Question

我的目标是创建一种project。我想通过蓝牙将一些字符串发送到PC上的Proteus。在MIT App Inventor（MIT app）中进行的应用程序可以工作。我想在Android Studio中创建类似的应用。我使用这个Android Studio app by mitchtabian，可以编写一些文本并将其发送到绑定设备。问题：我无法创建RfcommSocket。我也尝试创建UnsecureRfcommSocket，但是它没有用。

    public void run(){
        BluetoothSocket tmp = null;
        Log.i(TAG, "RUN mConnectThread ");

        // Get a BluetoothSocket for a connection with the
        // given BluetoothDevice
        try {
            Log.d(TAG, "ConnectThread: Trying to create InsecureRfcommSocket using UUID: "
                    +MY_UUID_INSECURE );
            tmp = mmDevice.createRfcommSocketToServiceRecord(deviceUUID);
        } catch (IOException e) {
            Log.e(TAG, "ConnectThread: Could not create InsecureRfcommSocket " + e.getMessage());
        }

        mmSocket = tmp;
        Log.d(TAG, "run: mmSocket = tmp");

        // Always cancel discovery because it will slow down a connection
        mBluetoothAdapter.cancelDiscovery();

        // Make a connection to the BluetoothSocket ....

还有日志：

I / BluetoothConnectionServ：运行mConnectThread
  D / BluetoothConnectionServ：ConnectThread：尝试使用UUID创建InsecureRfcommSocket：8ce255c0-200a-11e0-ac64-0800200c9a66
  D / BluetoothConnectionServ：运行：mmSocket = tmp
  W / BluetoothAdapter：调用getBluetoothService（）且没有BluetoothManagerCallback
  W / DecorView [Connecting Bluetooth]：导航栏的可见性很低，color = ffffffff，hasLightNavBar = true，isFloating = true
  D / BluetoothSocket：close（）此：android.bluetooth.BluetoothSocket@eeeeaba，频道：-1，mSocketIS：android.net.LocalSocketImpl$SocketInputStream@d1acd6b，mSocketOS：android.net.LocalSocketImpl$SocketOutputStream@ac240c8mSocket：android.net。 LocalSocket @ 722b561 impl：android.net.LocalSocketImpl@710f886 fd：java.io.FileDescriptor@b96d547，mSocketState：INIT
D / BluetoothConnectionServ：运行：封闭套接字。
  D / BluetoothConnectionServ：运行：ConnectThread：无法连接到UUID：8ce255c0-200a-11e0-ac64-0800200c9a66
  D / BluetoothConnectionServ：已连接：正在启动。
  D / BluetoothConnectionServ：ConnectedThread：正在启动。
  E / BluetoothConnectionServ：写入：读取输入流时出错。插座已关闭

无法使用UUID

0 个答案: