savedstate_detailactivity_with_factory.kt

class DetailActivity : AppCompatActivity() {
    @Inject
    internal lateinit var detailViewModelFactory: DetailViewModelFactory
    
    private val viewModel: DetailViewModel by viewModels {
        GenericSavedStateViewModelFactory(detailViewModelFactory, this)
    }

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        // Use viewModel here
    }
}