When I shrink a Card using a tween animation how can change kotlinlang #compose

When I shrink a Card using a tween animation, how can change the size another card as soon as the tween animation is finished? Traditionally, I’d think of an end-Listener and start an animation on another View

Jeisson Sáchica

01/04/2021, 7:29 PM

How are you firing the animation? the

animate

composable takes an

endListener: (Float) -> Unit

Or if you're using an

AnimatedFloat

, the

animateTo

method takes an

onEnd: (AnimationEndReason, T) -> Unit

Christian Maier

01/04/2021, 8:02 PM

I’m using a

transitionDefinition

Than I’m starting a

transition()

with that definition

Can I achieve that with these tools?

Jeisson Sáchica

01/04/2021, 8:08 PM

Great! Then there is an optional parameter that composable takes which is a

onStateChangeFinished: (T) -> Unit

👍 1

So if you have let's say t wo states: Visible and Collapsed, that callback will be called when the animation changes from one to the other

Christian Maier

01/04/2021, 8:10 PM

I should’ve seen that. 😕

Perfect, just what I needed!

✅ 1

Thank you very much!

Jeisson Sáchica

01/04/2021, 8:10 PM

No problem

Christian Maier

01/04/2021, 8:11 PM

I need to pay more attention but the signatures, but some are really long. Anyways, bad excuse!

Jeisson Sáchica

01/04/2021, 8:13 PM

No worries, one can easily miss them among that many parameters. Even the definition of the

transition

states

// TODO: The list of params is getting a bit long. Consider grouping them.

So that will most probably change for the better in the future