yo quieroTextViews para mostrar las lecturas de los sensores en unFragment. Al intentar inicializar elSensorManager elgetSystemServices no está definido en elFragment, dice eclipse. ¿Por qué y cómo solucionarlo?

Fragmento

public class FragSensors extends Fragment {

private TextView accXTv, accYTv, accZTv;
private SensorManager sensorManager;

@Override
public View onCreateView(LayoutInflater inflater, ViewGroup container,
        Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    View v = inflater.inflate(R.layout.frag_sensors, container, false);
    accXTv = (TextView) v.findViewById(R.id.accXValue);
    accYTv = (TextView) v.findViewById(R.id.accYValue);
    accZTv = (TextView) v.findViewById(R.id.accZValue);
    return v;
}

@Override
public void onActivityCreated(Bundle savedInstanceState) {
    // TODO Auto-generated method stub
    super.onActivityCreated(savedInstanceState);
    sensorManager = (SensorManager) getSystemService(Context.SENSOR_SERVICE);

}

private final SensorEventListener mSensorListener = new SensorEventListener() {

    @Override
    public void onSensorChanged(SensorEvent arg0) {
        // TODO Auto-generated method stub

    }

    @Override
    public void onAccuracyChanged(Sensor arg0, int arg1) {
        // TODO Auto-generated method stub

    }
};

}