CODEWITHSUNDEEP
flutterdart
Zahid Tekbaş
Zahid Tekbaş

Reputation: 931

Must be a date in the future: Instance of 'TZDateTime'

I want to make a Notification Helper which schedules notifications. Everything works perfect but scheduling notifications does not work. I print the scheduled date, it is after DateTime.now() but still receiving that error:

E/flutter ( 9512): [ERROR:flutter/lib/ui/ui_dart_state.cc(186)] Unhandled Exception: Invalid argument (scheduledDate): Must be a date in the future: Instance of 'TZDateTime'

This is my function:


 static Future<void> setNotification(
      DateTime dateTime, int id, String title, String body) async {
    var now = DateTime.now();
    Duration duration = dateTime.difference(now);
    print(dateTime.toString());
    print(dateTime.toUtc());
    print(" tz : ${tz.TZDateTime.now(tz.local).add(duration)}");
    print("tz local: ${tz.local}");
    await _flutterLocalNotificationsPlugin.zonedSchedule(
      id,
      '$title',
      '$body',
      tz.TZDateTime.now(tz.local).add(duration),
      _notificationDetails,
      androidAllowWhileIdle: true,
      uiLocalNotificationDateInterpretation:
          UILocalNotificationDateInterpretation.absoluteTime,
    );
  }

How can I convert DateTime to TZDateTime properly?

Upvotes: 0

Views: 1821

Answers (1)

Extreme Geek
Extreme Geek

Reputation: 713

The FlutterLocalNotifications package uses TimeZone sensitive DateTime, the FlutterLocalNotifications docs suggest us to use TimeZone package so to use it in your code first you must import it and initialize it

import 'package:timezone/timezone.dart' as tz;
tz.initializeTimeZones();

then you must get the location using zone = tz.getLocation('Africa/Algiers'); note that Africa/Algiers is a timezone example

then you can simply get TZDateTime from DateTime like this

  tz.TZDateTime.from(DateTime.now(), zone),

zone is the location we got earlier

this will work like charm,

Upvotes: 2

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