Compose Animation

User Guide Code Sample

API Reference
androidx.compose.animation
androidx.compose.animation.core
androidx.compose.animation.graphics
(See the API reference docs for all compose packages)

Build animations in their Jetpack Compose applications to enrich the user experience.

Latest Update	Stable Release	Release Candidate	Beta Release	Alpha Release
December 11, 2024	1.7.6	-	-	1.8.0-alpha07

Structure

Compose is a combination of 7 Maven group IDs within androidx. Each group contains a targeted subset of functionality, each with its own set of release notes.

This table explains the groups and links to each set of release notes.

Group	Description
compose.animation	Build animations in their Jetpack Compose applications to enrich the user experience.
compose.compiler	Transform @Composable functions and enable optimizations with a Kotlin compiler plugin.
compose.foundation	Write Jetpack Compose applications with ready to use building blocks and extend foundation to build your own design system pieces.
compose.material	Build Jetpack Compose UIs with ready to use Material Design Components. This is the higher level entry point of Compose, designed to provide components that match those described at www.material.io.
compose.material3	Build Jetpack Compose UIs with Material Design 3 Components, the next evolution of Material Design. Material 3 includes updated theming and components and Material You personalization features like dynamic color, and is designed to be cohesive with the new Android 12 visual style and system UI.
compose.runtime	Fundamental building blocks of Compose's programming model and state management, and core runtime for the Compose Compiler Plugin to target.
compose.ui	Fundamental components of compose UI needed to interact with the device, including layout, drawing, and input.

Declaring dependencies

To add a dependency on Compose, you must add the Google Maven repository to your project. Read Google's Maven repository for more information.

Add the dependencies for the artifacts you need in the build.gradle file for your app or module:

Groovy

dependencies {
    implementation "androidx.compose.animation:animation:1.7.6"
}

android {
    buildFeatures {
        compose true
    }

    composeOptions {
        kotlinCompilerExtensionVersion = "1.5.15"
    }

    kotlinOptions {
        jvmTarget = "1.8"
    }
}

Kotlin

dependencies {
    implementation("androidx.compose.animation:animation:1.7.6")
}

android {
    buildFeatures {
        compose = true
    }

    composeOptions {
        kotlinCompilerExtensionVersion = "1.5.15"
    }

    kotlinOptions {
        jvmTarget = "1.8"
    }
}

For more information about dependencies, see Add build dependencies.

Feedback

Your feedback helps make Jetpack better. Let us know if you discover new issues or have ideas for improving this library. Please take a look at the existing issues in this library before you create a new one. You can add your vote to an existing issue by clicking the star button.

Create a new issue

See the Issue Tracker documentation for more information.

Version 1.8

Version 1.8.0-alpha07

December 11, 2024

androidx.compose.animation:animation-*:1.8.0-alpha07 is released. Version 1.8.0-alpha07 contains these commits.

New Features

Supports lookahead in Pager, by differentiating the lookahead pass from approach pass for retaining items and consuming scrolling. (b/371802474)

Bug Fixes

Fixes a rare crash where a shared element is composed but never measured/placed, by requiring the shared element to render in place at least once before rendering it in overlay. (b/371802474)

Version 1.8.0-alpha06

November 13, 2024

androidx.compose.animation:animation-*:1.8.0-alpha06 is released. Version 1.8.0-alpha06 contains these commits.

API Changes

Updated sharedElement parameter naming from state to sharedContentState for consistency across shared element APIs. (I5694c, b/375351468)
AnimatedImageVector suite of APIs are now stable. (I7174b, b/261436267)

Version 1.8.0-alpha05

October 30, 2024

androidx.compose.animation:animation-*:1.8.0-alpha05 is released. Version 1.8.0-alpha05 contains these commits.

New Features

Lookahead is now supported in LazyGrid. This includes differentiating lookahead pass versus approach pass in scrolling, item composition/disposal, and item animation, and uses lookahead pass for source of truth for scrolling, and item animation target.

Bug Fixes

Update internal states for AnimatedContent’s size transform when transition is recreated. This ensures the target size information is always up to date. (b/372512085)

Version 1.8.0-alpha04

October 16, 2024

androidx.compose.animation:animation-*:1.8.0-alpha04 is released. Version 1.8.0-alpha04 contains these commits.

Bug Fixes

Fixed a bug causing some easing curves to crash at certain time fractions.
Fixed a bug causing improper alignment for Modifier.animateContentSize under RTL. (Idae6b, b/372055503)

Version 1.8.0-alpha03

October 2, 2024

androidx.compose.animation:animation-*:1.8.0-alpha03 is released. Version 1.8.0-alpha03 contains these commits.

API Changes

Kotlin version update to 1.9 (I1a14c)

Bug Fixes

Fixed an issue in AnimatedContent size animation by always tracking and starting animation from the current size to ensure continuity.

Version 1.8.0-alpha02

September 18, 2024

androidx.compose.animation:animation-*:1.8.0-alpha02 is released. Version 1.8.0-alpha02 contains these commits.

Version 1.8.0-alpha01

September 4, 2024

androidx.compose.animation:animation-*:1.8.0-alpha01 is released. Version 1.8.0-alpha01 contains these commits.

New Features

New Modifier.animateBounds API for animating size and position changes within a lookahead scope. 94b9394

API Changes

Remove experimental flags on Keyframes with Arcs and Splines (89e1199)

Bug Fixes

Skip placeHolderSize logic when no match is found (77c0160)
Clamp play time in AndroidFlingSpline to prevent crashes due to non-monotonically increasing play time(9d47587)
Fix SharedTransitionScope not drawing items in certain conditions (b41077b6)

External Contribution

Prevent setting seekable transition playTime when no transition is running by Steven Schoen. (c2e6e7e6)

Version 1.7

Version 1.7.6

December 11, 2024

androidx.compose.animation:animation-*:1.7.6 is released. Version 1.7.6 contains these commits.

Version 1.7.5

October 30, 2024

androidx.compose.animation:animation-*:1.7.5 is released. Version 1.7.5 contains these commits.

Bug Fixes

Fixed a bug causing improper alignment for Modifier.animateContentSize under RTL. (Idae6b, b/372055503)

Version 1.7.4

October 16, 2024

androidx.compose.animation:animation-*:1.7.4 is released. Version 1.7.4 contains these commits.

Version 1.7.3

October 2, 2024

androidx.compose.animation:animation-*:1.7.3 is released. Version 1.7.3 contains these commits.

Version 1.7.2

September 18, 2024

androidx.compose.animation:animation-*:1.7.2 is released. Version 1.7.2 contains these commits.

External Contribution

Prevent setting seekable transition playTime when no transition is running. Thanks Steven Schoen! (c2e6e7e6)

Version 1.7.1

September 10, 2024

No changes to Android artifacts. -desktop artifacts were removed and -jvmStubs and -linuxx64Stubs artifacts were added. None of these targets are meant to be used, they are placeholders to help Jetbrains Compose efforts.

Version 1.7.0

September 4, 2024

androidx.compose.animation:animation-*:1.7.0 is released.

Important changes since 1.6.0

Important changes in version 1.7.0 are covered in this blogpost.

New Shared Element Transition APIs

New shared element transition APIs await your usage and feedback. These new experimental APIs enable tagging layouts as shared across layout tree using the provided modifiers, producing smoothly changing bounds when one set of shared content exits and the other set enters. (Icb0b9)
New scaleInSharedContentToBounds and scaleOutSharedContentToBounds to scale content in sharedBounds (I731c1)
Experimental SharedTransitionScope is now an interface rather than a class. (Iaf856)
New resizeModes (ScaleToBounds and RemeasureToBounds) for sharedBounds to choose between scaling and remeasure. The previous scaleIn/OutSharedContentToBounds APIs are now deprecated. (I0d41a)

Improvements to existing APIs:

New Modifier.animateContentSize that takes an additional parameter for custom content alignment. (I5623a, b/269803907)
New Experimental DeferredTargetAnimation for animating size, position, or any other target that is unknown during instantiation. (I60745)
SeekableTransitionState replaces snapTo() with seekTo(), and adds a snapTo() that immediately changes the state to a destination state without any kind of animation.
You may now pass a periodicBias value (Float) to keyframesWithSpline, this will make it so that the initial and final velocity of the spline are equal. Useful for repeatable animations using splines. The bias indicates how much each velocity (initial and final) gets modified to achieve periodicity. (Ic1e6c, b/292114811)

The following APIs have become stable or been removed:

AnimatedVisibilityScope.transition is now a stable API. Modifier.animateEnterExit(..) has also been made stable. (I6c1d1)
ApproachLayoutModifierNode and Modifier.approachLayout are now stable, with new isMeasurementApproachInProgress() and isPlacementApproachInProgress() to replace the old isMeasurementApproachComplete() and isPlacementApproachComplete() respectively.
Removed deprecated intermediateLayout modifier. (I3e91c)
LookaheadScope APIs have been made stable. (I21507)

Version 1.7.0-rc01

August 21, 2024

androidx.compose.animation:animation-*:1.7.0-rc01 is released. Version 1.7.0-rc01 contains these commits.

Version 1.7.0-beta07

August 7, 2024

androidx.compose.animation:animation-*:1.7.0-beta07 is released. Version 1.7.0-beta07 contains these commits.

Bug Fixes

Fixed SharedTransitionScope not drawing overlay items during transition in certain conditions, which would typically include usage with Navigation. (Id65ab, b/347520198)

Version 1.7.0-beta06

July 24, 2024

androidx.compose.animation:animation-*:1.7.0-beta06 is released. Version 1.7.0-beta06 contains these commits.

Bug Fixes

Fixed SeekableTransition leaking transition states by properly cleaning up observations from SnapshotStateObserver when the transition is disposed. (b9c7182)
Fixed edge cases where child Transitions are not properly marked complete when the parent completes. (dc42216)

Version 1.7.0-beta05

July 10, 2024

androidx.compose.animation:animation-*:1.7.0-beta05 is released. Version 1.7.0-beta05 contains these commits.

Bug Fixes

The Transition property totalDurationNanos now can be properly read within a snapshotFlow.

Version 1.7.0-beta04

June 26, 2024

androidx.compose.animation:animation-*:1.7.0-beta04 is released. Version 1.7.0-beta04 contains these commits.

Version 1.7.0-beta03

June 12, 2024

androidx.compose.animation:animation-*:1.7.0-beta03 is released. Version 1.7.0-beta03 contains these commits.

Version 1.7.0-beta02

May 29, 2024

androidx.compose.animation:animation-*:1.7.0-beta02 is released. Version 1.7.0-beta02 contains these commits.

Version 1.7.0-beta01

May 14, 2024

androidx.compose.animation:animation-*:1.7.0-beta01 is released. Version 1.7.0-beta01 contains these commits.

API Changes

New resizeModes (ScaleToBounds and RemeasureToBounds) for sharedBounds to choose between scaling and remeasure. The previous scaleIn/OutSharedContentToBounds APIs are now deprecated. (I0d41a)

External Contribution

Experimental SharedTransitionScope is now an interface rather than a class by Steven Schoen. (Iaf856, b/338415048, b/338414702)

Version 1.7.0-alpha08

May 1, 2024

androidx.compose.animation:animation-*:1.7.0-alpha08 is released. Version 1.7.0-alpha08 contains these commits.

API Changes

LookaheadScope APIs have been made stable. (I21507)

External Contribution

Clear start animation time after SeekableTransitionState animates/snaps by Steven Schoen (1ca89529)

Version 1.7.0-alpha07

April 17, 2024

androidx.compose.animation:animation-*:1.7.0-alpha07 is released. Version 1.7.0-alpha07 contains these commits.

New Features

New shared element transition APIs await your usage and feedback. These new experimental APIs enable tagging layouts as shared across layout tree using the provided modifiers, producing smoothly changing bounds when one set of shared content exits and the other set enters. (Icb0b9)
New scaleInSharedContentToBounds and scaleOutSharedContentToBounds to scale content in sharedBounds (I731c1)

API Changes

AnimatedVisibilityScope.transition is now a stable API. Modifier.animateEnterExit(..) has also been made stable. (I6c1d1)
ApproachLayoutModifierNode and Modifier.approachLayout are now stable, with new isMeasurementApproachInProgress() and isPlacementApproachInProgress() to replace the old isMeasurementApproachComplete() and isPlacementApproachComplete() respectively.
Removed deprecated intermediateLayout modifier. (I3e91c)
You may now pass a periodicBias value (Float) to keyframesWithSpline, this will make it so that the initial and final velocity of the spline are equal. Useful for repeatable animations using splines. The bias indicates how much each velocity (initial and final) gets modified to achieve periodicity. (Ic1e6c, b/292114811)

Bug Fixes

Fixed over-shooting and under-shooting easing curves that would previously be clamped to 0..1 (I38747)

Version 1.7.0-alpha06

April 3, 2024

androidx.compose.animation:animation-*:1.7.0-alpha06 is released. Version 1.7.0-alpha06 contains these commits.

New Features

Item appearance and disappearance animation support was added into LazyColumn and LazyRow. Previously it was possible to add Modifier.animateItemPlacement() modifier in order to support placement (reordering) animations. We deprecated this modifier and introduced a new non-experimental modifier called Modifier.animateItem() which allows you to support all three animation types: appearance (fade in), disappearance (fade out) and reordering. (I2d7f7, b/330152398, b/150812265)

Bug Fixes

Improved performance of updateTransition API.

Version 1.7.0-alpha05

March 20, 2024

androidx.compose.animation:animation-*:1.7.0-alpha05 is released. Version 1.7.0-alpha05 contains these commits.

API Changes

SeekableTransitionState replaces snapTo() with seekTo(), and adds a snapTo() that immediately changes the state to a destination state without any kind of animation.

Version 1.7.0-alpha04

March 6, 2024

androidx.compose.animation:animation-*:1.7.0-alpha04 is released. Version 1.7.0-alpha04 contains these commits.

API Changes

New API Path.reverse() to reverse a path's direction (I36348)

Version 1.7.0-alpha03

February 21, 2024

androidx.compose.animation:animation-*:1.7.0-alpha03 is released. Version 1.7.0-alpha03 contains these commits.

New Features

New Modifier.animateContentSize that takes an additional parameter for custom content alignment. (I5623a, b/269803907)
New Experimental DeferredTargetAnimation for animating size, position, or any other target that is unknown during instantiation. (I60745)

Version 1.7.0-alpha02

February 7, 2024

androidx.compose.animation:animation-*:1.7.0-alpha02 is released. Version 1.7.0-alpha02 contains these commits.

Bug Fixes

Compatibility fix for KeyframesSpec. (I2bdf3, b/322214617)
Fixed Modifier.animateContentSize not resetting properly when used in LazyList. (I070512, b/322525716)
Fixed IllegalStateException on KeyframesSpec when using out of range timestamps. (I341b8, b/322839811)

Version 1.7.0-alpha01

January 24, 2024

androidx.compose.animation:animation-*:1.7.0-alpha01 is released. Version 1.7.0-alpha01 contains these commits.

Version 1.6

Version 1.6.8

June 12, 2024

androidx.compose.animation:animation-*:1.6.8 is released. Version 1.6.8 contains these commits.

Version 1.6.7

May 1, 2024

androidx.compose.animation:animation-*:1.6.7 is released. Version 1.6.7 contains these commits.

Version 1.6.6

April 17, 2024

androidx.compose.animation:animation-*:1.6.6 is released. No changes since the previous release

Version 1.6.5

April 3, 2024

androidx.compose.animation:animation-*:1.6.5 is released. Version 1.6.5 contains these commits.

Version 1.6.4

March 20, 2024

androidx.compose.animation:animation-*:1.6.4 is released. Version 1.6.4 contains these commits.

Version 1.6.3

March 6, 2024

androidx.compose.animation:animation-*:1.6.3 is released. Version 1.6.3 contains these commits.

Version 1.6.2

February 21, 2024

androidx.compose.animation:animation-*:1.6.2 is released. Version 1.6.2 contains these commits.

Version 1.6.1

February 7, 2024

androidx.compose.animation:animation-*:1.6.1 is released. Version 1.6.1 contains these commits.

Bug Fixes

Compatibility fix for KeyframesSpec. (I2bdf3, b/322214617)

Version 1.6.0

January 24, 2024

androidx.compose.animation:animation-*:1.6.0 is released. Version 1.6.0 contains these commits.

Version 1.6.0-rc01

January 10, 2024

androidx.compose.animation:animation-*:1.6.0-rc01 is released. Version 1.6.0-rc01 contains these commits.

Version 1.6.0-beta03

December 13, 2023

androidx.compose.animation:animation-*:1.6.0-beta03 is released. Version 1.6.0-beta03 contains these commits.

API Changes

Temporarily removed scaleInToFitContainer and scaleOutToFitContainer from AnimatedContentTransitionScope as they require lookahead. They will be available when lookahead is on by default or opted-in in future releases.

Version 1.6.0-beta02

November 29, 2023

androidx.compose.animation:animation-*:1.6.0-beta02 is released. Version 1.6.0-beta02 contains these commits.

Version 1.6.0-beta01

November 15, 2023

androidx.compose.animation:animation-*:1.6.0-beta01 is released. Version 1.6.0-beta01 contains these commits.

API Changes

ExitTransition.Hold has been renamed to ExitTransition.KeepUntilTransitionsFinished to be more explicit. (I1c490)
You may now use keyframesWithSpline to interpolate any N-dimensional value using monotonic splines. It's particularly useful to interpolate positional values such as Offset, IntOffset, DpOffset. Added as Experimental API.

Bug Fixes

Add renderer support for Sweep Gradient in ArcLine. (I4d5bb)
Implement equals and hashcode for PageSize.Fixed. (Ie3ede, b/300134276)
Fix binary compatibility issue with Window Inset change. (Iee695)
Remove material core layer for Material3 Chip/Button as the microbenchmarks show better performance without it. (I55555)

Version 1.6.0-alpha08

October 18, 2023

androidx.compose.animation:animation-*:1.6.0-alpha08 is released. Version 1.6.0-alpha08 contains these commits.

API Changes

Deprecated KeyframesSpecConfig#with in favor KeyframesSpecConfig#using which preserves the builder pattern. (I1d769)

Version 1.6.0-alpha07

October 4, 2023

androidx.compose.animation:animation-*:1.6.0-alpha07 is released. Version 1.6.0-alpha07 contains these commits.

API Changes

Fixed and Scrollable Tabrows now have Primary and Secondary variants. These correctly map to the color and indicator behavior as defined in Material3.
PrimaryScrollableTabRow and SecondaryScrollableTabRow now expose scroll state. (Iec8f5, b/260572337)

Version 1.6.0-alpha06

September 20, 2023

androidx.compose.animation:animation-*:1.6.0-alpha06 is released. Version 1.6.0-alpha06 contains these commits.

Version 1.6.0-alpha05

September 6, 2023

androidx.compose.animation:animation-*:1.6.0-alpha05 is released. Version 1.6.0-alpha05 contains these commits.

API Changes

Added PathEasing to enable an arbitrary path to be supplied to an easing curve. (Idb4b9)

Version 1.6.0-alpha04

August 23, 2023

androidx.compose.animation:animation-*:1.6.0-alpha04 is released. Version 1.6.0-alpha04 contains these commits.

API Changes

Add SeekableTransitionState to allow developers to control the progress of a transition. (I8e69d)

Version 1.6.0-alpha03

August 9, 2023

androidx.compose.animation:animation-*:1.6.0-alpha03 is released. Version 1.6.0-alpha03 contains these commits.

API Changes

New type of enter/exit transition that scales the content based on the size of the animating container during enter & exit animation. LookaheadScope Composable fun and interface are now stable. (Ifb2ce)

Version 1.6.0-alpha02

July 26, 2023

androidx.compose.animation:animation-*:1.6.0-alpha02 is released. Version 1.6.0-alpha02 contains these commits.

API Changes

New ExitTransition.Hold to display outgoing content in AnimatedContent until both enter & exit transition are finished. (I5984f)
Additional annotations to specify allowed inputs to composables (I51109)

Version 1.6.0-alpha01

June 21, 2023

androidx.compose.animation:animation-*:1.6.0-alpha01 is released. Version 1.6.0-alpha01 contains these commits.

New Features

Enable Modifier.animateContentSize and AnimatedVisibility to be fully integrated into the lookahead system by reporting the target size in the lookahead pass.

API Changes

New property in IntrinsincMeasureScope and its implementations (e.g. MeasureScope) to indicate whether the current measure pass is a lookahead pass. (I7a812)

Bug Fixes

Removed allocations from spring animations. (Ie9431)
value parameter name for Enum.valueOf changed (Ia9b89)
more thrown exceptions from enum valueOf (I818fe)

Version 1.5

Version 1.5.4

October 18, 2023

androidx.compose.animation:animation-*:1.5.4 is released. Version 1.5.4 contains these commits.

Version 1.5.3

October 4, 2023

androidx.compose.animation:animation-*:1.5.3 is released. This version has no changes

Version 1.5.2

September 27, 2023

androidx.compose.animation:animation-*:1.5.2 is released. Version 1.5.2 contains these commits.

Version 1.5.1

September 6, 2023

androidx.compose.foundation:foundation-*:1.5.1 is released. Version 1.5.1 contains these commits.

Bug Fixes

Fixed text fields showing keyboard and being editable when readOnly is true. Also fixed the keyboard not showing when readOnly is changed from true to false while focused. (I34a19, b/246909589)

Version 1.5.1

September 6, 2023

androidx.compose.animation:animation-*:1.5.1 is released. Version 1.5.1 contains these commits.

Version 1.5.0

August 9, 2023

androidx.compose.animation:animation-*:1.5.0 is released. Version 1.5.0 contains these commits.

Version 1.5.0-rc01

July 26, 2023

androidx.compose.animation:animation-*:1.5.0-rc01 is released. Version 1.5.0-rc01 contains these commits.

Bug Fixes

Fixed an issue where calling .value on a primitive state type (like MutableIntState) would report a lint warning with an invalid fix. The inspection will now recommend migrating to the correct property. (Iba953, b/287279257)
An optional inspection to recommend migrating mutableStateOf() calls to their corresponding specialized types for primitives is available. Its lint ID is AutoboxingStateCreation. Previously, this inspection was enabled by default for all projects. To see this warning in Android Studio's editor and your project's lint outputs, change its severity from informational to warning (or higher) by declaring warning "AutoboxingStateCreation" inside your module's build.gradle or build.gradle.kts configuration as shown (I34f7e):
```
    android {
        lint {
            warning "AutoboxingStateCreation"
        }
        ...
    }
```

Version 1.5.0-beta03

June 28, 2023

androidx.compose.animation:animation-*:1.5.0-beta03 is released. Version 1.5.0-beta03 contains these commits.

Version 1.5.0-beta02

June 7, 2023

androidx.compose.animation:animation-*:1.5.0-beta02 is released. Version 1.5.0-beta02 contains these commits.

Version 1.5.0-beta01

May 24, 2023

androidx.compose.animation:animation-*:1.5.0-beta01 is released. Version 1.5.0-beta01 contains these commits.

API Changes

Removed allocations in recomposition, color animations, and AndroidComposeView (Ib2bfa)

Bug Fixes

Removed allocations from spring animations (Ie9431)

Version 1.5.0-alpha04

May 10, 2023

androidx.compose.animation:animation-*:1.5.0-alpha04 is released. Version 1.5.0-alpha04 contains these commits.

API Changes

ContentKey is now supported in AnimatedContent to allow more control for when transition should happen. (Ic069b)

Version 1.5.0-alpha03

April 19, 2023

androidx.compose.animation:animation-*:1.5.0-alpha03 is released. Version 1.5.0-alpha03 contains these commits.

New Features

New default behavior for SubcomposeLayout in LookaheadScope. It allows SubcomposeLayouts that don’t have conditional slots (e.g. TabRow, Scaffold, BoxWithConstraints, etc) to work nicely with lookahead animations.

API Changes

New default intermediateMeasurePolicy that reuses measure policy from lookahead pass allows SubcomposeLayout subtypes without conditional slots such as Scaffold, TabRow, and BoxWithConstraints to work with lookahead by default. (Id84c8)
Rename infix fun with to togetherWith for combining enter and exit transitions. New AnimatedContentScope as receiver for the content lambda. (Ic39ae)

Version 1.5.0-alpha02

April 5, 2023

androidx.compose.animation:animation-*:1.5.0-alpha02 is released. Version 1.5.0-alpha02 contains these commits.

New Features

New experimental API to support lookahead in SubcomposeLayout. This will allow SubcomposeLayout to function properly in a LookaheadScope. More out-of-the-box support for specific subtypes of SubcomposeLayout will come soon.

API Changes

New SubcomposeLayout API that takes an additional intermediate measure policy for handling measure/layout logic during lookahead-based animations. (I017d3)

Version 1.5.0-alpha01

March 22, 2023

androidx.compose.animation:animation-*:1.5.0-alpha01 is released. Version 1.5.0-alpha01 contains these commits.

API Changes

AnimatedContent APIs are now stable AnimatedContentScope has been renamed to AnimatedContentTransitionScope. scaleIn and scaleOut are now stable APIs. (Iaf54e)

Version 1.4

Version 1.4.3

May 3, 2023

androidx.compose.animation:animation:1.4.3, androidx.compose.animation:animation-core:1.4.3, and androidx.compose.animation:animation-graphics:1.4.3 are released with no changes (only a version bump).

Version 1.4.2

April 19, 2023

androidx.compose.animation:animation:1.4.2, androidx.compose.animation:animation-core:1.4.2, and androidx.compose.animation:animation-graphics:1.4.2 are released with no changes. Version 1.4.2 contains these commits.

Version 1.4.1

April 5, 2023

androidx.compose.animation:animation:1.4.1, androidx.compose.animation:animation-core:1.4.1, and androidx.compose.animation:animation-graphics:1.4.1 are released with no changes. Version 1.4.1 contains these commits.

Version 1.4.0

March 22, 2023

androidx.compose.animation:animation:1.4.0, androidx.compose.animation:animation-core:1.4.0, and androidx.compose.animation:animation-graphics:1.4.0 are released. Version 1.4.0 contains these commits.

Important changes since 1.3.0

Tooling label is supported in rememberInfiniteTransition and all the extension functions on InfiniteTransition and Transition (e.g. InfiniteTransition#animateColor) (I56ef7)

Version 1.4.0-rc01

March 8, 2023

androidx.compose.animation:animation:1.4.0-rc01, androidx.compose.animation:animation-core:1.4.0-rc01, and androidx.compose.animation:animation-graphics:1.4.0-rc01 are released with no changes. Version 1.4.0-rc01 contains these commits.

Version 1.4.0-beta02

February 22, 2023

androidx.compose.animation:animation:1.4.0-beta02, androidx.compose.animation:animation-core:1.4.0-beta02, and androidx.compose.animation:animation-graphics:1.4.0-beta02 are released with no changes. Version 1.4.0-beta02 contains these commits.

Version 1.4.0-beta01

February 8, 2023

androidx.compose.animation:animation:1.4.0-beta01, androidx.compose.animation:animation-core:1.4.0-beta01, and androidx.compose.animation:animation-graphics:1.4.0-beta01 are released with no changes. Version 1.4.0-beta01 contains these commits.

Version 1.4.0-alpha05

January 25, 2023

androidx.compose.animation:animation:1.4.0-alpha05, androidx.compose.animation:animation-core:1.4.0-alpha05, and androidx.compose.animation:animation-graphics:1.4.0-alpha05 are released. Version 1.4.0-alpha05 contains these commits.

Changes

No changes in animation libraries since the last alpha, version bump only

Version 1.4.0-alpha04

January 11, 2023

androidx.compose.animation:animation:1.4.0-alpha04, androidx.compose.animation:animation-core:1.4.0-alpha04, and androidx.compose.animation:animation-graphics:1.4.0-alpha04 are released. Version 1.4.0-alpha04 contains these commits.

New Features

Tooling label is supported in rememberInfiniteTransition and all the extension functions on InfiniteTransition and Transition (e.g. InfiniteTransition#animateColor) (I56ef7)

API Changes

InfiniteTransition#TransitionAnimationState and InfiniteTransition#animations APIs are now public. (I36682)

Version 1.4.0-alpha03

December 7, 2022

androidx.compose.animation:animation:1.4.0-alpha03, androidx.compose.animation:animation-core:1.4.0-alpha03, and androidx.compose.animation:animation-graphics:1.4.0-alpha03 are released. Version 1.4.0-alpha03 contains these commits.

API Changes

In UI tests using a Compose rule, continuations resumed during withFrameNanos callbacks will not be dispatched until after all frame callbacks have finished running. This matches the behavior of compose when running normally. However, tests that rely on the old behavior may fail. This should only affect code that calls withFrameNanos or withFrameMillis directly, and has logic outside of callback passed to those functions that may need to be moved inside the callbacks. See the animation test changes in this CL for examples.
Added optional onPerformTraversals: (Long) -> Unit parameter to TestMonotonicFrameClock constructor and factory function to run code after withFrameNanos callbacks but before resuming callers' coroutines. (Idb413, b/254115946, b/222093277, b/255802670)
New param in AnimatedContent for tooling label (Iebe2d)

Version 1.4.0-alpha02

November 9, 2022

androidx.compose.animation:animation:1.4.0-alpha02, androidx.compose.animation:animation-core:1.4.0-alpha02, and androidx.compose.animation:animation-graphics:1.4.0-alpha02 are released. Version 1.4.0-alpha02 contains these commits.

API Changes

Add ToolingState to allow tooling to change internal states of Composable (Ie6614)

Version 1.4.0-alpha01

October 24, 2022

androidx.compose.animation:animation:1.4.0-alpha01, androidx.compose.animation:animation-core:1.4.0-alpha01, and androidx.compose.animation:animation-graphics:1.4.0-alpha01 are released. Version 1.4.0-alpha01 contains these commits.

Bug Fixes

Fix incorrect interruption animation in AnimatedContent (b/238662479)

Version 1.3

Version 1.3.3

January 11, 2023

androidx.compose.animation:animation:1.3.3, androidx.compose.animation:animation-core:1.3.3, and androidx.compose.animation:animation-graphics:1.3.3 are released. Version 1.3.3 contains these commits.

No changes since the 1.3.2.

Version 1.3.2

December 7, 2022

androidx.compose.animation:animation:1.3.2, androidx.compose.animation:animation-core:1.3.2, and androidx.compose.animation:animation-graphics:1.3.2 are released. Version 1.3.2 contains these commits.

Bug Fixes

Updated to support androidx.compose.ui 1.3.2

Version 1.3.1

November 9, 2022

androidx.compose.animation:animation:1.3.1, androidx.compose.animation:animation-core:1.3.1, and androidx.compose.animation:animation-graphics:1.3.1 are released. Version 1.3.1 contains these commits.

Version 1.3.0

October 24, 2022

androidx.compose.animation:animation:1.3.0, androidx.compose.animation:animation-core:1.3.0, and androidx.compose.animation:animation-graphics:1.3.0 are released. Version 1.3.0 contains these commits.

Important changes since 1.2.0

New set of easing functions are made stable

Version 1.3.0-rc01

October 5, 2022

androidx.compose.animation:animation:1.3.0-rc01, androidx.compose.animation:animation-core:1.3.0-rc01, and androidx.compose.animation:animation-graphics:1.3.0-rc01 are released. Version 1.3.0-rc01 contains these commits.

Version 1.3.0-beta03

September 21, 2022

androidx.compose.animation:animation:1.3.0-beta03, androidx.compose.animation:animation-core:1.3.0-beta03, and androidx.compose.animation:animation-graphics:1.3.0-beta03 are released. Version 1.3.0-beta03 contains these commits.

No changes since 1.3.0-beta02.

Version 1.3.0-beta02

September 7, 2022

androidx.compose.animation:animation:1.3.0-beta02, androidx.compose.animation:animation-core:1.3.0-beta02, and androidx.compose.animation:animation-graphics:1.3.0-beta02 are released. Version 1.3.0-beta02 contains these commits.

Removed Kotlin.experimental from the compiler options since it is depricated

Version 1.3.0-beta01

August 24, 2022

androidx.compose.animation:animation:1.3.0-beta01, androidx.compose.animation:animation-core:1.3.0-beta01, and androidx.compose.animation:animation-graphics:1.3.0-beta01 are released. Version 1.3.0-beta01 contains these commits.

Version 1.3.0-alpha03

August 10, 2022

androidx.compose.animation:animation:1.3.0-alpha03, androidx.compose.animation:animation-core:1.3.0-alpha03, and androidx.compose.animation:animation-graphics:1.3.0-alpha03 are released. Version 1.3.0-alpha03 contains these commits.

API Changes

New param in Crossfade, animateAsState and Animatable for tooling label (Iac08a)
Added atFraction function for defining keyframes at a fraction instead of at a specific duration. (I20c76, b/232059455)

Version 1.3.0-alpha02

July 27, 2022

androidx.compose.animation:animation:1.3.0-alpha02, androidx.compose.animation:animation-core:1.3.0-alpha02, and androidx.compose.animation:animation-graphics:1.3.0-alpha02 are released. Version 1.3.0-alpha02 contains these commits.

Version 1.3.0-alpha01

June 29, 2022

androidx.compose.animation:animation:1.3.0-alpha01, androidx.compose.animation:animation-core:1.3.0-alpha01, and androidx.compose.animation:animation-graphics:1.3.0-alpha01 are released. Version 1.3.0-alpha01 contains these commits.

API Changes

New LookaheadLayout that supports a lookahead pass before the actual measure/layout. This allows a pre-calculation of the layout when it changes, while permitting the post-lookahead measure/layout to use the pre-calculated size/position to animate the size and positions towards the target. SubcomposeLayouts are not yet supported, but will be in an upcoming release. (I477f5)

Version 1.2

Version 1.2.1

August 10, 2022

androidx.compose.animation:animation:1.2.1, androidx.compose.animation:animation-core:1.2.1, and androidx.compose.animation:animation-graphics:1.2.1 are released. Version 1.2.1 contains these commits.

Version 1.2.0

July 27, 2022

androidx.compose.animation:animation:1.2.0, androidx.compose.animation:animation-core:1.2.0, and androidx.compose.animation:animation-graphics:1.2.0 are released. Version 1.2.0 contains these commits.

Important changes since 1.1.0

Compose animation now supports 'Animator duration scale' setting from Developer Options.
A large selection of new experimental easing curves.
AnimatedImageVector now supports repeatCount and repeatMode

Version 1.2.0-rc03

June 29, 2022

androidx.compose.animation:animation:1.2.0-rc03, androidx.compose.animation:animation-core:1.2.0-rc03, and androidx.compose.animation:animation-graphics:1.2.0-rc03 are released. Version 1.2.0-rc03 contains these commits.

No changes since 1.2.0-rc02.

Version 1.2.0-rc02

June 22, 2022

androidx.compose.animation:animation:1.2.0-rc02, androidx.compose.animation:animation-core:1.2.0-rc02, and androidx.compose.animation:animation-graphics:1.2.0-rc02 are released. Version 1.2.0-rc02 contains these commits.

Bug Fixes

Removed ExperimentalEasingApi annotation on Easing functions (Ied441)

Version 1.2.0-rc01

June 15, 2022

androidx.compose.animation:animation:1.2.0-rc01, androidx.compose.animation:animation-core:1.2.0-rc01, and androidx.compose.animation:animation-graphics:1.2.0-rc01 are released. Version 1.2.0-rc01 contains these commits.

API Changes

Interfaces in compose libraries are now built using jdk8 default interface methods (I5bcf1)

Version 1.2.0-beta03

June 1, 2022

androidx.compose.animation:animation:1.2.0-beta03, androidx.compose.animation:animation-core:1.2.0-beta03, and androidx.compose.animation:animation-graphics:1.2.0-beta03 are released. Version 1.2.0-beta03 contains these commits.

API Changes

Added Experimental Easing Curves for Animations (I64a38)

Version 1.2.0-beta02

May 18, 2022

androidx.compose.animation:animation:1.2.0-beta02, androidx.compose.animation:animation-core:1.2.0-beta02, and androidx.compose.animation:animation-graphics:1.2.0-beta02 are released. Version 1.2.0-beta02 contains these commits.

Version 1.2.0-beta01

May 11, 2022

androidx.compose.animation:animation:1.2.0-beta01, androidx.compose.animation:animation-core:1.2.0-beta01, and androidx.compose.animation:animation-graphics:1.2.0-beta01 are released. Version 1.2.0-beta01 contains these commits.

This is the first beta release of 1.2! There are no changes since the last alpha.

Version 1.2.0-alpha08

April 20, 2022

androidx.compose.animation:animation:1.2.0-alpha08, androidx.compose.animation:animation-core:1.2.0-alpha08, and androidx.compose.animation:animation-graphics:1.2.0-alpha08 are released. Version 1.2.0-alpha08 contains these commits.

Version 1.2.0-alpha07

April 6, 2022

androidx.compose.animation:animation:1.2.0-alpha07, androidx.compose.animation:animation-core:1.2.0-alpha07, and androidx.compose.animation:animation-graphics:1.2.0-alpha07 are released. Version 1.2.0-alpha07 contains these commits.

API Changes

AnimatedImageVector now supports repeatCount and repeatMode (Ia3e75, b/199304067)

Version 1.2.0-alpha06

March 23, 2022

androidx.compose.animation:animation:1.2.0-alpha06, androidx.compose.animation:animation-core:1.2.0-alpha06, and androidx.compose.animation:animation-graphics:1.2.0-alpha06 are released. Version 1.2.0-alpha06 contains these commits.

API Changes

Updated parsing of vector drawables to support auto mirroring to flip the content of a VectorPainter if the current layout direction is RTL. (I79cd9, b/185760237)

Bug Fixes

Updated Vector graphics APIs to use the proper composable annotation @VectorComposable instead of @UiComposable (I942bc)

Version 1.2.0-alpha05

March 9, 2022

androidx.compose.animation:animation:1.2.0-alpha05, androidx.compose.animation:animation-core:1.2.0-alpha05, and androidx.compose.animation:animation-graphics:1.2.0-alpha05 are released. Version 1.2.0-alpha05 contains these commits.

API Changes

Hooray! Compose animation now supports 'Animator duration scale' setting from Developer Options. (I5a4fc, b/161675988)

Version 1.2.0-alpha04

February 23, 2022

androidx.compose.animation:animation:1.2.0-alpha04, androidx.compose.animation:animation-core:1.2.0-alpha04, and androidx.compose.animation:animation-graphics:1.2.0-alpha04 are released. Version 1.2.0-alpha04 contains these commits.

Version 1.2.0-alpha03

February 9, 2022

androidx.compose.animation:animation:1.2.0-alpha03, androidx.compose.animation:animation-core:1.2.0-alpha03, and androidx.compose.animation:animation-graphics:1.2.0-alpha03 are released. Version 1.2.0-alpha03 contains these commits.

Version 1.2.0-alpha02

January 26, 2022

androidx.compose.animation:animation:1.2.0-alpha02, androidx.compose.animation:animation-core:1.2.0-alpha02, and androidx.compose.animation:animation-graphics:1.2.0-alpha02 are released. Version 1.2.0-alpha02 contains these commits.

Version 1.2.0-alpha01

January 12, 2022

androidx.compose.animation:animation:1.2.0-alpha01, androidx.compose.animation:animation-core:1.2.0-alpha01, and androidx.compose.animation:animation-graphics:1.2.0-alpha01 are released. Version 1.2.0-alpha01 contains these commits.

API Changes

Use AnimatedImageVector.animatedVectorResource instead of animatedVectorResource to load an <animated-vector> resource file.
- Use rememberAnimatedVectorResource instead of AnimatedImageVector#painterFor to render an AnimatedImageVector. (I9c300)

Bug Fixes

Add toString methods to Animatable and AnimationResult. (Icd3a6)

Dependency Updates

Now depends on Kotlin 1.6.10.

Version 1.1

Version 1.1.1

February 23, 2022

androidx.compose.animation:animation:1.1.1, androidx.compose.animation:animation-core:1.1.1, and androidx.compose.animation:animation-graphics:1.1.1 are released. Version 1.1.1 contains these commits.

Bug Fixes

Fix NullPointerException at androidx.compose.ui.platform.RenderNodeLayer.updateDisplayList (aosp/1947059, b/206677462)
Fix crash caused by clipboard content while reading from clipboard on Android. (I06020, b/197769306)
Fixed RTL in LazyVerticalGrid (aosp/1931080, b/207510535)

Version 1.1.0

February 9, 2022

androidx.compose.animation:animation:1.1.0, androidx.compose.animation:animation-core:1.1.0, and androidx.compose.animation:animation-graphics:1.1.0 are released. Version 1.1.0 contains these commits.

Important changes since 1.0.0

Stable support for the Android 12 Overscroll effect
Improvements to touch target sizing
Note that, with respect to Compose 1.0, Material components will expand their layout space to meet Material accessibility guidelines for touch target size. For instance, Button touch target will expand to a minimum size of 48x48dp, even if you set the Button's size to be smaller. This aligns Compose Material to the same behavior of Material Design Components, providing consistent behavior if you mix Views and Compose. This change also ensures that when you create your UI using Compose Material components, minimum requirements for touch target accessibility will be met.
Stable support for Navigation Rail
Graduates a number of previously experimental APIs to stable
Support for newer versions of Kotlin

Version 1.1.0-rc03

January 26, 2022

androidx.compose.animation:animation:1.1.0-rc03, androidx.compose.animation:animation-core:1.1.0-rc03, and androidx.compose.animation:animation-graphics:1.1.0-rc03 are released. Version 1.1.0-rc03 contains these commits.

Bug Fixes

Updated to support Compose Material 1.1.0-rc03

Version 1.1.0-rc01

December 15, 2021

androidx.compose.animation:animation:1.1.0-rc01 and androidx.compose.animation:animation-core:1.1.0-rc01 are released. Version 1.1.0-rc01 contains these commits.

API Changes

Use AnimatedImageVector.animatedVectorResource instead of animatedVectorResource to load an <animated-vector> resource file.
- Use rememberAnimatedVectorResource instead of AnimatedImageVector#painterFor to render an AnimatedImageVector. (I9c300)

Version 1.1.0-beta04

December 1, 2021

androidx.compose.animation:animation:1.1.0-beta04, androidx.compose.animation:animation-core:1.1.0-beta04, and androidx.compose.animation:animation-graphics:1.1.0-beta04 are released. Version 1.1.0-beta04 contains these commits.

New Features

Updated to be compatible with Kotlin 1.6.0

Version 1.1.0-beta03

November 17, 2021

androidx.compose.animation:animation:1.1.0-beta03, androidx.compose.animation:animation-core:1.1.0-beta03, and androidx.compose.animation:animation-graphics:1.1.0-beta03 are released. Version 1.1.0-beta03 contains these commits.

API Changes

Added new modifier Modifier.onPlaced to allow placement change to be observed. Additional changes to child modifier's offset can therefore be made based on the observed placement change. (I558fd)
New support for contentKey in Crossfade. ContentKey will be used for equality check by animation system. Therefore custom diffing on states can be achieved via specifying appropriate contentKey for different states.

ContentKey will also be used as the key for save & restore content. (I2e055, b/197907070)

Version 1.1.0-beta02

November 3, 2021

androidx.compose.animation:animation:1.1.0-beta02, androidx.compose.animation:animation-core:1.1.0-beta02, and androidx.compose.animation:animation-graphics:1.1.0-beta02 are released. Version 1.1.0-beta02 contains these commits.

Bug Fixes

New animation APIs for supporting tooling. Specifically, they allow tooling to inspect the animations & their configurations in a Transitions. (I4116e)

Version 1.1.0-beta01

October 27, 2021

androidx.compose.animation:animation:1.1.0-beta01, androidx.compose.animation:animation-core:1.1.0-beta01, and androidx.compose.animation:animation-graphics:1.1.0-beta01 are released. Version 1.1.0-beta01 contains these commits.

API Changes

New animation APIs for supporting tooling. Specifically, they allow tooling to inspect the animations & their configurations in a Transitions. (I4116e)

Version 1.1.0-alpha06

October 13, 2021

androidx.compose.animation:animation:1.1.0-alpha06, androidx.compose.animation:animation-core:1.1.0-alpha06, and androidx.compose.animation:animation-graphics:1.1.0-alpha06 are released. Version 1.1.0-alpha06 contains these commits.

Version 1.1.0-alpha05

September 29, 2021

androidx.compose.animation:animation:1.1.0-alpha05, androidx.compose.animation:animation-core:1.1.0-alpha05, and androidx.compose.animation:animation-graphics:1.1.0-alpha05 are released. Version 1.1.0-alpha05 contains these commits.

API Changes

EnterTransition, ExitTransition, and some of the AnimatedVisibility APIs have been made stable. MutableTransitionState.isIdle is also no longer experimental. (I5072d)
Breaking change: lambdas in Enter/ExitTransition factories have been moved to the last position in the param list. (I5072d)

Version 1.1.0-alpha04

September 15, 2021

androidx.compose.animation:animation:1.1.0-alpha04, androidx.compose.animation:animation-core:1.1.0-alpha04, and androidx.compose.animation:animation-graphics:1.1.0-alpha04 are released. Version 1.1.0-alpha04 contains these commits.

Version 1.1.0-alpha03

September 1, 2021

androidx.compose.animation:animation:1.1.0-alpha03, androidx.compose.animation:animation-core:1.1.0-alpha03, and androidx.compose.animation:animation-graphics:1.1.0-alpha03 are released. Version 1.1.0-alpha03 contains these commits.

New Features

Updated Compose 1.1.0-alpha03 to depend on Kotlin 1.5.30. (I74545)

Version 1.1.0-alpha02

August 18, 2021

androidx.compose.animation:animation:1.1.0-alpha02, androidx.compose.animation:animation-core:1.1.0-alpha02, and androidx.compose.animation:animation-graphics:1.1.0-alpha02 are released. Version 1.1.0-alpha02 contains these commits.

API Changes

StartOffset is now supported in repeatable and infiniteRepeatable, as a way to delay the start time or fast forward the animation before the animation starts. This start offset will not be repeated (Ic679f, b/195079908)
New Enter/Exit transition for scale. It can be used in combination with other types of Enter/ExitTransitions. (I372da, b/191325593)

Version 1.1.0-alpha01

August 4, 2021

androidx.compose.animation:animation:1.1.0-alpha01, androidx.compose.animation:animation-core:1.1.0-alpha01, and androidx.compose.animation:animation-graphics:1.1.0-alpha01 are released. Version 1.1.0-alpha01 contains these commits.

API Changes

AnimatedImageVector and the related APIs are now in the new androidx.compose.animation:animation-graphics module. (I60873)

Bug Fixes

Moved InfiniteAnimationPolicy to :compose:ui (I5eb09, b/160602714)

Version 1.0

Version 1.0.5

November 3, 2021

androidx.compose.animation:animation:1.0.5 and androidx.compose.animation:animation-core:1.0.5 are released. Version 1.0.5 contains these commits.

Bug Fixes

Fixed a crash tracking derivedStateOf instances. (aosp/1792247)

Version 1.0.4

October 13, 2021

androidx.compose.animation:animation:1.0.4 and androidx.compose.animation:animation-core:1.0.4 are released. Version 1.0.4 contains these commits.

Dependency Updates

Updated to depend on Kotlin 1.5.31

Version 1.0.3

September 29, 2021

androidx.compose.animation:animation:1.0.3 and androidx.compose.animation:animation-core:1.0.3 are released. Version 1.0.3 contains these commits.

Dependency Updates

Updated to depend on Kotlin 1.5.30

Version 1.0.2

September 1, 2021

androidx.compose.animation:animation:1.0.2 and androidx.compose.animation:animation-core:1.0.2 are released. Version 1.0.2 contains these commits.

Updated to support the Compose 1.0.2 release. Compose 1.0.2 is still compatible with Kotlin 1.5.21.

Version 1.0.1

August 4, 2021

androidx.compose.animation:animation:1.0.1 and androidx.compose.animation:animation-core:1.0.1 are released. Version 1.0.1 contains these commits.

Dependency Updates

Updated to depend on Kotlin 1.5.21.

Version 1.0.0

July 28, 2021

androidx.compose.animation:animation:1.0.0 and androidx.compose.animation:animation-core:1.0.0 are released. Version 1.0.0 contains these commits.

Major features of 1.0.0

This is the first stable release of Compose. Please see the official Compose Release blog for more details!

Known Issues

If you are using Android Studio Bumblebee Canary 4 or AGP 7.1.0-alpha04/7.1.0-alpha05, you may hit the following crash:
```
  java.lang.AbstractMethodError: abstract method "void androidx.lifecycle.DefaultLifecycleObserver.onCreate(androidx.lifecycle.LifecycleOwner)"
```
To fix, temporarily increase your minSdkVersion to 24+ in your build.gradle file. This issue will be fixed in the next version of Android Studio Bumblebee and AGP 7.1. (b/194289155)

Version 1.0.0-rc02

July 14, 2021

androidx.compose.animation:animation:1.0.0-rc02 and androidx.compose.animation:animation-core:1.0.0-rc02 are released. Version 1.0.0-rc02 contains these commits.

Version 1.0.0-rc01

July 1, 2021

androidx.compose.animation:animation:1.0.0-rc01 and androidx.compose.animation:animation-core:1.0.0-rc01 are released. Version 1.0.0-rc01 contains these commits.

Bug Fixes

Moved InfiniteAnimationPolicy to androidx.compose.ui:ui (I5eb09, b/160602714)

Version 1.0.0-beta09

June 16, 2021

androidx.compose.animation:animation:1.0.0-beta09 and androidx.compose.animation:animation-core:1.0.0-beta09 are released. Version 1.0.0-beta09 contains these commits.

API Changes

New AnimatedContent Composable. It manages its content change using customizable ContentTransform as new target content enters and initial content leaves. Different combination of enter and exit transitions can be used to produce a customized look and feel. As a part of the content transform, AnimatedContent automatically animates its size to match the incoming content. (I2c3df)
Removed ManualFrameClock. If you need to control animations, use composeTestRule.mainClock instead. (I3c3e8, b/189951065)

Added Profile Rules

This release adds profile rules to the following compose modules (I14ed6):

androidx.compose.animation
androidx.compose.animation-core
androidx.compose.foundation
androidx.compose.foundation-layout
androidx.compose.material
androidx.compose.material-ripple
androidx.compose.runtime
androidx.compose.ui
androidx.compose.ui.geometry
androidx.compose.ui.graphics
androidx.compose.ui.text
androidx.compose.ui.text
androidx.compose.ui.unit
androidx.compose.ui.util

What are profile rules?

Profile rules for a library are specified in a text file baseline-prof.txt located in the src/main or equivalent directory. The file specifies a rule per line, where a rule in this case is a pattern for matching to methods or classes in the library. The syntax for these rules is a superset of the human-readable ART profile format that is used when using adb shell profman --dump-classes-and-methods .... These rules take one of two forms to target either methods or classes.

A method rule will have the following pattern:

<FLAGS><CLASS_DESCRIPTOR>-><METHOD_SIGNATURE>

And a class rule will have the following pattern:
```
<CLASS_DESCRIPTOR>
```
Here <FLAGS> is one or more of the characters H, S, and P to indicate whether or not this method should be flagged as "Hot", "Startup", or "Post Startup".
The <CLASS_DESCRIPTOR> is the descriptor for the class that the targeted method belongs to. For example, the class androidx.compose.runtime.SlotTable would have a descriptor of Landroidx/compose/runtime/SlotTable;.
The <METHOD_SIGNATURE> is the signature of the method, and includes the name, parameter types, and return types of the method. For example, the method fun isPlaced(): Boolean on LayoutNode has the signature isPlaced()Z.
These patterns can have wildcards (**, *, and ?) in order to have a single rule encompass multiple methods or classes.

What do the rules do?

A method that has the flag H indicates that this method is a "hot" method, and should be compiled ahead of time.
A method that has the flag S indicates that it is a method which is called at startup, and should be compiled ahead of time to avoid the cost of compilation and interpreting the method at startup time.
A method that has the flag P indicates that it is a method which is called after startup.
A class that is present in this file indicates that it is used during startup and should be pre-allocated in the heap to avoid the cost of class loading.

How does this work?

Libraries can define these rules which will be packaged in AAR artifacts. When an app is then built which includes these artifacts, these rules are merged together and the merged rules are used to build a compact binary ART profile that is specific to the app. ART can then leverage this profile when the app is installed on devices in order to ahead-of-time compile a specific subset of the application to improve the performance of the application, especially the first run. Note that this will have no effect on debuggable applications.

Version 1.0.0-beta08

June 2, 2021

androidx.compose.animation:animation:1.0.0-beta08 and androidx.compose.animation:animation-core:1.0.0-beta08 are released. Version 1.0.0-beta08 contains these commits.

Bug Fixes

Now detectDragGesures, detectVerticalGestures, and detectHorizontalGestures will consume the position change automatically, no need to call change.consumePositionChange in the onDrag callbacks (I42fc4, b/185096350, b/187320697)
Modifier.onGloballyPositioned() was changed to report the coordinates of this modifier in the modifier chain, not the layout coordinates after applying all the modifiers. This means that now the ordering of modifiers is affecting what coordinates would be reported. (Ieb67d, b/177926591)

Version 1.0.0-beta07

May 18, 2021

androidx.compose.animation:animation:1.0.0-beta07 and androidx.compose.animation:animation-core:1.0.0-beta07 are released. Version 1.0.0-beta07 contains these commits.

API Changes

New AnimatedVisibility API that support visibility to be specified in a MutableTransitionState. This also allows the animation states to be observed external to AnimatedVisibility via currentState and isIdle.
- New child transition support in Transition
- Support custom exit/enter transition animation in AnimatedVisibility using AnimationScope.transition
- New animateEnterExit modifier accessible for all children of AnimatedVisibility
- Deprecated the AnimatedVisibility APIs that take an initiallyVisible parameter (I702f3)

Version 1.0.0-beta06

May 5, 2021

androidx.compose.animation:animation:1.0.0-beta06 and androidx.compose.animation:animation-core:1.0.0-beta06 are released. Version 1.0.0-beta06 contains these commits.

Version 1.0.0-beta05

April 21, 2021

androidx.compose.animation:animation:1.0.0-beta05 and androidx.compose.animation:animation-core:1.0.0-beta05 are released. Version 1.0.0-beta05 contains these commits.

Bug Fixes

The AndroidManifest files from ui-test-manifest and ui-tooling-data are now compatible with Android 12 (I6f9de, b/184718994)

Version 1.0.0-beta04

April 7, 2021

androidx.compose.animation:animation:1.0.0-beta04 and androidx.compose.animation:animation-core:1.0.0-beta04 are released. Version 1.0.0-beta04 contains these commits.

API Changes

Public instances of RowScope, ColumnScope, BoxScope, BoxWithConstraintsScope were removed. (I4e83e, b/181869067)

Version 1.0.0-beta03

March 24, 2021

androidx.compose.animation:animation:1.0.0-beta03 and androidx.compose.animation:animation-core:1.0.0-beta03 are released. Version 1.0.0-beta03 contains these commits.

Version 1.0.0-beta02

March 10, 2021

androidx.compose.animation:animation:1.0.0-beta02 and androidx.compose.animation:animation-core:1.0.0-beta02 are released. Version 1.0.0-beta02 contains these commits.

Bug Fixes

Enforce restrictions on public usage of experimental APIs (I6aa29, b/174531520)

Version 1.0.0-beta01

February 24, 2021

androidx.compose.animation:animation:1.0.0-beta01 and androidx.compose.animation:animation-core:1.0.0-beta01 are released. Version 1.0.0-beta01 contains these commits.

This is the first release of Compose 1.0.0 Beta.

API Changes

InteractionState has been replaced with [Mutable]InteractionSource
- Interfaces are responsible for emitting / collecting Interaction events.
- Instead of passing interactionState = remember { InteractionState() } to components such as Button and Modifier.clickable(), use interactionSource = remember { MutableInteractionSource() }.
- Instead of: Interaction.Pressed in interactionState you should instead use the extension functions on InteractionSource, such as InteractionSource.collectIsPressedAsState().
- For complex use cases you can use InteractionSource.interactions to observe the stream of Interactions. See the InteractionSource documentation and samples for more information.
- (I85965, b/152525426, b/171913923, b/171710801, b/174852378)
smoothScrollBy and scrollBy methods' packages changed to androidx.compose.foundation.gestures.* (I3f7c1, b/175294473)
Size modifiers were renamed. Modifier.width/height/size were renamed to requiredWidth/requiredHeight/requiredSize. Modifier.preferredWidth/preferredHeight/preferredSize were renamed to width/height/size. (I5b414)
Orientation has been moved to foundation package. VelocirtTracker moved from ui.gesture to ui.input.pointer. (Iff4a8, b/175294473)
AnimationClockObservable and subclasses have been removed. AnimatedFloat has been removed. (Icde52, b/177457083)
Modifier.draggable now accepts DraggableState instead of a simple lambda. you can create state via rememberDraggableState { delta -> } to get the same behaviour as before (Ica70f, b/175294473)
animate, animatedValue, AnimatedValue APIs have been removed (If27bc, b/177457083)
AnimationEndReason.Interrupted is removed. CancellationException will be throws if animation is interrupted. (I2cbbc, b/179695417)
TargetAnimation API has been removed. (If47d1, b/177457083)

Version 1.0.0-alpha12

February 10, 2021

androidx.compose.animation:animation:1.0.0-alpha12 and androidx.compose.animation:animation-core:1.0.0-alpha12 are released. Version 1.0.0-alpha12 contains these commits.

API Changes

Modifier.pointerInput now requires remember keys to indicate when the pointer input detection coroutine should restart for new dependencies. (I849cd)
Bounds has been renamed to DpRect (I4b32a)
Unified the param name for AnimationSpec to animationSpec across the animation system. Also constrain the Enter/ExitTransition to accept FiniteAnimationSpec. (Ie47c5, b/177457083)
Animatable.snapTo and Animatable.stop are now suspend functions (If4288)
Similarly to how we previously removed state { 0 } composable and now promote usage like remember { mutableStateOf(0) } we are going to remove savedInstanceState { 0 } composable. You should use rememberSaveable { mutableStateOf(0) } instead and it will save and restore automatically if the type used inside the MutableState can be stored in the Bundle. If previously you were passing a custom saver object now you need to use a new overload of rememberSaveable which has stateSaver parameter. The usage will look like this: val holder = rememberSaveable(stateSaver = HolderSaver) { mutableStateOf(Holder(0)) } (Ib4c26, b/177338004)
Updated Crossfade's method signature to be more consistent with the rest of the animation system. (Ib05ed, b/177457083)
rememberSavedInstanceState() was renamed to rememberSaveable() and moved to androidx.compose.runtime.saveable package. (I1366e, b/177338004)
RestorableStateHolder was renamed to SaveableStateHolder and moved to androidx.compose.runtime.saveable package. Inner method RestorableStateProvider was renamed to SaveableStateProvider. Generic type was removed so you can just pass Any as a key. Experimental annotation is not needed anymore. (I0902e, b/174598702)
Updated Modifier.animateContentSize API to be consistent with the rest of the animation system. (I0bf75, b/177457083)
AnimatedValue/Float is now deprecated. Please use Animatable instead. (I71345, b/177457083)
tapGestureFilter, doubleTapGestureFilter, longPressGestureFilter and pressIndicaitonGestureFilter have been deprecated. Use Modifier.clickable or Modifier.pointerInput with detectTapGestures function instead. (I6baf9, b/175294473)
Introduced an InfiniteAnimationPolicy coroutine context element that will be applied in infinite animations. By default no policy is installed, except when running tests with ComposeTestRule. (I50ec4, b/151940543)
Destructuring and copy() methods have been removed from several classes where they were rarely used. (I26702, b/178659281)
Playtime in animation is now unfiied to nanoseconds (If776a)
The compose:runtime-dispatch artifact is now deprecated. MonotonicFrameClock can now be found in compose:runtime and AndroidUiDispatcher can be found in compose:ui. (Ib5c36)
Added Animation.isInfinite and VectorizedAnimationSpec.isInfinite that signal if an animation is infinite or not. This can be used in implementations of animations to have special handling of such animations. For example, a special "time remaining" message can be shown, or during tests the animation can be cancelled to prevent waiting for idleness indefinitely. (Iebb05, b/151940543)
Use Long instead of Uptime as animation time type (Ie3aa7, b/177420019)

Version 1.0.0-alpha11

January 28, 2021

androidx.compose.animation:animation:1.0.0-alpha11 and androidx.compose.animation:animation-core:1.0.0-alpha11 are released. Version 1.0.0-alpha11 contains these commits.

API Changes

TransitionDefinition-based Transition has been deprecated (I0ac57)
A label field is added for Transition and child animations to be displayed in tools (I619fb)
animateAsState is now animateFooAsState, where Foo is the type of the variable being animated. e.g. Float, Dp, Offset, etc (Ie7e25)
New InfiniteTransition that runs any number of child animations. (I1da81)
Changes Material stateful parameter interfaces to have @Composable functions that return State<T>. Adds Animatable.asState() to make it easier to convert an Animatable to a State. Also changes animateElevation to be a suspend extension on Animatable. (If613c)

Bug Fixes

onCommit, onDispose, and onActive have been deprecated in favor of SideEffect and DisposableEffect APIs (If760e)
Initial State in updateTransition is now supported (Ifd51d)
Content description parameter has been added to the Image and Icon. It is used to provide description to the accessibility services (I2ac4c)
invalidate and compositionReference() are now deprecated in favor of currentRecomposeScope and rememberCompositionReference respectively. (I583a8)
Duration and Uptime will be replace with Long milliseconds, and this step removes the dependency of pointer input on those classes. (Ia33b2, b/175142755, b/177420019)
clickable, toggleable and selectable can be created outside of composition now (I0a130, b/172938345, b/175294473)
Easing has been changed to a functional interface (Ib14e5)
New items(count: Int) factory method for scope of LazyColumn/LazyRow/LazyVerticalGrid. items(items: List) and itemsIndexed(items: List) are now extension functions so you have to manually import them when used. New extension overloads for Arrays: items(items: Array) and itemsIndexed(Array) (I803fc, b/175562574)
Leverage TestCoroutineDispatcher in testing (I532b6)
Removed PointerInputData and modified PointerInputChange to give it all of PointerInputData's fields. Made PointerInputEvent and PointerInputEventData internal because they aren't used in any public API. (Ifff97, b/175142755)

Version 1.0.0-alpha10

January 13, 2021

androidx.compose.animation:animation:1.0.0-alpha10 and androidx.compose.animation:animation-core:1.0.0-alpha10 are released. Version 1.0.0-alpha10 contains these commits.

API Changes

Modified Velocity to have component parts and mathematical operations. (Ib0447)
Renamed @ExperimentalTesting to @ExperimentalTestApi to be consistent with similar experimental api annotations (Ia4502, b/171464963)
Renamed Position to DpOffset and removed getDistance() (Ib2dfd)
Removed Any.identityHashCode() public api (I025d7)

Bug Fixes

New coroutine-based API Animatable that ensures mutual exclusiveness among its animations. New DecayAnimationSpec to support multi-dimensional decay animation (I820f2, b/168014930)
animate() is now replaced with animateAsState(), which returns a State<T> instead of T. This allows better performance, as the invalidation scope can be narrowed down to where the State value is read. (Ib179e)

Version 1.0.0-alpha09

December 16, 2020

androidx.compose.animation:animation:1.0.0-alpha09 and androidx.compose.animation:animation-core:1.0.0-alpha09 are released. Version 1.0.0-alpha09 contains these commits.

API Changes

Moved Dp.VectorConverter, Position.VectorConverter, etc to animation-core, and deprecated the old VectorConveters (If0c4b)
Introduced a whole new set of Transition APIs with improved ease of use, and support for dynamically added animations, and dynamically calculated animation targets. This APIs are marked experimental for easy differentiation from the TransitionDefinition-based API. (Ia7fe3)

Bug Fixes

Lambdas in offset modifiers now return IntOffset rather than Float. (Ic9ee5, b/174137212, b/174146755)
Deprecate LazyColumnFor, LazyRowFor, LazyColumnForIndexed and LazyRowForIndexed. Use LazyColumn and LazyRow instead (I5b48c)
For suspending pointer input APIs, renamed HandlePointerInputScope to AwaitPointerEventScope and handlePointerInput() to awaitPointerEventScope(). (Idf0a1, b/175142755)
New infiniteRepeatable function for creating an InfiniteRepeatableSpec (I668e5)
Removed ExperimentalPointerInput annotation (Ia7a24)

Version 1.0.0-alpha08

December 2, 2020

androidx.compose.animation:animation:1.0.0-alpha08 and androidx.compose.animation:animation-core:1.0.0-alpha08 are released. Version 1.0.0-alpha08 contains these commits.

API Changes

Added lint check for composable lambda parameter naming and position, to check for consistency with Compose guidelines. Also migrated some APIs using children as the name for their trailing lambda to content, according to the lint check and guidance. (Iec48e)
Previously Deprecated APIs were removed:
- Modifier.onPositioned was removed, use Modifier.onGloballyPositioned.
- Modifier.onDraw was removed, use Modifier.onDrawBehind.
- Modifier.plus was removed, use Modifier.then.
- Color.Unset was removed, use Color.Unspecified.
- PxBounds class was removed, use Rect instead.
- (Ie9d02, b/172562222)
Temporarily added option to let the TestAnimationClock be driven by the MonotonicFrameClock (I1403b, b/173402197)

Bug Fixes

Renamed Modifier.drawLayer to Modifier.graphicsLayer Also updated related classes to GraphicsLayer as per API council feedback. (I0bd29, b/173834241)
Added Modifier.scale/rotate APIs as conveniences for drawLayer.
- Renamed Modifier.drawOpacity to Modifier.alpha
- Renamed Modifier.drawShadow to Modifier.shadow (I264ca, b/173208140)
Made PointerInputData's uptime and position fields non-nullable. (Id468a)
offsetPx modifiers were renamed to offset. They are now taking lambda parameters instead of State. (Ic3021, b/173594846)
New APIs for running animations in coroutines (Ied662)
Deprecated Ambients named with Ambient as their suffix, and replaced them with new properties prefixed with Ambient, following other Ambients and Compose API guidelines. (I33440)
Time control in tests (TestAnimationClock and its usages) is now experimental (I6ef86, b/171378521)
Remove old ui-test module and its stubs (I3a7cb)
RestorableStateHolder.withRestorableState function was renamed to RestorableStateProvider (I66640)
The Alignment interface was updated and made functional. (I46a07, b/172311734)

Version 1.0.0-alpha07

November 11, 2020

androidx.compose.animation:animation:1.0.0-alpha07 and androidx.compose.animation:animation-core:1.0.0-alpha07 are released. Version 1.0.0-alpha07 contains these commits.

Bug Fixes

The foundation AmbientTextStyle, ProvideTextStyle, and AmbientContentColor have been deprecated. Instead use the new versions available in the Material library. For non-Material applications, you should instead create your own design system specific theming ambients that can be consumed in your own components. (I74acc, b/172067770)
foundation.Text has been deprecated and replaced with material.Text. For a basic, unopinionated text API that does not consume values from a theme, see androidx.compose.foundation.BasicText. (If64cb)
MeasureResult was moved out of MeasureScope. (Ibf96d, b/171184002)
Several layout related symbols were moved from androidx.compose.ui to androidx.compose.layout.ui. (I0fa98, b/170475424)

Version 1.0.0-alpha06

October 28, 2020

androidx.compose.animation:animation:1.0.0-alpha06 and androidx.compose.animation:animation-core:1.0.0-alpha06 are released. Version 1.0.0-alpha06 contains these commits.

API Changes

Enable transitions in ComposeTestRule; remove option to enable the blinking cursor from ComposeTestRule. (If0de3)

Version 1.0.0-alpha05

October 14, 2020

androidx.compose.animation:animation:1.0.0-alpha05 and androidx.compose.animation:animation-core:1.0.0-alpha05 are released. Version 1.0.0-alpha05 contains these commits.

API Changes

New Animation interface and subclasses: These classes store the start and end conditions for animations, and therefore allow value and velocity to be queried via only playtime (Ie95bd, b/163329867)

Bug Fixes

OnPositionedModifier is renamed to OnGloballyPositionedModifier and onPositioned() is renamed to onGloballyPositioned(). (I587e8, b/169083903)
Deprecates contentColor() and currentTextStyle() APIs, and replaces them with AmbientContentColor and AmbientTextStyle ambients respectively. You can access the current value by using .current on the ambient property, as with any other ambient. This was change was made for consistency and to avoid having multiple ways to accomplish the same thing. Additionally renames some ambient properties to better describe their purpose as follows:
- ContentColorAmbient -> AmbientContentColor
- TextStyleAmbient -> AmbientTextStyle
- IndicationAmbient -> AmbientIndication
- EmphasisAmbient -> AmbientEmphasisLevels
- RippleThemeAmbient -> AmbientRippleTheme (I37b6d)

Version 1.0.0-alpha04

October 1, 2020

androidx.compose.animation:animation:1.0.0-alpha04 and androidx.compose.animation:animation-core:1.0.0-alpha04 are released. Version 1.0.0-alpha04 contains these commits.

API Changes

Annotated rootAnimationClockFactory, transitionsEnabled, blinkingCursorEnabled and textInputServiceFactory with @VisibleForTesting, make them internal API and hide their kdoc (I554eb, b/168308412)

Bug Fixes

Updated many Graphics APIs
- Updated scale and rotation transformation APIs to consume a single Offset parameter to represent the pivot coordinate instead of separate float parameters for the x/y coordinates in DrawScope and DrawTransform
- Removed Rect.expandToInclude and Rect.join methods
- Updated Radius documentation to say oval in addition to elliptical
- Added documentation to indicate the public constructor for the inline Radius class is not to be called directly but instead Radius objects should be instantiated through their function constructors
- Removed RoundRect APIs to query topRight, bottomRight, bottomCenter, etc.
- Deprecated Rect.shift in favor of Rect.translate
- Removed RoundRect.grow and Rect.shrink APIs
- Renamed RoundRect.outerRect to Rect.boundingRect
- Removed RoundRect.middleRect/tallMiddleRect/wideMiddleRect and Rect.isStadium methods
- Renamed RoundRect.longestSide to RoundRect.maxDimension
- Renamed RoundRect.shortestSide to RoundRect.minDimension
- Changed RoundRect.center to be a property instead of a function
- Updated RoundRect constructor to consume Radius properties instead of individual parameters for x/y radius values
- Removed Size APIs that assumed it was a Rectangle with origin at 0,0
- Added a destructing API to Radius
- Migrated various RoundRect extension functions to be properties instead
- (I8f5c7, b/168762961)
foundation.Box was deprecated. Please use foundation.layout.Box instead. (Ie5950, b/167680279)
Stack was renamed to Box. The previously existing Box will be deprecated in favor of the new Box in compose.foundation.layout. The behavior of the new Box is to stack children one on top of another when it has multiple children - this is different from the previous Box, which was behaving similar to a Column. (I94893, b/167680279)
Box decoration parameters have been deprecated. If you want to have decorations/padding on your box, use Modifiers instead (Modifier.background, Modifier.border, Modifier.padding) (Ibae92, b/167680279)
We prevented static imports of contents of layout scopes (e.g. alignWithSiblings in RowScope). The explicit scope alternative should be used instead: with(RowScope) { Modifier.alignWithSiblings(FirstBaseline) }. (I216be, b/166760797)

Version 1.0.0-alpha03

September 16, 2020

androidx.compose.animation:animation:1.0.0-alpha03 and androidx.compose.animation:animation-core:1.0.0-alpha03 are released. Version 1.0.0-alpha03 contains these commits.

Bug Fixes

Usages of gravity were consistently renamed to align or alignment in layout APIs. (I2421a, b/164077038)

Version 1.0.0-alpha02

September 2, 2020

androidx.compose.animation:animation:1.0.0-alpha02 and androidx.compose.animation:animation-core:1.0.0-alpha02 are released. Version 1.0.0-alpha02 contains these commits.

API Changes

Added ManualFrameClock.hasAwaiters to see if anything is awaiting a frame from that clock; runWithManualClock as a replacement for runBlocking when running tests that need a ManualFrameClock; TestUiDispatcher.Main that gives easy access to the main UI dispatcher in your tests.

For example:

@Test
fun myTest() = runWithManualClock { clock ->
    // set some compose content
    withContext(TestUiDispatcher.Main) {
        clock.advanceClock(1000L)
    }
    if (clock.hasAwaiters) {
        println("The clock has awaiters")
    } else {
        println("The clock has no more awaiters")
    }
}

(I0a85b, b/161247083)

Bug Fixes

onPreCommit is deprecated; onCommit now has onPreCommit's behavior.

onCommit and onActive now run in the same choreographer frame that the composition changes committed in rather than at the beginning of the next choreographer frame. (I70403)

Version 1.0.0-alpha01

August 26, 2020

androidx.compose.animation:animation:1.0.0-alpha01 and androidx.compose.animation:animation-core:1.0.0-alpha01 are released. Version 1.0.0-alpha01 contains these commits.

Version 0.1.0-dev

Version 0.1.0-dev17

August 19, 2020

androidx.compose.animation:animation:0.1.0-dev17 and androidx.compose.animation:animation-core:0.1.0-dev17 are released. Version 0.1.0-dev17 contains these commits.

New Features

API Changes

Offset has become an inline class (Iaec70)
IntOffset is now an inline class (Iac0bf)
IntSize is now an inline class (I2bf42)
AnimatedVisibilty composable animates the appearance and disappearance of the child content.

EnterTransition and ExitTransition are introduced to work with AnimatedVisibilty composable to provide 3 different typs of appearance and disappearance animation: fade, slide, and expand/shrink the content. The different types of animations can be combined to achieve more bespoke look and feel. (Idda11)
Deprecated PxBounds in favor of Rect. Updated all usages of PxBounds with rect and added proper deprecate/replace with annotations to assist with the migration. (I37038, b/162627058)

Bug Fixes

PlacementScope.placeAbsolute() was renamed to PlacementScope.place(), and the previous PlacementScope.place() was renamed to PlacementScope.placeRelative(). As a result, the PlacementScope.place() method will not automatically mirror the position in right-to-left contexts anymore. If this is desired, use PlacementScope.placeRelative() instead. (I873ac, b/162916675)
The state { ... } composable is now deprecated in favor of explicit calls to remember { mutableStateOf(...) } for clarity. This reduces the overall API surface and number of concepts for state management, and matches the by mutableStateOf() pattern for class property delegation. (Ia5727)

Version 0.1.0-dev16

August 5, 2020

androidx.compose.animation:animation:0.1.0-dev16 and androidx.compose.animation:animation-core:0.1.0-dev16 are released. Version 0.1.0-dev16 contains these commits.

API Changes

Built-in vector converters to convert built-in units are now accessible via Foo.VectorConverter. e.g. Dp.VectorConverter, Color.VectorConverter, Float.VectorConverter, etc (I3e273)
Support end listener in Modifier.animateContentSize() such that when size change animation finishes, the listener will be notified, along with start/end size of the animation. (I277b2)
New animateContentSize modifier that animates the layout size change of its child modifier (Ieffdc)
Added MonotonicFrameAnimationClock that enables you to use a MonotonicFrameClock as an AnimationClockObservable to bridge the gap between the new coroutines based clocks and APIs that still use the old callback based clocks.

The MonotonicFrameClockequivalent of ManualAnimationClock is now ManualFrameClock. (I111c7, b/161247083)

Bug Fixes

The APIs for right-to-left support has been updated. LayoutDirectionAmbient has been added, which can be used to read and change the layout direction. Modifier.rtl and Modifier.ltr have been removed. (I080b3)
Require type T to be explicitly specified for transitionDefinition. (I1aded)
foundation.shape.corner package were flatten to foundation.share (I46491, b/161887429)
Modifier.plus has been deprecated, use Modifier.then instead. 'Then' has a stronger signal of ordering, while also prohibits to type Modifier.padding().background() + anotherModifier, which breaks the chain and harder to read (Iedd58, b/161529964)
Modifier.drawBackground has been renamed to Modifier.background (I13677)

Version 0.1.0-dev15

July 22, 2020

androidx.compose.animation:animation:0.1.0-dev15 and androidx.compose.animation:animation-core:0.1.0-dev15 are released. Version 0.1.0-dev15 contains these commits.

Dependencies Update

To use the 0.1.0-dev15 version of Compose, you will need to update your dependencies according to the new code snippets shown above in Declaring dependencies.

API Changes

Transition API has been changed to return a TransitionState instead of passing the TransitionState to children. This makes the API more consistent with animate() APIs. (I24e38)
Modifier parameter added for Crossfade (I87cfe, b/159706180)
Use AnimationSpec instead of AnimationBuilder in the top level APIs to clarify the concept of static animation specification
- Improve the transition DSL by removing the lambda requirement for creating AnimationSpecs such as tween, spring. They instead take constructor params directly.
- Improve the overall ease of use of AnimationSpec opening up constructors instead of relying on builders
- Change the duration and delay for KeyFrames and Tween to Int. This eliminates unnecessary type casts and method overloading (for supporting both Long and Int). (Ica0b4)
Replaced usage of IntPx with Int. Replaced IntPxPosition with IntOffset. Replaced IntPxSize with IntSize. (Ib7b44)
In order to consolidate the number of classes used to represent sizing information, standardize on usage of the Size class instead of PxSize. This provides the benefits of an inline class to leverage a long to pack 2 float values to represent width and height represented as floats. (Ic0191)
In order to consolidate the number of classes used to represent positioning information, standardize on usage of the Offset class instead of PxPosition. This provides the benefits of an inline class to leverage a long to pack 2 float values to represent x and y offsets represented as floats. (I3ad98)
Replaced usage of Px class in various compose classes as part of the large refactoring effort to only rely on Dp and primitive types for pixel parameters (I086f4)
Added animate() support for Dp, Px, Size, Position, Bounds, PxPosition, PxSize, PxBounds, IntPx, IntPxSize, IntPxPosition, IntPxBounds, and AnimationVector (Ib7518)
Crossfade now accepts optional AnimationBuilder param to allow configuring the animation (I6d6e0)
Replaced all nullable Color uses in API with non-nullable and use Color.Unset instead of null (Iabaa7)
Removed ValueHolder class. Restructured AnimatedValue, AnimatedFloat classes to make the animation value field abstract so that subclasses can watch the value update.
- Added model classes for AnimatedValue, AnimatedFloat, etc.
- Added a new set of light-weight @Composable API for animating between values. (I79530)
Breaking changes to the ambients API. See log and Ambient<T> documentation for details (I4c7ee, b/143769776)
New repeat mode: Reverse. This mode reverses the previous iteration as the animation repeats in RepeatableSpec or VectorizedRepeatableSpec. (Ibe0f5)
API additions to ManualAnimationClock: hasObservers: Boolean and constructor parameter dispatchOnSubscribe: Boolean (Iaa134)
Added APIs for getting min/max bounds in AnimatedFloat (Icd9cc)

Bug Fixes

runOnIdleCompose renamed to runOnIdle (I83607)
Several testing APIs were renamed to be more intuitive. All findXYZ APIs were renamed to onNodeXYZ. All doXYZ APIs were renamed to performXYZ. (I7f164)
Introduced low level stateless animation APIs. These APIs (I63bf7)
The Recompose composable is no longer a useful abstraction. Most recomposition should happen as a result of MutableState assignments. For anything beyond that, it is recommended that you use the invalidate function to trigger a recomposition of the current scope. (Ifc992)
Replaced usage of Px class in various compose classes as part of the large refactoring effort to only rely on Dp and primitive types for pixel parameters. Deleted Px class in its entirety (I3ff33)
Replaced usage of Px class in various compose classes as part of the large refactoring effort to only rely on Dp and primitive types for pixel parameters (Id3434)
Crossfade can now work with null as initial value (Iad6a4, b/155947711)
Replaced usage of Px class in various compose classes as part of the large refactoring effort to only rely on Dp and primitive types for pixel parameters (I19d02)
Consolidated CanvasScope implementations so there is now just DrawScope and ContentDrawScope Renamed CanvasScope to DrawScope. Updated DrawScope to implement Density interface and provide LayoutDirection Deleted DrawScope subclass in ContentDrawScope Painter and PainterModifier have been updated to no longer maintain an RTL property themselves as DrawScope provides this already without manually providing it (I1798e)
Updated higher level compose APIs that expose a Canvas to expose CanvasScope instead. This removes the need for consumers to maintain their own Paint objects. For consumers that still require access to a Canvas they can use the drawCanvas extension method which provides a callback to issue drawing commands with the underlying Canvas. (I80afd)
Added verticalGravity and horizontalGravity parameters to Row and Column, respectively. (I7dc5a)
ui-text module is renamed as ui-text-core (I57dec)
Improve DrawModifier API:
- Made the receiver scope for draw() ContentDrawScope
- Removed all parameters on draw()
- DrawScope has same interface as former CanvasScope
- ContentDrawScope has drawContent() method (Ibaced, b/152919067)
runOnIdleCompose and runOnUiThread are now global functions instead of methods on ComposeTestRule. (Icbe8f)
[Mutable]State property delegate operators moved to extensions to support Kotlin 1.4 property delegate optimizations. Callers must add imports to continue using by state { ... } or by mutableStateOf(...). (I5312c)
ColoredRect has been deprecated. Use Box(Modifier.preferredSize(width, height).drawBackground(color)) instead. (I499fa, b/152753731)
Replaced Modifier plus operator with factory extension functions (I225e4)
Deprecated Center composable. It should be replaced either with the LayoutSize.Fill + LayoutAlign.Center modifier, or with one of the Box or Stack composables with suitable modifiers applied (Idf5e0)
Renamed LayoutFlexible to LayoutWeight. Renamed tight parameter to fill. (If4738)
The Opacity composable function has been replaced with the drawOpacity modifier. (I5fb62)
Tests using AndroidComposeTestRule now provide an animation clock at the root of the composition that allows it to be paused, resumed and advanced manually. (Id54c5)
Support right-to-left direction in LayoutPadding modifier (I9e8da)
Density and DensityScope were merged into one interface. Instead of ambientDensity() you can now use DensityAmbient.current. Instead of withDensity(density) just with(density) (I11cb1)
Added copy methods to various inline class types including:
- Offset
- Size
- Radius
- Motion
- TransformOrigin
- Deprecated Size.copy companion object method favor of instance copy method (Ife290, b/159905651)
androidx.compose.ViewComposer has been moved to androidx.ui.node.UiComposer androidx.compose.Emittable has been removed. It was redundant with ComponentNode. androidx.compose.ViewAdapters has been removed. They are no longer a supported use case. Compose.composeInto has been deprecated. Use setContent or setViewContent instead. Compose.disposeComposition has been deprecated. Use the dispose method on the Composition returned by setContent instead. androidx.compose.Compose.subcomposeInto has moved to androidx.ui.core.subcomposeInto ComponentNode#emitInsertAt has been renamed to ComponentNode#insertAt ComponentNode#emitRemoveAt has been renamed to ComponentNode#removeAt ComponentNode#emitMode has been renamed to ComponentNode#move (Idef00)