如何在颤动中将 TimeOfDay 添加到本地通知？

Question

我希望在最终用户使用时间选择器选择它的特定时间显示通知。我对如何做到这一点的过程感到困惑。请指导我解决这个问题。

从模型中获取变量：

late var selectedTime = TimeOfDay.now();

用户从前端选择时间：

Future<Null> selectTime (BuildContext context) async{
    picked =  (await showTimePicker(
      context: context,
      initialTime: model.selectedTime,

    ))!;

    if (picked != null){
      setState(() {
        model.selectedTime = picked;
        this.preferences?.setString("dateValue", model.selectedTime.format(context));
      });
    }

  }
Widget build(BuildContext context) {
    return Scaffold(
resizeToAvoidBottomInset: false,
      body: Container(
             child: GestureDetector(
                      onTap: (){
                                  selectTime(context);
                                },
                                child: Text(
                                  '${this.preferences?.getString("dateValue") ?? model.defaultTime.format(context)}',
                                ),
                              ),

这个类单独包含通知。

final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
FlutterLocalNotificationsPlugin();
final mymodel = myModel();
Future<void> firstNotifications() async{
  var initializationSettingsAndroid =
  AndroidInitializationSettings('@mipmap/ic_launcher');
  var initializationSettings = InitializationSettings(
      android: initializationSettingsAndroid);
  flutterLocalNotificationsPlugin.initialize(initializationSettings);

  const AndroidNotificationDetails firstNotificationSpecifics =
  AndroidNotificationDetails(
    'channel id',
    'channel name',
    'channel description',
    sound: RawResourceAndroidNotificationSound('song1'),
    playSound: true,
    enableVibration: false ,
    visibility: NotificationVisibility.secret,
    autoCancel: true,
    timeoutAfter:7000
  );

  const NotificationDetails firstNotificationPlatformSpecifics =
  NotificationDetails(android: firstNotificationSpecifics);
  await flutterLocalNotificationsPlugin.zonedSchedule
    (1, null, null, tz.TZDateTime.now(tz.local).add(Duration(seconds: 5)), firstNotificationPlatformSpecifics,
      uiLocalNotificationDateInterpretation: UILocalNotificationDateInterpretation.absoluteTime,
      androidAllowWhileIdle: true);
}

但是现在这个代码在我手动给出的 5 秒后播放通知。但我希望在用户选择的时间显示通知。

Answer 1

选择时间后需要调用 setNotification 函数

Future<Null> selectTime (BuildContext context) async{
    picked =  (await showTimePicker(
      context: context,
      initialTime: model.selectedTime,

    ))!;

    if (picked != null){
      setState(() {
        model.selectedTime = picked;
setNotification(picked);//Call it here
        this.preferences?.setString("dateValue", model.selectedTime.format(context));
      });
    }

  }
  void setNotification( TimeOfDay selectedTime) {
    final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
        FlutterLocalNotificationsPlugin();
    // final mymodel = myModel();
    Future<void> firstNotifications() async {
      var initializationSettingsAndroid =
          AndroidInitializationSettings('@mipmap/ic_launcher');
      var initializationSettings =
          InitializationSettings(android: initializationSettingsAndroid);
      flutterLocalNotificationsPlugin.initialize(initializationSettings);

      const AndroidNotificationDetails firstNotificationSpecifics =
          AndroidNotificationDetails(
              'channel id', 'channel name', 'channel description',
              sound: RawResourceAndroidNotificationSound('song1'),
              playSound: true,
              enableVibration: false,
              visibility: NotificationVisibility.secret,
              autoCancel: true,
              timeoutAfter: 7000);

      const NotificationDetails firstNotificationPlatformSpecifics =
          NotificationDetails(android: firstNotificationSpecifics);

          tz.TZDateTime zonedTime = tz.TZDateTime.local(DateTime.now().year,DateTime.now().month,DateTime.now().day,selectedTime.hour,
                          selectedTime.minute).subtract(DateTime.now().timeZoneOffset);

      await flutterLocalNotificationsPlugin.zonedSchedule(
          1,
          null,
          null,
          tz.TZDateTime.now(tz.local) ,
          firstNotificationPlatformSpecifics,
          uiLocalNotificationDateInterpretation:
              UILocalNotificationDateInterpretation.absoluteTime,
          androidAllowWhileIdle: true);
    }
  }