How to add android expansion files using Qt

问题

I am currently developing an Android app using Qt / QML and my app will be a lot larger than the 50 MB Google Play Store limit due to media files that are to be bundled, so I have to use extension files. After some searching I found on a page a line saying that Qt resource system can help make .obb extension files:

"For large resources that do not fit into the Google Play store 50 MB limit, qrc can generate rcc files that can be put in obb"

but I can not find any information on how to do this or how to access those files from my code.

EDIT: I have made an .rcc file using Qt. Trying to convert it to .obb now. Anyone done this using the jobb tool?

I was also thinking that I could just upload the .rcc file directly as Google Play accepts any file format for expansion files, but then I would not be able to get it encrypted.. but how could I access the .rcc file? Do I have to write some Java code or could I get it to work from Qt C++/QML?

EDIT: I figured it out. I created an external binary resource file using the rcc tool available in Qt command prompt. Using QResource class I can load the external binary resource file and access it as it was a normal qrc resource file.