如何防止在 Flutter 应用程序后台显示 FCM 通知？

Question

Future<void> _firebaseMessagingBackgroundHandler(RemoteMessage message) async {
  print('Handling a background message ${message.messageId}');
}

FirebaseMessaging.onBackgroundMessage(_firebaseMessagingBackgroundHandler);

我可以使用这些代码片段显示后台通知。但是有什么办法可以不让某些特定的通知在后台显示呢？

例如我不想显示通知data = {title = "call"}

Answer 1

from the sender device u have to send data only notification

await http.post(
          Uri.parse('https://fcm.googleapis.com/fcm/send'),
          headers: <String, String>{
            'Content-Type': 'application/json; charset=UTF-8',
            'Authorization': 'key=$serverKey',
          },
          body: jsonEncode(
            <String, dynamic>{
              'data': <String, dynamic>{
                'id': '2',
                'status': 'done'
              },
              'to': userToken,
              "collapse_key": uid,
            },
          ),
        );