Simple Android Bluetooth example to turn on/off radio and to view and connect with devices. Has associated code to connect to an Arduino. For a complete tutorial write-up, please see here: http://mcuhq.com/27/simple-android-bluetooth-application-with-arduino-example
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 can find the Arduino gist here: https://gist.github.com/bauerjj/424442ed08647a26652f9fe0736bfa28