Flutter本地通知每日计划通知

Question

一周以来，我一直在尝试让Flutter本地通知正常工作，但无法正常工作。基本上，问题是每当我创建每日通知时，它只在第一次工作，然后不会在第二天显示通知。假设我将每日计划通知设置为下午12:20，它将第一次在下午12:20显示通知，然后第二天就不会显示。当我看到挂起通知的列表时，我可以看到通知仍然存在。

这是我所有的通知代码

class NotificationService {
// Singleton pattern
static final NotificationService _notificationService =
NotificationService._internal();
factory NotificationService() {
return _notificationService;
}
NotificationService._internal();
static const channelId = "1";
final FlutterLocalNotificationsPlugin flutterLocalNotificationsPlugin =
FlutterLocalNotificationsPlugin();
static const AndroidNotificationDetails _androidNotificationDetails =
AndroidNotificationDetails(
channelId,
"thecodexhub",
channelDescription:
"This channel is responsible for all the local notifications",
playSound: true,
priority: Priority.high,
importance: Importance.high,
);
static const IOSNotificationDetails _iOSNotificationDetails =
IOSNotificationDetails();
final NotificationDetails notificationDetails = const NotificationDetails(
android: _androidNotificationDetails,
iOS: _iOSNotificationDetails,
);
Future<void> init() async {
const AndroidInitializationSettings androidInitializationSettings =
AndroidInitializationSettings('@mipmap/ic_launcher');
const IOSInitializationSettings iOSInitializationSettings =
IOSInitializationSettings(
defaultPresentAlert: false,
defaultPresentBadge: false,
defaultPresentSound: false,
);
const InitializationSettings initializationSettings =
InitializationSettings(
android: androidInitializationSettings,
iOS: iOSInitializationSettings,
);
// *** Initialize timezone here ***
tz.initializeTimeZones();
await flutterLocalNotificationsPlugin.initialize(
initializationSettings,
onSelectNotification: onSelectNotification,
);
}
Future<void> requestIOSPermissions() async {
await flutterLocalNotificationsPlugin
.resolvePlatformSpecificImplementation<
IOSFlutterLocalNotificationsPlugin>()
?.requestPermissions(
alert: true,
badge: true,
sound: true,
);
}
Future<void> showNotification(
int id, String title, String body, String payload) async {
await flutterLocalNotificationsPlugin.show(
id,
title,
body,
notificationDetails,
payload: payload,
);
}
Future<void> scheduleNotification(int id, String title, String body,
DateTime eventDate, TimeOfDay eventTime, String payload,
[DateTimeComponents? dateTimeComponents]) async {
final scheduledTime = eventDate.add(Duration(
hours: eventTime.hour,
minutes: eventTime.minute,
));
await flutterLocalNotificationsPlugin.zonedSchedule(
id,
title,
body,
tz.TZDateTime.from(scheduledTime, tz.local),
notificationDetails,
uiLocalNotificationDateInterpretation:
UILocalNotificationDateInterpretation.absoluteTime,
androidAllowWhileIdle: true,
payload: payload,
matchDateTimeComponents: dateTimeComponents,
);
}
Future<void> cancelNotification(int id) async {
await flutterLocalNotificationsPlugin.cancel(id);
}
Future<void> cancelAllNotifications() async {
await flutterLocalNotificationsPlugin.cancelAll();
}
Future getNotifications() async {
final List<PendingNotificationRequest> pendingNotificationRequests =
await FlutterLocalNotificationsPlugin().pendingNotificationRequests();
return pendingNotificationRequests;
}
}
Future<void> onSelectNotification(String? payload) async {
// await navigatorKey.currentState
//     ?.push(MaterialPageRoute(builder: (_) => DetailsPage(payload: payload)));
}

我是这样称呼它的。

await notificationService.scheduleNotification(
1,
_textEditingController.text,
"Reminder for your scheduled event at ${eventTime!.format(context)}",
eventDate!,
eventTime!,
jsonEncode({
"title": _textEditingController.text,
"eventDate": DateFormat("EEEE, d MMM y").format(eventDate!),
"eventTime": eventTime!.format(context),
}),
getDateTimeComponents(),
);
}

如果重要的话，这里是getDateTimeComponents

DateTimeComponents? getDateTimeComponents() {
if (segmentedControlGroupValue == 1) {
return DateTimeComponents.time;
} else if (segmentedControlGroupValue == 2) {
return DateTimeComponents.dayOfWeekAndTime;
}
}

我已经一周没有试图解决这个问题了。感谢您的阅读。

Answer 1

这里显示

使用zonedSchedule，方法是在未来通过并将DateTimeComponents.matchTime作为matchDateTimeComponents参数。

你似乎正确使用了DateTimeComponents.time，但我猜你的约会日期不是将来。你能试着给你的约会加上一千年吗？也许是因为在第一次发射之后，日期已经过去了，第二天不会因此而发射。