The number of events that can be obtained on Android and iOS is different. about device_calendar

[MaikuB]

Please elaborate on what you mean by measures. We haven't seen any differences in the code between the versions you've tried that would affect the number of events retrieved. We've also tried adding an outlook.com account to both an Android and iOS device that had two events in the calendar. Upon running the example app, it showed that there were two events on both devices so from what we can see, it is working as expected. Please provide steps to reproduce the problem if you're seeing an issue

[trap0f]

Thank you for checking.
The situation has now improved.

My situation was as follows.

•App
device_calendar 0.2.1+1
flutter_plugins/device_calendar/example/

•Calendar
Google Calendar
(iOS: Settings > Passwords & Accounts > Add Account > Google)

•Event (All day: No)
8/6/2019 1:30 PM - 2:00 PM event1
8/6/2019 3:30 PM - 5:30 PM event2

•Emulator / Simulator
Android: Pixel 3 XL API 28 Android 9.0
iOS: iPhone Xs Max & iPhone 7 iOS 12.4

•Result
Android: event1, event2
iOS: event2

I changed my iOS language setting (Japanese -> English -> Japanese) and now it works fine.
iOS: event1, event2

I don't know the reason, but it seems to be my environmental problem.
I’m sorry for causing you trouble.

[trap0f]

It's a guess.
EventKit may not have updated the synchronization.
Is there the following processing?

refreshSourcesIfNecessary ()
https://developer.apple.com/documentation/eventkit/ekeventstore/1507421-refreshsourcesifnecessary

[MaikuB]

may well be, since you seem to have more luck with reproducing the issue, would you be able to debug and see if that solves it and submit a PR?

[trap0f]

I would like to do so if I could reproduce the event.
But I don't know when I can reproduce it.
At the same time, would you consider adopting 'refreshSourcesIfNecessary()'?

[MaikuB]

Yes but would need to be able validate it works by reproducing the appropriates scenarios. As you say, right now it's only a guess and there could be other factors at play

[MaikuB]

Just a note here that I've tried adding an event through an outlook.com account, called retrieveEvents and the new event was part of the result even without adding refreshSourcesIfNecessary in the iOS code. Wonder if perhaps you're calling retrieveEvents as part of initState method of the stateful widget that represents a page in your application. If that's the case, note that initState isn't invoked when going to back to that page.

[bhl09]

With the latest release (v3.0.0), haven't noticed such issue. As this ticket is outdated, I'm going to close this. Feel free to open a new ticket if you still experience the issue with the latest release.

Please note that there are few breaking changes in newer versions so make sure to follow the changelogs and examples at pub.dev (https://pub.dev/packages/device_calendar) when you're upgrading the plugin.