Android, Arduino, and Bluetooth


I want to control the Arduino with a processing app on my phone.
I have an HC-05 Bluetooth module and the Ketai Library.
How do I go about this?

If processing does not work what other options can I use?


PS: I'm a newbie.

You don't even need a processing app.
I used a Bluetooth terminal app.
As a simple example, I wrote an Arduino sketch to turn on/off two LEDs based on commands received from the Bluetooth terminal app.

There is a whole website dedicated to Processing.

If Android, Arduino and Bluetooth are your passion go to 1 Sheeld web site they have an Arduino bluetooth shield and an App to do many things both IOS and Android turns a phone into many shields. The board fits on an Uno and the App is open source and modifiable.