Hello All,
I am new to BB development. I come from a C# background and am having a heck of a time learning J2ME. I am developing an app that connects to my .net webservice using ksoap2. I have no issues with that part, I can communicate fine with the webservice if it is just one screen. The issue I have is that when I navigate from the first screen to the second screen, my list does not get populated by the webservice. I'm thinking that it might be a threading issue, but since this is all new to me I don't know. Please see my code below. Any help would be greatly appreciated. Also, the code below works fine in the emulator, but ceases to work when I install it on my 8830. Thanks.
Tracker.java code:
Code:
public class Tracker extends UiApplication
{
public static void main(String[] args)
{
Tracker theApp = new Tracker();
theApp.enterEventDispatcher();
}
public Tracker()
{
pushScreen(new TrackerScreen());
}
}
final class TrackerScreen extends MainScreen
{
private ListField myList;
private ListCallback myCallback;
private class ListCallback implements ListFieldCallback
{
private Vector listElements = new Vector();
public void drawListRow(ListField list, Graphics g, int index, int y, int w)
{
String text = (String)listElements.elementAt(index);
g.drawText(text, 0, y, 0, w);
}
public Object get(ListField list, int index)
{
return listElements.elementAt(index);
}
public int indexOfList(ListField list, String p, int s)
{
return listElements.indexOf(p, s);
}
public int getPreferredWidth(ListField list)
{
return Graphics.getScreenWidth();
}
public void insert(String toInsert, int index)
{
listElements.addElement(toInsert);
}
public void erase()
{
listElements.removeAllElements();
}
}
public TrackerScreen()
{
super(DEFAULT_MENU | DEFAULT_CLOSE);
setTitle(new LabelField("Call Purpose", LabelField.ELLIPSIS | LabelField.USE_ALL_WIDTH));
DataThread mt = new DataThread();
Vector lvm = new Vector();
lvm = mt.GetList();
myList = new ListField();
myCallback = new ListCallback();
myList.setCallback(myCallback);
for (int c=0; c < lvm.size(); c++)
{
myList.insert(c);
myCallback.insert(lvm.elementAt(c).toString(), c);
}
add(myList);
}
public boolean onClose()
{
System.exit(0);
return true;
}
public boolean onEnter()
{
int myIndex = myList.getSelectedIndex();
String mySelection = String.valueOf(myCallback.get(myList, myIndex));
Dialog.alert("You chose: " + mySelection);// + " - " + mt.GetUser());
Ui.getUiEngine().pushScreen(new TrackerScreen2());
return true;
}
public boolean keyChar(char key, int status, int time) {
boolean retval = false;
switch (key) {
case Characters.ESCAPE:
onClose();
retval = true;
break;
case Characters.ENTER:
onEnter();
retval = true;
break;
}
return retval;
}
}
class TrackerScreen2 extends MainScreen
{
private ListField myList;
private ListCallback myCallback;
private class ListCallback implements ListFieldCallback
{
private Vector listElements = new Vector();
public void drawListRow(ListField list, Graphics g, int index, int y, int w)
{
String text = (String)listElements.elementAt(index);
g.drawText(text, 0, y, 0, w);
}
public Object get(ListField list, int index)
{
return listElements.elementAt(index);
}
public int indexOfList(ListField list, String p, int s)
{
return listElements.indexOf(p, s);
}
public int getPreferredWidth(ListField list)
{
return Graphics.getScreenWidth();
}
public void insert(String toInsert, int index)
{
listElements.addElement(toInsert);
}
public void erase()
{
listElements.removeAllElements();
}
}
public TrackerScreen2()
{
super(DEFAULT_MENU | DEFAULT_CLOSE);
setTitle(new LabelField("Contact List", LabelField.ELLIPSIS | LabelField.USE_ALL_WIDTH));
DataThread mt = new DataThread();
Vector lvm = new Vector();
lvm = mt.GetContactList();
myList = new ListField();
myCallback = new ListCallback();
myList.setCallback(myCallback);
for (int c=0; c < lvm.size(); c++)
{
myList.insert(c);
myCallback.insert(lvm.elementAt(c).toString(), c);
}
add(myList);
}
public boolean onClose()
{
System.exit(0);
return true;
}
public boolean onEnter()
{
int myIndex = myList.getSelectedIndex();
String mySelection = String.valueOf(myCallback.get(myList, myIndex));
Dialog.alert("You chose: " + mySelection );
return true;
}
public boolean keyChar(char key, int status, int time) {
boolean retval = false;
switch (key) {
case Characters.ESCAPE:
onClose();
retval = true;
break;
case Characters.ENTER:
onEnter();
retval = true;
break;
}
return retval;
}
}
DataThread.java code:
Code:
class DataThread extends Thread{
DataThread() { }
public String GetUser() {
SoapObject rpc = new SoapObject("####", "HelloWorld");
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.bodyOut = rpc;
envelope.dotNet = true;
envelope.encodingStyle = SoapSerializationEnvelope.XSD;
HttpTransport ht = new HttpTransport("####/ACTrack.asmx");
ht.debug = true;
try{
ht.call("####/HelloWorld", envelope);
String result = (envelope.getResponse()).toString();
return "result: " + result;
}
catch (org.xmlpull.v1.XmlPullParserException ex2){
return ex2.toString();
}
catch (Exception ex){
return "ex: " + ex.toString();
}
}
public String SetUser(String strUser){
SoapObject myObject = new SoapObject("####", "GimmeData");
myObject.addProperty("data", strUser);
SoapSerializationEnvelope env = new SoapSerializationEnvelope(SoapEnvelope.VER11);
env.bodyOut = myObject;
env.dotNet = true;
env.encodingStyle = SoapSerializationEnvelope.XSD;
HttpTransport ht = new HttpTransport("####/ACTrack.asmx");
ht.debug = true;
//env.setOutputSoapObject(myObject);
try{
ht.call("####/GimmeData",env);
String result = (env.getResponse()).toString();
return result;
}
catch (Exception ex){
return ex.toString();
}
}
public Vector GetList() {
SoapObject rpc = new SoapObject("####", "sendList");
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.bodyOut = rpc;
envelope.dotNet = true;
envelope.encodingStyle = SoapSerializationEnvelope.XSD;
HttpTransport ht = new HttpTransport("####/ACTrack.asmx");
ht.debug = true;
String result = "";
Vector vim = new Vector();
try{
ht.call("####/sendList", envelope);
vim = (Vector) envelope.getResponse();
}
catch (org.xmlpull.v1.XmlPullParserException ex2){
//return null;
}
catch (Exception ex){
//return null;
}
return vim;
}
public Vector GetContactList() {
SoapObject rpc = new SoapObject("####", "sendContactList");
SoapSerializationEnvelope envelope = new SoapSerializationEnvelope(SoapEnvelope.VER11);
envelope.bodyOut = rpc;
envelope.dotNet = true;
envelope.encodingStyle = SoapSerializationEnvelope.XSD;
HttpTransport ht = new HttpTransport("####/ACTrack.asmx");
ht.debug = true;
String result = "";
Vector vim = new Vector();
try{
ht.call("####/sendContactList", envelope);
//result = (envelope.getResponse()).toString();
vim = (Vector) envelope.getResponse();
//result = vim.elementAt(1).toString();
}
catch (org.xmlpull.v1.XmlPullParserException ex2){
//return null;
}
catch (Exception ex){
//return null;
}
return vim;
}
} 
Newbie Help 
