IssueTracker

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