android蓝牙开发————实现服务端客户端通信

蓝牙开发——客户端服务端通信
（本文demo下载地址：http://download.csdn.net/detail/gywuhengy/9816902）
一.新建一个工程作为服务端，里面大致要实现的功能有这几个：
（1）权限 android.permission.BLUETOOTH
（2）蓝牙适配器 BluetoothAdapter
（3）输入输出流
（4）客户端，服务端Socket

 // 蓝牙服务端socket
private BluetoothServerSocket mServerSocket;
// 蓝牙客户端socket
private BluetoothSocket mSocket;

（5）两个线程类

// 线程类
private ServerThread mServerThread;
private ReadThread mReadThread;

（6）服务端线程代码

// 开启服务器
private class ServerThread extends Thread {
    public void run() {
        try {
            // 创建一个蓝牙服务器 参数分别：服务器名称、UUID
            mServerSocket = mBluetoothAdapter.listenUsingRfcommWithServiceRecord(PROTOCOL_SCHEME_RFCOMM,
                    UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"));

            Message msg = new Message();
            msg.obj = "请稍候，正在等待客户端的连接...";
            msg.what = STATUS_CONNECTING;
            mHandler.sendMessage(msg);
            //服务端接受
            mSocket = mServerSocket.accept();

            msg = new Message();
            msg.obj = "客户端已经连接上！可以发送指令。";
            msg.what = STATUS_CONNECT;
            mHandler.sendMessage(msg);
            // 启动接受数据
            mReadThread = new ReadThread();
            mReadThread.start();
        } catch (IOException e) {
            e.printStackTrace();
        }
    }
}

（7）读写线程主要代码

 /**
 * 读取数据
 */
private class ReadThread extends Thread {
    public void run() {
        byte[] buffer = new byte[1024];
        int bytes;
        InputStream is = null;
        try {
            is = mSocket.getInputStream();
            while (true) {
                if ((bytes = is.read(buffer)) > 0) {
                    byte[] buf_data = new byte[bytes];
                    for (int i = 0; i < bytes; i++) {
                        buf_data[i] = buffer[i];
                    }
                    String s = new String(buf_data);
                    Message msg = new Message();
                    msg.obj = s;
                    msg.what = STATUS_ACCEPT;
                    mHandler.sendMessage(msg);
                    //同样  子线程不能刷新UI
                    //tv_accept.setText(s);
                }
            }
        } catch (IOException e1) {
            e1.printStackTrace();
        } finally {
            try {
                is.close();
            } catch (IOException e1) {
                e1.printStackTrace();
            }
        }

    }
}

（8）Handler消息处理

/**
 * 信息处理
 */
private Handler mHandler = new Handler() {
    @Override
    public void handleMessage(Message msg) {
        String info = (String) msg.obj;
        switch (msg.what) {
            case STATUS_CONNECT:
                //吐司出 连接状态
                showToast(info);
                break;
            case STATUS_CONNECTING:
                //吐司出 连接状态
                showToast(info);
                break;
            case STATUS_ACCEPT:
                //吐司出 连接状态
                tv_accept.setText(info);
                break;
        }
    }

二.创建客户端需要的大致内容：
（1）权限
android.permission.BLUETOOTH
android.permission.BLUETOOTH_ADMIN
（2）Spinner来加载配对设备
（3）

private BluetoothAdapter mBluetoothAdapter;
private BluetoothDevice mDevice;
//Spinner适配器
private MySpinnerAdapter mySpinnerAdapter;
//线程类
private ClientThread mClientThread;
private ReadThread mReadThread;
// 蓝牙客户端socket
private BluetoothSocket mSocket;

（4）客户端线程

 /**
 * 客户端线程
 */

private class ClientThread extends Thread {
    public void run() {
        try {
            mSocket = mDevice.createRfcommSocketToServiceRecord(UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"));

            Message msg = new Message();
            msg.obj = "请稍候，正在连接服务器:" + serverAdress;
            msg.what = STATUS_CONNECTING;
            mHandler.sendMessage(msg);

            mSocket.connect();

            msg = new Message();
            msg.obj = "已经连接上服务端！可以发送信息。";
            msg.what = STATUS_CONNECT;
            mHandler.sendMessage(msg);
            //TODO 启动接受数据  服务端返回数据(暂时用途不大)
            mReadThread = new ReadThread();
            mReadThread.start();

            //注意子线程不能刷新
            //UIViewRootImpl$CalledFromWrongThreadException:
            //ll_bluetooth.setVisibility(View.VISIBLE);

        } catch (IOException e) {
            Message msg = new Message();
            msg.obj = "连接服务端异常！";
            msg.what = STATUS_ERROR;
            mHandler.sendMessage(msg);
            showToast("失去连接");
        }
    }
}

（5）读写线程与服务端一样这里就不再赘述。。

三、注意当运行demo时需要先开启服务端。