2011년 3월 10일 목요일

Android ACCELEROMETER sensor sample

public class ShakeActivity extends Activity implements SensorEventListener {

private static final int SHAKE_THRESHOLD = 800;
private long lastTime;
private float speed;
private float lastX;
private float lastY;
private float lastZ;
private float x, y, z;

private SensorManager sensorManager;
private Sensor accelerormeterSensor;

protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);

sensorManager = (SensorManager) getSystemService(SENSOR_SERVICE);
accelerormeterSensor = sensorManager
.getDefaultSensor(Sensor.TYPE_ACCELEROMETER);

}


@Override
public void onStart() {
super.onStart();

if (accelerormeterSensor != null)
sensorManager.registerListener(this, accelerormeterSensor,
SensorManager.SENSOR_DELAY_GAME);
}


@Override
public void onStop() {
super.onStop();

if (sensorManager != null)
sensorManager.unregisterListener(this);
}


@Override
public void onAccuracyChanged(Sensor sensor, int accuracy) {
}


@Override
public void onSensorChanged(SensorEvent event) {
if (event.sensor.getType() == Sensor.TYPE_ACCELEROMETER) {
long currentTime = System.currentTimeMillis();
long gabOfTime = (currentTime - lastTime);

if (gabOfTime > 100) {
lastTime = currentTime;


x = event.values[SensorManager.DATA_X];
y = event.values[SensorManager.DATA_Y];
z = event.values[SensorManager.DATA_Z];


speed = Math.abs(x + y + z - lastX - lastY - lastZ) / gabOfTime * 10000;

if (speed > SHAKE_THRESHOLD) {
Log.d("TAG","##################### shaked #####################");

}
lastX = event.values[SensorManager.DATA_X];
lastY = event.values[SensorManager.DATA_Y];
lastZ = event.values[SensorManager.DATA_Z];
}
}
}

}

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