Jetpack组合导航：从不同的底部栏屏幕导航到底部栏目的地

Question

BottomBar有4个目的地：ScreenA，ScreenB，ScreenC和ScreenD。

在ScreenA上按下按钮（不是底部栏项）时，我想使用参数转到ScreenB。

导航图

AnimatedNavHost(navController = navController, startDestination = "screen_a") {
    composable("screen_a") {
        ScreenA(navToScreenB = {
            navController.navigate("screen_b?param=1") {
        })
    }
    navigation(
        route = "screen_b",
        startDestination = "screen_b?param={param}",
    ) {
        composable(
            route = "screen_b?param={param}",
            arguments = listOf(navArgument("param") { type = NavType.IntType })
        ) { backStackEntry ->
            val param =  backStackEntry.arguments?.getBoolean("param") ?: 0
            ScreenB(param = param)
        }
        composable(route = "screen_b/details") {
            ScreenB_details(...)
        }
    }
}

底部栏

fun BottomNavigation(navController: NavController, selectedNavigation: Screen) {
    val items = listOf(...)
    BottomNavigation(
        backgroundColor = MaterialTheme.colors.primary
    ) {
        items.forEach { item -> BottomNavigationItem(
                onClick = {
                    navController.navigate(item.screen.route) {
                        navController.graph.startDestinationRoute?.let { route ->
                            popUpTo(route) { saveState = true }
                        }
                        launchSingleTop = true
                        restoreState = true
                    }
                }
            )
        }
    }
}

到目前为止，单击ScreenA上的按钮会将我导航到ScreenB，但参数值始终为0，因为我永远不会传递在navToScreenBlambda中传递的参数。我使用的是compose_version='1.2.0-alpha04'和"androidx.navigation： navation-comuse： 2.5.0-alpha03"

Answer 1

事实证明，路由中的 {param} 和 navArgument（{param}） 必须完全相同，即使路径看起来正确且路由中有 args