result from retrieveCalendars() returns id and name = null on Android

[chuckinSpace]

Only on Android (IOS is working fine, same code), I'm getting back a non-empty array with the right amount of calendars (length 2), but the actual fields are all null, (id, name etc..) any ideas? permissions are granted correctly, I tried both on the simulator and on a real device

final calendarsResult = await _deviceCalendarPlugin.retrieveCalendars();

[chuckinSpace]

Well after starting from a brand new project I figured out what was wrong, I was running into this issue flutter/flutter#47517 after I added google sign in, and tried to fix it with one of the accepted answers ===>

buildTypes {
        release {
         signingConfig signingConfigs.debug
            minifyEnabled true
        }
        debug{
            minifyEnabled true
        }
    }

This created the conflict with device Calendar and start to get back null results, I fixed it using the other solution from the issue

Add this to defaultConfig

multiDexEnabled true

That one fixed the original issue and don't mess with device calendar

[bhl09]

We had similar issues previously on release mode, if related, you might want to check the Proguard settings for Android here.

[chuckinSpace]

Yes, I am actually getting that issue now, waiting for some feedback on that there

[devs4522]

I am also facing same issue in release apk only even after applying above changes. Please help if anyone faced and resolved it before. Thanks

[devs4522]

I got it resolved by following Proguard settings. @Brett09 Could you please remove - if you have Proguard enabled, from the readme page because it is confusing . most of new developer dont know whether it is enabled for their project or not. So Make it a mandatory steps rather than optional in installation of this library.

[mcavazotti]

I'm getting the same issue. I'm new to app development and AFAIK I'm not using Proguard (I couldn't find any proguard file), and what @chuckinSpace suggested didn't work for me either....
Am I missing something?

[nickrandolph]

@devs4522 can you suggest the changes to the readme that you'd like to see w.r.t. Proguard settings.
@mmc16 are you seeing this issue in both debug and release?

[mcavazotti]

I solved this issue following this comment.

[PauloBrazilDHPP]

i have the same issue and tried all solutions listed here... nothing worked
when compiled directly on device, it works well... when i submmit to play console, when install the beta on any device doesnt work... any other idea?

[maerlynflagg]

i have the same issue and tried all solutions listed here... nothing worked
when compiled directly on device, it works well... when i submmit to play console, when install the beta on any device doesnt work... any other idea?

yeah same. Windows Android Emulator, all fine. debugging on real device fine. but a release build in Play Store is not working, cause missing or invalid calendar id.

[thomassth]

@PauloBrazilDHPP and @maerlynflagg , can you confirm that you added the appropriate proguard settings?
https://github.com/builttoroam/device_calendar#proguard--r8-exceptions

[maerlynflagg]

@PauloBrazilDHPP and @maerlynflagg , can you confirm that you added the appropriate proguard settings?
https://github.com/builttoroam/device_calendar#proguard--r8-exceptions

yes i can confirm, that is fixed, after i made a proguard on 25 Mar.

this helped me:

#Flutter Wrapper
-keep class io.flutter.app.** { *; }
-keep class io.flutter.plugin.**  { *; }
-keep class io.flutter.util.**  { *; }
-keep class io.flutter.view.**  { *; }
-keep class io.flutter.**  { *; }
-keep class io.flutter.plugins.**  { *; }

#Plugins
-keep class com.builttoroam.devicecalendar.** { *; }