转自：http://blog.csdn.net/einarzhang/article/details/6943861


在AndroidSDK sample中给出了一个蓝牙聊天的示例代码，本文只是略作修改变成一个简单的服务器和客户端模式的应用，以适应在游戏开发中一对一关联的数据传输。

由于游戏中的蓝牙设置在新线程中发生，所以采用Handler的方式将蓝牙的状态以及读取信息传输给显示Activity。

1 开启蓝牙，包括xml中的配置:

[html] view plain copy
  1. <uses-permissionandroid:name="android.permission.BLUETOOTH_ADMIN"/>
  2. <uses-permissionandroid:name="android.permission.BLUETOOTH"/>


[java] view plain copy
  1. //获取蓝牙适配器
  2. BluetoothAdapterbtAdapter=BlueToothService.getInstance().getBtAdapter();
  3. //开启蓝牙
  4. if(!btAdapter.isEnabled()){
  6. IntentenableIntent=newIntent(BluetoothAdapter.ACTION_REQUEST_ENABLE);
  8. startActivityForResult(enableIntent,ConstantsUtil.ENABLE_BLUETOOTH);
  10. }


2 在当前Activity中获取蓝牙开启结果，并根据具体情况对蓝牙进行处理

[java] view plain copy
  1. @Override
  3. protectedvoidonActivityResult(intrequestCode,intresultCode,Intentdata){
  5. switch(requestCode){
  7. caseConstantsUtil.ENABLE_BLUETOOTH:
  9. if(resultCode==Activity.RESULT_OK){
  11. bluetoothProcess(PSystem.isServer);
  13. }else{
  15. finish();
  17. }
  19. }
  21. }
  23. publicvoidbluetoothProcess(booleanisServer){
  24. BlueToothService.getInstance().setsHandler(mHandler);
  25. if(isServer){
  26. //如果是蓝牙服务器，则需要开启发现服务，并启动蓝牙服务器
  27. if(btAdapter.getScanMode()!=BluetoothAdapter.SCAN_MODE_CONNECTABLE_DISCOVERABLE){
  28. IntentdiscoverableIntent=newIntent(
  29. BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);
  30. discoverableIntent.putExtra(
  31. BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION,180);
  32. startActivity(discoverableIntent);
  33. }
  34. BlueToothService.getInstance().start();
  35. }else{
  36. //如果是蓝牙客户端则扫描周围可用的蓝牙设备
  37. blueToothNames=newArrayList<String>();
  38. blutToothDevices=newArrayList<BluetoothDevice>();
  39. //添加过滤器，并注册广播，用于监听蓝牙发现信息
  40. IntentFilterfilter=newIntentFilter(BluetoothDevice.ACTION_FOUND);
  41. this.registerReceiver(mReceiver,filter);
  42. filter=newIntentFilter(BluetoothAdapter.ACTION_DISCOVERY_FINISHED);
  43. this.registerReceiver(mReceiver,filter);
  44. //开始扫描
  45. doDiscovery();
  46. }
  47. }
  48. publicvoiddoDiscovery(){
  49. if(btAdapter.isDiscovering()){
  50. btAdapter.cancelDiscovery();
  51. }
  52. btAdapter.startDiscovery();
  53. }


3 蓝牙广播接收器

[java] view plain copy
  1. privatefinalBroadcastReceivermReceiver=newBroadcastReceiver(){
  2. @Override
  3. publicvoidonReceive(Contextcontext,Intentintent){
  4. Stringaction=intent.getAction();
  5. if(BluetoothDevice.ACTION_FOUND.equals(action)){
  6. BluetoothDevicedevice=intent
  7. .getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
  8. if(device.getName()!=null&&!device.getName().trim().equals("")){
  9. blueToothNames.add(device.getName());
  10. blutToothDevices.add(device);
  11. }
  12. }elseif(BluetoothAdapter.ACTION_DISCOVERY_FINISHED
  13. .equals(action)){
  14. btAdapter.cancelDiscovery();
  15. TestActivity.this.unregisterReceiver(this);
  16. }
  17. }
  18. };


4 以上是蓝牙基本配置和发现。现在进行蓝牙监听和连接：

蓝牙服务器监听代码：

[java] view plain copy
  1. publicvoidstart(){
  2. BluetoothServerSocketserverSocket=null;
  3. try{
  4. serverSocket=btAdapter.listenUsingRfcommWithServiceRecord("JumpForMeApp",MY_UUID_SECURE);
  5. changeState(ConstantsUtil.BT_STATE_LISTEN);
  6. btSocket=serverSocket.accept();
  7. }catch(IOExceptione){
  8. }finally{
  9. try{
  10. serverSocket.close();
  11. }catch(IOExceptione){
  12. }
  13. }
  14. if(btSocket!=null){
  15. changeState(ConstantsUtil.BT_STATE_CONNECTED);
  16. }
  17. }

客户端连接代码：

[java] view plain copy
  1. publicvoidconnect(BluetoothDevicedevice){
  2. try{
  3. btAdapter.cancelDiscovery();
  4. btSocket=device.createRfcommSocketToServiceRecord(MY_UUID_SECURE);
  5. changeState(ConstantsUtil.BT_STATE_CONNECTING);
  6. btSocket.connect();
  7. }catch(IOExceptione){
  8. }
  9. changeState(ConstantsUtil.BT_STATE_CONNECTED);
  10. }


5利用蓝牙进行消息传递，建立新的线程来处理读写操作(见BluetoothChat Sample中的ConnectedThread)：

[java] view plain copy
  1. classConnectedThreadextendsThread{
  2. privatefinalBluetoothSocketmmSocket;
  3. privatefinalInputStreammmInStream;
  4. privatefinalOutputStreammmOutStream;
  6. publicConnectedThread(BluetoothSocketsocket){
  7. mmSocket=socket;
  8. InputStreamtmpIn=null;
  9. OutputStreamtmpOut=null;
  10. try{
  11. tmpIn=socket.getInputStream();
  12. tmpOut=socket.getOutputStream();
  13. }catch(IOExceptione){
  14. Log.e(TAG,"tempsocketsnotcreated",e);
  15. }
  16. mmInStream=tmpIn;
  17. mmOutStream=tmpOut;
  18. }
  20. publicvoidrun(){
  21. byte[]buffer=newbyte[1024];
  22. intbytes;
  23. while(true){
  24. try{
  25. bytes=mmInStream.read(buffer);
  26. if(transHandler!=null){
  27. //通知数据传输处理器
  28. transHandler.sendMessage(transHandler.obtainMessage(ConstantsUtil.BT_READ,bytes,-1,buffer));
  29. }
  30. }catch(IOExceptione){
  31. Log.e(TAG,"disconnected",e);
  32. break;
  33. }
  34. }
  35. }
  37. publicvoidwrite(byte[]buffer){
  38. try{
  39. mmOutStream.write(buffer);
  40. }catch(IOExceptione){
  41. Log.e(TAG,"Exceptionduringwrite",e);
  42. }
  43. }
  45. publicvoidcancel(){
  46. try{
  47. mmSocket.close();
  48. }catch(IOExceptione){
  49. Log.e(TAG,"close()ofconnectsocketfailed",e);
  50. }
  51. }
  52. }

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