[英]Jetpack Compose - how to make SwipeToDismiss work on LazyRow?
[英]How to make item appear in the center of the screen Jetpack Compose when using LazyRow or Column?
我一直在努力使 LazyRow 上的第一項在應用程序打開后立即位於屏幕中間。 一旦滾動,捕捉行為就會起作用,但是當應用程序最初打開時,第一個項目不在頁面的中心。
帶有 snapper 和無限滾動的 LazyRow
@OptIn(ExperimentalSnapperApi::class)
@Composable
fun CircularList(
data: List<SingleBox>,
modifier: Modifier = Modifier,
isEndless: Boolean = true
) {
val listState = rememberLazyListState(
if (isEndless) Int.MAX_VALUE / 2 else 0
)
val configuration = LocalConfiguration.current
val screenWidth = configuration.screenWidthDp.dp
val contentPadding = PaddingValues(horizontal = screenWidth / 2) //This moves starting point of item horizontally
BoxWithConstraints {
LazyRow(
state = listState,
modifier = modifier,
contentPadding = contentPadding,
flingBehavior = rememberSnapperFlingBehavior(listState, SnapOffsets.Center, snapIndex = { _, startIndex, targetIndex ->
targetIndex.coerceIn(startIndex - 7, startIndex + 7) //This snaps item to center of page when LazyRow stops moving
})
)
{
items(
count = if (isEndless) Int.MAX_VALUE else data.size, //This makes it scroll infinitly
itemContent = {
val index = it % data.size
CustomItem(data[index]) // item composable
},
)
}
}
}
我認為這里最好的選擇是Accompanist Pager Library 。
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