There is a problem that the calendar schedule that I read with device_calendar is not displayed, so I'm asking for help.

[nicelee777]

"I am refreshing the home widget using workmanager. The widget draws data read from the local DB and the calendar schedule (using Device_Calendar API) onto a Canvas, saves it as an image, and then displays it. Strangely, the calendar schedule does not appear. (The method works correctly when executed directly within the app.) I would like some help to understand which part of workmanager I should check and what could be the problem, so I am writing this post."

---

@pragma("vm:entry-point")
void callbackDispatcher() {
Workmanager().executeTask((taskName, inputData) async {
debugPrint(
'JH: ${DateTime.now().toString()}, Workmanger Doing!!!!!!!!!!!!!!!!!');
CommonData.isWorkManager = true;

return Future.wait<bool?>([
HomeWidgetCalendarMaker(44).sendAndUpdate(),
HomeWidgetCalendarMaker(45).sendAndUpdate(),
HomeWidgetCalendarMaker(55).sendAndUpdate(),
]).then((value) {
return !value.contains(false);
});
});
}

Future<bool?> sendAndUpdate() async {
try {
// Ready to use
await CommonData.init();
await WorktypeHelper().init();
await IsarHelper().initDB();

await _imageMake(); // DB, get the schedule, draw the data imported to Canvas, and save it as an image file.(Prepare images for use in homewidget.)
await _sendData(); // Forwarding information (image) to the widget
await _updateWidget(); // update widget

return true;
} catch (e) {
debugPrint(e.toString());
return false;
}
}