IssueTracker

Any update on this?
The request is DiffUtil implementation along with "items" and "indexedItems" functions to support DiffUtil and animations when adding/removing items. the same as the ListAdapter with DiffUtil.

I think there is not much point in coming up with workaround as this is expected to be one of the main features/supports for the DiffUtil (list diffing for adapters). Entire RecyclerView implementations depend on this.

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

commit 957064e95fb19d2e6f1312ff4ca4f7407ee3ee42
Author: Andrey Kulikov <andreykulikov@google.com>
Date:   Wed Oct 06 22:38:46 2021

    Lazy list item reordering animation
   
    Relnote: """Experimental ability to animate Lazy lists item positions was added.
        There is a new modifier available within LazyItemScope called `Modifier.animateItemPlacement()`.
        Usage example:
   
        var list by remember { mutableStateOf(listOf("A", "B", "C")) }
        LazyColumn {
            item {
                Button(onClick = { list = list.shuffled() }) {
                    Text("Shuffle")
                }
            }
            items(list, key = { it }) {
                Text("Item $it", Modifier.animateItemPlacement())
            }
        }
   
        When you provide a key via `LazyListScope.item` or `LazyListScope.items` this modifier will enable item reordering animations. Aside from item reordering all other position changes caused by events like arrangement or alignment changes will also be animated.
        """
   
    Bug: 150812265
    Test: tests for the new behavior in LazyListAnimateItemPlacementTest
    Change-Id: I59e7b8fd3a4a9eb19a15a4704da150bd187a6f24

A       compose/foundation/foundation/integration-tests/foundation-demos/src/main/java/androidx/compose/foundation/demos/PopularBooksDemo.kt
A       compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/LazyListItemPlacementAnimator.kt
M       compose/foundation/foundation/api/restricted_current.txt
M       compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/LazyItemScope.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/LazyListMeasure.kt
M       compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/LazyListState.kt
M       compose/foundation/foundation/api/1.1.0-beta02.txt
M       compose/foundation/foundation/samples/src/main/java/androidx/compose/foundation/samples/LazyDslSamples.kt
A       compose/foundation/foundation/src/androidAndroidTest/kotlin/androidx/compose/foundation/lazy/LazyListAnimateItemPlacementTest.kt
M       compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/LazyListHeaders.kt
M       compose/foundation/foundation/api/restricted_1.1.0-beta02.txt
M       compose/foundation/foundation/api/public_plus_experimental_current.txt
M       compose/foundation/foundation/api/current.txt
M       compose/foundation/foundation/build.gradle
M       compose/foundation/foundation/api/public_plus_experimental_1.1.0-beta02.txt
M       compose/foundation/foundation/integration-tests/foundation-demos/src/main/java/androidx/compose/foundation/demos/ListDemos.kt
M       compose/foundation/foundation/src/commonMain/kotlin/androidx/compose/foundation/lazy/LazyMeasuredItem.kt

https://android-review.googlesource.com/1823296