Problem in Bluetooth client program

Question

Hello, i'm developing a J2ME application. It runs over a mobile phone with Bluetooth and it should connect with an BT Adapter. Mobile phone rol is client, and the adapter is the server.
I have a problem because when mobile phone executes the method public void serviceSearchCompleted(int transID, int respCode) , it stops and doesn't continue with the rest of the code...
I have developed the app. in this way: I finish the process of inquiry, then, i search for services, I find the services in the server, keep them in a vector, and, when the search is completed I call a method called startConnection() that tries to connect with the services found in the server.
However, I have a doubt: Should I call startConnection() when a service is found ( public void servicesDiscovered(int transID,ServiceRecord[] servRecord) ?
I see that when the program calls serviceSearchCompleted all is finished. waht can I do????
Here is the code: ( the inquiry methods are previous, but I don't post it because they run properly...)
public void servicesDiscovered(int transID,ServiceRecord[] servRecord) {
for(int i=0; i<servRecord.length; i++){
ServiceRecord service = servRecord;
servicios_encontrados.addElement(service);
try {
icon = Image.createImage("/icons/BT.jpg");
} catch (Exception e) {
icon = null;
myInfo.setStatus("Enviar ",servicios_encontrados.toString(),icon,AlertType.INFO);
GlucoMidlet.getInstance().showDisplayable(myInfo);
public void serviceSearchCompleted(int transID, int respCode) {
switch(respCode) {
case DiscoveryListener.SERVICE_SEARCH_COMPLETED: System.out.println("Busqueda completada "+"con normalidad");
try {
icon = Image.createImage("/icons/BT.jpg");
} catch (Exception e) {
icon = null;
myInfo.setStatus("Encontrados",servicios_encontrados.size()+"servicios encontrados",icon,AlertType.INFO);
GlucoMidlet.getInstance().showDisplayable(myInfo);
if(servicios_encontrados.size()!=0){
startConnection();
}else{
try {
icon = Image.createImage("/icons/BT.jpg");
} catch (Exception e) {
icon = null;
myInfo.setStatus("Enviar niveles de glucosa","No hay servicios",icon,AlertType.INFO);
GlucoMidlet.getInstance().showDisplayable(myInfo);
break;
case DiscoveryListener.SERVICE_SEARCH_TERMINATED:System.out.println("Busqueda cancelada");
break;
case DiscoveryListener.SERVICE_SEARCH_DEVICE_NOT_REACHABLE:System.out.println("Dispositivo no alcanzable");
break;
case DiscoveryListener.SERVICE_SEARCH_NO_RECORDS:System.out.println("No se encontraron registros"+" de servicio");
break;
case DiscoveryListener.SERVICE_SEARCH_ERROR:System.out.println("Error en la busqueda");
break;
public void startConnection(){
for (int i=servicios_encontrados.indexOf(servicios_encontrados.firstElement()); i<=servicios_encontrados.indexOf(servicios_encontrados.lastElement());i++ ){
btconnect((ServiceRecord)servicios_encontrados.elementAt(i));
public void btconnect (final ServiceRecord sr){
Thread th = new Thread() {
public void run() {
String url = sr.getConnectionURL(ServiceRecord.NOAUTHENTICATE_NOENCRYPT, false);
StreamConnection connection = null;
ByteArrayInputStream bais = null;
ByteArrayOutputStream baos = null;
try {
connection =(StreamConnection) Connector.open(url);
bais = (ByteArrayInputStream) connection.openInputStream();
baos = (ByteArrayOutputStream) connection.openOutputStream();
} catch(IOException exp){
ActionsController.notifyException("Error al transferir datos, IMPORTANTE.");}
send_command(connection,bais,baos,ID,url);
send_command(connection,bais,baos,GET_METER,url);
send_events(connection,bais,baos,GET_EVENTS);
cancelar(); //cancelamos las busquedas
/* } finally {
try {
if(bais != null)
bais.close();
if(baos != null)
baos.close();
if(connection != null)
connection.close();
} catch(IOException e) {}
th.start();

Answer 1

jaime_zgz
Just a thought.
The loop in your startConnection() sequentially attempts to connect to all discovered services. This may not be supported. One service may need to be disconnected in order to connect to another.
OK since each attempt is in a new Thread, it should throw a IOException for those attempts that fail on this account, but maybe you could simplify it and attempt to connect to just one service, and see what you get.
I have limited experience in BT, so don't trust me on everything :-) but ohterwise your code looks OK.
All the best, Darryl