Created
October 28, 2025 08:42
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Shimmer Effect Jetpack Compose
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| private data class UiState( | |
| val isLoading: Boolean = false, | |
| val data: List<String> = emptyList() | |
| ) | |
| @Composable | |
| fun ShimmerRoute(modifier: Modifier = Modifier) { | |
| var state by remember { mutableStateOf(UiState()) } | |
| LaunchedEffect(Unit) { | |
| state = state.copy(isLoading = true) | |
| delay(3000L) | |
| state = state.copy( | |
| isLoading = false, | |
| data = List(20) { "User #$it" } | |
| ) | |
| } | |
| ShimmerScreen(modifier, state) | |
| } | |
| @Composable | |
| private fun ShimmerScreen(modifier: Modifier = Modifier, state: UiState = UiState()) { | |
| Scaffold(modifier.fillMaxSize()) { padding -> | |
| LazyColumn( | |
| Modifier | |
| .fillMaxSize() | |
| .padding(padding) | |
| ) { | |
| if (state.isLoading) { | |
| items(20) { | |
| Row( | |
| Modifier | |
| .fillMaxWidth() | |
| .padding(horizontal = 20.dp), | |
| verticalAlignment = Alignment.CenterVertically | |
| ) { | |
| Box( | |
| Modifier | |
| .size(48.dp) | |
| .clip(CircleShape) | |
| .shimmer() | |
| ) | |
| Spacer(Modifier.width(8.dp)) | |
| Box( | |
| Modifier | |
| .fillMaxWidth() | |
| .height(40.dp) | |
| .padding(8.dp) | |
| .shimmer() | |
| ) | |
| } | |
| Spacer(Modifier.height(8.dp)) | |
| } | |
| } else { | |
| items(state.data.size) { index -> | |
| Row(Modifier | |
| .fillMaxWidth() | |
| .padding(horizontal = 20.dp)) { | |
| AsyncImage( | |
| model = ImageRequest | |
| .Builder(LocalContext.current) | |
| .data("https://i.pravatar.cc/150?img=${index + 1}") | |
| .crossfade(true) | |
| .build(), | |
| contentDescription = null, | |
| modifier = Modifier | |
| .size(48.dp) | |
| .clip(CircleShape) | |
| ) | |
| Spacer(Modifier.width(16.dp)) | |
| Text( | |
| text = state.data[index], | |
| modifier = Modifier | |
| .padding(start = 8.dp) | |
| .align(Alignment.CenterVertically) | |
| ) | |
| } | |
| Spacer(Modifier.height(8.dp)) | |
| } | |
| } | |
| } | |
| } | |
| } | |
| @Preview | |
| @Composable | |
| fun ShimmerScreenPreview(modifier: Modifier = Modifier) { | |
| ShimmerScreen() | |
| } | |
| @Composable | |
| fun Modifier.shimmer( | |
| baseColor: Color = Color(0xFFE0E0E0), | |
| highlightColor: Color = Color(0xFFF5F5F5), | |
| durationMillis: Int = 1000 | |
| ): Modifier = composed { | |
| val infiniteTransition = rememberInfiniteTransition(label = "shimmer") | |
| val progress by infiniteTransition.animateFloat( | |
| initialValue = 0f, | |
| targetValue = 1f, | |
| animationSpec = infiniteRepeatable( | |
| animation = tween(durationMillis, easing = LinearEasing), | |
| repeatMode = RepeatMode.Restart | |
| ), | |
| label = "shimmer progress" | |
| ) | |
| drawWithCache { | |
| val gradientWidth = size.width / 2 | |
| onDrawWithContent { | |
| drawContent() | |
| val startX = -gradientWidth + (size.width + gradientWidth * 2f) * progress | |
| val endX = startX + gradientWidth | |
| val brush = Brush.linearGradient( | |
| colors = listOf(baseColor, highlightColor, baseColor), | |
| start = Offset(x = startX, y = 0f), | |
| end = Offset(x = endX, y = 0f) | |
| ) | |
| drawRect(brush = brush, blendMode = BlendMode.SrcIn) | |
| } | |
| } | |
| } |
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