Plugin not working after publishing

[sajadj313]

Hi all,

I can create events on debug mode and it works very well but once the apk is published, the plugin does not work as expected.

Steps to reproduce:

• In the build mode, execute the code to create a basic event
• flutter clean
• flutter build apk
• install the apk on a real mobile device
• execute the same event creation code

`void _createEvent() async {
final calendar = DeviceCalendarPlugin();

if (!(await calendar.hasPermissions()).data) {
  var result = await calendar.requestPermissions();
  if (!result.data) {
    return;
  }
}

var availableCalendars = await calendar.retrieveCalendars();

if (availableCalendars.data.isEmpty) {
  return;
}

var defaultCalendarId = availableCalendars.data.first.id;

final event = Event(defaultCalendarId,
    title: 'Sajad has created an event',
    allDay: false,
    start: DateTime.now(),
    end: DateTime.now().add(Duration(days: 2)));

event.reminders = [];

event.reminders.add(Reminder(minutes: 10));

var addedEvent = await calendar.createOrUpdateEvent(event);

if (addedEvent.isSuccess) {
  key.currentState.showSnackBar(SnackBar(content: Text('Success')));
} else {
  key.currentState.showSnackBar(
      SnackBar(content: Text(addedEvent.errorMessages.first)));
}

}`

This is the error that I get:
[400] To create or update an event you must provide calendar ID, event with a title and event's start date and end date (where start date must be before end date)

my flutter doctor results:
`
[√] Flutter (Channel stable, v1.12.13+hotfix.7, on Microsoft Windows [Version 10.0.18362.657], locale en-US)
• Flutter version 1.12.13+hotfix.7 at C:\src\flutter
• Framework revision 9f5ff2306b (3 weeks ago), 2020-01-26 22:38:26 -0800
• Engine revision a67792536c
• Dart version 2.7.0

[!] Android toolchain - develop for Android devices (Android SDK version 29.0.2)
• Android SDK at C:\Users\Lenovo\AppData\Local\Android\sdk
• Android NDK location not configured (optional; useful for native profiling support)
• Platform android-29, build-tools 29.0.2
• Java binary at: C:\Program Files\Android\Android Studio\jre\bin\java
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)
! Some Android licenses not accepted. To resolve this, run: flutter doctor --android-licenses

[!] Android Studio (version 3.5)
• Android Studio at C:\Program Files\Android\Android Studio
X Flutter plugin not installed; this adds Flutter specific functionality.
X Dart plugin not installed; this adds Dart specific functionality.
• Java version OpenJDK Runtime Environment (build 1.8.0_202-release-1483-b03)

[√] VS Code (version 1.42.1)
• VS Code at C:\Users\Lenovo\AppData\Local\Programs\Microsoft VS Code
• Flutter extension version 3.8.1

[!] Connected device
! No devices available

! Doctor found issues in 3 categories.
`

Any idea?
Thanks

[bhl09]

Add a line to a Proguard config from here or if you're just testing it, you can try building by flutter build apk --no-shrink