How can I use in a Composable the same instance of a viewModel that I have in my MainActivity?

Remove viewModel() and pass it to navHost and from navHost to your Composable

Thanks but how do I pass it to navHost?

You navHost is probably in mainActivity so pass it from there

Here is my NavGraph:

@Composable
fun Navigation() {
    val navController = rememberNavController()
    NavHost(
        navController = navController,
        startDestination = Routes.VERIFY_REMOTE_SCREEN
    ) {
        composable(Routes.VERIFY_REMOTE_SCREEN) {
            VerifyRemoteApp(
                onNavigate = {
                    navController.navigate(it.route)
                }
            )
        }
        composable(Routes.ADDRESS_LIST) {
            AddressListScreen(
                onNavigate = {
                    navController.navigate(it.route)
                }
            )
        }
        composable(
            route = Routes.ADD_EDIT_ADDRESS + "?addressId={addressId}",
            arguments = listOf(
                navArgument(name = "addressId") {
                    type = NavType.IntType
                    defaultValue = -1
                }
            )
        ) {
            AddEditAddressScreen(onPopBackStack = {
                navController.popBackStack()
            }
            )
        }
    }
}

And I get to it with this:

setContent {
            MaterialTheme {
                Navigation()
            }
        }

This is in my MainActivity. Basically I need to pass the viewModel from MainActivity to

VerifyRemoteApp

.

do like this

fun Navigation(viewModel: MainViewModel) {
         //your nav host code
}

OK, I get it, thanks for this!

While that might work I think it could become quite bloated I believe the reason you get a new viewmodel instance as soon as you put it inside a navigation destination is because those are `ViewModelStoreOwner`s and provide themself as a CompositionLocal LocalViewModelStoreOwner, which is used as the default argument in

viewModel()

You should be able to pass the activity as the ViewModelStoreOwner to the

viewModel()

function instead to get the behaviour you want, something along the lines of

= viewModel(
    viewModelStoreOwner = context.getActivity() as ViewModelStoreOwner
)

@Mini thank you for sharing this idea I would follow this practice but I have found that it can be done like this as well

val mainViewModel = LocalViewModelStoreOwner.current?.let {
        viewModel<MainViewModel>(viewModelStoreOwner = it)
}