Flutter Local Notifications show notification every 72 hours - flutter

Question

I am trying to send out notifications every 72 hours. I am using the flutter_local_notifications package. I know I can periodically show notifications but as far as I can see it is limited to these options:
/// The available intervals for periodically showing notifications.
enum RepeatInterval {
/// An interval for every minute.
everyMinute,
/// Hourly interval.
hourly,
/// Daily interval.
daily,
/// Weekly interval.
weekly
}
Is there any way to achieve the 72h interval? I couldn't find anything on this. Let me know if you need any more info! Any help is appreciated!

Answer 1

you can try this :-
fltrNotification = new FlutterLocalNotificationsPlugin();
var scheduledTime = DateTime.now().add(Duration(hour : 72));
fltrNotification.schedule(1, "Times Uppp", task,
scheduledTime, generalNotificationDetails);

Answer 2

always this approach works
make your own copy of package
modify it 😊
1.make your own copy
you can easily copy the package file to your project . and use it like this (flutter doc)
dependencies:
plugin1:
path: ../plugin1/
if you prefer you can fork project and use it like below
dependencies:
plugin1:
git:
url: git://github.com/flutter/plugin1.git
2.modify it 🛠
for your question you can change the value of Daily interval to (3 * Daily interval)
I found this part of code (android - ios)

Answer 3

I would use the flutter cron package if I were you: cron package on pub.dev
It allows you schedule a cron job which is simply a task that runs every x seconds or days, months...
For your example:
fltrNotification = new FlutterLocalNotificationsPlugin();
final cron = Cron();
// Schedule a task that will run every 3 days
cron.schedule(Schedule.parse('0 0 */3 * *'), () async {
// Schedule a notification right now
fltrNotification.schedule(1, "Times Uppp", task,
DateTime.now(), generalNotificationDetails);
print('every three days');
});
If you want to change the frequency, cron is very flexible and you can do pretty much any frequency, the cron syntax is pretty straightforward and their are some websites online that allow you to simply generate it.
There are, of course, several ways to use cron to do what you want. You could schedule a notification for the next 72 hours every 72 hours, refreshing every 24 hours, whatever seems better to you.
(I used part of Piyush Kumar's answer for this example by the way, and updated it to use cron)