小编Nam*_*man的帖子

问题::: 我想创建一个惰性列，一次只能选择或取消选择一个选项。现在，每当我单击惰性列内的行组件时，所有行都会被选中。

代码 ：：：

@Composable
fun LazyColumnWithSelection() {

    var isSelected by remember {
        mutableStateOf(false)
    }
    
    var selectedIndex by remember { mutableStateOf(0) }
    
    val onItemClick = { index: Int -> selectedIndex = index }

    LazyColumn(
        modifier = Modifier.fillMaxSize(),
    ) {
        items(100) { index ->

            Row(modifier = Modifier
                .fillMaxWidth()
                .clickable {
                    onItemClick.invoke(index)
                    if (selectedIndex == index) {
                        isSelected = !isSelected
                    }
                }
                .padding(16.dp),
                horizontalArrangement = Arrangement.SpaceBetween,
                verticalAlignment = Alignment.CenterVertically) {
                Text(text = "Item $index", modifier = Modifier.padding(12.dp), color = Color.White)
                if (isSelected) …

我的代码:::

@Composable
fun VerticalImageCards(toolsList: List<HealthTool>) {
    val domainName = stringResource(id = R.string.media_url)

    FlowRow(mainAxisSpacing = 8.dp,
        crossAxisSpacing = 16.dp,
        modifier = Modifier
            .fillMaxWidth()
            .padding(vertical = 16.dp),
        mainAxisSize = SizeMode.Wrap) {
        for (i in toolsList) {
            val imgUrl = "$domainName${i.url}"
            ToolsCardLayout(cardTitle = i.title, imgUrl = imgUrl)
        }
    }
}

@Composable
fun ToolsCardLayout(
    imgUrl: String,
    cardTitle: String,
) {
    Box(modifier = Modifier.clickable {}) {
        AsyncImage(model = imgUrl,
            contentDescription = null,
            contentScale = ContentScale.Crop,
            modifier = Modifier.fillMaxWidth())
        Box(modifier = Modifier
            .size(32.dp)
            .align(Alignment.TopEnd)) {
            Image(painter …