Awesome! That is a nice find. Thank you for sharing it.
Also, thanks for the feedback.
BTW, there’s fairly good support for the USB API and live streaming on Linux.
I’ll expand the document to include other forms of development and add your tip about the apk with attribution to you.
For viewing images on the Linux desktop, I use this:
Installation information on Ubuntu 20.04 is here:
BTW, I just realized that the THETA X can download and install the plug-ins directly from the camera body without any computer or mobile phone. There may be a way to make the process easier on Linux in the future.