hey weird animation question : when using animate...

# compose

[Nathan Castlehow]

hey weird animation question : when using animate*AsState how come i have to set the targetvalue after “animate*AsState” has been created and not just when its initially setup in order for it to run. (Code in thread)

[Nathan Castlehow]

Working

var targetValue by remember { mutableStateOf(0) }

val value by animateIntAsState(
    targetValue = targetValue,
    animationSpec = infiniteRepeatable(
        animation = tween(durationMillis = (targetValue * 5000), easing = LinearEasing),
        repeatMode = RepeatMode.Restart
    )
)

LaunchedEffect(Unit){
   targetValue = descriptions.size
}

[Nathan Castlehow]

Not Working

val value by animateIntAsState(
    targetValue = 10,
    animationSpec = infiniteRepeatable(
        animation = tween(durationMillis = (10 * 5000), easing = LinearEasing),
        repeatMode = RepeatMode.Restart
    )
)

[Nathan Castlehow]

Perhaps its just the way I’m using it?

[Albert Chang]

What do you want to achieve? What should the initial value of value be? The doc explains it well. Basically use animate*AsState when the animation is state-based, which doesn't look like your case.

[Nathan Castlehow]

desired behaviour would be the value starts at 0 and moves up to targetValue. I’m not super clear on why it wouldn’t run with the initial target value? The actual use case is show looping text from a list of strings. The value being the index into it.

[Albert Chang]

animate*AsState doesn't allow you to specify initial value because it's purely state-based and the initial value is just the value of the first state. The example shows the usage of it.

[Albert Chang]

For your use case, rememberInfiniteTransition may be a better fit.

[Nathan Castlehow]

I’ll take a stab with rememberInfiniteTransition. Thanks!