Compose comes with built-in composables and modifiers for handling common animation use cases.

## Built-in animated composables

### Animate appearance and disappearance with `AnimatedVisibility`

![Green composable showing and hiding itself](https://developer.android.com/static/develop/ui/compose/images/animations/animated_visibility_column.gif) **Figure 1.** Animating the appearance and disappearance of an item in a column

The
[`AnimatedVisibility`](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#AnimatedVisibility(kotlin.Boolean,androidx.compose.ui.Modifier,androidx.compose.animation.EnterTransition,androidx.compose.animation.ExitTransition,kotlin.Function1))
composable animates the appearance and disappearance of its content.


```kotlin
var visible by remember {
    mutableStateOf(true)
}
// Animated visibility will eventually remove the item from the composition once the animation has finished.
AnimatedVisibility(visible) {
    // your composable here
    // ...
}https://github.com/android/snippets/blob/1da1d9d645cd1a8e693981900e04d6bc32287a5c/compose/snippets/src/main/java/com/example/compose/snippets/animations/AnimationQuickGuide.kt#L132-L147
```

<br />

By default, the content appears by fading in and expanding, and it disappears by
fading out and shrinking. The transition can be customized by specifying
[`EnterTransition`](https://developer.android.com/reference/kotlin/androidx/compose/animation/EnterTransition)
and
[`ExitTransition`](https://developer.android.com/reference/kotlin/androidx/compose/animation/ExitTransition).


```kotlin
var visible by remember { mutableStateOf(true) }
val density = LocalDensity.current
AnimatedVisibility(
    visible = visible,
    enter = slideInVertically {
        // Slide in from 40 dp from the top.
        with(density) { -40.dp.roundToPx() }
    } + expandVertically(
        // Expand from the top.
        expandFrom = Alignment.Top
    ) + fadeIn(
        // Fade in with the initial alpha of 0.3f.
        initialAlpha = 0.3f
    ),
    exit = slideOutVertically() + shrinkVertically() + fadeOut()
) {
    Text(
        "Hello",
        Modifier
            .fillMaxWidth()
            .height(200.dp)
    )
}https://github.com/android/snippets/blob/1da1d9d645cd1a8e693981900e04d6bc32287a5c/compose/snippets/src/main/java/com/example/compose/snippets/animations/AnimationSnippets.kt#L161-L183
```

<br />

As you can see in the example above, you can combine multiple `EnterTransition`
or `ExitTransition` objects with a `+` operator, and each accepts optional
parameters to customize its behavior. See the references for more information.

#### `EnterTransition` and `ExitTransition` examples

|                                                                                                                                                                                          EnterTransition                                                                                                                                                                                           |                                                                                                                                                                                           ExitTransition                                                                                                                                                                                           |
|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| [fadeIn](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#fadeIn(androidx.compose.animation.core.FiniteAnimationSpec,kotlin.Float)) ![fade in animation](https://developer.android.com/static/develop/ui/compose/images/animation-fadein.gif)                                                                                                             | [fadeOut](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#fadeOut(androidx.compose.animation.core.FiniteAnimationSpec,kotlin.Float)) ![fade out animation](https://developer.android.com/static/develop/ui/compose/images/animation-fadeout.gif)                                                                                                         |
| [slideIn](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#slideIn(androidx.compose.animation.core.FiniteAnimationSpec,kotlin.Function1)) ![slide in animation](https://developer.android.com/static/develop/ui/compose/images/animation-slidein.gif)                                                                                                     | [slideOut](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#slideOut(androidx.compose.animation.core.FiniteAnimationSpec,kotlin.Function1)) ![slide out animation](https://developer.android.com/static/develop/ui/compose/images/animation-slideout.gif)                                                                                                 |
| [slideInHorizontally](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#slideInHorizontally(androidx.compose.animation.core.FiniteAnimationSpec,kotlin.Function1)) ![slide in horizontally animation](https://developer.android.com/static/develop/ui/compose/images/animation-slideinhorizontally.gif)                                                    | [slideOutHorizontally](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#slideOutHorizontally(androidx.compose.animation.core.FiniteAnimationSpec,kotlin.Function1)) ![slide out horizontally animation](https://developer.android.com/static/develop/ui/compose/images/animation-slideouthorizontally.gif)                                                |
| [slideInVertically](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#slideInVertically(androidx.compose.animation.core.FiniteAnimationSpec,kotlin.Function1)) ![slide in vertically animation](https://developer.android.com/static/develop/ui/compose/images/animation-slideinvertically.gif)                                                            | [slideOutVertically](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#slideOutVertically(androidx.compose.animation.core.FiniteAnimationSpec,kotlin.Function1)) ![slide out vertically animation](https://developer.android.com/static/develop/ui/compose/images/animation-slideoutvertically.gif)                                                        |
| [scaleIn](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#scaleIn(androidx.compose.animation.core.FiniteAnimationSpec,kotlin.Float,androidx.compose.ui.graphics.TransformOrigin)) ![scale in animation](https://developer.android.com/static/develop/ui/compose/images/animation-scalein.gif)                                                            | [scaleOut](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#scaleOut(androidx.compose.animation.core.FiniteAnimationSpec,kotlin.Float,androidx.compose.ui.graphics.TransformOrigin)) ![scale out animation](https://developer.android.com/static/develop/ui/compose/images/animation-scaleout.gif)                                                        |
| [expandIn](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#expandIn(androidx.compose.animation.core.FiniteAnimationSpec,androidx.compose.ui.Alignment,kotlin.Boolean,kotlin.Function1)) ![expand in animation](https://developer.android.com/static/develop/ui/compose/images/animation-expandin.gif)                                                    | [shrinkOut](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#shrinkOut(androidx.compose.animation.core.FiniteAnimationSpec,androidx.compose.ui.Alignment,kotlin.Boolean,kotlin.Function1)) ![shrink out animation](https://developer.android.com/static/develop/ui/compose/images/animation-shrinkout.gif)                                                |
| [expandHorizontally](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#expandHorizontally(androidx.compose.animation.core.FiniteAnimationSpec,androidx.compose.ui.Alignment.Horizontal,kotlin.Boolean,kotlin.Function1)) ![expand horizontally animation](https://developer.android.com/static/develop/ui/compose/images/animation-expandhorizontally.gif) | [shrinkHorizontally](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#shrinkHorizontally(androidx.compose.animation.core.FiniteAnimationSpec,androidx.compose.ui.Alignment.Horizontal,kotlin.Boolean,kotlin.Function1)) ![shrink horizontally animation](https://developer.android.com/static/develop/ui/compose/images/animation-shrinkhorizontally.gif) |
| [expandVertically](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#expandVertically(androidx.compose.animation.core.FiniteAnimationSpec,androidx.compose.ui.Alignment.Vertical,kotlin.Boolean,kotlin.Function1)) ![expand vertically animation](https://developer.android.com/static/develop/ui/compose/images/animation-expandvertically.gif)           | [shrinkVertically](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#shrinkVertically(androidx.compose.animation.core.FiniteAnimationSpec,androidx.compose.ui.Alignment.Vertical,kotlin.Boolean,kotlin.Function1)) ![shrink vertically animation](https://developer.android.com/static/develop/ui/compose/images/animation-shrinkvertically.gif)           |

`AnimatedVisibility` also offers a variant that takes a
`MutableTransitionState`. This allows you to trigger an animation as soon as the
`AnimatedVisibility` is added to the composition tree. It is also useful for
observing the animation state.


```kotlin
// Create a MutableTransitionState<Boolean> for the AnimatedVisibility.
val state = remember {
    MutableTransitionState(false).apply {
        // Start the animation immediately.
        targetState = true
    }
}
Column {
    AnimatedVisibility(visibleState = state) {
        Text(text = "Hello, world!")
    }

    // Use the MutableTransitionState to know the current animation state
    // of the AnimatedVisibility.
    Text(
        text = when {
            state.isIdle && state.currentState -> "Visible"
            !state.isIdle && state.currentState -> "Disappearing"
            state.isIdle && !state.currentState -> "Invisible"
            else -> "Appearing"
        }
    )
}https://github.com/android/snippets/blob/1da1d9d645cd1a8e693981900e04d6bc32287a5c/compose/snippets/src/main/java/com/example/compose/snippets/animations/AnimationSnippets.kt#L191-L213
```

<br />

#### Animate enter and exit for children

Content within `AnimatedVisibility` (direct or indirect children) can use the
[`animateEnterExit`](https://developer.android.com/reference/kotlin/androidx/compose/animation/AnimatedVisibilityScope#(androidx.compose.ui.Modifier).animateEnterExit(androidx.compose.animation.EnterTransition,androidx.compose.animation.ExitTransition,kotlin.String))
modifier to specify different animation behavior for each of them. The visual
effect for each of these children is a combination of the animations specified
at the `AnimatedVisibility` composable and the child's own enter and
exit animations.


```kotlin
var visible by remember { mutableStateOf(true) }

AnimatedVisibility(
    visible = visible,
    enter = fadeIn(),
    exit = fadeOut()
) {
    // Fade in/out the background and the foreground.
    Box(
        Modifier
            .fillMaxSize()
            .background(Color.DarkGray)
    ) {
        Box(
            Modifier
                .align(Alignment.Center)
                .animateEnterExit(
                    // Slide in/out the inner box.
                    enter = slideInVertically(),
                    exit = slideOutVertically()
                )
                .sizeIn(minWidth = 256.dp, minHeight = 64.dp)
                .background(Color.Red)
        ) {
            // Content of the notification...
        }
    }
}https://github.com/android/snippets/blob/1da1d9d645cd1a8e693981900e04d6bc32287a5c/compose/snippets/src/main/java/com/example/compose/snippets/animations/AnimationSnippets.kt#L221-L248
```

<br />

In some cases, you may want to have `AnimatedVisibility` apply no animations at
all so that children can each have their own distinct animations by
`animateEnterExit`. To achieve this, specify `EnterTransition.None` and
`ExitTransition.None` at the `AnimatedVisibility` composable.

#### Add custom animation

If you want to add custom animation effects beyond the built-in enter and exit
animations, access the underlying `Transition` instance via the `transition`
property inside the content lambda for `AnimatedVisibility`. Any animation
states added to the Transition instance will run simultaneously with the enter
and exit animations of `AnimatedVisibility`. `AnimatedVisibility` waits until
all animations in the `Transition` have finished before removing its content.
For exit animations created independent of `Transition` (such as using
`animate*AsState`), `AnimatedVisibility` would not be able to account for them,
and therefore may remove the content composable before they finish.


```kotlin
var visible by remember { mutableStateOf(true) }

AnimatedVisibility(
    visible = visible,
    enter = fadeIn(),
    exit = fadeOut()
) { // this: AnimatedVisibilityScope
    // Use AnimatedVisibilityScope#transition to add a custom animation
    // to the AnimatedVisibility.
    val background by transition.animateColor(label = "color") { state ->
        if (state == EnterExitState.Visible) Color.Blue else Color.Gray
    }
    Box(
        modifier = Modifier
            .size(128.dp)
            .background(background)
    )
}https://github.com/android/snippets/blob/1da1d9d645cd1a8e693981900e04d6bc32287a5c/compose/snippets/src/main/java/com/example/compose/snippets/animations/AnimationSnippets.kt#L256-L273
```

<br />

See [updateTransition](https://developer.android.com/develop/ui/compose/animation/value-based#updatetransition) for the details about `Transition`.

### Animate based on target state with `AnimatedContent`

The [`AnimatedContent`](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#AnimatedContent(kotlin.Any,androidx.compose.ui.Modifier,kotlin.Function1,androidx.compose.ui.Alignment,kotlin.Function2))
composable animates its content as it changes based on a
target state.


```kotlin
Row {
    var count by remember { mutableIntStateOf(0) }
    Button(onClick = { count++ }) {
        Text("Add")
    }
    AnimatedContent(
        targetState = count,
        label = "animated content"
    ) { targetCount ->
        // Make sure to use `targetCount`, not `count`.
        Text(text = "Count: $targetCount")
    }
}https://github.com/android/snippets/blob/1da1d9d645cd1a8e693981900e04d6bc32287a5c/compose/snippets/src/main/java/com/example/compose/snippets/animations/AnimationSnippets.kt#L298-L310
```

<br />

Note that you should always use the lambda parameter and reflect it to the
content. The API uses this value as the key to identify the content that's
currently shown.

By default, the initial content fades out and then the target content fades in
(this behavior is called [fade through](https://material.io/design/motion/the-motion-system.html#fade-through)). You
can customize this animation behavior by specifying a [`ContentTransform`](https://developer.android.com/reference/kotlin/androidx/compose/animation/ContentTransform) object to the
`transitionSpec` parameter. You can create `ContentTransform` by combining an
[`EnterTransition`](https://developer.android.com/reference/kotlin/androidx/compose/animation/EnterTransition)
with an [`ExitTransition`](https://developer.android.com/reference/kotlin/androidx/compose/animation/ExitTransition)
using the `with` infix function. You can apply [`SizeTransform`](https://developer.android.com/reference/kotlin/androidx/compose/animation/package-summary#SizeTransform(kotlin.Boolean,kotlin.Function2))
to the `ContentTransform` by attaching it with the
`using` infix function.


```kotlin
AnimatedContent(
    targetState = count,
    transitionSpec = {
        // Compare the incoming number with the previous number.
        if (targetState > initialState) {
            // If the target number is larger, it slides up and fades in
            // while the initial (smaller) number slides up and fades out.
            slideInVertically { height -> height } + fadeIn() togetherWith
                slideOutVertically { height -> -height } + fadeOut()
        } else {
            // If the target number is smaller, it slides down and fades in
            // while the initial number slides down and fades out.
            slideInVertically { height -> -height } + fadeIn() togetherWith
                slideOutVertically { height -> height } + fadeOut()
        }.using(
            // Disable clipping since the faded slide-in/out should
            // be displayed out of bounds.
            SizeTransform(clip = false)
        )
    }, label = "animated content"
) { targetCount ->
    Text(text = "$targetCount")
}https://github.com/android/snippets/blob/1da1d9d645cd1a8e693981900e04d6bc32287a5c/compose/snippets/src/main/java/com/example/compose/snippets/animations/AnimationSnippets.kt#L317-L339
```

<br />

![](https://developer.android.com/static/develop/ui/compose/images/animation-count.gif)

`EnterTransition` defines how the target content should appear, and
`ExitTransition` defines how the initial content should disappear. In addition
to all of the `EnterTransition` and `ExitTransition` functions available for
`AnimatedVisibility`, `AnimatedContent` offers [`slideIntoContainer`](https://developer.android.com/reference/kotlin/androidx/compose/animation/AnimatedContentScope#slideIntoContainer(androidx.compose.animation.AnimatedContentScope.SlideDirection,androidx.compose.animation.core.FiniteAnimationSpec,kotlin.Function1))
and [`slideOutOfContainer`](https://developer.android.com/reference/kotlin/androidx/compose/animation/AnimatedContentScope#slideOutOfContainer(androidx.compose.animation.AnimatedContentScope.SlideDirection,androidx.compose.animation.core.FiniteAnimationSpec,kotlin.Function1)).
These are convenient alternatives to `slideInHorizontally/Vertically` and
`slideOutHorizontally/Vertically` that calculate the slide distance based on
the sizes of the initial content and the target content of the
`AnimatedContent` content.

[`SizeTransform`](https://developer.android.com/reference/kotlin/androidx/compose/animation/SizeTransform) defines how the
size should animate between the initial and the target contents. You have
access to both the initial size and the target size when you are creating the
animation. `SizeTransform` also controls whether the content should be clipped
to the component size during animations.


```kotlin
var expanded by remember { mutableStateOf(false) }
Surface(
    color = MaterialTheme.colorScheme.primary,
    onClick = { expanded = !expanded }
) {
    AnimatedContent(
        targetState = expanded,
        transitionSpec = {
            fadeIn(animationSpec = tween(150, 150)) togetherWith
                fadeOut(animationSpec = tween(150)) using
                SizeTransform { initialSize, targetSize ->
                    if (targetState) {
                        keyframes {
                            // Expand horizontally first.
                            IntSize(targetSize.width, initialSize.height) at 150
                            durationMillis = 300
                        }
                    } else {
                        keyframes {
                            // Shrink vertically first.
                            IntSize(initialSize.width, targetSize.height) at 150
                            durationMillis = 300
                        }
                    }
                }
        }, label = "size transform"
    ) { targetExpanded ->
        if (targetExpanded) {
            Expanded()
        } else {
            ContentIcon()
        }
    }
}https://github.com/android/snippets/blob/1da1d9d645cd1a8e693981900e04d6bc32287a5c/compose/snippets/src/main/java/com/example/compose/snippets/animations/AnimationSnippets.kt#L346-L379
```

<br />

![](https://developer.android.com/static/develop/ui/compose/images/animation-sizetransform.gif)

#### Animate child enter and exit transitions

Just like `AnimatedVisibility`, the [`animateEnterExit`](https://developer.android.com/reference/kotlin/androidx/compose/animation/AnimatedVisibilityScope#(androidx.compose.ui.Modifier).animateEnterExit(androidx.compose.animation.EnterTransition,androidx.compose.animation.ExitTransition,kotlin.String))
modifier is available inside the content lambda of `AnimatedContent`. Use this
to apply `EnterAnimation` and `ExitAnimation` to each of the direct or indirect
children separately.

#### Add custom animation

Just like `AnimatedVisibility`, the `transition` field is available inside the
content lambda of `AnimatedContent`. Use this to create a custom animation
effect that runs simultaneously with the `AnimatedContent` transition. See
[updateTransition](https://developer.android.com/develop/ui/compose/animation/value-based#updatetransition) for the details.

### Animate between two layouts with `Crossfade`

`Crossfade` animates between two layouts with a crossfade animation. By toggling
the value passed to the `current` parameter, the content is switched with a
crossfade animation.


```kotlin
var currentPage by remember { mutableStateOf("A") }
Crossfade(targetState = currentPage, label = "cross fade") { screen ->
    when (screen) {
        "A" -> Text("Page A")
        "B" -> Text("Page B")
    }
}https://github.com/android/snippets/blob/1da1d9d645cd1a8e693981900e04d6bc32287a5c/compose/snippets/src/main/java/com/example/compose/snippets/animations/AnimationSnippets.kt#L398-L404
```

<br />

## Built-in animation modifiers

### Animate composable size changes with `animateContentSize`

![Green composable animating its size change smoothly.](https://developer.android.com/static/develop/ui/compose/images/animations/animated_content_size.gif) **Figure 2.** Composable smoothly animating between a small and a larger size

The `animateContentSize` modifier animates a size change.
| **Note:** The ordering of where `animateContentSize` is placed in your modifier chain matters. For smooth animations, ensure you place it *before* any size modifiers such as `size` or `defaultMinSize` to ensure that `animateContentSize` reports the animated value change to the Layout.


```kotlin
var expanded by remember { mutableStateOf(false) }
Box(
    modifier = Modifier
        .background(colorBlue)
        .animateContentSize()
        .height(if (expanded) 400.dp else 200.dp)
        .fillMaxWidth()
        .clickable(
            interactionSource = remember { MutableInteractionSource() },
            indication = null
        ) {
            expanded = !expanded
        }

) {
}https://github.com/android/snippets/blob/1da1d9d645cd1a8e693981900e04d6bc32287a5c/compose/snippets/src/main/java/com/example/compose/snippets/animations/AnimationQuickGuide.kt#L259-L274
```

<br />

## List item animations

If you are looking to animate item reorderings inside a Lazy list or grid, take a look at the
[Lazy layout item animation documentation](https://developer.android.com/develop/ui/compose/lists#item-animations).

## Recommended for you

- Note: link text is displayed when JavaScript is off
- [Value-based animations](https://developer.android.com/develop/ui/compose/animation/value-based)
- [Animations in Compose](https://developer.android.com/develop/ui/compose/animation/introduction)
- [Animation tooling support {:#tooling}](https://developer.android.com/develop/ui/compose/animation/tooling)