How to let Webview to background layer.

[tranlong021988]

Hi, thank you for amazing lib and sorry because I'm not talking about any issue.
I'm building a 3d app using BabylonHx library, it will be VR game. Unfortunately, there are no device-orientation-event which have alpha beta gamma output from OpenFl API so I 'm planning to do a trick, using webview to access device orientation event and then push back values to OpenFL app (almost modern mobile browser support that event). But this library just have only 2 options (popup and window) so I wonder how to open webview in backgrond, it will solve my problem.
So can you point me how to manual config webview to let it behind everything, I don't know Java programming.
Sorry for my poor English.