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I tried to implement your solution but it does not seem to work. Do you have any idea what Im doing wrong?

What I did: Added implementation "androidx.fragment:fragment-ktx:1.3.6"

My Android View Model constructor looks like this:

class MainViewModel(private val app: Application, webApiRepository: IWebApiRepository = WebApiRepository.getInstance(app)) : ViewModelProvider.AndroidViewModelFactory(app)

I also added the create function:

    override fun <T : ViewModel> create(modelClass: Class<T>): T {
        if (modelClass.isAssignableFrom(
                MainViewModel::class.java)) {

            return MainViewModel(app, webApiRepository) as T
        }

        throw IllegalArgumentException("Unknown ViewModel class")
    }

But when I try to use by activityViewModels or viewModels it does not work:

(Remove the two empty spaces) https:// cdn.hashnode .com/res/hashnode/image/upload/v1657015361719/7gYkfO5k8.png

I need to use activityViewModel in order to get a shared ViewModel across fragments. Thanks