Change Android Integration on pub.dev

[Plateria]

I had the issue, that when i built a release version of my app containing the device_calendar plugin, the retrieve_calendars() function didn't work at all. After finding the solution to my problem #99 i suggest that you should add the following to pub.dev/device_calendar#android-integration, because you have to add the proguard rule anyways to make it work.

android/app/proguard-rules.pro
Mine looks like this:

#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.** { *; }

# You might not be using firebase
# -keep class com.google.firebase.** { *; }
-keep class com.builttoroam.devicecalendar.** { *; }

then in android/app/build.gradle add the following line to buildTypes { release {}}
proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro'

I also use minifyEnabled true and shrinkResources true in the same place.

Finally under android/gradle.properties I have android.enableR8=true, R8 still respects your proguard rules.

This solution is copied from here

[nickrandolph]

An you check the readme (https://github.com/builttoroam/device_calendar) and if changes required, please submit a pr. I will check what's being published to pub.dev and update that when I can.

Thanks

[Plateria]

Yea i checked the README. My suggestion is to change:

If you have Proguard enabled, you may need to add the following to your configuration (thanks to Britannio Jarrett who posted about it here)

to:

If you want to release the app, you have to enable proguard and follow these steps...

[jurgenramirez]

I compiled the application with flutter build apk --release and it did not have any proguard file I followed the steps mentioned but it does not work it still does not write to the calendar, from the emulator it works but when I install the apk on a device it does not work, help please.

[Plateria]

@jurgenramirez Which steps did you exactly do?