Mobile Print from Kotlin Android App

I have a billing application in Kotlin.
want to give print out from that app.
Need help in building a function so that I will share an html string and it will print that to the connected printer from that mobile phone.
Just need to test few html prints. Once I get the method, will do it further.
Also need an api that can list all the connected printers from that device.
(Connected via bluetooth or USB).
Prior experience in mobile printing will be appreciated.