Database management
- User authentication
Show answer

Receiving push notifications — The firebase_messaging package provides receiving push notifications via FCM; it has nothing to do with database, authentication, or location.

Access the instance

final messaging = FirebaseMessaging.____;

Show answer

final messaging = FirebaseMessaging.instance;

firebase_messaging parts

FirebaseMessaging.instance

Singleton instance
firebase_messaging

Notification package
FCM

Firebase notification service
notification

Notification

Next lesson: getToken

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