Android APP webviewclient with silent print use EPSON Ethernet (Lan) receipt printer

I have a website 100% fully functional. We are looking for someone who can do this job for us. 1) Android platform 2) create the simplest webviewclient 3) using EPSON receipt printer for silent print using a dedicated printer by IP (sometimes printing with one printer only and sometimes require 2 printers), without changing any existing web script. The challenge is as follow: 1) app must support alert, [login to view URL] and window.close. 2) MUST be silent print.