How to restart Unity Player Android

I have an app which in an activity opens with a subview containing UnityPlayer. This works well and as expected.

Next, I open a fragment which also contains a a subview with a UnityPlayer. This subview also works.

Problem is, when this fragment is closed, the activities subview shows a frozen image of the scene and will eventually crash. I am unsure how to continue, has anyone managed to pass the UnityPlayer between fragments or kept an alive instance or any other idea for this?

 

I managed to get this to work by using a singleton containing the UnityPlayer and then making sure that the onStop() and onDestroy() methods only get called when the activity isFinishing(). Then when going from Activity to fragment I can just reuse the same UnityPlayer (trick is to detach the parent views first ).

This works well as the context isn't changing as it is the same activity. I tried to apply the same logic to onOrientationChange() where the view gets destroyed and recreated. However, onOrientationChange() creates a new context each time and this means the singleton UnityPlayer (while appearing to work as all message calls are static) is still retaining the old context. I can't find a work around for this, as my only option to change context seems to be to create a new Unity Player which then breaks everything.

Any ideas on how to do this?

 

4 years later, this is the *only* approach I've tried that works for Unity player reuse (the multiprocess + sockets may work, but I never tried it: https://forum.unity.com/threads/how-to-exit-unityplayeractivity-not-to-kill-whole-process.546619/ ).

I haven't needed to test orientation change => auto new context with respect to Unity player reuse. Did you ever find a solution to that one?