A simple Android bluetooth example to turn on/off the radio and to view and connect with other devices. It has associated embedded firmware code to connect to an Arduino to test the bi-directional data stream.
For a complete tutorial write-up, please see here:
This is a simple demo app that creates buttons to toggle ON/OFF the bluetooth radio, view connected devices, and to discover new bluetooth enabled devices. A checkbox and status strings provide functionality to communicate with an embedded microcontroller such as an Arduino. You don't necessarily need to connect an Arduino to still have a functioning phone application. The connected device MUST abide by the Serial Port Profile (SPP). Other complex profiles are not supported with this example and will fail to connect.
Please submit all issues to the github tracker. Pull requests are also encouraged. General comments can be left either inside github or at mcuhq.com.