Flutter StreamChat SDK : Notifications not showing when the app is closed? - flutter

Question

I'm working on a flutter delivery app and I want to integrate chat functionality and I found out that the StreamChat SDK is the best solution for that !
I already integrated the SDK and it's working , so to receive a notification when there is a new message I set up push notifications according to the docs in my flutter applications, when I test it up using stream CLI ,
I receive the notification and it also works when the app on the background but I don't receive anything when the app is closed and also nothing shows on the dashboard logs !
=====My code ========
await client.connectUser(
User(
id: sharedPreferences.getString('username'),
),
token,
);
var fcm = await FirebaseMessaging.instance.getToken();
await client.addDevice(fcm, PushProvider.firebase);
final channel = client.channel(
'messaging',
id: deliveryData['deliveryNumber'],
extraData: {
"name": deliveryData['title'],
},
);
final currentUserId = client.state.user.id;
client
.on(
EventType.messageNew,
EventType.notificationMessageNew,
)
.listen((event) async {
if (event.message?.user?.id == currentUserId) {
return;
}
final flutterLocalNotificationsPlugin =
FlutterLocalNotificationsPlugin();
final initializationSettingsAndroid =
AndroidInitializationSettings('launch_background');
final initializationSettings = InitializationSettings(
android: initializationSettingsAndroid,
);
await flutterLocalNotificationsPlugin
.initialize(initializationSettings);
await flutterLocalNotificationsPlugin.show(
event.message.id.hashCode,
'New message from : ' + event.message.user.name,
event.message.text,
NotificationDetails(
android: AndroidNotificationDetails(
'message channel',
'Message channel',
'Channel used for showing messages',
icon: '#drawable/notification',
priority: Priority.high,
importance: Importance.high,
),
),
);
});

Answer 1

I found the solution for that , the problem was that I used channel.watch(); instead, I should also add the user to the channel
channel.addMembers(["thierry", "josh"]); in order to receive push notifications as it is mentioned in the docs
Watchers vs Members
The concepts of watchers vs members can require a bit of clarification:
members: a permanent association between a user and a channel. If the
user is online and not watching the channel they will receive a
notification event, if they are offline they will receive a push
notification.
watchers: the list of watchers is temporary. It's anyone who is
currently watching the channel.
Being able to send messages, and otherwise engage with a channel as a non-member requires certain permissions. For example, we have pre-configured permissions on our livestream channel type to allow non-members to interact, but in the messaging channel type, only members of the channel can interact.