I created a library for adding material3 bottom sh...

# feed

[eygraber]

I created a library for adding material3 bottom sheet destinations to androidx-navigation (CMP is supported as well). I'm hoping this is a stop-gap until the Compose team provides their own, but until then, enjoy!

https://github.com/eygraber/compose-material3-navigation

[Hristijan]

when trying to run it on Android, I get this weird


java.lang.IllegalStateException: You cannot access the Navigator’s state until the Navigator is attached

[eygraber]

Hmm I haven't seen anything like that. How are you using it?

[Hristijan]

image.png

[eygraber]

What does backStackNavEntryController do? Also can you send the stacktrace of the crash?

[Hristijan]

@Composable
private fun backStackNavEntryController(navHostController: NavHostController): Triple<NavBackStackEntry?, NavBackStackEntry?, Boolean> {
    val currentEntry by navHostController.currentBackStackEntryFlow.collectAsStateWithLifecycle(
        null
    )

    val previousEntry by remember(currentEntry) {
        derivedStateOf {
            navHostController.previousBackStackEntry
        }
    }

    val hideBottomNavigation by remember(currentEntry) {
        derivedStateOf {
            currentEntry.hideBottomNavigation
        }
    }
    return Triple(currentEntry, previousEntry, hideBottomNavigation)
}

[Hristijan]

java.lang.IllegalStateException: You cannot access the Navigator’s state until the Navigator is attached


https://github.com/eygraber/compose-material3-navigation/blob/21a20f06cd09844f76545dc24a3741acb3ca9731/library/src/androidMain/kotlin/com/eygraber/compose/material3/navigation/ModalBottomSheetNavigator.android.kt#L25

This line crashes

[eygraber]

Can you file an issue on the repo? I'll take a look a little later today.