基于蓝牙socket开发Android蓝牙通信

http://www.cyqdata.com/android/article-detail-53225#

如何实现Android蓝牙通信？一般通过使用蓝牙虚拟串口，可以通过配置非常简单地实现，很多外置蓝牙GPS都用这种做法。
然而Android却不支持，因此不得不得使用第二种方式：蓝牙socket。
本示例不使用C++开发，借助于第三方.NET组件inthehand来实现。
手机端的初始化代码。其中的具体含义可参照http://android.tgbus.com/Android/tutorial/201103/346657.shtml。
    private PrintStream mPrintStream = null;
    private BufferedReader mBufferedReader = null;

    BluetoothAdapter myBluetoothAdapter = null;
    BluetoothServerSocket mBThServer = null;
    BluetoothSocket mBTHSocket = null;



    myBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();

        myBluetoothAdapter.enable();//open bth

        Intent discoverableIntent = new Intent(
                BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);//使得蓝牙处于可发现模式，持续时间150s
        discoverableIntent.putExtra(
                BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 150);
　下面是PC上的初始化核心代码：PC是作为客户端出现的。它需要通过搜索获取手机的蓝牙MAC地址，实现通信。GUID又名UUID，是标记硬件地址的一种方法。
   /// <summary>
        /// 打开端口
        /// </summary>
        /// <param name="Name">端口名称</param>
        /// <returns>成功否</returns>
        public bool OpenPort(string Name)
        {
            InTheHand.Net.Bluetooth.BluetoothRadio.PrimaryRadio.Mode = InTheHand.Net.Bluetooth.RadioMode.Connectable;
            InTheHand.Net.Sockets.BluetoothClient cli = new InTheHand.Net.Sockets.BluetoothClient();
            InTheHand.Net.Sockets.BluetoothDeviceInfo[] devices = cli.DiscoverDevices();
            foreach (InTheHand.Net.Sockets.BluetoothDeviceInfo device in devices)//设备搜寻
            {
                device.Update();
                device.Refresh();
                MessageBox.Show("设备已找到");
                break;
            }


            BluetoothDeviceInfo bd = new BluetoothDeviceInfo(devices[0].DeviceAddress);
            bluetoothClient = new BluetoothClient();

            Guid mGUID = Guid.Parse("fa87c0d0-afac-11de-8a39-0800200c9a66");
            bluetoothClient.Connect(devices[0].DeviceAddress, mGUID);//客户端对地址实现连接，这是一个阻塞线程，需要服务器端的回应
            ReceiveThread = new Thread(ReceiveMethod);
            ReceiveThread.Start();

            return true;
        }
        下面是手机接受PC端连接请求的方法：
  1     if (connected)
2                 {
3                     return;
4                 }
5                 try
6                 {
7                     mBThServer = myBluetoothAdapter
8                             .listenUsingRfcommWithServiceRecord(NAME_SECURE,
9                                     MY_UUID_SECURE);
10                 } catch (IOException e)
11                 {
12                     // TODO Auto-generated catch block
13                     e.printStackTrace();
14                 }
15
16                 try
17                 {
18                     mBTHSocket = mBThServer.accept();
19                 } catch (IOException e)
20                 {
21                     // TODO Auto-generated catch block
22                     e.printStackTrace();
23                 }
24                 try
25                 {
26                     mBufferedReader = new BufferedReader(new InputStreamReader(
27                             mBTHSocket.getInputStream()));
28                 } catch (IOException e1)
29                 {
30                     // TODO Auto-generated catch block
31                     e1.printStackTrace();
32                 }// 取得输入、输出流
33                 try
34                 {
35                     mPrintStream = new PrintStream(
36                             mBTHSocket.getOutputStream(), true);
37                     connected = true;
38                 } catch (IOException e)
39                 {
40                     // TODO Auto-generated catch block
41                     e.printStackTrace();
42                 }
   要通过手机发送数据，执行以下代码即可：
        mPrintStream.write(buff);
                } catch (IOException e)
                {
                    // TODO Auto-generated catch block
                    e.printStackTrace();
                }// 发送给服务器
                mPrintStream.flush();
    PC端的接受代码：
  while (isConnecting)
            {

                try
                {
                    Stream peerStream = bluetoothClient.GetStream();
                    peerStream.Read(buffer, 0, PACKETLENGTH);
                  //dataprocess();
                }


                catch (Exception ex)
                {
                    isConnecting = false;
                    MessageBox.Show(ex.ToString());

                }
以下有几个需要注意事项：
1：inthehand.net.personal是PC端上一定要用得到的库，但注意这个库函数的版本，版本弄错了是很浪费时间的。
2：手机设备的蓝牙硬件权限要打开，否则就没法运行。