I’m trying to update a Kotlin Multiplatform project to use convention plugins. I’ve also updated Gra...

# gradle

[Adam S]

I’m trying to update a Kotlin Multiplatform project to use convention plugins. I’ve also updated Gradle from v7 to v8, and thus the Android version from v7 to v8.

The Kotlin docs say “Manually apply an Android Gradle plugin: com.android.application or com.android.library”, but when I do this I get an error:

com.android.build.gradle.internal.BadPluginException: The 'java' plugin has been applied, but it is not compatible with the Android plugins.

Is there an example of how to add the Kotlin Multiplatform plugin and the Android Library plugin?

[mbonnin]

I think it's order dependent, do you have android first?

plugins {
  id("com.android.library")
  id("org.jetbrains.kotlin.multiplatform")
}

[ephemient]

org.jetbrains.kotlin.multiplatform you mean? given that the question mentions multiplatform

[mbonnin]

Right 👍 , editing

[ephemient]

order should not be dependent but what does matter is that you can't use Android and withJava()

[Adam S]

yes that’s right, sorry I should have added it

plugins {
    id("my.conventions.kotlin-multiplatform-jvm")
    id("my.conventions.android-library")
    id("my.conventions.publishing")
}

where my.conventions.kotlin-multiplatform-jvm applies kotlin("multiplatform") and enables jvm(), and my.conventions.android-library applies com.android.library

[mbonnin]

There's and example here

[Adam S]

that’s the one, removing withJava() fixed it, thanks @ephemient