Hello. On the old Transition API,

transition

s had

onStateChangeFinished

callback. Does anyone know if there's a similar callback on the new API?

Most of the animation apis have an animation ended event handler that gets a reason

The new animation (

animate*asState(...)

) apis have

finishedListener

parameters, yes. However, the transition apis (

updateTransition

,

transition.animate*(..)

) do not. So, when handling transitions, I'm not sure if there's a way to know "all the animations for this transition have ended"

The new transition has a

currentState

that can be observed.

currentState == targetState

signals that the transition for all animations has finished. 🙂

Thanks @Doris Liu! At the beginning it was a bit complicated to wrap my head around transition changes as State updates, but makes sense! I got it working, thank you 🙏

Glad it worked for you! 🙂 Expressing the finished event as a state change makes sequencing transition states a bit nicer, like in this example: https://cs.android.com/androidx/platform/frameworks/support/+/androidx-main:compose/[…]/androidx/compose/animation/demos/DoubleTapToLikeDemo.kt;l=74

wooow... yes, that indeed looks pretty. And here I was writing a queue of states to handle sequencing transition states 🙃

once I'm done with my changes, I would really appreciate your feedback, if possible

Sure thing! I'm happy to take a look! 🙂