Java开发Android应用时，切换Activity时利用macAdress在新的Activity中建立socket和IO流（蓝牙连接）

问题遇到的现象和发生背景

通过intent在两个Activity中传递macAdress，但是在第二个页面无法建立与蓝牙的连接。

问题相关代码，请勿粘贴截图

private BluetoothAdapter bluetoothAdapter;
public  BluetoothSocket mSocket;
private BroadcastReceiver receiver;
private final int CONNECTED = 1000;
private final int DISCONNECTED = 1001;
private int state = DISCONNECTED;
private ComThread mThread = null;
//private ConnectThread mThread = null;

public void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.act_control);
init();
bind();
bluetoothOpen();
}

private void bluetoothOpen() {
bluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
Intent intent = this.getIntent();
String macAdress = intent.getStringExtra("macAdress");
Toast.makeText(getApplicationContext(), macAdress, Toast.LENGTH_SHORT).show();
BluetoothDevice device = bluetoothAdapter.getRemoteDevice(macAdress);
try
{

        /*
        final String SPP_UUID="";
        UUID uuid = UUID.fromString(SPP_UUID); //Standard SerialPortService ID
        mSocket = device.createRfcommSocketToServiceRecord(uuid); 
        */
        
        
        Method clientMethod = device.getClass().getMethod("createRfcommSocket", new Class[]{int.class});
        mSocket = (BluetoothSocket) clientMethod.invoke(device, 1);
        // 1 连接单片机 ,  2和3 连接手机  
        
                     
        try 
        {
            mSocket.connect();//连
            if (mSocket.isConnected())
            {
                Toast.makeText(getApplicationContext(), "蓝牙连接成功", Toast.LENGTH_SHORT).show();
                mThread = new ComThread(mSocket);
                mThread.start();//另开一个线程，与蓝牙设备进行通信
                state = CONNECTED;
            } 
            else 
            {
                Toast.makeText(getApplicationContext(), "蓝牙连接失败", Toast.LENGTH_SHORT).show();
                mSocket.close();
            }
        } catch (Exception e) {
            e.printStackTrace();
        }

    } catch (NoSuchMethodException e) {
        e.printStackTrace();
    } catch (IllegalAccessException e) {
        e.printStackTrace();
    } catch (InvocationTargetException e) {
        e.printStackTrace();
    }
}

有没有报错信息，输出连接蓝牙相关参数是否有误。

第二个页面无法建立与蓝牙的连接？ 第一个页面可以连接的话，那就是蓝牙端口被占用了导致第二个页面无法链接