Any guides to compose navigation with bottomNav wi...

# compose

[Colton Idle]

Any guides to compose navigation with bottomNav with a sign in flow?

I used these docs when setting up my app https://developer.android.com/jetpack/compose/navigation#bottom-nav
but now when I open the app on a cold launch (and the user isn't logged in), I see my HomeScreen for a split second with my bottom nav and then I go to my sign in screen which doesn't have bottom nav and it's just kinda jarring from the user POV. Curious if there's some best practices with bottom nav and sign in combined.

[Nick]

Would something like this work?

val navController = rememberNavController()
Scaffold(
  bottomBar = {
if(user.isloggedIn() {
   BottomNavigation()
  }
}
)

?

[Nick]

and for the content part:

when(user.isLoggedIn){
   true -> HomeScreen()
   false -> Login()
}

[Nick]

you shouldn’t see the flicker then

[Nick]

but user.isLoggedIn should be a state though, with the default value of false

[Ian Lake]

Note that this next Navigation release removes the initial flicker caused by Navigation's state not being set for the first composition

[Colton Idle]

Interesting. Maybe That's the issue. Any other tips or should I wait for that?

[Nick]

oh there’s a bug? does my solution not work?

[Colton Idle]

I was mostly just commenting on the fact that maybe my impl wasn't "wrong" at all, it's just that navigation lib needs an update.

Regarding your solution Nick, I haven't tried it but I was curious to what Ians opinion on it is. So far I have all of my user.isLoggedIn checking being done on the composable Screen level as per Ians recommendation and so I'd like to keep all of that logic there.

[Nick]

ahh that sounds like a better way.