在碎片中，如何停止ZXing扫描仪的摄像头？

public class MyFragment extends Fragment {
    private BarcodeView barcodeView;

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container, Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_layout, container, false);
        barcodeView = view.findViewById(R.id.barcode_view);
        return view;
    }

    @Override
    public void onResume() {
        super.onResume();
        barcodeView.resume();
    }

    @Override
    public void onPause() {
        super.onPause();
        barcodeView.pause();
    }
}