手机应用开发之如何利用蓝牙与HC-05通信？-工程代码

package com.example.blcommunicate; import android.bluetooth.BluetoothAdapter; import android.bluetooth.BluetoothDevice; import android.bluetooth.BluetoothServerSocket; import android.bluetooth.BluetoothSocket; import android.content.Context; import android.os.Bundle; import android.os.Handler; import android.os.Message; import android.util.Log; import java.io.ByteArrayInputStream; import java.io.DataInputStream; import java.io.IOException; import java.io.InputStream; import java.io.OutputStream; import java.util.UUID; /** *该类的工作:建立和管理蓝牙连接。 *共有三个线程。mAcceptThread线程用来监听socket连接（服务端使用）. *mConnectThread线程用来连接serversocket（客户端使用）。 *mConnectedThread线程用来处理socket发送、接收数据。（客户端和服务端共用） */ public class BluetoothChatUtil { private static final String TAG = "BluetoothChatClient"; private static final boolean D = true; // 服务名 SDP private static final String SERVICE_NAME = "BluetoothChat"; // uuid SDP private static final UUID SERVICE_UUID = UUID.fromString("00001101-0000-1000-8000-00805F9B34FB"); // 蓝牙适配器 private final BluetoothAdapter mAdapter; private Handler mHandler; private AcceptThread mAcceptThread; private ConnectThread mConnectThread; private ConnectedThread mConnectedThread; private int mState; private static BluetoothChatUtil mBluetoothChatUtil; private BluetoothDevice mConnectedBluetoothDevice; //常数，指示当前的连接状态 public static final int STATE_NONE = 0; // 当前没有可用的连接 public static final int STATE_LISTEN = 1; // 现在侦听传入的连接 public static final int STATE_CONNECTING = 2; // 现在开始连接 public static final int STATE_CONNECTED = 3; // 现在连接到远程设备 public static final int STATAE_CONNECT_FAILURE = 4; //连接失败 public static final int MESSAGE_DISCONNECTED = 5; //断开连接 public static final int STATE_CHANGE = 6; //连接状态改变 public static final int MESSAGE_READ = 7; public static final int MESSAGE_WRITE = 8; public static final String DEVICE_NAME = "device_name"; public static final String READ_MSG = "read_msg"; /** * 构造函数。准备一个新的bluetoothchat会话。 * @param context */ private BluetoothChatUtil(Context context) { mAdapter = BluetoothAdapter.getDefaultAdapter(); mState = STATE_NONE; } public static BluetoothChatUtil getInstance(Context c) { if (null == mBluetoothChatUtil) { mBluetoothChatUtil = new BluetoothChatUtil(c); } return mBluetoothChatUtil; } public void registerHandler(Handler handler) { mHandler = handler; } public void unregisterHandler() { mHandler = null; } /** * 设置当前状态的聊天连接 * @param state 整数定义当前连接状态 */ private synchronized void setState(int state) { if (D) Log.d(TAG, "setState() " + mState + " -> " + state); mState = state; // 给新状态的处理程序，界面活性可以更新 mHandler.obtainMessage(STATE_CHANGE, state, -1).sendToTarget(); } /** * 返回当前的连接状态。 */ public synchronized int getState() { return mState; } public BluetoothDevice getConnectedDevice() { return mConnectedBluetoothDevice; } /** * 开始聊天服务。特别acceptthread开始 * 开始服务器模式。 */ public synchronized void startListen() { if (D) Log.d(TAG, "start"); // 取消任何线程正在运行的连接 if (mConnectedThread != null) { mConnectedThread.cancel(); mConnectedThread = null; } // 启动线程来监听一个bluetoothserversocket if (mAcceptThread == null) { mAcceptThread = new AcceptThread(); mAcceptThread.start(); } setState(STATE_LISTEN); } /** * 开始connectthread启动连接到远程设备。 * @param device 连接的蓝牙设备 */ public synchronized void connect(BluetoothDevice device) { if (D) Log.d(TAG, "connect to: " + device); // 取消任何线程试图建立连接 if (mState == STATE_CONNECTING) { if (mConnectThread != null) { mConnectThread.cancel(); mConnectThread = null; } } // 取消任何线程正在运行的连接 if (mConnectedThread != null) { mConnectedThread.cancel(); mConnectedThread = null; } //启动线程连接到远程设备 mConnectThread = new ConnectThread(device); mConnectThread.start(); setState(STATE_CONNECTING); } /** * 开始ConnectedThread开始管理一个蓝牙连接,传输、接收数据. * @param socket socket连接 * @param device 已连接的蓝牙设备 */ public synchronized void connected(BluetoothSocket socket, BluetoothDevice device) { if (D) Log.d(TAG, "connected"); //取消任何线程正在运行的连接 if (mConnectedThread != null) { mConnectedThread.cancel(); mConnectedThread = null; } // 启动线程管理连接和传输 mConnectedThread = new ConnectedThread(socket); mConnectedThread.start(); //把连接设备的名字传到 ui Activity mConnectedBluetoothDevice = device; Message msg = mHandler.obtainMessage(STATE_CONNECTED); Bundle bundle = new Bundle(); bundle.putString(DEVICE_NAME, device.getName()); msg.setData(bundle); mHandler.sendMessage(msg); setState(STATE_CONNECTED); } /** * 停止所有的线程 */ public synchronized void disconnect() { if (D) Log.d(TAG, "disconnect"); if (mConnectThread != null) {mConnectThread.cancel(); mConnectThread = null;} if (mConnectedThread != null) {mConnectedThread.cancel(); mConnectedThread = null;} if (mAcceptThread != null) {mAcceptThread.cancel(); mAcceptThread = null;} setState(STATE_NONE); } /** * Write to the ConnectedThread in an unsynchronized manner * @param out The bytes to write * @see ConnectedThread#write(byte[]) */ public void write(byte[] out) { //创建临时对象 ConnectedThread r; // 同步副本的connectedthread synchronized (this) { if (mState != STATE_CONNECTED) return; r = mConnectedThread; } // 执行写同步 r.write(out); } /** * Indicate that the connection attempt failed and notify the UI Activity. */ private void connectionFailed() { // 发送失败的信息带回活动 Message msg = mHandler.obtainMessage(STATAE_CONNECT_FAILURE); mHandler.sendMessage(msg); mConnectedBluetoothDevice = null; setState(STATE_NONE); } /** * Indicate that the connection was lost and notify the UI Activity. */ public void connectionLost() { // 发送失败的信息带回Activity Message msg = mHandler.obtainMessage(MESSAGE_DISCONNECTED); mHandler.sendMessage(msg); mConnectedBluetoothDevice = null; setState(STATE_NONE); } /** *本线程 侦听传入的连接。 *它运行直到连接被接受（或取消）。 */ private class AcceptThread extends Thread { // 本地服务器套接字 private final Bl