I’m trying to replace the `NavHost` by `AnimatedNavHost`, but I’m having an issue… Using `NavHost` I...

# compose

[nglauber]

I’m trying to replace the NavHost by AnimatedNavHost, but I’m having an issue…
Using NavHost I have this structure:

@Composable
fun AppNavHost(...){
    val navController = rememberNavController()
    NavHost(navController = navController, ...) {
        composable("A") { ScreenA() }
        composable("B") { Feature1NavHost() }
    }
}

In Feature1NavHost I have another NavHost which takes control of the feature navigation. So, ScreenA calls “B” and pops out of the stack. Everything works fine here.
Using AnimatedNavHost, when I press back in the first screen of Feature1NavHost, the display blinks and the application does not finish… 😕 I have to press a lot to close the app.

[Ian Lake]

You'll want to upgrade to Navigation 2.4.0-alpha06 first (since Accompanist Navigation Compose depends on that version). That'll tell you if it is an issue with Navigation or Accompanist

[Chris Miller]

val navController = rememberAnimatedNavController()

[nglauber]

I’m using 2.4.0-alpha06 and accompanist 0.16.1

[nglauber]

@Chris Miller I know. the sample I shown is using NavHost 😉

[Ian Lake]

Also note that there are very few cases where you should actually use nested NavHosts, something we were just talking about earlier today: https://kotlinlang.slack.com/archives/CJLTWPH7S/p1628603770177000?thread_ts=1628589309.155500&cid=CJLTWPH7S

[Ian Lake]

What was saying is that you should verify that using 2.4.0-alpha06 without Accompanist works as you expect, then switch to Accompanist

[Ian Lake]

As of course, Accompanist will inherit any issues of Navigation itself

[nglauber]

This combination is working:

composeAccompanistVersion = '0.14.0'
composeActivityVersion = '1.3.0-rc01'
composeNavigationVersion = '2.4.0-alpha04'
composeVersion = '1.0.0-rc02'

I’ll update the libraries and let you know…

[nglauber]

This combination

composeAccompanistVersion = '0.16.1'
composeActivityVersion = '1.3.1'
composeNavigationVersion = '2.4.0-alpha06'
composeVersion = '1.0.1'

does not work 😕 it does not even open the nested graph

[nglauber]

is there any workaround @Ian Lake?

[Ian Lake]

Given that it works in our sample apps (nested nav hosts included), you're probably better off building a repro project and filing a bug. It is impossible to tell what is going on based on the code you've shared so far

[Ian Lake]

I'd just really make sure you aren't calling navigate as part of composition - any animations will cause you to recompose multiple times (and you really don't want to navigate every frame of your animation)

[nglauber]

think smart I guess I found a possible issue (on my end) related to that… let me see

[nglauber]

I was calling navigate in the composition… 🤦‍♂️ thanks @Ian Lake

[Ian Lake]

Ah, glad you were able to track it down. You're not the only one that ran into that

[nglauber]

Was it working before because has no animation in the previous version?

[Ian Lake]

Correct, in alpha04 and earlier, it was all instant jump cuts so your destination would ~never recompose