flutter - 来自flutter_local_notifications中本地存储的自定义音调

Question

我可以使用自定义音调，flutter_local_notifications但我希望我的用户能够从他/她的移动设备中选择通知音，因为 WhatsApp 允许您从本地存储中选择任何通知声音。

有什么办法吗？如果您想查看代码，请告诉我，我会更新更多。

showNotification() async {
    var android = AndroidNotificationDetails('id', 'channel ', 'description',
        priority: Priority.high,
        importance: Importance.max,
        playSound: true,
        sound: RawResourceAndroidNotificationSound('xperia'));
    var iOS = IOSNotificationDetails(
      sound: "xperia.mp3",
    );
    var platform = new NotificationDetails(
      android: android,
      iOS: iOS,
    );
    await _flutterLocalNotificationsPlugin.show(
      0,
      widget.serviceName,
      'Service has been subscribed successfully!',
      platform,
      payload: 'xperia',
    );
  }