Android 蓝牙开发实例解析

<uses-permission android:name="android.permission.BLUETOOTH"/>  <uses-permission android:name="android.permission.BLUETOOTH_ADMIN"/> 

BluetoothAdapter adapter = BluetoothAdapter.getDefaultAdapter();    //直接打开系统的蓝牙设置面板    Intent intent = new Intent(BluetoothAdapter.ACTION_REQUEST_ENABLE);    startActivityForResult(intent, 0x1);    //直接打开蓝牙    adapter.enable();    //关闭蓝牙    adapter.disable();    //打开本机的蓝牙发现功能（默认打开120秒，可以将时间最多延长至300秒）    Intent discoveryIntent = new Intent(BluetoothAdapter.ACTION_REQUEST_DISCOVERABLE);    discoverableIntent.putExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, 300);//设置持续时间（最多300秒） 

// 创建一个接收ACTION_FOUND广播的BroadcastReceiver    private final BroadcastReceiver mReceiver = new BroadcastReceiver() {     public void onReceive(Context context, Intent intent) {      String action = intent.getAction();      // 发现设备      if (BluetoothDevice.ACTION_FOUND.equals(action)) {       // 从Intent中获取设备对象       BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);       // 将设备名称和地址放入array adapter，以便在ListView中显示       mArrayAdapter.add(device.getName() + "/n" + device.getAddress());    }   }  };    // 注册BroadcastReceiver    IntentFilter filter = new IntentFilter(BluetoothDevice.ACTION_FOUND);    registerReceiver(mReceiver, filter); // 不要忘了之后解除绑定 

private class AcceptThread extends Thread {     private final BluetoothServerSocket mmServerSocket;     public AcceptThread() {      // Use a temporary object that is later assigned to mmServerSocket,      // because mmServerSocket is final      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 {      socket = mmServerSocket.accept();     } catch (IOException e) {      break;     }       // If a connection was accepted     if (socket != null) {      // Do work to manage the connection (in a separate thread)      manageConnectedSocket(socket);      mmServerSocket.close();      break;     }    }   }      /** Will cancel the listening socket, and cause the thread to finish */   public void cancel() {    try {     mmServerSocket.close();    } catch (IOException e) { }   }  } 

private class ConnectThread extends Thread {  private final BluetoothSocket mmSocket;     private final BluetoothDevice mmDevice;         public ConnectThread(BluetoothDevice device) {      // Use a temporary object that is later assigned to mmSocket,      // because mmSocket is final      BluetoothSocket tmp = null;      mmDevice = device;          // 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 (IOException 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);   }     /** Will cancel an in-progress connection, and close the socket */    public void cancel() {    try {     mmSocket.close();      } catch (IOException e) { }    }  } 

private class ConnectedThread extends Thread {     private final BluetoothSocket mmSocket;     private final InputStream mmInStream;     private final OutputStream mmOutStream;         public ConnectedThread(BluetoothSocket socket) {      mmSocket = socket;      InputStream tmpIn = null;      OutputStream tmpOut = null;          // 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      while (true) {       try {        // Read from the InputStream        bytes = mmInStream.read(buffer);        // Send the obtained bytes to the UI Activity        mHandler.obtainMessage(MESSAGE_READ, bytes, -1, buffer)          .sendToTarget();       } catch (IOException e) {        break;       }      }     }         /* Call this from the main Activity to send data to the remote device */     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) { }     }    }