如何在compose中将activity用作导航器

implementation 'androidx.navigation:navigation-compose:2.4.0-alpha10'

setContent {
    val navController = rememberNavController()
    NavHost(navController, startDestination = "home") {
        // 定义导航目的地
        composable("home") { HomeScreen(navController) }
        composable("details/{itemId}") { backStackEntry ->
            val itemId = backStackEntry.arguments?.getString("itemId")
            DetailsScreen(itemId)
        }
    }
}

@Composable
fun HomeScreen(navController: NavController) {
    // 主屏幕的内容
}

@Composable
fun DetailsScreen(itemId: String?) {
    // 详情屏幕的内容
}

Button(onClick = { navController.navigate("details/123") }) {
    Text("查看详情")
}

val previousBackStackEntry = navController.previousBackStackEntry
val itemId = previousBackStackEntry?.arguments?.getString("itemId")