Is there a way to use only enter (or only exit) animation in

AnimatedVisibility

? I tried

fade

with

tween(duration = 0)

but there is still small delay before the view disappears.

There are

EnterTransition.None

and

ExitTransition.None

.

I looked through the source code but somehow missed those. Thank you 🙏

I'd love to know if that works for you @Filip Wiesner! Whenever I use it, the enter/exit transition is just cut off sometimes.

Sadly it doesn't. It's the same as with

tween(duration = 0)

. It's just not the same as if it's removed from composition with condition directly and has slight delay

Perhaps worth to file a bug report/feature request?

Yeah, I'll do it when I have time

cc @Doris Liu

@Zoltan Demant Could you share more details on the transitions being cut off? The

Enter/ExitTransition.None

is currently handled as an empty transition. In the exit case, it should finish right away (i.e. in a frame). We don't currently short-circuit for

None

, so it does take a frame to finish. Maybe it would make sense to treat it as a special case. @Filip Wiesner Could you share a video of what it looks like when it doesn't work? Curious to see what you are trying to achieve. 🙂

@Doris Liu Sure, I think it happens due to the same reasoning you just gave - its handled as an empty transition, and as such any pending transition is cancelled. When navigating between content A -> B, Ill get repeated calls to

transitionSpec

even though there is no targetState change, for those scenarios I simply specified

Enter/Exit.None

but it also results in the A -> B transition being cut off if the

transitionSpec

is called again before the animation finishes, which is often the case when B changes its contents during the transition (e.g. loading, then actual contents). I ended up always creating an animation instead, so even if the transition goes from B -> B, Ill do the same thing as A -> B; it works almost flawlessly, but in rare cases the wrong transition ends up happening.

@Zoltan Demant Could you record a video of the transition being cut off? That'd be helpful for me to visualize it. 🙏 This sounds like a bug, if you could file a bug with a snippet, I'd really appreciate it. 🙂

@Doris Liu I just tried recreating it, and I couldnt! If I were to guess,

contentKey

is what solved it. I now use it in both this transition, and the "loading then content" one; and Im no longer seeing additional

transitionSpec

calls!