I don't know why, but i have tried many codes and every reading that I am able to get in the arduino from android is "-1". Also, when I send more than one number/letter I can get some readings. Any help would be apreciated.
You might find the following background notes useful
http://homepages.ihug.com.au/~npyner/Arduino/GUIDE_2BT.pdf
http://homepages.ihug.com.au/~npyner/Arduino/BT_2_WAY.ino