<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) { }  
  
 }  
  
}