Shared Activity with Compose in Kotlin Multiplatform project

Question

I have a problem with setting up an activity that resides in shared code in a KMM project and uses Jetpack Compose. When the activity is in Android source (/app) this works fine. But I'd like to publish a shared (/common) library without any application.

As an example I forked a great minimal KMM+Compose project: https://github.com/cyberhenoch/PeopleInSpace :

• added the compose activity (SharedActivity) to the shared code
• updated the dependencies in shared code androidMain

It compiles fine but at runtime I get:

Process: com.surrus.peopleinspace, PID: 4067 java.lang.NoSuchMethodError: No static method setContent $default(Landroidx/activity/ComponentActivity;Landroidx/compose/runtime/CompositionContext;Lkotlin/jvm/functions/Function0;ILjava/lang/Object;)V in class Landroidx/activity/compose/ComponentActivityKt; or its super classes (declaration of 'androidx.activity.compose.ComponentActivityKt' appears in /data/app/com.surrus.peopleinspace-8P35Dcwzn9_G-xN9YdwFrA==/base.apk) at com.surrus.android.SharedActivity.onCreate(SharedActivity.kt:12)

I tried to add the options described here https://developer.android.com/jetpack/compose/setup#configure_gradle but

• not all can be added to the common module (kotlinOptions?)
• in the original project they are not required and it works perfectly good
• after adding several of them in different combinations it does not even compile ( exception: java.lang.NoClassDefFoundError: org/jetbrains/kotlin/serialization/DescriptorSerializerPlugin at java.base/java.lang.ClassLoader.defineClass1(Native Method) )

What should I do to make it work? Any help would be appreciated.

Answer 1

The change required is adding org.jetbrains.compose plugin.

Basing on IDEA (not Android Studio) template for creating multiplatform project with Compose Jetpack Compose for Desktop (Experimental) -> Mutiplatform uses Kotlin 1.4.30

Project build.gradle.kts

buildscript {
    repositories {
        gradlePluginPortal()
    }
}

...

allprojects{
    ...
    maven { url = uri("https://maven.pkg.jetbrains.space/public/p/compose/dev") }
}

Common module build.gradle.kts

plugins{
    ...
    id("org.jetbrains.compose") version "0.3.1"
}

Apart from that after adding the plugin Android Studio messed up the modules showing "no module selected" error and the issue described in this question . But opening it in IDEA showed an option to fix multimodule gradle project. I fixed it this way and reopened in Android Studio.

The changes required can be seen in the example repo .

AS version 2020.3.1 Canary 15 & IDEA version Community 2021.1

ThanksJohn O'Reilly !

Answer 2

I have a problem with setting up an activity that resides in shared code in a KMM project and uses Jetpack Compose. When the activity is in Android source (/app) this works fine. But I'd like to publish a shared (/common) library without any application.

As an example I forked a great minimal KMM+Compose project: https://github.com/cyberhenoch/PeopleInSpace :

• added the compose activity (SharedActivity) to the shared code
• updated the dependencies in shared code androidMain

It compiles fine but at runtime I get:

Process: com.surrus.peopleinspace, PID: 4067 java.lang.NoSuchMethodError: No static method setContent $default(Landroidx/activity/ComponentActivity;Landroidx/compose/runtime/CompositionContext;Lkotlin/jvm/functions/Function0;ILjava/lang/Object;)V in class Landroidx/activity/compose/ComponentActivityKt; or its super classes (declaration of 'androidx.activity.compose.ComponentActivityKt' appears in /data/app/com.surrus.peopleinspace-8P35Dcwzn9_G-xN9YdwFrA==/base.apk) at com.surrus.android.SharedActivity.onCreate(SharedActivity.kt:12)

I tried to add the options described here https://developer.android.com/jetpack/compose/setup#configure_gradle but

• not all can be added to the common module (kotlinOptions?)
• in the original project they are not required and it works perfectly good
• after adding several of them in different combinations it does not even compile ( exception: java.lang.NoClassDefFoundError: org/jetbrains/kotlin/serialization/DescriptorSerializerPlugin at java.base/java.lang.ClassLoader.defineClass1(Native Method) )

What should I do to make it work? Any help would be appreciated.