我被困住了。我的后台通知显示两次。但前台只有一个通知。这是我的代码
Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
// If you're going to use other Firebase services in the background, such as Firestore,
// make sure you call `initializeApp` before using other Firebase services.
await Firebase.initializeApp();
if(
!AwesomeStringUtils.isNullOrEmpty(message.notification?.title, considerWhiteSpaceAsEmpty: true) ||
!AwesomeStringUtils.isNullOrEmpty(message.notification?.body, considerWhiteSpaceAsEmpty: true)
){
// print('message also contained a notification: ${message.notification.body}');
String imageUrl;
imageUrl ??= message.notification.android?.imageUrl;
imageUrl ??= message.notification.apple?.imageUrl;
print(imageUrl);
if(imageUrl == null){
var id = Random().nextInt(2147483647);
await AwesomeNotifications().createNotification(
content: NotificationContent(
id: id,
title: message.notification.title,
body: message.notification.body,
color: Colors.orange,
customSound: 'resource://raw/alert',
notificationLayout: NotificationLayout.BigText,
channelKey: 'basic_channel_background',
payload: {'data':message.data['payload']}
),
actionButtons: [
NotificationActionButton(
label: 'Lihat Selengkapnya',
enabled: true,
buttonType: ActionButtonType.Default,
key: 'background',
)
]
);
}else{
await AwesomeNotifications().createNotification(
content: NotificationContent(
id: Random().nextInt(2147483647),
title: message.notification.title,
body: message.notification.body,
bigPicture: imageUrl,
color: Colors.orange,
customSound: 'resource://raw/alert',
notificationLayout: NotificationLayout.BigPicture,
channelKey: 'basic_channel_background',
payload: {'data':message.data['payload']}
),
actionButtons: [
NotificationActionButton(
label: 'Lihat Selengkapnya',
enabled: true,
buttonType: ActionButtonType.Default,
key: 'background',
)
]
);
}
}
}
// End Background Message
这是我的前台代码
// Foreground Apps
Future<void> main() async{
WidgetsFlutterBinding.ensureInitialized();
await Firebase.initializeApp();
FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);
if (!kIsWeb) {
await FirebaseMessaging.instance
.setForegroundNotificationPresentationOptions(
alert: true,
badge: true,
sound: true,
);
await AwesomeNotifications().initialize(
'resource://mipmap/launcher_icon',
[
NotificationChannel(
channelGroupKey: 'basic_tests',
channelKey: 'basic_channel',
channelName: 'My Cahaya Notification',
channelDescription: 'Notification channel for basic tests',
icon: 'resource://mipmap/launcher_icon',
importance: NotificationImportance.High,
playSound: true,
soundSource: 'resource://raw/alert'
),
NotificationChannel(
channelGroupKey: 'basic_background',
channelKey: 'basic_channel_background',
channelName: 'My Cahaya Notification Background',
channelDescription: 'Notification channel for basic tests',
icon: 'resource://mipmap/launcher_icon',
importance: NotificationImportance.High,
playSound: true,
soundSource: 'resource://raw/alert'
),
], debug: true);
AwesomeNotifications().actionStream.listen((event) async{
print('event received!');
var data = event.toMap();
if(data['buttonKeyPressed'] == "background"){
SharedPreferences prefs = await SharedPreferences.getInstance();
prefs.setString("Navigate", data['payload']['data']);
}else{
_navigateToItemForeground(data['payload']['data']);
}
// do something based on event...
// AwesomeNotifications().actionSink.close();
});
}
FirebaseMessaging.onMessage.listen((RemoteMessage message) async{
RemoteNotification notification = message.notification;
AndroidNotification android = message.notification?.android;
if (notification != null && android != null && !kIsWeb) {
if(!AwesomeStringUtils.isNullOrEmpty(message.notification?.title, considerWhiteSpaceAsEmpty: true) ||
!AwesomeStringUtils.isNullOrEmpty(message.notification?.body, considerWhiteSpaceAsEmpty: true)){
print("something");
String imageUrl;
imageUrl ??= notification.android?.imageUrl;
imageUrl ??= notification.apple?.imageUrl;
if(imageUrl == null){
await AwesomeNotifications().createNotification(
content: NotificationContent(
id: Random().nextInt(2147483647),
title: notification.title,
body: notification.body,
color: Colors.orange,
customSound: 'resource://raw/alert',
notificationLayout: NotificationLayout.BigText,
channelKey: 'basic_channel',
payload: {'data':message.data['payload']}
),
actionButtons: [
NotificationActionButton(
label: 'Lihat Selengkapnya',
enabled: true,
buttonType: ActionButtonType.Default,
key: 'test',
)
]
);
}else{
await AwesomeNotifications().createNotification(
content: NotificationContent(
id: Random().nextInt(2147483647),
title: notification.title,
body: notification.body,
bigPicture: imageUrl,
color: Colors.orange,
customSound: 'resource://raw/alert',
notificationLayout: NotificationLayout.BigPicture,
channelKey: 'basic_channel',
payload: {'data':message.data['payload']}
),
actionButtons: [
NotificationActionButton(
label: 'Lihat Selengkapnya',
enabled: true,
buttonType: ActionButtonType.Default,
key: 'test',
)
]
);
}
}
}
});
runApp(MyApp());
}
// End Foreground Apps
这是我的屏幕截图 截图
我尝试更改很棒的通知，但结果是相同的。你能帮我解决这个问题吗？我希望你能帮助我。非常感谢你
如果您的通知是在应用程序处于后台时发送的，Firebase 自动发送推送通知，因此您无需在应用程序中手动调用显示通知。
我是这样解决问题的：
Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
if (message.notification != null) {
//No need for showing Notification manually.
//For BackgroundMessages: Firebase automatically sends a Notification.
//If you call the flutterLocalNotificationsPlugin.show()-Methode for
//example the Notification will be displayed twice.
}
return;
}
FCM 有效负载
{
"to":"_some_fcm_token_",
//remove this
"notification": {
"title": "this is title",
"body": "this is subtitle"
},
"type": "post_like",
"data": {
"model":{"id":"dsaflkdskfklgdkgjdksakdk"},
"body": "this is subtitle",
"title": "this is title",
"click_action": "FLUTTER_NOTIFICATION_CLICK"
},
"priority": "normal"
}
第一个是手动创建的（本地），另一个是 Firebase 自动创建的。
向您的设备发送消息时，请确保该消息是
notificationdata有效负载：Platform.isAndroid？ json.encode(message.data):json.encode(message.notification)
像这样设置有效负载数据
这是因为您初始化了
await Firebase.initializeApp()