SensorWrapper

//importok!

class EventListener implements SensorEventListener {
    private SensorEvent lastEvent;
    private int         sensorAccuracy;

    @Override
    public final void onAccuracyChanged(Sensor sensor, int accuracy) {
        sensorAccuracy = accuracy;
    }

    @Override
    public final void onSensorChanged(SensorEvent event) {
        lastEvent = event;
    }

    public int getAccuracy() {
        return sensorAccuracy;
    }

    public float getValue(int id) {
        return lastEvent.values[id];
    }
}

//

class SensorWrapper {
    private SensorManager   sensorManager;
    private Sensor          sensor;
    private EventListener   eventListener;

    SensorWrapper() {
        //Context-hez lehet kell az extends Activity? Erre azthiszem pont találtál már kódot
        sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);
        sensor = sensorManager.getDefaultSensor(...);

        eventListener = new EventListener();
        sensorManager.registerListener(eventListener, sensor, SensorManager.SENSOR_DELAY_NORMAL);
    }

    public float getValue(int id) {
        return sensor.getValue(id);
    }

    public int getAccuracy() {
        return sensor.getAccuracy();
    }
}