HI!
My goal is to find network printers using jmdns
Following is the code I have written which does not work. I am new to
all this Pls. help me.
What exactly I want to do is to list all printers in list
box...Currently I am not filtering printers..
I am always getting exception... Here is my code
public class ListPrinters extends ListActivity {
public static JmDNS jmdns;
public static JmDNSImpl impl;
protected ServiceListener listener;
protected ServiceInfo info;
public ListView lv;
public ArrayList<String> PrinterList;
public int cancel =0;
public final static String TAG = "ListPrinter";
/** Called when the activity is first created. */
@Override
public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.list_printers);
showAllPrinters();
PrinterList = new ArrayList<String>();
PrinterList.add("First Node"); /// just for checking
setListAdapter(new ArrayAdapter<String>(this,
android.R.layout.simple_list_item_1 , PrinterList));
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();
if (jmdns != null)
{
ListPrinters.jmdns.removeServiceListener("_http._tcp.local.",
listener);
ListPrinters.jmdns.close();
ListPrinters.jmdns = null;
ListPrinters.impl = null;
}
}
});
this.listener = new ServiceListener() {
public void serviceAdded(ServiceEvent event) {
PrinterList.add("Service added : " +
event.getName() + "." +
event.getType());
Log.v(TAG,"Service added : " +
event.getName() + "." +
event.getType());
}
public void serviceRemoved(ServiceEvent event) {
PrinterList.add("Service removed : " +
event.getName() + "." +
event.getType());
Log.v(TAG,"Service removed : " +
event.getName() + "." +
event.getType());
}
public void serviceResolved(ServiceEvent event)
{
PrinterList.add("Service resolved: " +
event.getInfo());
Log.v(TAG,"Service resolved: " +
event.getInfo());
}
};
}
public void showAllPrinters()
{
try
{
ListPrinters.jmdns = JmDNS.create();
ListPrinters.jmdns.addServiceListener("_http._tcp.local.",
listener);
ListPrinters.impl = (JmDNSImpl)jmdns;
}
catch (IOException e)
{
e.printStackTrace();
}
}
}
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