Quit fullscreen mode when change orientation in Android 8.1

[xiachengcheng]

Thank you for this lib, it's very useful. But recently I met a strange issue.
My app shows text and videos like this image:

And play video in full screen like:

But when I change orientation to landscape, it will quit fullscreen, like this:

When orientation changed, onHideCustomView() will be called and quit full-screen mode.
I don’t why it happened, and how can I keep it in full-screen mode even when change orientation?

Forget to say, it work very well in pre-8.1 android devices.

Thank you.