Will I get the same instance of ViewModel() when I use Hilt as DI in Android Studio project?

Question

I use Hilt as as DI in Android Studio project, I know there are two ways to create the instance of ViewModel().

Way 1

way1: RecordSoundViewModel = hiltViewModel()

Way 2

val way2: RecordSoundViewModel by viewModels()

1: Coudl you tell me if viewModel1, viewModel2, viewModel3 and viewModel4 is the same instance of RecordSoundViewModel?

2: If the four instances are not the same instance of RecordSoundViewModel, how can I get the same instance?

@AndroidEntryPoint
class ActivityMain : ComponentActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)     
        val viewModel3: RecordSoundViewModel by viewModels()
    }

    override fun onNewIntent(intent: Intent?) {
        super.onNewIntent(intent)
        val viewModel4: RecordSoundViewModel by viewModels()
    }
}

@Composable
fun ScreenHome_Line(    
    viewModel1: RecordSoundViewModel = hiltViewModel()
) {

}

@Composable
fun ScreenHome_Recording(   
    viewModel2: RecordSoundViewModel = hiltViewModel()
) {

}



@HiltViewModel
class RecordSoundViewModel @Inject constructor(
    ...
): ViewModel()
{
   ...
}

Answer 1

Yes you can use the same viewmodel instance.

It is understood when the source code is examined.

public class ViewModelLazy<VM : ViewModel> @JvmOverloads constructor(
    private val viewModelClass: KClass<VM>,
    private val storeProducer: () -> ViewModelStore,
    private val factoryProducer: () -> ViewModelProvider.Factory,
    private val extrasProducer: () -> CreationExtras = { CreationExtras.Empty }
) : Lazy<VM> {
    private var cached: VM? = null

    override val value: VM
        get() {
            val viewModel = cached
            return if (viewModel == null) {
                val factory = factoryProducer()
                val store = storeProducer()
                ViewModelProvider(
                    store,
                    factory,
                    extrasProducer()
                ).get(viewModelClass.java).also {
                    cached = it
                }
            } else {
                viewModel
            }
        }

    override fun isInitialized(): Boolean = cached != null
}