Bonjour implementation on Android

I am trying to implement bonjour/zero conf on my android app. I am using jmDns library for searching the all the available devices. Here is the code that I am using for searching the devices in the same network:

public class ListDevices extends ListActivity {
    JmDNS jmdns;
    JmDNSImpl impl;
    MulticastLock lock;
    protected ServiceListener listener;
    protected ServiceInfo info;
    public ListView lv;
    public ArrayList<String> deviceList;
    public int cancel = 0;
    public final static String TAG = "ListDevices";

    /** Called when the activity is first created. */
    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.main);

        deviceList = new ArrayList<String>();
        showAllPrinters();

        setListAdapter(new ArrayAdapter<String>(this,
                android.R.layout.simple_list_item_1, deviceList));

        lv = getListView();
        lv.setTextFilterEnabled(true);

        lv.setOnItemClickListener(new OnItemClickListener() {
            public void onItemClick(AdapterView<?> parent, View view,
                    int position, long id) {
                // When clicked, show a toast with the TextView text
                Toast.makeText(getApplicationContext(),
                       ((TextView) view).getText(), Toast.LENGTH_SHORT).show();
            }
        });
        this.listener = new ServiceListener() {
            public void serviceAdded(ServiceEvent event) {
                deviceList.add("Service added   : " + event.getName() + "."
                        + event.getType());
                Log.v(TAG, "Service added   : " + event.getName() + "."
                        + event.getType());
            }

            public void serviceRemoved(ServiceEvent event) {
                deviceList.add("Service removed : " + event.getName() + "."
                        + event.getType());