Android(安卓)加速器(accelerometer) 使用,判断设备移动

public class Test extends Activity implements SensorEventListener{ public static float swRoll; public static float swPitch; public static float swAzimuth; public static SensorManager mSensorManager; public static Sensor accelerometer; public static Sensor magnetometer; public static float[] mAccelerometer = null; public static float[] mGeomagnetic = null; public void onAccuracyChanged(Sensor sensor, int accuracy) { } @Override public void onSensorChanged(SensorEvent event) {   // onSensorChanged gets called for each sensor so we have to remember the values   if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {     mAccelerometer = event.values;   }   if (event.sensor.getType() == Sensor.TYPE_MAGNETIC_FIELD) {     mGeomagnetic = event.values;   }   if (mAccelerometer != null && mGeomagnetic != null) {     float R[] = new float[9];     float I[] = new float[9];     boolean success = SensorManager.getRotationMatrix(R, I, mAccelerometer, mGeomagnetic);     if (success) {       float orientation[] = new float[3];       SensorManager.getOrientation(R, orientation);       // at this point, orientation contains the azimuth(direction), pitch and roll values.        double azimuth = 180 * orientation[0] / Math.PI;        double pitch = 180 * orientation[1] / Math.PI;        double roll = 180 * orientation[2] / Math.PI;     }   } } @Override protected void onCreate(Bundle savedInstanceState) {   super.onCreate(savedInstanceState);   mSensorManager = (SensorManager)getSystemService(SENSOR_SERVICE);   accelerometer = mSensorManager.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);   magnetometer = mSensorManager.getDefaultSensor(Sensor.TYPE_MAGNETIC_FIELD); } @Override protected void onResume() {   super.onResume();   mSensorManager.registerListener(this, accelerometer, SensorManager.SENSOR_DELAY_GAME);   mSensorManager.registerListener(this, magnetometer, SensorManager.SENSOR_DELAY_GAME); } @Override protected void onPause() {   super.onPause();   mSensorManager.unregisterListener(this, accelerometer);   mSensorManager.unregisterListener(this, magnetometer); }
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