[durban1234]

Hi Guys!

I'm trying to write a simple device&service discoverer midlet, just for fun. On the Nokia J2ME emulator with bluetooth works fine: 2 emus see each other. Compliled by J2SE1.4.2 with WTK2.0, tested on emus, uploaded by Ir as JAR, installed on MMC, loading failed with an alert:
App. closed
jes-xxx-javax.microedition.lcdui1@1...
Please help me, the DeviceControl usage (lights, vibra) also failed with this jes* like messages. What is this message?

The Source:
<source>
import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;
import java.lang.*;
import java.io.*;
import java.util.*;
import javax.microedition.io.*;
import javax.bluetooth.*;
public class UDSMidlet
extends MIDlet
implements CommandListener, ItemCommandListener,DiscoveryListener{

private Display display;
private Form mainForm;
private StringItem message;
private final static Command CMD_GO = new Command("Go", Command.ITEM, 1);
private final static Command CMD_PRESS = new Command("Press", Command.ITEM, 1);
private final static Command CMD_EXIT = new Command("Exit", Command.EXIT, 1);
// bt common
LocalDevice local = null;
DeviceClass deviceClass = null;
DiscoveryAgent agent;
ServiceRecord record;
Vector remoteDevices = new Vector();
Hashtable deviceClassesByRemoteDevices = new Hashtable();
Vector transIDs = new Vector();
Hashtable serviceRecordByTransIDs = new Hashtable();
public static long UUID_SDP = 0x0001;
public static long UUID_RFCOMM = 0x0003;
public static long UUID_OBEX = 0x0008;
public static long UUID_HTTP = 0x000C;
public static long UUID_L2CAP = 0x0100;
public static long UUID_BNEP = 0x000F;
public static long UUID_Serial_Port = 0x1101;
public static long UUID_ServiceDiscoveryServerServiceClassID = 0x1000;
public static long UUID_BrowseGroupDescriptorServiceClassID = 0x1001;
public static long UUID_PublicBrowseGroup = 0x1002;
public static long UUID_OBEX_Object_Push_Profile = 0x1105;
public static long UUID_OBEX_File_Transfer_Profile = 0x1106;
public static long UUID_Personal_Area_Networking_User = 0x1115;
public static long UUID_Network_Access_Point = 0x1116;
public static long UUID_Group_Network = 0x1117;
public static long[] UUIDS = new long[] {
UUID_SDP,UUID_RFCOMM,UUID_OBEX,UUID_HTTP,UUID_L2CAP,UUID_BNEP,
UUID_Serial_Port,UUID_ServiceDiscoveryServerServiceClassID,
UUID_BrowseGroupDescriptorServiceClassID,UUID_PublicBrowseGroup,
UUID_OBEX_Object_Push_Profile,UUID_OBEX_File_Transfer_Profile,
UUID_Personal_Area_Networking_User,UUID_Network_Access_Point,
UUID_Group_Network
};
/**
* Signals the MIDlet to start and enter the Active state.
*/
protected void startApp() {
display = Display.getDisplay(this);
//bt init
try {
local = LocalDevice.getLocalDevice();
agent = local.getDiscoveryAgent();
deviceClass = local.getDeviceClass();
} catch (BluetoothStateException e) {
//System.out.println("Failed to start Bluetooth System");
//System.out.println("\tBluetoothStateException: " + e.getMessage());
}

mainForm = new Form("UDS Midlet");
mainForm.append(getBtInfo());
Item item = null;

item = new StringItem("k¨¦kfog indulhat", "", Item.BUTTON);
item.setDefaultCommand(CMD_GO);
item.setItemCommandListener(this);
mainForm.append(item);

message = new StringItem("", "", Item.PLAIN);
mainForm.append(message);

mainForm.addCommand(CMD_EXIT);
mainForm.setCommandListener(this);
display.setCurrent(mainForm);
}

public String getBtInfo() {
return "BluetoothAddress:"+local.getBluetoothAddress() + "\n" +
"FriendlyName:"+local.getFriendlyName() + "\n" +
codToString(deviceClass) + "\n";
}
public String respCodeToString (int respCode) {
if (respCode == SERVICE_SEARCH_COMPLETED)
return "SERVICE_SEARCH_COMPLETED";
else if (respCode == SERVICE_SEARCH_TERMINATED)
return "SERVICE_SEARCH_TERMINATED";
else if (respCode == SERVICE_SEARCH_ERROR)
return "SERVICE_SEARCH_ERROR";
else if (respCode == SERVICE_SEARCH_NO_RECORDS)
return "SERVICE_SEARCH_NO_RECORDS";
else if (respCode == SERVICE_SEARCH_DEVICE_NOT_REACHABLE)
return "SERVICE_SEARCH_DEVICE_NOT_REACHABLE";
else
return "UNKNOWN";
}
public String discTypeToString (int discType) {
if (discType == INQUIRY_COMPLETED)
return "INQUIRY_COMPLETED";
else if (discType == INQUIRY_TERMINATED)
return "INQUIRY_TERMINATED";
else if (discType == INQUIRY_ERROR)
return "INQUIRY_ERROR";
else
return "UNKNOWN";
}
public String remoteDevicesToString () {
StringBuffer sb = new StringBuffer();
for(int i = 0; i<remoteDevices.size();i++) {
RemoteDevice btDevice = (RemoteDevice)remoteDevices.elementAt(i);
sb.append("BluetoothAddress:");
sb.append( btDevice.getBluetoothAddress() );
sb.append("\nFriendlyName:");
try {
sb.append( btDevice.getFriendlyName(false) );
} catch (IOException io) {
sb.append( io.toString() );
}
String cod = (String)deviceClassesByRemoteDevices.get(btDevice.getBluetoothAddress());
sb.append("\nDeviceClass:");
sb.append( cod + "\n");
}
return sb.toString();
}

public String serviceRecordsToString (ServiceRecord[] servRecord) {
StringBuffer sb = new StringBuffer();
for(int i = 0;servRecord!=null && i<servRecord.length;i++) {
ServiceRecord servRec = servRecord[i];
if (servRec != null) {
int[] ids = servRec.getAttributeIDs();
for(int j = 0;ids!=null && j<ids.length;j++) {
DataElement elem = servRec.getAttributeValue(ids[j]);
sb.append(ids[j]);
sb.append(":");
sb.append( (elem!=null? elem.getValue() : "null") );
}
}
}
return sb.toString();
}

public String codToString(DeviceClass cod) {
return cod.getMajorDeviceClass()
+"/"+cod.getMinorDeviceClass()
+"/"+cod.getServiceClasses();
}
//Called when a device is found during an inquiry.
public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod) {
//System.out.println("BtDevice:"+btDevice);
//System.out.println("DeviceClass:"+codToString(cod));
if (!remoteDevices.contains(btDevice)) {
remoteDevices.addElement(btDevice);
}
deviceClassesByRemoteDevices.put(btDevice.getBluetoothAddress(),codToString(cod));
}
//Called when an inquiry is completed.
public void inquiryCompleted(int discType) {
//System.out.println("inquiry is completed");
message.setText(
"\n" + discTypeToString(discType)
+ "\n" + remoteDevicesToString()
);
synchronized (this) {
this.notifyAll();
}
}
//Called when service(s) are found during a service search.
public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {
//System.out.println("transID:"+transID);
//System.out.println("ServiceRecord:"+(servRecord != null ? servRecord.toString() : "null"));
Integer TransID = new Integer(transID);
if (!transIDs.contains(TransID)) {
//transIDs.addElement(TransID);
}
if (servRecord != null) {
serviceRecordByTransIDs.put(TransID, servRecord);
} else {
//System.out.println("ServiceRecord is null");
}
}
//Called when a service search is completed or was terminated because of an error.
public void serviceSearchCompleted(int transID, int respCode) {
message.setText(
"\n" + respCodeToString(respCode)
+ "\n" + serviceRecordsToString((ServiceRecord[])serviceRecordByTransIDs.get(new Integer(transID)))
);
synchronized (this) {
this.notifyAll();
}
}

public void commandAction(Command c, Item item) {
if (c == CMD_GO) {
try {
remoteDevices.removeAllElements();
deviceClassesByRemoteDevices.clear();
transIDs.removeAllElements();
serviceRecordByTransIDs.clear();
//System.out.println("device discovery start");
agent.startInquiry(
DiscoveryAgent.GIAC, //General/Unlimited Inquiry Access Code
this
);
synchronized (this) {
try {
this.wait();
} catch (Exception e) {
}
}
//System.out.println("device discovery end");
UUID[] uuidSet = new UUID[UUIDS.length];
for (int z=0;z<UUIDS.length;z++) {
uuidSet[z] = new UUID(UUIDS[z]);
}
//System.out.println("service discovery start");
for(int i = 0; i<remoteDevices.size();i++) {
RemoteDevice btDevice = (RemoteDevice)remoteDevices.elementAt(i);
try {
int transID = agent.searchServices(new int[0], // only default attributes
uuidSet,
btDevice,
this);
//System.out.println("starting service search " + transID);
transIDs.addElement(new Integer(transID));
synchronized (this) {
try {
this.wait();
} catch (Exception e) {
}
}
//System.out.println("service search ended " + transID);
} catch (javax.bluetooth.BluetoothStateException btEx) {
//System.out.println("Failed using Bluetooth");
//System.out.println("\t"+btEx.toString()+"\n");
}
}
//System.out.println("service discovery end");
} catch (Exception e) {
//System.out.println("Failed using Bluetooth");
//System.out.println("\t"+e.toString()+"\n");
}
}
}

public void commandAction(Command c, Displayable d) {
destroyApp(false);
notifyDestroyed();
}

/**
* Signals the MIDlet to terminate and enter the Destroyed state.
*/
protected void destroyApp(boolean unconditional) {
}

/**
* Signals the MIDlet to stop and enter the Paused state.
*/
protected void pauseApp() {
}
}
</source>

Thank You for helping,
durban

[fgd00]

Hi, I've been having the same problem as you.... The problem seems to be in the device discovery: Works perfectly on the Emus, but this strange error message when loading the program on real device. Any developpments since then??

[kufa_reason]

You shouldn't block the user interface: you call a start inquiry in the commandAction, and you have this:

> synchronized (this) {
> try {
> this.wait();
> } catch (Exception e) {
> }

which will block the user interface...

/kUfa

[fgd00]

kufa,

Thanks, I tried that, but the program still doesn't even load.... I haven't even got the time to call the CommandAction function......

The Error is:

App. closed
jes-xxx-javax.microedition.lcdui1@1...

[sevics]

Hi,

I know it has been a while since you have posted this. I had the same problem couple months ago. At the end, when I built the jar file without including the blootooth library, it worked. So I ended up having two built files: 1 for emulator, 1 for the device itself.

I hope this helps...