Answer by Harry1992 for How can I access my localhost from my Android device?

The easier way to default localhost is to use http://localhost:port. This works in a laptop and Android as well.

If it does not work, then in android set the default IP of your phone to 127.0.0.1:port :)

Open terminal and type :-

 hostname -i
 #127.0.0.1
 hostname -I
 #198.168.*.*