I\'ve modified the bluetooth chat example from the SDK demos to be able to control an arduino powered bluetooth LED matrix. Using the chat program, I can send messages to the
to add to @alex.veprix to the point (and correct I must mention) answer, if you're building for devices with API level 13 or higher, don't forget to add ScreenSize attribute in the following way: android:configChanges="orientation|screenSize"
Details here: http://developer.android.com/guide/topics/manifest/activity-element.html