Three.js on Android: how to replace GLTF model at runtime?

I copied/pasted all the code of this page in my Android app (in the ‘assets’ folder of my apk).

When I open webgl_loader_gltf.html in a webview of my Android app, everything (the helmet and the background) is diplayed properly.

Now, I want to open at runtime the same webgl_loader_gltf.html but I want to display a model that has been created by my app instead of the helmet included in my app ‘assets’ folder. How can I do that ?

Thanks a lot!