IssueTracker

Jetpack Compose version: 1.2.0-beta02 Jetpack Compose component used: Compose Animation

Related to this issue https://issuetracker.google.com/issues/199304067

The fix for the above issue seems to have implemented support for avd repeatCount, however infinite or -1 repeatCount does not seem to be supported by AnimatedImageVector still.

I may be wrong but from this piece of code below in the androidx.compose.animation.graphics.vector.Animator class. This function seems to only make the animation repeatable if the repeatCount is > 0.

internal class Timestamp<T>(
    val timeMillis: Int,
    val durationMillis: Int,
    val repeatCount: Int,
    val repeatMode: RepeatMode,
    val holder: PropertyValuesHolder<T>
) {
    fun asAnimationSpec(): FiniteAnimationSpec<T> {
        @Suppress("UNCHECKED_CAST")
        val spec = when (holder) {
            is PropertyValuesHolderFloat -> holder.asKeyframeSpec(durationMillis)
            is PropertyValuesHolderColor -> holder.asKeyframeSpec(durationMillis)
            else -> throw RuntimeException("Unexpected value type: $holder")
        } as KeyframesSpec<T>
        return if (repeatCount > 0) {
            repeatable(
                iterations = repeatCount + 1,
                animation = spec,
                repeatMode = repeatMode
            )
        } else {
            spec
        }
    }
}

However for xml avd, repeatCount is -1 or the xml enum infinite which in the view world makes the avd loop the animation infinitely. If the repeatCount is -1 in compose animation, as shown in the above code snippet, the animation does not repeat at all and only runs once.

<!-- Defines how many times the animation should repeat. The default value is 0. -->
<attr name="repeatCount" format="integer">
    <enum name="infinite" value="-1" />
</attr>