kotlinlang #compose

so that the navigation would only happen when the state changed and wouldn’t be explicitly tied to the composition of that composable but that feels like the wrong approach. There is a code example in the thread.

Jaime

10/07/2022, 10:14 PM

Hello all, I have a problem with compose and some small devices when the keyboard is opened immediately it closes by itself but it only happens on small devices video in the thread

louiscad

10/08/2022, 3:28 AM

How to have "fun": Use

import androidx.compose.material3.MaterialTheme

Use

import androidx.compose.material3.Text

in some files Use

import androidx.compose.material.Text

in some other files Regret your career path

🎉 1

🫣 1

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Christoph Wiesner

10/07/2022, 1:55 PM

Hi, i’m trying sth similar discussed in this thread Having a Chat UI which should always scroll to latest items (bottom). having

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LaunchedEffect(items) {
    scrollState.animateScrollToItem(scrollState.layoutInfo.totalItemsCount - 1)
}

Problem I have is that on interaction on the last item (custom view) the last item changes in height bc. it shows more content. How can I make the scrollview scroll not only to the last item but to the very bottom? (Note: i cannot use

reversedLayout

of LazyList bc. I need to be able to determine

firstVisibleItem

(top) for a custom sticky header implementation)

trashcoder

10/08/2022, 10:29 AM

hello, i use a

Slider

and noticed that the

onValueChangeFinished

is executed before the

onValueChange

event when i do not drag the slider but simply click on a new location:

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I/System.out: onValueChangeFinished: 76.77
I/System.out: onValueChange: 15.1843815

when i drag, everything works as expected:

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...
I/System.out: onValueChange: 72.501526
I/System.out: onValueChange: 72.402824
I/System.out: onValueChange: 72.451195
I/System.out: onValueChange: 72.36809
I/System.out: onValueChange: 72.342735
I/System.out: onValueChange: 72.66811
I/System.out: onValueChangeFinished: 72.66811

is this a known issue? EDIT: moved source snippets to thread.

ste

10/08/2022, 2:29 PM

I'm facing a problem with Android 12 overscroll configuration and nested scroll. I'm using

nestedScroll

to detect whether a child

ScrollState

reaches the top, so I can forward the deltas to the parent's

DraggableState

(see video). However, the android 12 stretch overscroll effect seems to use the available deltas (which is expected to perform the animation), but it also consumes them, and it causes my

nestedScroll

onPreScroll

available

parameter to be very close to zero. How can I tell the overscroll effect to not the deltas? (the first clip is how it looks like without the overscroll effect)

Aaron Waller

10/08/2022, 2:59 PM

Hey, It’s me again, the guy who just can’t get his HorizontalPager + LazyVerticalGrid to run smooth… After trying now for several months, again and again, to get the performance right I’m finally at a point where I lost hope. I read/watched everything I could find on Google and YouTube about Jetpack Compose’s performance and tried so many different things. Here is a short breakdown of the things I tried/checked: • No calculations etc in the composable • using remember {} when possible • only using stable data classes • Using @Immutable wrapper classes for my lists • Checked with compiler metric that all composables are skippable • Checked with Layout Inspector for recompositions (No unwanted re-compositions when swiping) • Generated Baseline Profiles for that swipe gesture • Enabled R8 + release build + shrinkResources • Uploaded to Google Play to download it from there so baseline profiles are installed (using Android 12 so no sideloading) • Using a key for my lists • Used Perfetto stack tracing to analyze what’s happening but besides janky frames can’t see anything wrong. (I’m gonna setup a big StackOverflow question the coming days where I explain everything I tried so far in detail) The exact same setup is running totally fine on XML with ViewPager + RecyclerView. The Items inside the LazyVerticalGrid consists of: • 2x TextViews • 1x AsyncImage loaded from URL (512x512) • 2x Icons Now I think all that’s left for me is to switch back to ViewPager + RecyclerView and try out interoperability or does anyone know why HorizontalPager + LazyVerticalGrid performs so poorly and how to fix it? Also is this a known issue and are there maybe some plans for the future to improve the performance?

Ilya Nothen

10/08/2022, 5:27 PM

Hello, how would I fix this:

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Cannot access class 'kotlin.ranges.ClosedFloatingPointRange'. Check your module classpath for missing or conflicting dependencies

There was a similar issue with kotlinx.coroutines but I fixed it by declaring a concrete dependency on it. My project compiles and runs perfectly, but it is just painful to see red underlined project folder name. It started happening after some gradle reload and then didn't go away for a week. Tried refreshing caches, straight up deleting ~/.gradle/caches (this was a disaster) but nothing helped.

Sebastian Höbarth

10/08/2022, 5:58 PM

Hello everyone, it’s me again 😛 I use Accompanist Navigation to animate between screens. I use the example Transition from the Docs of the

AnimatedNavHost

. Navigating from overview to detail screen, the overview has this as exitTransition set. So the current screen should just slide out, although when the transition starts, the UI jumps up and then slides out. I can’t figure out where this Jump originates. Does someone have a similar problem and can pinpoint me in the direction what I’m doing wrong? (Attached a video in the thread)

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exitTransition = {
 when (targetState.destination.route) {
      DetailDestination.route -> slideOutOfContainer(
          AnimatedContentScope.SlideDirection.Left,
          animationSpec = tween(600)
          )
      else -> null
 }
},

FunkyMuse

10/08/2022, 10:43 AM

hey guys, does anyone have an idea how to achieve this with ModalBottomSheetLayout or BottomSheetScaffold?

Young Rock

10/09/2022, 7:18 AM

hey guys, i'm confusing about whether it is appropriate to provide

NavController

in the form of

CompositionLocal

nlindberg

10/09/2022, 8:27 AM

Anyone have a good solution to the situation where you .

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.animateContentSize()

On something that is aligned bottom in a Box, where sizing animation happens before the placing leaving white space below the item during the content size animation ?

Alexandru Hadăr

10/09/2022, 2:28 PM

Can we customise the activity that’s used for @Previews in compose ? In the Compose Tooling documentation (Deploy Preview) it only says that the activity has the same context and permissions. I’m interested in making it edge-to-edge

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Alejandro Rios

10/09/2022, 4:53 PM

In case that if wasn't shared before: https://twitter.com/JorgeCastilloPr/status/1579057096360079361

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Stylianos Gakis

10/09/2022, 5:42 PM

Out of curiosity, has anyone ever tried to use anvil and still get the convenience that Hilt gives with hiltViewModel(), especially when inside a composable destination where you get it scoped to the NavBackStackEntry. I guess I could go with hilt directly, but I really like the syntax anvil allows and the fact that my modules can stay kapt-free, so I’m trying to figure out if I can avoid it before just going with hilt 😅

KotlinLeaner

10/10/2022, 10:14 AM

Hey guys, I want to use

broadcast receiver

in my composable
function. Is it good idea to create in

viewmodel

? I am little bit concern about passing

activity/ context

viewmodel

? Because

viewmodel

has greater

lifecycle

than

composable

. So what is best solution for this?

abu naser

10/10/2022, 12:16 PM

hello guys . i wanted to use

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LazyVerticalStaggeredGrid

from foundation api . here is the link https://developer.android.com/reference/kotlin/androidx/compose/foundation/lazy/staggeredgrid/package-summary but the problem is even after adding

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implementation 'androidx.compose.foundation:foundation-layout:1.2.1'
implementation 'androidx.compose.foundation:foundation:1.2.1'

these two i cant call this compose function . my compose version is 1.2.0 .

KotlinLeaner

10/10/2022, 1:08 PM

Hi, I am using compose version

1.1.1

in my project. I am using

LocalRippleTheme

like this

10/10/2022, 1:55 PM

Is there some way that I can run code when AnimatedContent finishes the animation?

Jakub Wiśniewski

10/10/2022, 2:41 PM

I’m getting bunch of weird looking crashes when I use

ComposeView

within my application. I’ve dug trough all the sources and still cannot find the cause od the problem. TLDR version of it is that I have a list with error view on top of it that contains “refresh” button. Clicking it with my internet off (so that the view will appear) makes my app crash with bunch of compose related logs that do not point in any direction such as:

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java.lang.ArrayIndexOutOfBoundsException: length=3; index=3 -> ViewGroup
java.lang.IllegalArgumentException: Failed requirement -> androidx.compose.ui.node.MeasureAndLayoutDelegate
java.lang.IllegalArgumentException: Failed requirement -> androidx.compose.ui.platform.AndroidComposeView.notifyLayerIsDirty
java.lang.IllegalStateException: Underflow in restore - more restores than saves

Exception Type: Unknown (SIGSEGV)

What is important to mention is that it only happens on RELEASE version of the App. I’ve dissected my app and trying to reproduce the issue on fresh repo but I wasn’t able to, yet. No such problems when I switch to

ComponentActivity

instead of

Fragment

with

ComposeView

as its only view. I don’t have unusual amount of recompositions either - around 2 for state. Would appreciate any kind of help, guidance, ideas what might be the source of my problem.

Luigi Giustiniani

10/10/2022, 3:45 PM

Hello guys! Can I use Emoji2 with jetpack compose?

Gaurav Tyagi

10/10/2022, 5:19 PM

Hi,

Gaurav Tyagi

10/10/2022, 5:19 PM

Fatal Exception: java.lang.IllegalStateException: LayoutNode should be attached to an owner

Erfannj En

10/10/2022, 3:28 PM

Hi, In order to be able to replace texts smoothly, that is, the first line replaces the second, the second replaces the third, etc., what animation do you suggest I use to make this possible?

Sean Proctor

10/10/2022, 7:22 PM

I created a signature pad for Compose. It currently targets Android and JVM. https://github.com/sproctor/SignaturePad/

K 3

Tolriq

10/10/2022, 8:32 PM

What would be the idiomatic way to have a reusable dialog in compose that accept some input and trigger a callback?

KotlinLeaner

10/10/2022, 8:32 PM

Hi, why

Spacer

is not working in simple function?

Alex Petitjean

10/10/2022, 10:47 PM

Could/should a data class with a

@Composable

parameter be marked as

@Immutable

? I've got something like this for controlling what is in a

TopAppBar

as part of a `Scaffold`:

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private data class MyTopAppBarState(
    @StringRes val titleResId: Int,
    val actions: (@Composable RowScope.() -> Unit)?,
)

The contents of the

actions

Composable lambda are `TextButton`s with

onClick

lambdas that would likely reference a ViewModel. I don't know if that matters, but it feels like it might.

Radoslaw Juszczyk

10/11/2022, 7:15 AM

Hello I have three activites, one classic and two with composable layout inside. I am trying to write an espresso test which starts in the Activity A, then clicks something, navigates to the Activity B, then clicks something (inside compose), and navigates to the Activity C and assert something there (on compose). How do I do it? If I use

createEmptyComposeRule

then the Activity C comes blank...

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Michael Elgavi

10/11/2022, 9:08 AM

Has anyone had issues with

TextAlign.Justify

not working on some devices? Specifically having issues with OxygenOS (Nord CE2 Android 12.0)