btconnector.java

J2ME程序源代码。实现手机通过蓝牙技术连接到GPS Receiver

/*****************************************************************************

 Description: This class is used to seach for bluetooth devices and services.

 Created By: Oscar Vivall 2005-06-28
 
 @file        BTConnector.java

 COPYRIGHT All rights reserved Sony Ericsson Mobile Communications AB 2004.
 The software is the copyrighted work of Sony Ericsson Mobile Communications AB.
 The use of the software is subject to the terms of the end-user license 
 agreement which accompanies or is included with the software. The software is 
 provided "as is" and Sony Ericsson specifically disclaim any warranty or 
 condition whatsoever regarding merchantability or fitness for a specific 
 purpose, title or non-infringement. No warranty of any kind is made in 
 relation to the condition, suitability, availability, accuracy, reliability, 
 merchantability and/or non-infringement of the software provided herein.

*****************************************************************************/

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.bluetooth.*;
import java.util.*;

public class BTConnector implements Runnable, DiscoveryListener {

    private DiscoveryAgent discoveryAgent;
    private LocalDevice localDevice;

    private Vector devices = new Vector(); /* RemoteDevice */ 
    private String []deviceNames = new String[20];
    private int index = 0;

    private int []attrSet = {0x4321};
    private UUID []uuidSet = {new UUID(0x1101)};

    private int transactionID = 0;

    RemoteDevice remoteDevice;
    public static String url = "";

    private boolean doneSearching = false;
    private boolean isSearching = false;
    private boolean isServiceSearching = false;
    private boolean doneServiceSearching = false;

    public BTConnector(){
        Thread t = new Thread(this);
        t.start();
    }

    // reset the settings if a new device search is started.
    public void startSearch(){
        discoveryAgent.cancelServiceSearch(transactionID);
        
        Thread t = new Thread(this);
        t.start();
    }
    public Vector getDevices(){
        return devices;
    }

    public String[] getDeviceNames(){
        return deviceNames;
    }

    public int getSize(){
        return index;
    }

    public boolean doneSearchingDevices(){
        return doneSearching;
    }

    public boolean doneSearchingServices(){
        return doneServiceSearching;
    }

    public String getUrl(){
        return url;
    }

    // Connect to a specifyed index.
    public void connect(int i){
        discoveryAgent.cancelInquiry(this);
        remoteDevice = (RemoteDevice)devices.elementAt(i);
        
        synchronized(this){ // resume the thread.
            this.notify();
        }
    }

    public void run(){

        while(isSearching || isServiceSearching){
            Thread.yield();
        }

        devices = null;
        devices = new Vector();

        deviceNames = null;
        deviceNames = new String[20];

        index=0;
        remoteDevice = null;
        doneServiceSearching = false;
        doneSearching = false;
        url = "";

        try {
            // create/get a local device and discovery agent
            LocalDevice localDevice = LocalDevice.getLocalDevice();
            discoveryAgent = localDevice.getDiscoveryAgent();
            
            // start searching for remote devices. If a device is found the deviceDiscovered method will be called.
            isSearching = true;
            discoveryAgent.startInquiry(DiscoveryAgent.GIAC, this);

            // Pause the thread until the user selects another bt device to connect to.
            synchronized(this){
                try{
                    wait();
                }catch(Exception e){
                }
            }

            // Searsh for services on the remote bt device.
            isServiceSearching = true;
           transactionID = discoveryAgent.searchServices(null, uuidSet, remoteDevice, this);
        } catch (Exception e) {
            System.err.println("Can't initialize bluetooth: " + e);
        }
    }

    // Called if a remote btDevice is found
    public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod) {
 
        try{
            deviceNames[index] = btDevice.getFriendlyName(false); // Store the name of the device
System.out.println(index + " : " + deviceNames[index]);
            index++; // keep track on how many devices are found.
            devices.addElement(btDevice); // store the device
        }catch(Exception e){
            // If the btDevice is unknown, don't add it to the list.
            System.out.println("Failed to get FriendlyName");
        }
    }

    // When a connection is made and a service is found, get the connection string to that service.
    public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {
        url = servRecord[0].getConnectionURL(ServiceRecord.NOAUTHENTICATE_NOENCRYPT, true);
        System.out.println("url: " + url);
    }

    public void serviceSearchCompleted(int transID, int respCode) {
        System.out.println("serviceSearchCompleted");
        isServiceSearching = false;
        doneServiceSearching = true;
    }

    public void inquiryCompleted(int discType){
        System.out.println("inquiryCompleted");
        isSearching = false;
        doneSearching = true;
    }
}