Hello,
I am trying to write a program in J2SE which will use Bluetooth and act as a server to wait for connections, and then send a file to any device that connects.
I am using ubuntu linux, and I am using the NetBeans IDE.
I am having a lot of trouble trying to create this program, and after hours of researching the bluetooth API's for linux, and trying all of them (AvetanaBT, jBlueZ, BlueZ, BlueCove) I can not seem to get any basic connectivity with my bluetooth dongle.
I haven't even got as far as listening for devices or discovering bluetooth devices.
The example code I am trying to run is this:
import java.io.IOException;
import java.util.Vector;
import javax.bluetooth.DeviceClass;
import javax.bluetooth.DiscoveryAgent;
import javax.bluetooth.DiscoveryListener;
import javax.bluetooth.LocalDevice;
import javax.bluetooth.RemoteDevice;
import javax.bluetooth.ServiceRecord;
/**
* Class that discovers all bluetooth devices in the neighbourhood
* and displays their name and bluetooth address.
*/
public class BluetoothDeviceDiscovery implements DiscoveryListener{
//object used for waiting
private static Object lock=new Object();
//vector containing the devices discovered
private static Vector vecDevices=new Vector();
//main method of the application
public static void main(String[] args) throws IOException {
//create an instance of this class
BluetoothDeviceDiscovery bluetoothDeviceDiscovery=new BluetoothDeviceDiscovery();
//display local device address and name
LocalDevice localDevice = LocalDevice.getLocalDevice();
System.out.println("Address: "+localDevice.getBluetoothAddress());
System.out.println("Name: "+localDevice.getFriendlyName());
//find devices
DiscoveryAgent agent = localDevice.getDiscoveryAgent();
System.out.println("Starting device inquiry...");
agent.startInquiry(DiscoveryAgent.GIAC, bluetoothDeviceDiscovery);
try {
synchronized(lock){
lock.wait();
}
}
catch (InterruptedException e) {
e.printStackTrace();
}
System.out.println("Device Inquiry Completed. ");
//print all devices in vecDevices
int deviceCount=vecDevices.size();
if(deviceCount <= 0){
System.out.println("No Devices Found .");
}
else{
//print bluetooth device addresses and names in the format [ No. address (name) ]
System.out.println("Bluetooth Devices: ");
for (int i = 0; i <deviceCount; i++) {
RemoteDevice remoteDevice=(RemoteDevice)vecDevices.elementAt(i);
System.out.println((i+1)+". "+remoteDevice.getBluetoothAddress()+" ("+remoteDevice.getFriendlyName(true)+")");
}
}
}//end main
//methods of DiscoveryListener
/**
* This call back method will be called for each discovered bluetooth devices.
*/
public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod) {
System.out.println("Device discovered: "+btDevice.getBluetoothAddress());
//add the device to the vector
if(!vecDevices.contains(btDevice)){
vecDevices.addElement(btDevice);
}
}
//no need to implement this method since services are not being discovered
public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {
}
//no need to implement this method since services are not being discovered
public void serviceSearchCompleted(int transID, int respCode) {
}
/**
* This callback method will be called when the device discovery is
* completed.
*/
public void inquiryCompleted(int discType) {
synchronized(lock){
lock.notify();
}
switch (discType) {
case DiscoveryListener.INQUIRY_COMPLETED :
System.out.println("INQUIRY_COMPLETED");
break;
case DiscoveryListener.INQUIRY_TERMINATED :
System.out.println("INQUIRY_TERMINATED");
break;
case DiscoveryListener.INQUIRY_ERROR :
System.out.println("INQUIRY_ERROR");
break;
default :
System.out.println("Unknown Response Code");
break;
}
}//end method
}//end class
And when I run this program I get the following error:
Exception in thread "main" javax.bluetooth.BluetoothStateException: java.lang.NoClassDefFoundError: com/sun/kvem/jsr082/bluetooth/DiscoveryAgentImpl
at javax.bluetooth.LocalDevice.getLocalDevice(LocalDevice.java:100)
at BluetoothDeviceDiscovery.main(BluetoothDeviceDiscovery.java:66)
Java Result: 1
I would really appreciate if someone could help me out, by pointing me in the right direction or giving me some advice on what API's to use, or some good books which explain how to use Bluetooth API with J2SE.
Thank you.
