@Composable
fun SimpleColumn() {
    Column() {
        repeat(100) {
            Text(text = "Item #$it", style = MaterialTheme.typography.subtitle1)
        }
    }
}

有缺陷，无法进行上下滚动

@Composable
fun SimpleList() {
    val scrollState = rememberScrollState()
    Column(Modifier.verticalScroll(scrollState)) {
        repeat(100) {
            Text(text = "Item #$it", style = MaterialTheme.typography.subtitle1)
        }
    }
}

滑动文字既可以滑动，不要滑动空白区域。那还不是Column

滑动红色这块区域

下面我们写一个滚动列表 用按钮控制滚动

添加依赖

加载网络图片

    implementation 'io.coil-kt:coil-compose:2.1.0'

@Composable
fun ScrollingList() {
    val scrollState = rememberLazyListState()
    val coroutineScope = rememberCoroutineScope()
    val listSize=100
    Column() {
        Row() {
            Button(modifier = Modifier.weight(1f), onClick = {
                coroutineScope.launch {
                    scrollState.animateScrollToItem(0)
                }
            }) {
                Text("Scroll to the top")
            }
            Button(modifier = Modifier.weight(1f), onClick = {
                coroutineScope.launch {
                    scrollState.animateScrollToItem(listSize - 1)
                }
            }) {
                Text("Scroll to the end")
            }
        }

        LazyColumn(state = scrollState) {
            items(listSize) {
                ImageListItem(it)
            }
        }

    }

}

@Composable
fun ImageListItem(index: Int) {
    Row(verticalAlignment = Alignment.CenterVertically) {
        Image(
            painter = rememberImagePainter(data = "https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fpic1.win4000.com%2Fwallpaper%2F2020-10-12%2F5f83b7c13d0b9.jpg&refer=http%3A%2F%2Fpic1.win4000.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1657808691&t=3a05e7dad6f14402a7c14354e302f51b"),
            modifier = Modifier.size(50.dp),
            contentDescription = null
        )
        Spacer(modifier = Modifier.width(10.dp))
        Text(text = "Item #$index", style = MaterialTheme.typography.subtitle1)

    }
}

这里用到了

网络图片

rememberImagePainter

这个东西是做什么用的？

加载网络图片

好像起弃用了

推荐这种写法

@Composable
fun ImageListItem(index: Int) {
    Row(verticalAlignment = Alignment.CenterVertically) {
        Image(
            painter = rememberAsyncImagePainter( "https://gimg2.baidu.com/image_search/src=http%3A%2F%2Fpic1.win4000.com%2Fwallpaper%2F2020-10-12%2F5f83b7c13d0b9.jpg&refer=http%3A%2F%2Fpic1.win4000.com&app=2002&size=f9999,10000&q=a80&n=0&g=0n&fmt=auto?sec=1657808691&t=3a05e7dad6f14402a7c14354e302f51b"),
            modifier = Modifier.size(50.dp),
            contentDescription = null
        )
        Spacer(modifier = Modifier.width(10.dp))
        Text(text = "Item #$index", style = MaterialTheme.typography.subtitle1)

    }
}

点击按钮就可以控制滚动了 非常的好玩。