val navController = rememberNavController()

NavHost(navController, startDestination = "profile") {
    composable("profile") { Profile(...) }
    composable("friendslist") { FriendsList(...) }
    ...
}

fun Profile(navController: NavController) {
    ...
    Button(onClick = { navController.navigate("friends") }) {
        Text(text = "Navigate next")
    }
    ...
}