Using

rememberSaveable

without an explicit key inside a

movableContentOf

block doesn’t persist across config changes - is this expected?

Is there any “fastscroll” library for LazyLists and/or LazyGrid out there? Haven’t found anything. Or Can me someone point how it could be implemented?

In my screen I have a list which can expand/collapse and bottom navigation bar. When I click to expand the last visible items in the screen, it's partial content or atleast half is behind the bar. Is it possible to scroll the list when user expands bottom visible item to make it fully visible so that It's content won't hide ?

Is there a reason to expose properties in a viewmodel as

StateFlow

rather than just state values (e.g. by

by mutableStateOf

)?

I’m sure questions like these are frowned upon, but I’m trying to plan for my own project. Are transition animations coming in the 2.5 release of navigation-compose? Deciding between waiting or integrating the accompanist navigation lib.

I have multiline text and I need to get the position of a specific baseline. With

onTextLayout

I receive

TextLayoutResult

object which has

firstBaseline

or

lastBaseline

. Is there a way to get any Baseline?

Hi, We are migrating our app to compose. we find an issue about a

ComposeView

(basically a TextView) Inside a androidx

ConstraintLayout

inside a

ViewHolder

. We notice that when the

ViewHolder

is Recycled, the

ComposeView

is not resized. It means that for a multi line text, sometimes the

ComposeView

is too small (we lose line) or too big (unwanted margin). We tried

.disposeComposition()

inside the Adapter onRecycled, We tried

setViewCompositionStrategy(
ViewCompositionStrategy.DisposeOnViewTreeLifecycleDestroyed
)

The only thing that worked is ti disable the Recycling

setMaxRecycledViews( 0 )

but we lose benefit of RecyclerView

Why

SideEffect

gets called ever-time my composable is

invalidated

, but same does-not hold true for

LaunchedEffect

? Query in 🧵

Why does

BasicTextField

have a considerable larger width than the text inside it? It messes up visual alignment...

I am trying to add confirmation dialog that has a callback. I've noticed that NavHost has a feature to add dialog to it, but with callback it seems messy as I'd have to return callback to the nested composable in different screen. Any good examples of confirmation dialog with compose?

Are there mutable state set?

Hi, colleagues. Any idea how to make Nested NavHosts with different NavControllers? My current code snapshot causes doubling of navigation event while calling navController::navigateUp()

Hello! In Android Views world creating new objects in

onDraw

callback is considered a bad practice. In compose official docs we see creating instances of Offset, Path, etc. in DrawScope. Is it going to be impacting draw performance the same way as in views? Or we shouldn't care about such things in compose world?

I have a Textfield (1) that is set to readonly. It has Modifier.clickable to open a Dialog that also contains at Textfield (2) and onValueChanged updates Text in (1) . Everything is working exactly as expected. On dismissing the Dialog it disappears and Softkeyboard is hidden as expected but only a moment later the Softkeyboard pops up again. I tried to remove focus in onDismissed also tried to manually hide softkeyboard but none of my attempts worked. I don't know what else to try and I don't understand why it even pops up? Do you have an idea?

I f I wanted to save the state of my state class so that I have it intact when I navigate back to that page, what would be my best bet: Datastore, Saver function, some other way? 🧵

Got a question regarding safely consuming events that are not state from a Flow inside a @Composable context. More in thread 🧵

Is it not possible to load fonts from resources in Compose previews?

I want to know if it's possible to correctly implement something like MaterialTheme.colors.isOnPrimary. 🧵

Does anyone have an idea on why

animateDpAsState

is going way past the

targetValue

(I checked by logging in

onSizeChange

modifier)? I've also specified a

widthIn

max width but that also just gets totally ignored.. Source code example in thread for more context

Is there any way to reset

targetContentZIndex

after a

ContentTransform

animation is done in

AnimatedContent

?

How do i get release position from

PressInteraction.Release

? Currently it only provides

pressPosition

🤔

How do I scope object to a Composable (something like what navigation viewmodel does)?

Any guides on how to build custom

Indication

? 🤔 I am having trouble understanding how do I animate inside

IndicationInstance#ContentDrawScope.drawIndication()

.Problem is, its not a

@Composable

method, which means I can’t use animation API methods such as

animateXXXasState()

Is there anyway I can draw an unclipped shape from a custom

IndicationInstance

’s draw scope ? 🤔 or indication will be always clipped to the parent?

Recomposition in compose - does it go through each node(composable) in the tree and checks if that nodes needs to be updated or not based on last state from slot table?

I’m using navigation-compose and trying to use

popUpTo

correctly. I have a registration flow where I (for illustrative purposes) navigate to

A

->

B

->

C

->

D

->

SignedIn

. When I navigate to my

SignedIn

route like so

navController.navigate("SignedIn") {
    popUpTo("D") { inclusive = true }
}

and then press back the app goes back to

C

. When I continue to press back it goes to

B

and then

A

. It seems like my call to

popUpTo

is ONLY taking

D

off the back stack rather than popping all previous destinations from the back stack. What am I misunderstanding?

Hi Guys, I got an interesting question about jetpack compose margin. As we can implement margin using padding or Spacer; Is it better to use padding instead? I said that because I now each composable is passed through compose, layout, drawing steps and I thought setting padding is just done on layout phase of that composable but Spacer will be passed in 3 phases separately. And Spacer creates extra Layout. Am I right?!

Hi, I'm using

collectAsState()

with a flow that emits new values very frequently, about 10 times a second. The problem is that the

SnapshotStateObserver.applyMaps

property keeps growing and consumes more and more memory over time. This can be reproduced with the code below. A heap dump shows that after 50,000 iterations there is a single instance of

androidx.compose.runtime.snapshots.SnapshotStateObserver$ApplyMap[]

that consumes about 100 MB. As it seems to be by design that

applyMaps

can only grow, is there a fundamental issue with my code, or is there another approach I could use for frequent updates without eventually running out of memory?

class TestState {
    private val scope = CoroutineScope(Dispatchers.Default)
    val value = MutableStateFlow(0)

    init {
        scope.launch {
            while (true) {
                value.value = value.value + 1
                delay(100)
            }
        }
    }
}

@Composable
fun App() {
    val state = remember { TestState() }
    val value = state.value.collectAsState()
    Text("value = ${value.value}")
}

Is there any way to change

Slider

ThumbSize other the to copy the whole code of

Slider

into my project and change that internal value?