Jetpack Compose Navigation Part 2

MainActivity.kt

class MainActivity : ComponentActivity() {
    private lateinit var navController: NavHostController

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContent {
            JetpackComposeUIComponentsTheme {
                navController = rememberNavController()
                Surface(
                    //...
                ) {
                    MainScreen(navController)
                }
            }
        }
    }
}

@Composable
fun MainScreen(
    navController: NavHostController,
) {
    Scaffold(
        content = {
            NavigationComposable(
                navController = navController
            )
        }
    )
}