Android app interfaces easily with Arduino, and other Android apps
This is untested by me but it has a number of nice traits:
- It is open source, so you can tinker with the code
- It has intents that your own Android app can use, so you do not need to tinker with the source code
- If I understand correctly it should work with a standard USB cable between the phone and an Arduino Uno R3. I have not checked this.
jeppsson/Arduino-Communicator - Let your own Android application receive data from Arduino by listening to the "primavera.arduino.intent.action.DATA_RECEIVED" intent.