[SOLVED] Inject Usecases with having more than one parameter using andorid koin dependency injection

Inject Usecases with having more than one parameter using andorid koin dependency injection

i was trying to inject usecase with having one parameter using koin dependency injection, and got error Cannot create an instance of class viewmodel, could you please help me how to inject such usecase in android using koin.

My usecase class

class DetailsUseCase(private val repository: Repository) {

    operator fun invoke(id: Int) = repository.getDetails(id)
}

my viewModel Class

class DetailsViewModel(useCase: DetailsUseCase) : ViewModel() {
    
    fun getDetails(id: Int) = useCase(id)
}

my error as follows -

java.lang.RuntimeException: Cannot create an instance of class com.example.package.presentation_layer.DetailsViewModel

Caused by: java.lang.NoSuchMethodException: com.example.package.presentation_layer.DetailsViewModel.<init> []
                                                                                                        at java.lang.Class.getConstructor0(Class.java:3325)
                                                                                                        at java.lang.Class.getDeclaredConstructor(Class.java:3063)
                                                                                                        at androidx.lifecycle.ViewModelProvider$NewInstanceFactory.create(ViewModelProvider.kt:199)

Solution

You need to add the view model to your module. For example:

val appModule = module {
    viewModel {
        DetailsViewModel(
            useCase = get(),
        )
    }
}

and then pass appModule to the modules list when calling startKoin.