How To : Detect if the BlackBerry smartphone is holstered or flipped

The Sensor API allows third-party applications to query the existence and states of BlackBerry smartphone sensors (for example, holster or flip). This API also supports registration to a SensorListener that can receive updates for specified sensor(s).

Note: The relevant classes added to BlackBerry® Java® Development Environment (BlackBerry JDE) 4.6 are as follows:

• net.rim.device.api.system.Sensor
• net.rim.device.api.system.SensorListener

The following code snippet shows how to receive sensor updates for both flip and holster events using the SensorListener:

public class SensorDemo extends Application implements SensorListener { … public SensorDemo() { Sensor.addListener(this,this,Sensor.HOLSTER | Sensor.FLIP); System.exit(0); } public void onSensorUpdate(int sensorId, int update) { switch(sensorId) { case Sensor.HOLSTER: System.out.println("Received an Holster update!"); switch(update){ case Sensor.STATE_IN_HOLSTER: System.out.println("Device Holstered!"); break; case Sensor.STATE_OUT_OF_HOLSTER: System.out.println("Device out of Holster!"); break; default: System.out.println("Unknown Holster update"); } break; case Sensor.FLIP: System.out.println("Received a Flip update!"); switch(update){ case Sensor.STATE_FLIP_OPEN: System.out.println("Device Flip opened!"); break; case Sensor.STATE_FLIP_CLOSED: System.out.println("Device Flip closed!"); break; default: System.out.println("Unknown Flip update"); } break; default; } } public static void main(String[] args) { new SensorDemo().enterEventDispatcher(); }