如链接中的答案所示，基本上要做的是使用blendMode = BlendMode.SrcIn创建一个目标矩形，并使用触摸或动画更新此矩形。
第一种方法是绘制一个覆盖Icon一半高度的矩形

@Composable
private fun ClipIconSample() {
    val vectorRes2: Painter = painterResource(id = R.drawable.vd_dashboard_active)
    Icon(
        vectorRes2,
        modifier = Modifier
            .drawWithContent {
                val height = size.height

                with(drawContext.canvas.nativeCanvas) {
                    val checkPoint = saveLayer(null, null)

                    // Destination
                    drawContent()

                    // Source
                    drawRect(
                        Color(0xffEC407A),
                        topLeft = Offset(0f, height / 2),
                        size = Size(size.width, size.height / 2),
                        blendMode = BlendMode.SrcIn

                    )

                    restoreToCount(checkPoint)

                }
            }
            .size(100.dp),
        contentDescription = null
    )
}

对于第二个替换颜色与刷子

@Composable
private fun GradientClipIconSample() {
    val vectorRes2: Painter = painterResource(id = R.drawable.vd_dashboard_active)
    Icon(
        vectorRes2,
        modifier = Modifier
            .drawWithContent {
                with(drawContext.canvas.nativeCanvas) {
                    val checkPoint = saveLayer(null, null)

                    // Destination
                    drawContent()

                    // Source
                    drawRect(
                        brush = Brush.sweepGradient(
                            colors = listOf(
                                Color.Green,
                                Color.Cyan,
                                Color.Red,
                                Color.Blue,
                                Color.Yellow,
                                Color.Magenta,
                            )
                        ),
                        blendMode = BlendMode.SrcIn
                    )

                    restoreToCount(checkPoint)

                }
            }
            .size(100.dp),
        contentDescription = null
    )
}

第三个将targetValue更改为

var targetValue by remember {
    mutableStateOf(0f)
}
val progress by animateFloatAsState(
    targetValue = targetValue,
    animationSpec = tween(1000)
)

全面执行

@Composable
private fun FillIconSample() {
    val vectorRes2: Painter = painterResource(id = R.drawable.vd_dashboard_active)
    var targetValue by remember {
        mutableStateOf(0f)
    }
    val progress by animateFloatAsState(
        targetValue = targetValue,
        animationSpec = tween(1000)
    )
    Icon(
        vectorRes2,
        modifier = Modifier
            .clickable(
                interactionSource = MutableInteractionSource(),
                indication = null,
            ) {
                targetValue = if (targetValue == 0f) {
                    1f
                } else {
                    0f
                }
            }
            .drawWithContent {
                val height = size.height * progress

                with(drawContext.canvas.nativeCanvas) {
                    val checkPoint = saveLayer(null, null)

                    val totalHeight = size.height
                    val filledHeight = totalHeight * progress

                    // Destination
                    drawContent()

                    // Source
                    drawRect(
                        Color(0xffEC407A),
                        topLeft = Offset(0f, totalHeight - height),
                        size = Size(size.width, height),
                        blendMode = BlendMode.SrcIn

                    )

                    restoreToCount(checkPoint)

                }
            }
            .size(100.dp),
        contentDescription = null
    )
}

闪光效果是一种渐变，其中进度变化为

@Composable
private fun ShimmerIconSample() {

    val vectorRes2: Painter = painterResource(id = R.drawable.vd_clock_alarm)

    val transition = rememberInfiniteTransition()

    val progress by transition.animateFloat(
        initialValue = 0f,
        targetValue = 1f,
        animationSpec = infiniteRepeatable(
            animation = tween(1500, easing = LinearEasing),
            repeatMode = RepeatMode.Restart
        )
    )

    Icon(
        vectorRes2,
        modifier = Modifier
            .drawWithContent {
                with(drawContext.canvas.nativeCanvas) {
                    val checkPoint = saveLayer(null, null)
                    val canvasWidth = size.width

                    val brush = Brush.horizontalGradient(
                        colors = listOf(
                            Color(0xff616161),
                            Color.White,
                            Color(0xff9E9E9E),
                            Color(0xff616161),
                        ),
                        startX = canvasWidth * progress,
                        endX = canvasWidth * progress * 2f
                    )

                    // Destination
                    drawContent()

                    // Source
                    drawRect(
                        brush = brush,
                        blendMode = BlendMode.SrcIn
                    )

                    restoreToCount(checkPoint)

                }
            }
            .size(100.dp),
        contentDescription = null
    )
}