SharedElementTransition

[Aqua-Ye]

I'm trying to make the Slidr work with SharedElementTransition.
I have an image on Activity A, that transitions to Activity B.
I then start to swipe back to Activity A, but the image is blank in Activity A while the slide occurs.
It only appears when the finish() method of the Activity B is called (by Slidr)

Any idea how I could make the image visible on Activity A as soon as the drag starts?

[hakonschia]

Late answer, but maybe it will be useful for someone else.

As far as I can tell by looking at the code, the framework for shared element transitions simply sets the alpha of the views to 0 (search for the class ActivityTransitionCoordinator.java and the method hideViews()). Therefore all we have to do is set it back manually.

val options = ActivityOptionsCompat.makeSceneTransitionAnimation(activity, view, "transitionName")
startActivity(intent, options.toBundle())

MainScope().launch {
    delay(750)
    view.alpha = 1f
}

There needs to be some delay, presumably to be sure that the framework sets the alpha to 0 first. Ideally a listener would be used, but I'm not sure if there is one for listening in the calling activity.