小编Yer*_*eri的帖子

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', …