Android NetworkInterface. What are the meanings of names of NetworkInterface?

Question

I want to get available network of the current device, so I firstly get networkinterfaces list:

NetworkInterface.getNetworkInterfaces();

Then,

Answer 1

ap or swlan interfaces (depending on the Android distribution) can be found when the Mobile Hotspot (Access Point) is activated on an Android device. It might also be associated with a regular wlan interface though (observed on devices where it is not possible to activate the WiFi connection and Mobile Hotspot at the same time, e.g. Android 9 on Galaxy Tab S2).