This class provides the dependencies that classes want to function

DependencyComponent .kt

object DependencyComponent {
    fun inject(application: MyApplication) {
        application.networkService = NetworkService(application, "SOME_API_KEY")
        application.databaseService = DatabaseService(application, "dummy_db", 1)
    }

    fun inject(activity: MainActivity) {
        val app = activity.application as MyApplication
        activity.viewModel = MainViewModel(app.databaseService, app.networkService)
    }
}