IssueTracker

Component used: ViewModel Version used: 2.3.1 Devices/Android versions reproduced on: Emulator API 29

I just want to share a ViewModel object across navigation changes (using Jetpack Compose). I mean, ScreenA is instantiating MyViewModel using viewModel() function. When I navigate (using Jetpack Navigation for Compose) to ScreenB and call viewModel() from there, it returns a different instance.

My current solution is a little ugly...

NavHost(navController = navController, startDestination = ROUTE_WELCOME) {
    ...
    composable(ROUTE_SCREEN_A) {
        ScreenA(
            onNext = { navController.navigate(ROUTE_SCREEN_B) }
        ) // inside of this function, I'm calling viewModel()
    }
    composable(ROUTE_SCREEN_B) {
        // TODO improve this
        val vm = ViewModelProvider(navController.previousBackStackEntry!!)
                .get(MyViewModel::class.java)
        ScreenB(vm)
    }
}

There's no viewModel() method that takes a ViewModelStoreOwner. It just always uses the LocalViewModelStoreOwner.current.