Any way to run an apk on a jetson nano, using webcam?

In default L4T releases, it is with Ubuntu OS. We don’t have release with Android OS. This would see if other forum users can share experience.

For launching webcam/usbcam, we suggest try gstreamer command. Please refer to
Jetson Nano FAQ
[Q: I have a USB camera. How can I launch it on Jetson Nano?]