LazyColumn/Row: Item animations [150812265]

Fixed

Feature

Status Update

Updated by @

1 year 8 months ago

See

https://developer.android.com/jetpack/compose/lists#item-animations

Placement/reordering animations in lists: Available since 1.1.0
Placement/reordering animations in grids: Available since 1.2.0
Placement/reordering animations in staggered grids: Available since 1.5.x betas
Additions/removals animations: In progress

Description

ry...@google.com

created issue #1

Mar 4, 2020 11:45PM

See

Comments

cl...@google.com <cl...@google.com> Apr 9, 2020 11:02AM

Assigned to ry...@google.com.

an...@google.com <an...@google.com> Jun 14, 2021 02:46PM

Reassigned to an...@google.com.

ra...@twinhealth.com <ra...@twinhealth.com> #2Aug 25, 2021 09:07PM

Could you look into it @christofferqa?

The issue is with this class:

class MySpi : Spi {
    @Volatile
    private var myApi: Api? = null

    // Incorrectly rewritten to return null;
    override fun createApi(): Api {
        return myApi ?: synchronized(this) {
            myApi ?: MyApi().also { myApi = it }
        }
    }
}

The error seems to be that the ArgumentPropagator believes that the fieldState of myApi is ExactDynamicType(@NotNull MyApi) while it should be ExactDynamicType(@Nullable MyApi)

It then removes the first branch (assuming myApi is not null):

return myApi ?: synchronized(this) {
            myApi ?: MyApi().also { myApi = it }
        }

is rewritten into:

return myApi

And then it eventually concludes that myApi is always null, replacing the code by

return null

The ArgumentPropagatorCodeScanner analyzes the assignment myApi = it and correctly set join the state to ExactDynamicType(@NotNull MyApi)

However the ArgumentPropagator fails to understand that myApi can be read before being written in the method, relying on the default null value, so it fails to join null to the dynamic type.

an...@google.com <an...@google.com> #3Aug 26, 2021 11:56AM

Yes I can take a look. Would it be possible for you to add a regression test of this issue?

ro...@gmail.com <ro...@gmail.com> #4Oct 2, 2021 08:19AM

Project: r8
Branch: main
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101407

Reproduce field propagation issue with ServiceLoader

Expand for full commit details

Reproduce field propagation issue with ServiceLoader 
 
Bug: b/389737060 
Change-Id: Id850448f68b999194bc0380dfca625f4f68bc31b

Files:

A src/test/java/com/android/tools/r8/ir/optimize/membervaluepropagation/DefaultFieldValueJoinerWithServiceLoaderTest.java

Hash: 6ba9af34b15f2a0d3fe356f6e7a5a4071128aed9
Date: Wed Feb 12 09:31:01 2025

ka...@gmail.com <ka...@gmail.com> #5Oct 4, 2021 11:40AM

Project: r8
Branch: main
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101408

Account for ServiceLoaders in field value propagation

Expand for full commit details

Account for ServiceLoaders in field value propagation 
 
Fixes: b/389737060 
Change-Id: Ide438a8e1b0541f3ce2385087f06f8b9909ab3c5

Files:

M src/main/java/com/android/tools/r8/optimize/argumentpropagation/propagation/DefaultFieldValueJoiner.java
M src/test/java/com/android/tools/r8/ir/optimize/membervaluepropagation/DefaultFieldValueJoinerWithServiceLoaderTest.java

Hash: 692fff07b70f6ee5ac520b179aed5e125a0d4848
Date: Wed Feb 12 09:34:04 2025

sh...@gmail.com <sh...@gmail.com> #6Oct 10, 2021 03:52AM

Project: r8
Branch: 8.9
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101512

Account for ServiceLoaders in field value propagation

Expand for full commit details

Account for ServiceLoaders in field value propagation 
 
Fixes: b/389737060 
Change-Id: Ide438a8e1b0541f3ce2385087f06f8b9909ab3c5

Files:

M src/main/java/com/android/tools/r8/optimize/argumentpropagation/propagation/DefaultFieldValueJoiner.java
M src/test/java/com/android/tools/r8/ir/optimize/membervaluepropagation/DefaultFieldValueJoinerWithServiceLoaderTest.java

Hash: 76cad195cf43c16aa9e7b0203e51662036587e71
Date: Thu Feb 13 10:33:29 2025

ap...@google.com <ap...@google.com> #7Nov 2, 2021 11:15AM

Project: r8
Branch: 8.9
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101522

Version 8.9.28

Expand for full commit details

Version 8.9.28 
 
Bug: b/389737060 
Change-Id: I42c8d3194dc053e3a16eef8ea1c4b3aced6752d6

Files:

M src/main/java/com/android/tools/r8/Version.java

Hash: 668c1778e857c1bc8e3f9308a65ddc01a6c14898
Date: Thu Feb 13 10:33:34 2025

ma...@gmail.com <ma...@gmail.com> #8Nov 22, 2021 04:31PM

Project: r8
Branch: 8.9
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101511

Reproduce field propagation issue with ServiceLoader

Expand for full commit details

Reproduce field propagation issue with ServiceLoader 
 
Bug: b/389737060 
Change-Id: Id850448f68b999194bc0380dfca625f4f68bc31b

Files:

A src/test/java/com/android/tools/r8/ir/optimize/membervaluepropagation/DefaultFieldValueJoinerWithServiceLoaderTest.java

Hash: a76d3e8637b5280dcc972ed9fabc74bb503cc30c
Date: Thu Feb 13 10:33:24 2025

an...@google.com <an...@google.com> #9Nov 22, 2021 04:44PM

Project: r8
Branch: 8.8
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101513

Reproduce field propagation issue with ServiceLoader

Expand for full commit details

Reproduce field propagation issue with ServiceLoader 
 
Bug: b/389737060 
Change-Id: Id850448f68b999194bc0380dfca625f4f68bc31b

Files:

A src/test/java/com/android/tools/r8/ir/optimize/membervaluepropagation/DefaultFieldValueJoinerWithServiceLoaderTest.java

Hash: a63678f7ebb3321af74c9846be9c851e4da78e4f
Date: Thu Feb 13 10:33:55 2025

ro...@gmail.com <ro...@gmail.com> #10Nov 28, 2021 06:20AM

Project: r8
Branch: 8.8
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101514

Version 8.8.35

Expand for full commit details

Version 8.8.35 
 
Bug: b/389737060 
Change-Id: I2361f77b42b529f2cbdfbf60fbe4a95e405ba716

Files:

M src/main/java/com/android/tools/r8/Version.java

Hash: d280891c805561bc120f5f96841b50353e74edfe
Date: Thu Feb 13 10:34:06 2025

an...@google.com <an...@google.com> #11Nov 29, 2021 02:57PM

Project: r8
Branch: 8.8
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101523

Account for ServiceLoaders in field value propagation

Expand for full commit details

Account for ServiceLoaders in field value propagation 
 
Fixes: b/389737060 
Change-Id: Ide438a8e1b0541f3ce2385087f06f8b9909ab3c5

Files:

M src/main/java/com/android/tools/r8/optimize/argumentpropagation/propagation/DefaultFieldValueJoiner.java
M src/test/java/com/android/tools/r8/ir/optimize/membervaluepropagation/DefaultFieldValueJoinerWithServiceLoaderTest.java

Hash: 05dd13d906b60efdf03caea7067dedf67b7c6a2e
Date: Thu Feb 13 10:34:00 2025

sh...@gmail.com <sh...@gmail.com> #12Dec 26, 2021 04:36AM

Project: r8
Branch: 8.7
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101540

Account for ServiceLoaders in field value propagation

Expand for full commit details

Account for ServiceLoaders in field value propagation 
 
Fixes: b/389737060 
Change-Id: Ide438a8e1b0541f3ce2385087f06f8b9909ab3c5

Files:

M src/main/java/com/android/tools/r8/optimize/argumentpropagation/propagation/DefaultFieldValueJoiner.java
M src/test/java/com/android/tools/r8/ir/optimize/membervaluepropagation/DefaultFieldValueJoinerWithServiceLoaderTest.java

Hash: d7dcc9001453052f772056337d3c120dba34fc46
Date: Thu Feb 13 10:34:31 2025

an...@google.com <an...@google.com> #13Jan 10, 2022 03:19PM

Project: r8
Branch: 8.7
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101541

Version 8.7.35

Expand for full commit details

Version 8.7.35 
 
Bug: b/389737060 
Change-Id: Icfb60f565b329600b5f167a496a39a61ebff9ea6

Files:

M src/main/java/com/android/tools/r8/Version.java

Hash: 1be71bdf4455bbc565502b4c3bbbae64608c57a6
Date: Thu Feb 13 10:34:38 2025

Message last modified on Jan 10, 2022 03:19PM

om...@gmail.com <om...@gmail.com> #14Jan 17, 2022 04:00PM

Project: r8
Branch: 8.7
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101515

Reproduce field propagation issue with ServiceLoader

Expand for full commit details

Reproduce field propagation issue with ServiceLoader 
 
Bug: b/389737060 
Change-Id: Id850448f68b999194bc0380dfca625f4f68bc31b

Files:

A src/test/java/com/android/tools/r8/ir/optimize/membervaluepropagation/DefaultFieldValueJoinerWithServiceLoaderTest.java

Hash: 7272540b4f7850ef22543defc221660359704ea2
Date: Thu Feb 13 10:34:26 2025

an...@google.com <an...@google.com> #15Jan 17, 2022 04:18PM

Project: r8
Branch: 8.9
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101512

Account for ServiceLoaders in field value propagation

Expand for full commit details

Account for ServiceLoaders in field value propagation 
 
Fixes: b/389737060 
Change-Id: Ide438a8e1b0541f3ce2385087f06f8b9909ab3c5

Files:

M src/main/java/com/android/tools/r8/optimize/argumentpropagation/propagation/DefaultFieldValueJoiner.java
M src/test/java/com/android/tools/r8/ir/optimize/membervaluepropagation/DefaultFieldValueJoinerWithServiceLoaderTest.java

Hash: 76cad195cf43c16aa9e7b0203e51662036587e71
Date: Thu Feb 13 10:33:29 2025

sl...@gmail.com <sl...@gmail.com> #16Feb 16, 2022 09:41PM

Project: r8
Branch: 8.9
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101511

Reproduce field propagation issue with ServiceLoader

Expand for full commit details

Reproduce field propagation issue with ServiceLoader 
 
Bug: b/389737060 
Change-Id: Id850448f68b999194bc0380dfca625f4f68bc31b

Files:

A src/test/java/com/android/tools/r8/ir/optimize/membervaluepropagation/DefaultFieldValueJoinerWithServiceLoaderTest.java

Hash: a76d3e8637b5280dcc972ed9fabc74bb503cc30c
Date: Thu Feb 13 10:33:24 2025

co...@gmail.com <co...@gmail.com> #17Feb 28, 2022 07:55PM

This should now be fixed in R8 8.7.36, 8.8.36 and 8.9.28.

Message last modified on Mar 2, 2022 04:21PM

jd...@google.com <jd...@google.com> #18Mar 3, 2022 07:58PM

Project: r8
Branch: 8.8
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101518

Version 8.8.36

Expand for full commit details

Version 8.8.36 
 
Bug: b/389737060 
Change-Id: I9ac9a6eda36030b2569bf6839f9b55257f0d2888

Files:

M src/main/java/com/android/tools/r8/Version.java

Hash: d228eeda266e288da18698a2fa464fc97b0303c3
Date: Thu Feb 13 12:31:37 2025

Message last modified on Mar 4, 2022 11:09AM

compose_dialog.mp4

2.4 MB

Download

ch...@gmail.com <ch...@gmail.com> #19Jun 7, 2022 10:04PM

Project: r8
Branch: 8.8
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101547

Fix call to addDataResources in test

Expand for full commit details

Fix call to addDataResources in test 
 
This was added in 8.9. 
 
Bug: b/389737060 
Change-Id: I604550f0c0034256f71c03874eeb4798f7079f18

Files:

M src/test/java/com/android/tools/r8/ir/optimize/membervaluepropagation/DefaultFieldValueJoinerWithServiceLoaderTest.java

Hash: 58502e8fa34f0abe33a254671faf1b74e0668c86
Date: Thu Feb 13 12:30:57 2025

ka...@gmail.com <ka...@gmail.com> #20Jul 30, 2022 08:06PM

Project: r8
Branch: 8.7
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101546

Version 8.7.36

Expand for full commit details

Version 8.7.36 
 
Bug: b/389737060 
Change-Id: Ib57157e3ca8863dcb097a3aa0a1e840c546a4392

Files:

M src/main/java/com/android/tools/r8/Version.java

Hash: de384a5950a14b2244dc74819fffd0306cae7065
Date: Thu Feb 13 12:28:52 2025

Message last modified on Jul 30, 2022 08:11PM

an...@google.com <an...@google.com> #21Aug 1, 2022 12:05PM

Project: r8
Branch: 8.7
Author: Christoffer Adamsen <christofferqa@google.com>
Link: https://r8-review.googlesource.com/101545

Fix call to addDataResources in test

Expand for full commit details

Fix call to addDataResources in test 
 
This was added in 8.9. 
 
Bug: b/389737060 
Change-Id: I04d342dc297474d141362290f9ccf22c48332446

Files:

M src/test/java/com/android/tools/r8/ir/optimize/membervaluepropagation/DefaultFieldValueJoinerWithServiceLoaderTest.java

Hash: 981af34dd96a316d0c11972d80ce31ab301ec6c1
Date: Thu Feb 13 12:28:09 2025

ka...@gmail.com <ka...@gmail.com> #22Aug 2, 2022 02:31AM

Thank you for your patience while our engineering team worked to resolve this issue. A fix for this issue is now available in:

Android Studio Meerkat Feature Drop | 2024.3.2 Beta 1
Android Gradle Plugin 8.10.0-beta01

We encourage you to try the latest update.

If you notice further issues or have questions, please file a new bug report.

Thank you for taking the time to submit feedback — we really appreciate it!

ma...@quantox.com <ma...@quantox.com> #23Oct 5, 2022 08:07AM

The fixes for this issue are now also available in:

Android Studio Meerkat | 2024.3.1 Patch 1
Android Gradle Plugin 8.9.1

We encourage you to try the latest update.

If you notice further issues or have questions, please file a new bug report.

an...@google.com <an...@google.com> #24Oct 5, 2022 01:14PM

Yes, as multiple items put into LazyVerticalGrid slot by default are stacked like in a Box I recommend wrapping them into extra Column and adding Modifier. animateItemPlacement().
Can I ask for future to file separate bugs for questions like this as any new comment it this bug is currently sending an email to everyone who +1ed this bug. Thanks!

ra...@twinhealth.com <ra...@twinhealth.com> #25Mar 2, 2023 08:03AM

Any update on this? this ticket is still open for quite sometime, basic animations should always be available, especially for list items, item placement animations are not enough, there should be a way to also add exit/enter animations as well.

ka...@gmail.com <ka...@gmail.com> #26Mar 2, 2023 08:06AM

yeah they said this is not WIP (adding item addition or removal animations).
People are trying to come up with hacky answers on Stackoverflow without much success or any convenience.

this might not even be in backlog...

Message last modified on Jun 15, 2023 10:34AM

kl...@gmail.com <kl...@gmail.com> #27Mar 2, 2023 08:14AM

Who said that when? Source please. If that would be true, this ticket would be closed already.

https://developer.android.com/jetpack/androidx/compose-roadmap clearly states that "Lazy item animations" are in focus.

ka...@gmail.com <ka...@gmail.com> #28Mar 2, 2023 08:16AM

Its literally 6 answers above, post number #21 , they are not even planning it.

kl...@gmail.com <kl...@gmail.com> #29Mar 2, 2023 08:26AM

That was a misunderstanding there, adapter.notifyItemChanged(index) relates to content changes to one item. This is what they are not planning to release an api for. So they did not even talk about add/remove animations. Let's not spam all > 500 observers here

an...@google.com <an...@google.com> #30Mar 2, 2023 10:18AM

I can confirm we are working on add/remove animations right now. Sorry, can't confirm dates or how it will work yet.

il...@gmail.com <il...@gmail.com> #31Jul 27, 2023 06:47AM

Can you please provide any status update / dates if possible?

rl...@gmail.com <rl...@gmail.com> #32Aug 3, 2023 03:32PM

+1 here, any status update or estimate on when this will be supported? This is a major blocker for us using Compose in our app as we have a number of dynamic lists that require animations. At least maybe a date would be helpful.

Message last modified on Aug 9, 2023 06:23PM

pe...@gmail.com <pe...@gmail.com> #33Aug 9, 2023 05:36PM

Any updates on this? Would love to use Compose for a project but this is definitely a blocker.

jo...@google.com <jo...@google.com> #34Sep 24, 2023 03:39PM

Hi, the Play store team is working on a feature which could greatly benefit from LazyColumn's addition/deletion animation support. Do you have an updated ETA that you can share with you? Thanks!

da...@gmail.com <da...@gmail.com> #35Nov 14, 2023 06:20AM

Comment has been deleted.

Message last modified on Nov 20, 2023 04:04AM

deleted

0 B

deleted

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ry...@google.com <ry...@google.com> #36Nov 18, 2023 06:04AM

Comment #35: Please don't use feature tickets as a place to ask for debugging assistance. If you have a reproducible Compose bug, please file that as a separate bug (and don't use images of code - we can't copy-paste from images).

Message last modified on Nov 18, 2023 06:05AM

ka...@gmail.com <ka...@gmail.com> #37Nov 18, 2023 06:33AM

its almost been 2 years now and even your internal teams at play store are asking for the item addition deletion animations, I was the first to bring this up in this thread first.

Is there any ETA on this ? It was a core functionality with DiffUtils which we shouldnt find workarounds as an implementation for Compose !

Could anyone from Google please share an ETA on this

Message last modified on Nov 18, 2023 06:34AM

an...@google.com <an...@google.com> #38Nov 20, 2023 02:30PM

Hello. We are currently finializing the design for the underlying mechanism we will be using for the disappearance animations. Sorry, we can't give exact estimations, but I can reassure you this feature is in works

mo...@gmail.com <mo...@gmail.com> #39Jan 17, 2024 02:10PM

what's the update for this feature ?

Message last modified on Jan 23, 2024 11:05AM

ka...@gmail.com <ka...@gmail.com> #40Feb 5, 2024 08:06AM

bro

ka...@gmail.com <ka...@gmail.com> #41Feb 5, 2024 08:31AM

I kind of agree with the last poster, if we all "bro" the developers every year or month to bump the thread, they might feel pressured to finish the removal/addition animations. Anyways, hang in there champ, they're probably almost done with that last piece of work

Message last modified on Feb 5, 2024 08:33AM

se...@gmail.com <se...@gmail.com> #42Feb 20, 2024 10:41AM

Hello, any updates on this issue?

it...@gmail.com <it...@gmail.com> #43Mar 6, 2024 08:46AM

Any news???

ta...@gmail.com <ta...@gmail.com> #44Mar 6, 2024 08:56AM

Yesterday was the 4th year open anniversary of this issue lol

it...@gmail.com <it...@gmail.com> #45Mar 6, 2024 09:26AM

Compose is a great thing for applications made on knee by startupers at Starbucks) Lol

Message last modified on Mar 6, 2024 09:26AM

mu...@gmail.com <mu...@gmail.com> #46Mar 6, 2024 01:47PM

Any updates??? #38

Message last modified on Mar 6, 2024 01:47PM

ph...@gmail.com <ph...@gmail.com> #47Mar 18, 2024 04:20PM

four years have passed

ko...@gmail.com <ko...@gmail.com> #48Mar 19, 2024 03:31AM

It's coming anytime now (probably not in the next 1-2 releases though): https://android-review.googlesource.com/c/platform/frameworks/support/+/2647907

ap...@google.com <ap...@google.com> #49Mar 20, 2024 02:37PM

Marked as fixed.

Project: platform/frameworks/support
Branch: androidx-main

commit 36578696db7997ec73d1f81ae55e6b61951e7895
Author: Andrey Kulikov <andreykulikov@google.com>
Date: Tue Jul 04 16:14:07 2023

Item disappearance animation for lazy lists

We add support for the disappearance animation for lazy list items. The appearance animation was added as an internal api as part of aosp/2644850. We are using the new graphics layer implementation we recently added as part of aosp/2969199 and a set of preceding cls. This new graphics layer implementation is automatically counting the amount of usages for each layer, meaning that even when the layer is technically released by its main user, the underlying drawn content is not discarded until all the parent layers stop drawing it as well. It allows us to continue drawing the item being removed for the duration of disappearance animation. This logic was added in aosp/2967570.
As part of this cl we made both appearance and disappearance animation support public for LazyColumn and LazyRow. Support for other lazy layouts will be added in the next cls. Support for other types of animations is tracked in

b/330152398

.

Fixes: 150812265
Relnote: Item appearance and disappearance animation support was added into `LazyColumn` and `LazyRow`. Previously it was possible to add `Modifier.animateItemPlacement()` modifier in order to support placement (reordering) animations. We deprecated this modifier and introduced a new non-experimental modifier called `Modifier.animateItem()` which allows you to support all three animation types: appearance (fade in), disappearance (fade out) and reordering.
Test: new LazyListItemDisappearanceAnimationTest
Change-Id: I2d7f7a376cea26c0a36a59a4586d2705ab04cab7

M compose/animation/animation/integration-tests/animation-demos/src/main/java/androidx/compose/animation/demos/lookahead/LookaheadWithAnimateItemPlacement.kt
M compose/foundation/foundation/api/current.txt
M compose/foundation/foundation/api/restricted_current.txt
M compose/foundation/foundation/integration-tests/foundation-demos/src/main/java/androidx/compose/foundation/demos/LazyColumnDragAndDropDemo.kt
M compose/foundation/foundation/integration-tests/foundation-demos/src/main/java/androidx/compose/foundation/demos/ListDemos.kt
M compose/foundation/foundation/integration-tests/foundation-demos/src/main/java/androidx/compose/foundation/demos/PopularBooksDemo.kt
M compose/foundation/foundation/integration-tests/lazy-tests/src/androidTest/kotlin/androidx/compose/foundation/lazy/list/LazyListItemAppearanceAnimationTest.kt
A compose/foundation/foundation/integration-tests/lazy-tests/src/androidTest/kotlin/androidx/compose/foundation/lazy/list/LazyListItemDisappearanceAnimationTest.kt
M compose/foundation/foundation/integration-tests/lazy-tests/src/androidTest/kotlin/androidx/compose/foundation/lazy/list/LazyListItemPlacementAnimationTest.kt
M compose/foundation/foundation/integration-tests/lazy-tests/src/androidTest/kotlin/androidx/compose/foundation/lazy/list/LazyListTest.kt
M compose/foundation/foundation/samples/src/main/java/androidx/compose/foundation/samples/LazyDslSamples.kt
M compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/LazyItemScope.kt
M compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/LazyItemScopeImpl.kt
M compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/LazyList.kt
M compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/LazyListItemAnimator.kt
M compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/LazyListMeasure.kt
M compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/LazyListMeasuredItem.kt
M compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/grid/LazyGridItemPlacementAnimator.kt
M compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/grid/LazyGridItemScopeImpl.kt
M compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/layout/LazyLayoutAnimation.kt
M compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/staggeredgrid/LazyStaggeredGridItemPlacementAnimator.kt
M compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/staggeredgrid/LazyStaggeredGridItemScope.kt

https://android-review.googlesource.com/2647907

an...@google.com <an...@google.com> #50Mar 20, 2024 02:38PM

Item appearance and disappearance animation support was added into LazyColumn and LazyRow. Previously it was possible to add Modifier.animateItemPlacement() modifier in order to support placement (reordering) animations. We deprecated this modifier and introduced a new non-experimental modifier called Modifier.animateItem() which allows you to support all three animation types: appearance (fade in), disappearance (fade out) and reordering.

This change is expected to be released as part of 1.7.0-alpha06 release.

Port of this modifier into lazy grids is tracked here: b/330510929

To staggered grids here: b/330511290

Support of other animation types aside of fade in/fade out is tracked here: b/330152398

ca...@gmail.com <ca...@gmail.com> #51Apr 4, 2024 04:48PM

Hi, I get:

Failed to transform lifecycle-livedata-core-2.8.0-alpha04.aar (androidx.lifecycle:lifecycle-livedata-core:2.8.0-alpha04) to match attributes {artifactType=android-dex, asm-transformed-variant=NONE, dexing-enable-desugaring=true, dexing-enable-jacoco-instrumentation=false, dexing-is-debuggable=true, dexing-min-sdk=26, org.gradle.category=library, org.gradle.dependency.bundling=external, org.gradle.libraryelements=aar, org.gradle.status=release, org.gradle.usage=java-runtime}.

Caused by: [CIRCULAR REFERENCE: java.lang.NullPointerException]

When I try to use 1.7.0-alpha06, any recommendation?

ry...@google.com <ry...@google.com> #52Apr 5, 2024 07:42PM

@comment #51: Please file a separate bug with reproduction steps.

lo...@gmail.com <lo...@gmail.com> #53Oct 9, 2024 05:19PM

Hello, in the doc, under the heading "Item animations", the last sentence that references this issue should be changed, or removed: https://developer.android.com/develop/ui/compose/lists#item-animations

It still says:

Aside from reorderings, item animations for additions and removals is currently in development. You can track the progress in issue 150812265.

jo...@google.com <jo...@google.com> #54Oct 16, 2024 05:11PM

Thank you for letting us know! We've updated the documentation page :)

Issue 150812265

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cl...@google.com <cl...@google.com> Apr 9, 2020 11:02AM

an...@google.com <an...@google.com> Jun 14, 2021 02:46PM

ra...@twinhealth.com <ra...@twinhealth.com> #2Aug 25, 2021 09:07PM

an...@google.com <an...@google.com> #3Aug 26, 2021 11:56AM

ro...@gmail.com <ro...@gmail.com> #4Oct 2, 2021 08:19AM

ka...@gmail.com <ka...@gmail.com> #5Oct 4, 2021 11:40AM

sh...@gmail.com <sh...@gmail.com> #6Oct 10, 2021 03:52AM

ap...@google.com <ap...@google.com> #7Nov 2, 2021 11:15AM

ma...@gmail.com <ma...@gmail.com> #8Nov 22, 2021 04:31PM

an...@google.com <an...@google.com> #9Nov 22, 2021 04:44PM

ro...@gmail.com <ro...@gmail.com> #10Nov 28, 2021 06:20AM

an...@google.com <an...@google.com> #11Nov 29, 2021 02:57PM

sh...@gmail.com <sh...@gmail.com> #12Dec 26, 2021 04:36AM

an...@google.com <an...@google.com> #13Jan 10, 2022 03:19PM

om...@gmail.com <om...@gmail.com> #14Jan 17, 2022 04:00PM

an...@google.com <an...@google.com> #15Jan 17, 2022 04:18PM

sl...@gmail.com <sl...@gmail.com> #16Feb 16, 2022 09:41PM

co...@gmail.com <co...@gmail.com> #17Feb 28, 2022 07:55PM

jd...@google.com <jd...@google.com> #18Mar 3, 2022 07:58PM

ch...@gmail.com <ch...@gmail.com> #19Jun 7, 2022 10:04PM

ka...@gmail.com <ka...@gmail.com> #20Jul 30, 2022 08:06PM

an...@google.com <an...@google.com> #21Aug 1, 2022 12:05PM

ka...@gmail.com <ka...@gmail.com> #22Aug 2, 2022 02:31AM

ma...@quantox.com <ma...@quantox.com> #23Oct 5, 2022 08:07AM

an...@google.com <an...@google.com> #24Oct 5, 2022 01:14PM

ra...@twinhealth.com <ra...@twinhealth.com> #25Mar 2, 2023 08:03AM

ka...@gmail.com <ka...@gmail.com> #26Mar 2, 2023 08:06AM

kl...@gmail.com <kl...@gmail.com> #27Mar 2, 2023 08:14AM

ka...@gmail.com <ka...@gmail.com> #28Mar 2, 2023 08:16AM

kl...@gmail.com <kl...@gmail.com> #29Mar 2, 2023 08:26AM

an...@google.com <an...@google.com> #30Mar 2, 2023 10:18AM

il...@gmail.com <il...@gmail.com> #31Jul 27, 2023 06:47AM

rl...@gmail.com <rl...@gmail.com> #32Aug 3, 2023 03:32PM

pe...@gmail.com <pe...@gmail.com> #33Aug 9, 2023 05:36PM

jo...@google.com <jo...@google.com> #34Sep 24, 2023 03:39PM

da...@gmail.com <da...@gmail.com> #35Nov 14, 2023 06:20AM

ry...@google.com <ry...@google.com> #36Nov 18, 2023 06:04AM

ka...@gmail.com <ka...@gmail.com> #37Nov 18, 2023 06:33AM

an...@google.com <an...@google.com> #38Nov 20, 2023 02:30PM

mo...@gmail.com <mo...@gmail.com> #39Jan 17, 2024 02:10PM

ka...@gmail.com <ka...@gmail.com> #40Feb 5, 2024 08:06AM

ka...@gmail.com <ka...@gmail.com> #41Feb 5, 2024 08:31AM

se...@gmail.com <se...@gmail.com> #42Feb 20, 2024 10:41AM

it...@gmail.com <it...@gmail.com> #43Mar 6, 2024 08:46AM

ta...@gmail.com <ta...@gmail.com> #44Mar 6, 2024 08:56AM

it...@gmail.com <it...@gmail.com> #45Mar 6, 2024 09:26AM

mu...@gmail.com <mu...@gmail.com> #46Mar 6, 2024 01:47PM

ph...@gmail.com <ph...@gmail.com> #47Mar 18, 2024 04:20PM

ko...@gmail.com <ko...@gmail.com> #48Mar 19, 2024 03:31AM

ap...@google.com <ap...@google.com> #49Mar 20, 2024 02:37PM

an...@google.com <an...@google.com> #50Mar 20, 2024 02:38PM

ca...@gmail.com <ca...@gmail.com> #51Apr 4, 2024 04:48PM

ry...@google.com <ry...@google.com> #52Apr 5, 2024 07:42PM

lo...@gmail.com <lo...@gmail.com> #53Oct 9, 2024 05:19PM

jo...@google.com <jo...@google.com> #54Oct 16, 2024 05:11PM

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