Hi there.. I want to build an app that works on the accelrometer, gyroscope and gps of the android phone. I want to develop an app that when a mobile is placed on a bike and the bike meets with an accident, the sudden changes in the sensors will allow the phone to send a gps location and message of the user to a particular number.. I am a newbie in android and have not much idea about android developing and i know the question i posted above is a bit high level. But anybody can be kind enough to tell me how to proceed with the above kind of project.. Also links to basic android programming will help.. Thanks for your time..