Does anyone know how to get a BottomAppBar to hide upon scroll of a LazyColumn?

# compose

[dewildte]

Does anyone know how to get a BottomAppBar to hide upon scroll of a LazyColumn?

[Lucien Guimaraes]

Just use LazyListState for your LazyColumn and with isScrollInProgress you know if the list is being scrolled

[Bradleycorn]

But which direction is it being scrolled?

[Bradleycorn]

Do I have to calculate that myself?

[Lucien Guimaraes]

isScrollInProgress is just a boolean to know if you are scrolling the list. I you need to know the direction, it might be done with InteractionSource (never used this API but it could be worth checking)

[Lucien Guimaraes]

you can also check for firstVisibleItemScrollOffset

[Timo Drick]

You could also use nestedScroll modifier. Than you could calculate the direction. But of course a little bit more complicated. I think this sample code does exactly what you want:
https://developer.android.com/reference/kotlin/androidx/compose/ui/input/nestedscroll/package-summary#(androidx.compose.ui.[…]estedScrollDispatcher)

[dewildte]

Oooh

[dewildte]

This looks promising!

[dewildte]

Thanks folks!

[allan.conda]

@dewildte 👋 were you able to get it to work?

[dewildte]

@allan.conda I have not had time to focus on implementing that feature yet, sorry.

[allan.conda]

I see, no worries! 🙏