Flutter后台FCM通知重复：如何禁用系统默认通知

我在使用FlutterLocalNotificationsPlugin处理Firebase Messaging后台消息时，收到了两条通知——一条来自FlutterLocalNotificationsPlugin，另一条是系统默认通知。因为需要自定义通知样式，必须使用FlutterLocalNotificationsPlugin，请问如何禁用系统默认通知？

Flutter主函数代码 #

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await Firebase.initializeApp();
  await init();
  FirebaseMessaging.onBackgroundMessage(firebaseMessagingBackgroundHandler);
  await setupFlutterNotifications();
  runApp(const MyApp());
}

@pragma('vm:entry-point')
Future<void> firebaseMessagingBackgroundHandler(RemoteMessage message) async {
  await Firebase.initializeApp();
  await setupFlutterNotifications();
  print('Application background message: $message');
  final title = message.notification!.title;
  final body = message.notification!.body;
  await notificationService.notification(message);
}

通知服务代码 #

Future<void> notification(RemoteMessage message) async {
    RemoteNotification? notification = message.notification!;
    flutterLocalNotificationsPlugin.show(
      notification.hashCode,
      notification.title,
      notification.body,
      const NotificationDetails(
        android: AndroidNotificationDetails(
          'channel id',
          'your channel name',
          channelDescription: 'your channel description',
          icon: 'launch_background',
        ),
      ),
    );
  }

解决方案 #

我使用laravel-notification-channels/fcm发送FCM通知，已找到解决方案：注释掉FCM的setNotification方法，示例代码如下：

public function toFcm($notifiable)
    {
        return FcmMessage::create()
            ->setData([
                'title' => json_encode($this->newMessage['title']),
                'body' => json_encode($this->newMessage['body']),
            ])
            // ->setNotification(\NotificationChannels\Fcm\Resources\Notification::create()
            //     ->setTitle($this->newMessage['title'])
            //     ->setBody($this->newMessage['body'])
            //     // ->setImage($this->newMessage['user']['image'])
            // )
            ->setAndroid(
                AndroidConfig::create()
                    ->setFcmOptions(AndroidFcmOptions::create()->setAnalyticsLabel('analytics'))
                    ->setPriority(AndroidMessagePriority::HIGH())
                    // ->setNotification(AndroidNotification::create()->setChannelId('high_importance_channel'))
            )->setApns(
                ApnsConfig::create()
                    ->setFcmOptions(ApnsFcmOptions::create()->setAnalyticsLabel('analytics_ios'))
            );
    }

内容的提问来源于stack exchange，提问作者noahark