Conent Transition NPE with empty shared elements

Question

I am adding content transitions to a pretty large app and in most cases I do not have any shared elements but still want to use the transition animations. I have tracked the problem down to this line of code:

ActivityOptionsCompat.makeSceneTransitionAnimation(activity, ????);

I have tried setting Pair array to null or an empty array and I have tried just leaving it out. Everything results in the following error:

java.lang.NullPointerException: Attempt to invoke virtual method 'void android.view.ViewRootImpl.setPausedForTransition(boolean)' on a null object reference

However, I only get this error on Android 6.0+, it works fine on any version of Android 5. Am I trying to do this the wrong way?

Answer 1

I did a bunch of digging in the source code and it looks like this is caused by a missed null pointer check that got fixed for Nougat.

I've got no clue how to work around it on 6.x though, unfortunately. I suppose you could add a 6.x try/catch if it's really killing you in terms of crashes, but that may also catch a bunch of other stuff you may not want it to.