Android DRIVER: android driver

Android DRIVER: android driver

1 SensorManager mSensorManager = (SensorManager) getSystemService (SENSOR_SERVICE );

Step 2: Use the getdefasensensor method of SensorManager to obtain the sensor Object of the specified type;

1 Sensor sensor = mSensorManager. getdefasensensor (Sensor. TYPE_GRAVITY); // gravity sensing

Step 3: implement the onSensorChanged and onAccuracyChanged methods of the SensorEventListener interface;

1 SensorEventListenerlsn = new SensorEventListener () {2 public void onSensorChanged (SensorEvent e) {3 // when the sensor value changes, will execute here 4} 5 6 public void onAccuracyChanged (Sensor s, int accuracy) {7 // when the Sensor's precision changes, will execute here 8} 9 };

Step 4: register the listener using the registerListener method of SensorManager to obtain the sensor change value.

1 mSensorManager.registerListener(lsn,sensor, SensorManager.SENSOR_DELAY_GAME);

Note: When the sensor value changes, the onSensorChanged method is called. When the sensor's precision changes, the onAccuracyChanged method is called.

 

Complete sample code:

 1 public class main extends Activity {     2     private float x, y, z;     3     protected void onCreate(Bundle savedInstanceState) {     4         super.onCreate(savedInstanceState);    5         SensorManager mSensorManager= (SensorManager) getSystemService(SENSOR_SERVICE);    6         Sensor sensor = mSensorManager.getDefaultSensor(Sensor.TYPE_GRAVITY);   7         SensorEventListener lsn = new SensorEventListener() {   8    9                     public void onSensorChanged(SensorEvent e) {  10                             System.out.println(e.value[0]);  11                             System.out.println(e.value[1]);  12                             System.out.println(e.value[2]);  13                      }  14                     public void onAccuracyChanged(Sensor s, int accuracy) {  15                     }      16                };  17                mSensorManager.registerListener(lsn, sensor, SensorManager.SENSOR_DELAY_GAME);  18 }