Kotlin Jetpack Compose LazyColumn 以编程方式滚动到元素

发布于03月20日

Is there any way to programmatically scroll LazyColumn to some item in the list? I thought that it can be done by hoisting the LazyColumn argument state: LazyListState = rememberLazyListState() but I have no idea how I can change this state e.g. on Button click.

推荐答案

With 1.0.x LazyListState supports the scroll position via

the scrollToItem() function, which ‘immediately’ snaps the scroll position,
animateScrollToItem()使用动画滚动

比如:

val listState = rememberLazyListState()
// Remember a CoroutineScope to be able to launch
val coroutineScope = rememberCoroutineScope()

LazyColumn(state = listState) {
    // ...
}

Button (
    onClick = { 
        coroutineScope.launch {
            // Animate scroll to the 10th item
            listState.animateScrollToItem(index = 10)
        }
    }
){
    Text("Click")
}