A BlackBerry® device with a touch screen includes an accelerometer, which is designed to sense the orientation and acceleration of the BlackBerry device. When a BlackBerry device user moves the BlackBerry device, the accelerometer can sense the movement in 3-D space along the x, y, and z axis. A device user can change the orientation of the device which can change the display direction of a screen for a BlackBerry device application between portrait and landscape.
You can use the Accelerometer APIs in the net.rim.device.api.system package to respond to the orientation and acceleration of a BlackBerry device. For example, you can manipulate a game application to change the direction and speed of a moving object on the screen as a user moves and rotates the BlackBerry device at different speeds.
To download a sample application that demonstrates how to use the accelerometer, visit www.blackberry.com/go/accelerometersample. For more information about the sample application, visit www.blackberry.com/go/devguides to read the Accelerometer Sample Application Overview.