I want to get available network of the current device, so I firstly get networkinterfaces list:
NetworkInterface.getNetworkInterfaces();
Then,
Since Android is based on Linux, Linux network interface naming patterns apply to Android devices.
Here's some resources on *nix network interface naming
To summarize:
lo
usually stands for the loopback interface (localhost)
wlan
usually stands for a wireless networking interface
rmnet
interfaces are usually associated with cellular connections and usb tethering
sit
interfaces are associated with tunneling IPv6 over IPv4
p2p
interfaces are usually associated with peer-to-peer connections (perhaps your Android device's WiFi Direct support?)
dummy
interfaces provide special aliases for the loopback interface