I was using involt(link to involt github page) to communicate with arduino
What communication methods are supported? Serial - desktop Bluetooth (2.0/classic) - desktop and mobile
What you need to define is:How much data? How many bytes in what period of time?How far?With what reliability?
Dont' yah just luv those websites that are all pretty pictures and no useful content....R
If you somehow find any way to send serial data from android to arduino through js please let me know.