Reading data from an android on my arduino

Hi guys ive installed an app from this linkhttps://code.google.com/p/android-arduino-object-tracking-robot/

Now ive got the app working but im not sure how a persons reads the data via usb on my arduino.

I know they have arduino code there(that i dont understand) but i want to start simple and just serial print the data thats coming in.

Anybody if you could give me some direction that would be great.

Thanks Mathys

Undermentioned: I know they have arduino code there(that i dont understand) but i want to start simple and just serial print the data thats coming in.

That sounds like you want someone her to do YOUR homework. Perhaps you can get advice from the website where you got the software.

Failing that I suspect you will need to educate yourself to the point where you do understand the code.

...R