TransitionDrawable completed

Question

I am running an animation in my Android app using the following code:

RelativeLayout layout = (RelativeLayout) findViewById(R.id.relativeLayout1);
layout.setBackgroundResource(R.drawable.translate);
final TransitionDrawable transition = (TransitionDrawable) layout.getBackground();
transition.startTransition(9000);

The animation runs for 9 seconds, and then it needs to be reversed.

At the moment I am using a countdown timer (already one running in the app), to check if 9 seconds has gone by and manually reverse the transition....

Is there a better way to do this?

Thanks

Answer 1

To answer my own question, no there is no onCompletionListener. Instead you do have to manually count the seconds and then reverse the transision.

I also asked this question during an Android Developer Hangout with Google, and it could not be answered in any other way.

Answer 2

I've recently come up against this problem and needed to transition between several images in a loop. I've posted an answer here with a custom class based on TransitionDrawable. It would be fairly simple to build callbacks into that class.

Hopefully this will help anyone else struggling with TransitionDrawables.