蓝牙的数据传输

我们可以将手机的蓝牙设置成客户端也可以是服务器端然后将两者之间绑定起来然后传递数据
在传输数据的时候客户端和服务器端要有相同的UUID(必须是这个类似与网络传输中的IP地址)

public static final String CONNECTTION_UUID = "00001101-0000-1000-8000-00805F9B34FB";

客户端与服务器端分别开启两个线程
服务器端

package com.example.blue.connect;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothServerSocket;
import android.bluetooth.BluetoothSocket;
import android.os.Handler;

import java.io.IOException;
import java.util.UUID;

/**
 * Created by 小新 on 2016/6/11.
 */
//服务器端线程
public class AcceptThread extends Thread {
    private static final String NAME = "BlueToothClass";
    private static final UUID MY_UUID = UUID.fromString(Constant.CONNECTTION_UUID);

    private final BluetoothServerSocket mmServerSocket;
    private final BluetoothAdapter mBluetoothAdapter;
    private final Handler mHandler;
    private ConnectedThread mConnectedThread;

    public AcceptThread(BluetoothAdapter adapter, Handler handler) {
        // Use a temporary object that is later assigned to mmServerSocket,
        // because mmServerSocket is final
        mBluetoothAdapter = adapter;
        mHandler = handler;
        BluetoothServerSocket tmp = null;
        try {
            // MY_UUID is the app's UUID string, also used by the client code
            tmp = mBluetoothAdapter.listenUsingRfcommWithServiceRecord(NAME, MY_UUID);
        } catch (IOException e) { }
        mmServerSocket = tmp;
    }

    public void run() {
        BluetoothSocket socket = null;
        // Keep listening until exception occurs or a socket is returned
        while (true) {
            try {
                mHandler.sendEmptyMessage(Constant.MSG_START_LISTENING);
                socket = mmServerSocket.accept();
            } catch (IOException e) {
                mHandler.sendMessage(mHandler.obtainMessage(Constant.MSG_ERROR, e));
                break;
            }
            // If a connection was accepted
            if (socket != null) {
                // Do work to manage the connection (in a separate thread)
                manageConnectedSocket(socket);
                try {
                    mmServerSocket.close();
                    mHandler.sendEmptyMessage(Constant.MSG_FINISH_LISTENING);
                } catch (IOException e) {
                    e.printStackTrace();
                }
                break;
            }
        }
    }

    private void manageConnectedSocket(BluetoothSocket socket) {
        //只支持同时处理一个连接
        if( mConnectedThread != null) {
            mConnectedThread.cancel();
        }
        mHandler.sendEmptyMessage(Constant.MSG_GOT_A_CLINET);
        mConnectedThread = new ConnectedThread(socket, mHandler);
        mConnectedThread.start();
    }

    /** Will cancel the listening socket, and cause the thread to finish */
    public void cancel() {
        try {
            mmServerSocket.close();
            mHandler.sendEmptyMessage(Constant.MSG_FINISH_LISTENING);
        } catch (IOException e) { }
    }

    public void sendData(byte[] data) {
        if( mConnectedThread!=null){
            mConnectedThread.write(data);
        }
    }
}

客户端

package com.example.blue.connect;

import android.bluetooth.BluetoothAdapter;
import android.bluetooth.BluetoothDevice;
import android.bluetooth.BluetoothSocket;
import android.os.Handler;

import java.io.IOException;
import java.util.UUID;

/**
 * Created by 小新 on 2016/6/11. */
public class ConnectThread extends Thread {
    private static final UUID MY_UUID = UUID.fromString(Constant.CONNECTTION_UUID);
    private final BluetoothSocket mmSocket;
    private final BluetoothDevice mmDevice;
    private BluetoothAdapter mBluetoothAdapter;
    private final Handler mHandler;
    private ConnectedThread mConnectedThread;

    public ConnectThread(BluetoothDevice device, BluetoothAdapter adapter, Handler handler) {
        // Use a temporary object that is later assigned to mmSocket,
        // because mmSocket is final
        BluetoothSocket tmp = null;
        mmDevice = device;
        mBluetoothAdapter = adapter;
        mHandler = handler;
        // Get a BluetoothSocket to connect with the given BluetoothDevice
        try {
            // MY_UUID is the app's UUID string, also used by the server code
            tmp = device.createRfcommSocketToServiceRecord(MY_UUID);
        } catch (IOException e) { }
        mmSocket = tmp;
    }

    public void run() {
        // Cancel discovery because it will slow down the connection
        mBluetoothAdapter.cancelDiscovery();

        try {
            // Connect the device through the socket. This will block
            // until it succeeds or throws an exception
            mmSocket.connect();
        } catch (Exception connectException) {
            mHandler.sendMessage(mHandler.obtainMessage(Constant.MSG_ERROR, connectException));
            // Unable to connect; close the socket and get out
            try {
                mmSocket.close();
            } catch (IOException closeException) { }
            return;
        }

        // Do work to manage the connection (in a separate thread)
        manageConnectedSocket(mmSocket);
    }

    private void manageConnectedSocket(BluetoothSocket mmSocket) {
        mHandler.sendEmptyMessage(Constant.MSG_CONNECTED_TO_SERVER);
        mConnectedThread = new ConnectedThread(mmSocket, mHandler);
        mConnectedThread.start();
    }

    /** Will cancel an in-progress connection, and close the socket */
    public void cancel() {
        try {
            mmSocket.close();
        } catch (IOException e) { }
    }

    public void sendData(byte[] data) {
        if( mConnectedThread!=null){
            mConnectedThread.write(data);
        }
    }
}

发送数据接收数据

package com.example.blue.connect;

import android.bluetooth.BluetoothSocket;
import android.os.Handler;
import android.os.Message;
import android.util.Log;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

/**
 * Created by 小新 on 2016/6/11.
 */
public class ConnectedThread extends Thread {
    private final BluetoothSocket mmSocket;
    private final InputStream mmInStream;
    private final OutputStream mmOutStream;
    private final Handler mHandler;

    public ConnectedThread(BluetoothSocket socket, Handler handler) {
        mmSocket = socket;
        InputStream tmpIn = null;
        OutputStream tmpOut = null;
        mHandler = handler;
        // Get the input and output streams, using temp objects because
        // member streams are final
        try {
            tmpIn = socket.getInputStream();
            tmpOut = socket.getOutputStream();
        } catch (IOException e) { }

        mmInStream = tmpIn;
        mmOutStream = tmpOut;
    }


    public void run() {
        byte[] buffer = new byte[1024];  // buffer store for the stream
        int bytes; // bytes returned from read()

        // Keep listening to the InputStream until an exception occurs
        //一直读数据
        while (true) {
            try {

                // Read from the InputStream
                bytes = mmInStream.read(buffer);
                // Send the obtained bytes to the UI activity
                if( bytes >0) {
                    Message message = mHandler.obtainMessage(Constant.MSG_GOT_DATA, new String(buffer, 0, bytes, "utf-8"));
                    mHandler.sendMessage(message);
                }
                Log.d("GOTMSG", "message size" + bytes);
            } catch (IOException e) {
                mHandler.sendMessage(mHandler.obtainMessage(Constant.MSG_ERROR, e));
                break;
            }
        }
    }

    /* Call this from the main activity to send data to the remote device */
    //发送数据
    public void write(byte[] bytes) {
        try {
            mmOutStream.write(bytes);
        } catch (IOException e) { }
    }

    /* Call this from the main activity to shutdown the connection */
    public void cancel() {
        try {
            mmSocket.close();
        } catch (IOException e) { }
    }
}

Demo地址：Demo地址