Compose Animate Scroll And Centralize Item

animateScrollAndCentralizeItemCompose.kt

fun LazyListState.animateScrollAndCentralizeItem(index: Int, scope: CoroutineScope) {
    val itemInfo = this.layoutInfo.visibleItemsInfo.firstOrNull { it.index == index }
    scope.launch {
        when {
            itemInfo != null -> {
                val center = this@animateScrollAndCentralizeItem.layoutInfo.viewportEndOffset / 2
                val childCenter = itemInfo.offset + itemInfo.size / 2
                this@animateScrollAndCentralizeItem.animateScrollBy((childCenter - center).toFloat())
            }
            else -> {
                this@animateScrollAndCentralizeItem.animateScrollToItem(index)
            }
        }
    }
}

LazyColumn(
state = listState,
modifier = Modifier
.fillMaxSize()
.padding(horizontal = 16.dp),
verticalArrangement = Arrangement.spacedBy(8.dp)
) {
items(rankingUIModel.rankingUIModel.challengeRankingItems) {
ItemQualifying(modifier= Modifier, item = it, onRankingItemPressed = onRankingItemPressed)
}

            coroutineScope.launch {
                rankingUIModel.rankingUIModel.challengeRankingItems.firstOrNull { it.isCurrentUser }
                    ?.let { itCurrentUserItem ->
                        rankingUIModel.rankingUIModel.challengeRankingItems.indexOfFirst { it == itCurrentUserItem }
                            .let { i ->
                                listState.animateScrollAndCentralizeItem(i, this)
                            }
                    }
            }
        }