What’s the

setOwners

method on

ComponentActivity

for? The method calls •

.setViewTreeLifecycleOwner(this)

•

.setViewTreeViewModelStoreOwner(this)

•

.setViewTreeSavedStateRegistryOwner(this)

on the

window.decorView

of

this

, but its only usage (in the

setContent

method) is followed by a call to the

setContentView

on the same

ComponentActivity

receiver.

setContentView

calls

initializeViewTreeOwners

,

open fun initializeViewTreeOwners() {
    window.decorView.setViewTreeLifecycleOwner(this)
    window.decorView.setViewTreeViewModelStoreOwner(this)
    window.decorView.setViewTreeSavedStateRegistryOwner(this)
    window.decorView.setViewTreeOnBackPressedDispatcherOwner(this)
    window.decorView.setViewTreeFullyDrawnReporterOwner(this)
}

which makes the same three calls as

setOwners

and then two more

I can't find the docs for something that I know exists. It was compose talking about Role.Checkbox and how you can set that on a row to get better semantics/a11y. But I can't seem to find it. Anyone happen to know what I'm talking about 😅 My google-fu and ai fu is failing me

Hi guys, I'm working on a KMP project, but it is probably a Compose problem. ModalBottomSheet + LazyColumn issue: Every other upward scroll dismisses the sheet instead of scrolling the list. Want it to only dismiss when LazyColumn is fully at top.

ModalBottomSheet(
    onDismissRequest = onDismissRequest,
    dragHandle = {}
) {
    Box(modifier = Modifier.fillMaxSize().background(...)) {
        AnimatedContent(content) { 
            // switches between different screens, one has LazyColumn
            LazyColumn(modifier = Modifier.fillMaxSize()) {
                // scrollable content
            }
        }
    }
}

Tried: NestedScrollConnection with onPreScroll/onPostScroll consuming scroll when not at top, tracking scroll state with LaunchedEffect + canScrollBackward, applying nestedScroll to both Box and LazyColumn. Any ideas? 🙏

I heard hot reload comes bundled with Compose Multiplatform 1.10. Does Navigation 3 come with it too, or do we need to add it individually?

x-posting this question about the best way to force Compose to repaint

Need some expert guidance on this -- When using Compose Multiplatform, the UI appears horizontally shrunk compared to the native Android version. Here’s the text style I’m using:

@Composable
fun B3TextStyle() = TextStyle(
    fontFamily = proximaNovaFontFamily(),
    fontWeight = FontWeight.Normal,
    fontSize = DimenFont.nonScalingSp(DimenFont.font_14dp),
    color = Colors.color_222222,
    lineHeight = DimenFont.nonScalingSp(DimenFont.font_20dp)
)

However, the text looks compressed and narrower on Compose Multiplatform. Has anyone else faced this issue before? Any suggestions on how to fix or match it with the native appearance? when I use the same font on the native XML side, it renders differently compared to when I use it in the multiplatform setup — it appears noticeably compressed horizontally. also shared the image above of the change

Is there a reason why

AnnotatedString.Builder

does not support

delete

,

replace

etc like

SpannableStringBuilder

does? I’m often stuck with this when migrating code from Android to commonMain. Would also be very useful to have access to the underlying text

String

. This property is a

StringBuilder

but I don’t see why it couldn’t be exposed as a

String

so we can do simple checks like what the last

Char

is.

Hi guys! Have you ever tried to create a Compose Multiplatform Library with a UI that will be used in an iOS native project? I would like to have something like this: • Create a multiplatform module "shared-ui" • Create inside it a button "CustomButton" that uses Material3 • Export the module to a library. I would like to use pods on iOS • Install the pods on an iOS project • In the SwiftUI contentView, import the pod and reuse the button. Is it a good practice? If you have a project that implements it, please share with me an example! Thank you all!

Why does appending 2 values onto

SnapshotStateList

appear atomic? I figured it would recompose twice but does seems to only once. Is it only recomposing come VSync time? Is this guaranteed? (Real use case is navigation 3 where I want to push multiple screens, or rather mutate backstack more deeply and it needs to be in one "transaction")

Hi everyone, is there any sample implementing Shared Element Transition along with Navigation3 ? cant find sample anywhere. thanks

I'm going to be that guy, but what does 'alpha' and 'beta' mean in the context of CMP releases? Is that the same as google's libraries? Is alpha good for production but the API might change kind of thing?

I noticed how I don't need to run any ios simulators to run ios compose tests. How does that work? is the result the same as running the tests on jvm? The reason why I am asking is because I have a bug on iOS and I cannot figure out how to write a failing test for it. I suspect that running the ios test are not really different than running the jvm tests, and as a result I cannot really test this.

In the Google Photos app, one surface appears to have a ripple effect. How could I apply this effect to the top of a bottom sheet?

Have anyone ever tried getting an

java.lang.InterruptedException

when rendering previews in Android Studio? I've recently started getting it from one of our previews as a "Render issue" (the stacktrace states that it was thrown at com.android.tools.rendering.classloading.CooperativeInterruptTransformLoopBreaker.checkLoop(CooperativeInterruptTransform.kt:26)), but I have no clue what caused it. And it doesn't happen all the time at all.

Calling all Compose Multiplatform for Web devs! 🌐 We’re gathering real stories from developers building with Compose Multiplatform for Web. 🗣️ Tell us about your experience – which use case fits your project best? ⚡ Instant web trials 🛠️ Internal applications, such as dashboards and admin panels 🤝 Sharing design system components with colleagues 💡 Or something else? ⚙️ What worked well — and what could be better? 🔗 Share a short note about what you’re building and add a project link if you’d like! The best quotes will be featured on our new Compose Multiplatform for Web landing page to highlight real developer experiences. Drop your thoughts in the thread and help inspire others to try Compose Multiplatform for Web! 💬

Hey! I’m trying to replicate the scroll behavior of a

LazyColumn

similar to what we see in the Gmail app: 1. Pull-to-refresh (PTR) works when the user drags the list with a finger (✅ works by default). 2. PTR indicator doesn’t show when the user scrolls using the mouse wheel (✅ achieved using

pointerInput

+

awaitPointerEventScope

to detect mouse input and disable PTR indicator). 3. Click-and-drag with a mouse should both scroll the list and trigger PTR — just like dragging with a finger (❌ currently stuck here). I tried adding a

draggable

modifier so users can click-and-drag to scroll, but: • There’s no momentum effect - if I scroll fast, the list stops instantly instead of continuing to glide. • It doesn’t trigger PTR either. Has anyone tackled something similar or knows how to achieve point (3)? Any hints or directions would be appreciated 🙏

Hey! Can someone tell me why this is happening? There’s snapping on the right side of the carousel. Thanks!

@OptIn(ExperimentalMaterial3Api::class)
@Composable
fun TodayGoalsCarousel(
    modifier: Modifier = Modifier,
    items: List<@Composable CarouselItemScope.(Int) -> Unit>,
    preferredItemWidth: Dp = 180.dp,
    itemSpacing: Dp = 8.dp,
    contentPadding: PaddingValues = PaddingValues(horizontal = 16.dp)
) {
    key(items.size) {
        val carouselState = rememberCarouselState(itemCount = { items.size })
        HorizontalMultiBrowseCarousel(
            state = carouselState,
            modifier = modifier
                .fillMaxWidth()
                .wrapContentHeight()
                .padding(vertical = 16.dp),
            preferredItemWidth = preferredItemWidth,
            itemSpacing = itemSpacing,
            contentPadding = contentPadding,
        ) { index ->
            items[index].invoke(this, index)
        }
    }
}

Hello everyone, I am developing an iOS application using Kotlin + Compose UI, and I’m seeing a black screen on iOS when switching screens in a Compose Multiplatform app. Looks like a rendering glitch — maybe related to Skia or something else. Has anyone encountered or solved this? Any advice or workaround appreciated! Here’s a short video showing the issue:

What’s the rationale behind

TextIndent

indentation values being

TextUnit

? The problem here is that

TextUnit

does not scale linearly, so we can’t just double the value to get double the margin size. To fudge it, we need access to the

Density

.

Has anyone had any luck getting animated WebP working?

Isn't reading dimensions or other legacy xml resources files in Android, slow for compose. Shouldn't compose warn about this and promote direct constant/enum declaration/usage of things like dimensions and colors potentially strings, in plain kotlin files.

How can one get this snapping behavior on horizontal scroll (LazyRow?) as shown in this video, like

LinearSnapHelper

for

RecyclerView

(solved)

Random observation. If compose resources don't get generated for any reason, try

./gradlew clean

and then a rebuild from the IDE. Worked everytime so far PS: It seems like the dependency >has< to be on common

When do compose resources generated? It's been hit or miss here and spent way too much time with fonts not being generated Having issues with the web target

How is compose resources a dependency and not a plugin? can dependencies generate code?

Does

SnapshotStateList

need to be guarded against concurrent modifications? e.g.

remember {
   derivedStateOf {
    // paging.items is a SnapshotStateList
    paging.items.count { ... }  
  }
}

should I be copying the list before iterating over it in the

derivedStateOf

, or do the semantics of the snapshot system prevent that view of it from being modified concurrently?

Can anyone recommend an implementation of

TopAppBar

that simply takes a single Composable (no slots for nav, title, subtitle, actions, etc) and has support for nested scrolling?

👋 Trying to use a custom font in a Compose Multiplatform (JVM desktop + Android) project. I have a module

:ui

which has the

jvm()

target, in it I'm calling

val myFontFamily = FontFamily(Font(Res.font.myFont, FontWeight.Normal))

and use it. Then I have

:desktopApp

and

:androidApp

modules that depend on

:ui

. On Desktop it's working as expected but on Android I'm getting

NoClassDefFoundError: Failed resolution of: Lorg/jetbrains/compose/resources/FontResources_skikoKt;

What am I missing?

SupportingPaneScaffold - seekBack 🔙 I am on an endeavour to implement predictive in (CMP). As the implementation was doing nothing I tried to call seekBack directly and noticed that it also does nothing. With debugging I realised that the transition property of the SeekableTransitionState is null. Am I missing a crucial setup step? Has anyone observed a similar behaviour?

help, i use this library (https://github.com/Chaintech-Network/ComposeMultiplatformScreenCapture) in my app for screenshot functionality, but when i want to publish to playstore, there error:

The following content provider authorities are in use by other developers: network.chaintech.cmp.screenshot.fileprovider

. How to resolve it, any solution?