Android error during build / iOS work: Execution failed for task ':amplitude_flutter:compileDebugKotlin'. about amplitude-flutter

[dutsky]

It is okay to update your kotlin version if you are just starting a new app, but it is not good when your project stops building because amplitude's minor update requires you to update kotlin version for the entire project.
And it seems you need to update your documentation then, because project will not build until you change your kotlin_version(and documentation didn't say anything about it).
Thanks!

[yuhao900914]

@dutsky Just release v3.7.0, which downgrade the kotlin gradle plugin version to 1.3.40 to fix amplitude_flutter incompatible to project with kotlin gradle plugin version < 1.4.0.
Please try it out and let me know if that's still not working.

[yuhao900914]

@yelkamel we recently update our kotlin-gradle-plugin to 1.5.30. Feels like the error might related with that updates.
What's your kotlin version in your project?

[Nico04]

In my case, setting these values resolved the issue :

ext.kotlin_version = '1.5.31'
classpath 'com.android.tools.build:gradle:7.0.3'
gradle-7.0.2-all.zip
multiDexEnabled true

Note : I have another issue now, trying to figure it out

[yuhao900914]

You can also check our example app as a reference.
https://github.com/amplitude/Amplitude-Flutter/blob/main/example/android/build.gradle

This pr includes the example changes when upgrading the kotlin version to 1.5.30.
https://github.com/amplitude/Amplitude-Flutter/pull/68/files

[GlebUstimenkoWMG]

I see the same issue

[yuhao900914]

Can you guys provide an example app? Then I can try to figure out what's the issue is.

[dutsky]

To reproduce this bug:

1. create new flutter app: flutter create testapp
2. add amplitude_flutter: ^3.2.1 to pubspec.yaml (stanza from your official documentation)
3. run it

[yuhao900914]

https://github.com/yuhao900914/flutter_test_app
Here is the flutter example app. It works all fine on android Gradle build and on flutter release build on both APK and app bundle.

After you init the test app and install the amplitude_flutter you need to change the kotlin_version version to 1.5.0 like here, then all works fine. https://github.com/yuhao900914/flutter_test_app/blob/main/android/build.gradle#L2

[dutsky]

Thank you, @yuhao900914! It works! :3

[idrisadetunmbi]

This seems to have changed in v3.9.0. It no longer builds on this version with the subject error.