Hey <@UNH9ZT3NZ> are there any samples of how to u...

# compose

[Mehdi Haghgoo]

Hey @Doris Liu are there any samples of how to use low-level animation APIs like Animation, animate and AnimationState?

[Doris Liu]

For animate we have a sample here in the reference doc: https://developer.android.com/reference/kotlin/androidx/compose/animation/core/package-summary#animate(kotlin.Float,kotl[…]ionSpec,kotlin.Function2)

In demos: https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/[…]te%5C(&amp;ss=androidx%2Fplatform%2Fframeworks%2Fsupport&amp;start=21
and https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/[…]te%5C(&amp;ss=androidx%2Fplatform%2Fframeworks%2Fsupport&amp;start=11

For AnimationState we have a sample here: https://developer.android.com/reference/kotlin/androidx/compose/animation/core/AnimationState#(androidx.compose.animati[…].Boolean,kotlin.Function1)

[Doris Liu]

It might be a good idea to add an example for at least animate in the official tutorial here: https://developer.android.com/jetpack/compose/animation
cc+ @Rebecca Franks

[Mehdi Haghgoo]

@Doris Liu there is already an example on TargetBasedAnimation that animates a value. However, it does not show its use for any UI related animation.
I made a small demo with the help of TargetBasedAnimation. Is this how it’s supposed to be used?

[Doris Liu]

Your demo is definitely a good way to use TargetBasedAnimation . 🙂 The distinct feature of TargetBasedAnimation is that it allows you to query value and velocity for any playtime once it's set up. It has no lifecycle. Nor does it expect the playtime to be monotonically increasing. Therefore you could potentially use gestures to manipulate that playtime before feeding it to TargetBasedAnimation to achieve seeking. That's how we intend for seeking to work in Transition some day, by changing the playtime on the TargetBasedAnimation s that it creates under the hood.