Using the new Compose Type-Safe Navigation. How ca...

# compose

[Tom Truyen]

Using the new Compose Type-Safe Navigation. How can you check if the currentBackstackEntry is a specific route?

val backStackEntry by navController.currentBackStackEntryAsState()

LaunchedEffect(backStackEntry) {
    val route: Route = backStackEntry?.toRoute() // Always returns null, even when backStackEntry route is not null
}

I currently am using a workaround using the qualified name:

val route = backStackEntry?.destination?.route == Screen.Profile::class.qualifiedName

Though I would prefer a better method.

I personally would expect that if I do toRoute() I could do a check like route is Screen.Profile but since toRoute always returns null this check will always fail

The way I have build my routes:

sealed interface Screen {
    sealed interface Auth: Screen {
        @Serializable
        data object Login : Auth

        @Serializable
        data object Register: Auth
    }

    @Serializable
    data object Profile: Screen
}

[Chrimaeon]

https://kotlinlang.slack.com/archives/C0B8M7BUY/p1719960968535549?thread_ts=1719960839.952169&cid=C0B8M7BUY

[Tom Truyen]

Damn overlooked that one because Android Studio was continiously importing another one that wasn't a generic

[Tom Truyen]

Thanks 🙂

[kotlinforandroid]

@Tom Truyen This does't seem to work with NavGraphs or inheritance in my app. hasRoute<Screeb.Auth>() wouldn't work for example.

[Tom Truyen]

Do you have a code snippet?