I m setting up my project including both desktop and android

Question

I m setting up my project including both desktop and android to run in multiple environments but the error below occurred How can I run my project in different environments ```org gradle api InvalidUserCodeException Only one of the JVM targets can be configured to work with Java The target common is already set up to work with Java cannot setup another target dev ```

Dragos Rachieru · Answer

You should create different modules instead of a single module

Dragos Rachieru · Answer

`common` your common module for interfaces `dev` `mock` `sit` `uat` `prod` All of these should be depending on `common` and implement the interfaces in their own way

lhwdev · Answer

Or if there is some dependency enable mpp hierarchy `kotlin mpp enableGranularSourceSetsMetadata = true` and insert `dependsOn`

Big Chungus · Answer

Or just try to not use withJava

Long Tran · Answer

< Big Chungus> without withJava only work with the desktop only project

Big Chungus · Answer

Really Why Can t you use android and jvm targets to separate the two ends

Long Tran · Answer

I have a commonUI module that has jvm and android targets and i implement the commonUI module in my desktop app If i remove `withJava ` from my desktop app it will leave the message ```Unable to find Gradle tasks to build desktopApp devMain Build mode COMPILE JAVA Tests All ``` and nothing happen but `withJava ` made it run

Big Chungus · Answer

Ok makes sense Thanks for clarifying

Long Tran · Answer

< Dragos Rachieru> your idea sounds great but I don t fully understand it yet Do you have any sample code or any document related to it It would be great if you can share them with me

Dragos Rachieru · Answer

`common src commonMain ExampleRepository kt` ```interface ExampleRepository kt fun getExamples List lt String gt ``` `dev src commonMain ExampleRepositoryImpl kt` ```class ExampleRepositoryImpl private val devNetworkSource NetworkSource ExampleRepository override fun getExamples List lt String gt = devNetworkSource fetch ``` `mock src commonMain ExampleRepositoryImpl kt` ```object ExampleRepositoryMock ExampleRepository override fun getExamples List lt String gt = List 10 Mock $it ```

Dragos Rachieru · Answer

and in your app module you add your dependencies and decide which implementation you want to use I don t know how to explain this further you should learn more about dependency injection and type inference

Dragos Rachieru · Answer

`dev build gradle kts` ```implementation common ``` `mock build gradle kts` ```implementation common ``` `app build gradle kts` ```implementation common implementation dev implementation mock ``` `app src main kotlin ExampleRepositoryProvider kt` ``` fun provideExampleRepository appType AppType ExampleRepository return when appType AppType Mock gt ExampleRepositoryMock AppType Dev gt ExampleRepositoryImpl createDevNetworkSource ```

Long Tran · Answer

Thanks for sharing your comments are very detailed and helpful +1