devicediscoverer.java

用于手机或其他支持蓝牙的设备上

import javax.bluetooth.*;
import java.util.*;

/**
 *
 * <p>Title: DeviceDiscoverer.java</p>
 *
 * <p>Description: A handly utility class used by BluetoothProbeMidlet used
 * to discover Bluetooth devices in the area.</p>
 *
 * <p>Copyright: Copyright (c) 2005</p>
 *
 * <p>By: Bruce Hopkins</p>
 *
 * @version 1.0
 */
public class DeviceDiscoverer implements DiscoveryListener {

	BluetoothProbeMidlet midlet;
	Vector remoteDevices = new Vector();

	DiscoveryAgent discoveryAgent;

        /**
         * A simple constructor that starts the Bluetooth device discovery
         * process according the JSR-82 API. In order for remote Bluetooth
         * devices to be found, then each Bluetooth device must be in
         * "discoverable" mode.
         * @param midlet BluetoothProbeMidlet
         */
        public DeviceDiscoverer(BluetoothProbeMidlet midlet) {
		this.midlet = midlet;
		try {
			LocalDevice localDevice = LocalDevice.getLocalDevice();
			discoveryAgent = localDevice.getDiscoveryAgent();

			midlet.updateStatus("Searching for Bluetooth devices in the vicinity...\n");
			discoveryAgent.startInquiry(DiscoveryAgent.GIAC, this);

		} catch(Exception e) {
			e.printStackTrace();
		}
	}

        /**
         * This method is called each time when a remote Bluetooth device
         * has been discovered.
         * @param remoteDevice RemoteDevice
         * @param cod DeviceClass
         */

	public void deviceDiscovered(RemoteDevice remoteDevice, DeviceClass cod) {

		try{
	            remoteDevices.addElement(remoteDevice);
			midlet.updateStatus("  found: "  + remoteDevice.getFriendlyName(true) );

		} catch(Exception e){
			e.printStackTrace();
		}

	}

        /**
         * This method is called when the Bluetooth device discovery process
         * has ended.
         * @param discType int
         */
        public void inquiryCompleted(int discType) {
		String inqStatus = null;

		if (discType == DiscoveryListener.INQUIRY_COMPLETED) {
			inqStatus = " \nInquiry completed";
		} else if (discType == DiscoveryListener.INQUIRY_TERMINATED) {
			inqStatus = "\nInquiry terminated";
		} else if (discType == DiscoveryListener.INQUIRY_ERROR) {
			inqStatus = "\nInquiry error";
		}

		midlet.updateStatus(inqStatus);

		midlet.form.addCommand(midlet.serviceSearchCommand);
		midlet.updateStatus("\nClick on the Search button to search for the all services available");

	}
        /**
         * This method is not used, but any implementation of DiscoveryListerer.java
         * must include these methods
         * @param transID int
         * @param servRecord ServiceRecord[]
         */
        public void servicesDiscovered(int transID, ServiceRecord[] servRecord){}

        /**
         * This method is not used, but any implementation of DiscoveryListerer.java
         * must include these methods
         * @param transID int
         * @param servRecord ServiceRecord[]
         */
       public void serviceSearchCompleted(int transID, int respCode) {}

}