Material3 CenterAlignedTopAppBar with TopAppBarDefaults.pinnedScrollBehavior() color change on scroll [293665988]

Fixed

Bug

Status Update

No update yet.

Description

vi...@gmail.com

created issue #1

Jul 29, 2023 11:25AM

Jetpack Compose BOM version: 2023.06.01
Jetpack Compose component used: CenterAlignedTopAppBar
Android Studio Build: #AI-223.8836.35.2231.10406996
Kotlin version: 1.9.0

Steps to Reproduce or Code Sample to Reproduce:

Here is github link:

https://github.com/vladimirlogachov/MoviesPot/blob/master/app/src/main/java/com/vlohachov/moviespot/ui/movies/upcoming/UpcomingMovies.kt

Video that shows the issue is in attachments.

Screen_recording_20230729_131557.mp4

2.7 MB

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Comments

vi...@gmail.com <vi...@gmail.com> #2Dec 11, 2023 10:05PM

Same bug here.
I have a LazyVerticalGrid composable with around 100 elements (2 columns) and the scroll is already very laggy. With a SmallAppBar and a scrollbehavior, it is now very very laggy.

ma...@google.com <ma...@google.com> Dec 28, 2023 07:40PM

Reassigned to ma...@google.com.

sg...@google.com <sg...@google.com> #3Jan 2, 2024 09:15PM

Is this a LazyColumn/LazyVerticalGrid performance issue?

We've ported the behavior to material (not material3) and whenever LazyColumn's size and position were being adjusted during a scroll, the scrolling was laggy.

We've also tried to make LazyColumn fill the whole screen and adjust its contentPadding instead, but we got the same result. The scrolling was laggy while contentPadding was being adjusted.

Once the bar is collapsed, the performance seems okay again.

We use ExitUntilCollapsedScrollBehavior.

vi...@gmail.com <vi...@gmail.com> #4Jan 2, 2024 09:23PM

Are you testing on a debug or a release version of your APK?

vi...@gmail.com <vi...@gmail.com> #5Jan 3, 2024 11:53AM

We tried both. It's a bit better in release version but not good enough for production use.

We tested on physical Pixel 3a with API 32.

Screen_recording_20240103_124946.mp4

4.9 MB

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il...@gmail.com <il...@gmail.com> #6Jul 19, 2024 05:00PM

Could you provide us with a minimal code that showcase this issue. It can be very helpful!

to...@gmail.com <to...@gmail.com> #7Oct 11, 2024 08:51AM

Might be related to b/330410290 that I filed for too many recompositions when scrolling content behind single-line app bars.

Will keep this one open for now until the fix is merged and pushed for the next alpha.

sg...@google.com <sg...@google.com> Oct 11, 2024 11:50PM

Reassigned to sg...@google.com.

sg...@google.com <sg...@google.com> Nov 25, 2024 02:04PM

Accepted by sg...@google.com.

ap...@google.com <ap...@google.com> #8Nov 26, 2024 07:50AM

Possibly fixed/duplicated by b/297208851

sg...@google.com <sg...@google.com> Nov 26, 2024 07:54AM

Marked as fixed.