See how to animate state values, using transitions, animating visibility or size changes and crossfades by using the Compose animation APIs. [Video](https://www.youtube.com/watch?v=7yY2OocGiQU) ## Key points - The [`animate*AsState`](https://developer.android.com/reference/kotlin/androidx/compose/animation/core/animateDpAsState.composable#animateDpAsState(androidx.compose.ui.unit.Dp,androidx.compose.animation.core.AnimationSpec,kotlin.String,kotlin.Function1)) API is useful for animating a single value based on a state change. - To animate multiple values at the same time, create a transition with the [`updateTransition`](https://developer.android.com/reference/kotlin/androidx/compose/animation/core/updateTransition.composable#updateTransition(kotlin.Any,kotlin.String)) function. - You can declare each animation value with an extension function on the transition object. - To customize the animation behavior, specify the `transitionSpec` parameter. - [`AnimatedVisibility`](https://developer.android.com/reference/kotlin/androidx/compose/animation/AnimatedVisibility.composable#(androidx.compose.animation.core.Transition).AnimatedVisibility(kotlin.Function1,androidx.compose.ui.Modifier,androidx.compose.animation.EnterTransition,androidx.compose.animation.ExitTransition,kotlin.Function1)) is useful for animating appearance and disappearance. - Customize animation behavior by specifying parameters for enter and exit. - To animate size changes of elements, use the [`animateContentSize`](https://developer.android.com/reference/kotlin/androidx/compose/animation/animateContentSize.modifier#(androidx.compose.ui.Modifier).animateContentSize(androidx.compose.animation.core.FiniteAnimationSpec,kotlin.Function2)) modifier. - To animate changes when you swap out portions of your UI, use the [`Crossfade`](https://developer.android.com/reference/kotlin/androidx/compose/animation/Crossfade.composable#(androidx.compose.animation.core.Transition).Crossfade(androidx.compose.ui.Modifier,androidx.compose.animation.core.FiniteAnimationSpec,kotlin.Function1,kotlin.Function1)) composable. ## Collections that contain this guide This guide is part of these curated Quick Guide collections that cover broader Android development goals:   ### Compose basics This series of videos introduces various Compose APIs, quickly showing you what's available and how to use them. [Quick guide collection](https://developer.android.com/develop/ui/compose/quick-guides/collections/compose-basics)   ### Display images Discover techniques for using bright, engaging visuals to give your Android app a beautiful look and feel. [Quick guide collection](https://developer.android.com/develop/ui/compose/quick-guides/collections/display-images)  ## Have questions or feedback Go to our frequently asked questions page and learn about quick guides or reach out and let us know your thoughts. [Go to FAQ](https://developer.android.com/quick-guides/faq) [Leave feedback](https://issuetracker.google.com/issues/new?component=1573691&template=1993320)