listallbtdevices.java

一个关于j2me下的搜索所有周围蓝牙设备的代码

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;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.StringItem;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

public class ListAllBTDevices extends MIDlet {
	private Display display = null;
	
	public Form form = new Form("搜索全部的蓝牙设备");
	//搜索时显示搜索到的设备数量
	StringItem siMsg = new StringItem("", null);
	
	public ListAllBTDevices() {
		super();
		// TODO 自动生成构造函数存根
	}

	protected void startApp() throws MIDletStateChangeException {
		display = Display.getDisplay(this);
		display.setCurrent(form);
		
        try {
            LocalDevice localDevice = LocalDevice.getLocalDevice();
            DiscoveryAgent discoveryAgent = localDevice.getDiscoveryAgent();
            discoveryAgent.startInquiry(DiscoveryAgent.GIAC, 
    				new MyDiscoveryListener(this));
            form.append("开始搜索...\n");
            System.out.println("开始搜索...\n");
            form.append(siMsg);
        } catch (Exception e) {
            System.out.println(e);
        }
	}

	protected void pauseApp() {
		// TODO 自动生成方法存根
	}

	protected void destroyApp(boolean arg0)
		throws MIDletStateChangeException {
		// TODO 自动生成方法存根
	}
}


class MyDiscoveryListener implements DiscoveryListener {
	//用于保存搜索到的设备
	Vector devices = new Vector();
	ListAllBTDevices midlet;
	
	public MyDiscoveryListener(ListAllBTDevices midlet) {
		this.midlet = midlet;
	}
	
	public void deviceDiscovered(RemoteDevice btDevice, DeviceClass cod) {
		devices.addElement(btDevice);
		midlet.siMsg.setText("搜索到设备数：" + devices.size()+"\n");
		System.out.println("搜索到设备数: " + devices.size()+"\n");
		
	}
	
	public void inquiryCompleted(int discType) {
		midlet.form.append("查询完毕\n");
		System.out.println("查询完.\n");
		showDevices();
	}
	
	public void servicesDiscovered(int transID, ServiceRecord[] servRecord) {
	}
	
	public void serviceSearchCompleted(int transID, int responseCode) {
	}
	
	void showDevices() {
		midlet.form.append("输出搜索结果\n\n");
		System.out.println("输出搜索结果\n\n");
		for (int i=0;i<devices.size();i++) {
			RemoteDevice btDevice = (RemoteDevice)devices.elementAt(i);
			try {
				String name = btDevice.getFriendlyName(true);
				midlet.form.append("	\n发现设备:" + name);
				System.out.println("	\n发现设备:" + name);
			} catch (Exception e) {
				e.printStackTrace();
			}
		}
	}   
}