send string to from arduino to android

Hello, how can i send the string "ok" from the Arduino board to the android phone????

any heelp???

How are the arduino and android connected?

they are connected through a usb cable

Previous post that might have info.

https://www.google.com/search?hl=en&as_q=android&as_epq=&as_oq=&as_eq=&as_nlo=&as_nhi=&lr=&cr=&as_qdr=all&as_sitesearch=http%3A%2F%2Fforum.arduino.cc%2Findex&as_occt=any&safe=images&tbs=&as_filetype=&as_rights=