Flutter schedule local notification does not work - flutter

Question

I am trying to create a notification at a certain time but it is not working. The code does not throw any error but no notification is displayed on the device.
I am using flutter_local_notifications
Code that generates the notification:
Future<void> showNotification(
int hour, int id, String title, String body) async {
await flutterLocalNotificationsPlugin.zonedSchedule(
id,
title,
body,
_convertTime(hour),
const NotificationDetails(
android: AndroidNotificationDetails('main_channel', 'Main Channel',
channelDescription: "ashwin",
importance: Importance.max,
priority: Priority.max),
iOS: IOSNotificationDetails(
sound: 'default.wav',
presentAlert: true,
presentBadge: true,
presentSound: true,
),
),
uiLocalNotificationDateInterpretation:
UILocalNotificationDateInterpretation.absoluteTime,
androidAllowWhileIdle: true,
);
}
_converTime function code:
TZDateTime _convertTime(int hour) {
final tz.TZDateTime now = tz.TZDateTime.now(tz.local);
tz.TZDateTime scheduleDate =
tz.TZDateTime(tz.local, now.year, now.month, now.day, hour, 47);
return scheduleDate;
}
The result of the function is correct and is as follows: 2022-07-14 12:47:00.000Z
However, if instead of using this function, I change it to
Future<void> showNotification(
int hour, int id, String title, String body) async {
await flutterLocalNotificationsPlugin.zonedSchedule(
id,
title,
body,
// _convertTime(hour), // this does not work
tz.TZDateTime.now(tz.local).add(Duration(seconds: 1)), // this work
const NotificationDetails(
android: AndroidNotificationDetails('main_channel', 'Main Channel',
channelDescription: "ashwin",
importance: Importance.max,
priority: Priority.max),
// iOS details
iOS: IOSNotificationDetails(
sound: 'default.wav',
presentAlert: true,
presentBadge: true,
presentSound: true,
),
),
uiLocalNotificationDateInterpretation:
UILocalNotificationDateInterpretation.absoluteTime,
androidAllowWhileIdle: true,
);
}
I don't understand what could be happening.
I appreciate any help in advance.

Answer 1

try this one, remove some properties if you don't want them...
Future zonedScheduleNotification(String note, DateTime date, occ) async {
// tz.TZDateTime.parse(location, formattedString)
int id = math.Random().nextInt(10000);
log(date.toString());
log(tz.TZDateTime.parse(tz.getLocation("Asia/Kolkata"), date.toString())
.toString());
try {
await flutterLocalNotificationsPlugin.zonedSchedule(
id,
occ,
note,
tz.TZDateTime.parse(tz.getLocation("Asia/Kolkata"), date.toString()),
NotificationDetails(
android: AndroidNotificationDetails(
'your channel id', 'your channel name',
channelDescription: 'your channel description',
largeIcon: DrawableResourceAndroidBitmap("logo"),
icon: "ic_launcher",
playSound: true,
sound: RawResourceAndroidNotificationSound('bell_sound')),
),
androidAllowWhileIdle: true,
uiLocalNotificationDateInterpretation:
UILocalNotificationDateInterpretation.absoluteTime,
);
return id;
} catch (e) {
log("Error at zonedScheduleNotification----------------------------$e");
if (e ==
"Invalid argument (scheduledDate): Must be a date in the future: Instance of 'TZDateTime'") {
Fluttertoast.showToast(msg: "Select future date");
}
return -1;
}
}

Answer 2

Try this again.
tz.TZDateTime _convertTime(int hour) {
final tz.TZDateTime now = tz.TZDateTime.now(tz.local);
tz.TZDateTime scheduleDate =
tz.TZDateTime(tz.local, now.year, now.month, now.day, hour, 47);
return scheduleDate;
}