android - 在 Compose 中使用 DeepLink 会导致无法向后导航

Question

我有一个 FirebaseMessagingService 子类，它接收通知有效负载，然后使用以下 PendingIntent 创建推送通知:

        TaskStackBuilder.create(this).run {
            addNextIntentWithParentStack(
                Intent(
                    Intent.ACTION_VIEW,
                    "eway://traversals_monthly_bill_details".toUri()
                )
            )
            getPendingIntent(2345, PendingIntent.FLAG_UPDATE_CURRENT)
        }

以下是我们导航的各个嵌套图的可组合项:

    composable(Screens.INTERMEDIATE_MONTHLY_BILLINGS.navRoute,
        deepLinks =
        listOf(
            navDeepLink {
                uriPattern =
                    "eway://traversals_monthly_bill_details"
            }
        )) {
        IntermediateMonthlyBillings({ statements ->
            val lastIndex = statements.lastIndex
            val gson = GsonBuilder().create()
            val statementsByYearJson = gson.toJson(statements)
            navController.navigate("${Screens.MONTHLY_BILLINGS}/$statementsByYearJson/$lastIndex")
        })
    }
    composable("${Screens.MONTHLY_BILLINGS.navRoute}/{statementsByYear}/{initialIndex}",
        arguments = listOf(
            navArgument("statementsByYear") {},
            navArgument("initialIndex") {
                type = NavType.IntType
            }
        )
    ) {
        val gson = GsonBuilder().create()
        val statementsByYear = gson.fromJson(
            it.arguments?.getString("statementsByYear"),
            AllStatementsByYear::class.java
        )
        MonthlyBillings(statementsByYear, it.arguments?.getInt("initialIndex")!!)
        updateCurrentScreen(Screens.MONTHLY_BILLINGS)
    }

这是中间屏幕:

@Composable
fun IntermediateMonthlyBillings(
    onDataAcquired: (AllStatementsByYear) -> Unit,
    myEwayLoggedInViewModel: MyEwayLoggedInViewModel = get()
) {
    val statementsByYear by myEwayLoggedInViewModel.statementsByYear.observeAsState(null)

    if (statementsByYear == null) {
        GenericLoader(type = MyLoaderType.LIGHT_BACKGROUND)
    }
    LaunchedEffect(statementsByYear == null) {
        if (statementsByYear != null) {
            onDataAcquired(statementsByYear!!)
        }
    }
}

问题是，虽然深层链接有效，但我被导航到中间屏幕并有回调 onDataAcquired在我收到数据后运行(然后将我导航到 MonthlyBillings 屏幕)，看起来后台堆栈中充满了 MonthlyBillings 或中间屏幕的实例，我不知道为什么。
在我到达深度链接的目的地后，我需要向后退按钮发送垃圾邮件，大约 10 次尝试后，它会开始将我导航回原始堆栈。
我真正想要的是堆栈只有最终目标屏幕(MonthlyBillings)以及如果用户手动导航(例如 ScreenA、ScreenC、ScreenF、MonthlyBillings)将具有的一系列后台条目。

Answer 1

在 NavGraph 的中间体 composable 中记录 backQueue 目标路由后就好了像这样的目的地:

 composable(Screens.INTERMEDIATE_MONTHLY_BILLINGS.navRoute,
        deepLinks =
        listOf(
            navDeepLink {
                uriPattern =
                    "eway://traversals_monthly_bill_details"
            }
        )) {
        Log.d("PAYMENTSGRAPH", "composable called with backstack ${navController.backQueue}")
        navController.backQueue.forEach {
            Log.d("PAYMENTSGRAPH", it.destination.route.toString())
        }
        IntermediateMonthlyBillings({ statements ->
            Log.d("CALLBACK_PAYMENTSGRAPH", "callback called")
            val lastIndex = statements.lastIndex
            val gson = GsonBuilder().create()
            val statementsByYearJson = gson.toJson(statements)navController.navigate("${Screens.MONTHLY_BILLINGS}/$statementsByYearJson/$lastIndex")
        })
    }

每当我打开深层链接时，我都会注意到以下输出:

2022-07-05 11:24:27.802 16304-16304/[REDACTED]D/PAYMENTSGRAPH: null16304-16304/[REDACTED] D/PAYMENTSGRAPH:splash_screen_graph16304-16304/[REDACTED] D/PAYMENTSGRAPH:splash_screen16304-16304/[REDACTED] D/PAYMENTSGRAPH:payments_graph16304-16304/[REDACTED] D/PAYMENTSGRAPH:payments_traversalsD/PAYMENTSGRAPH: intermediate_monthly_billings16304-16304/[REDACTED] D/PAYMENTSGRAPH:monthly_billings/{statementsByYear}/{initialIndex}

然后我意识到自从 D/PAYMENTSGRAPH: intermediate_monthly_billings从 monthly_billings/{statementsByYear}/{initialIndex} 导航返回后，目的地仍在堆栈中目的地，中间屏幕中的逻辑将再次运行，因此它正在为monthly_billings 屏幕重新创建NavBackStackEntry 并将我导航回那里。如果我足够快地向后退按钮发送垃圾邮件，我可以“超越”游戏，因此它有时可以“工作”。
修复很简单 navController.popBackStack()在从回调中导航到monthly_billings 屏幕之前。这是最终的代码:

    composable(Screens.INTERMEDIATE_MONTHLY_BILLINGS.navRoute,
        deepLinks =
        listOf(
            navDeepLink {
                uriPattern =
                    "eway://traversals_monthly_bill_details"
            }
        )) {
        IntermediateMonthlyBillings({ statements ->
            val lastIndex = statements.lastIndex
            val gson = GsonBuilder().create()
            val statementsByYearJson = gson.toJson(statements)
            navController.popBackStack()
            navController.navigate("${Screens.MONTHLY_BILLINGS}/$statementsByYearJson/$lastIndex")
        })
    }