android - 使用 Android 应用程序找不到蓝牙服务

Question

启动用 c 编写的蓝牙服务器后。

https://github.com/RyanGlScott/BluetoothTest/blob/master/C%20BlueZ%20Server/bluez_server.c

这是命令 sdptool browser local 的输出:

....other services....

    Service Name: AVRCP CT
    Service RecHandle: 0x10005
    Service Class ID List:
      "AV Remote" (0x110e)
    Protocol Descriptor List:
      "L2CAP" (0x0100)
        PSM: 23
      "AVCTP" (0x0017)
        uint16: 0x103
    Profile Descriptor List:
      "AV Remote" (0x110e)
        Version: 0x0100


    /*MY SERVICE!!!*/
    Service Name: Armatus Bluetooth server
    Service Description: A HERMIT server that interfaces with the Armatus Android app
    Service Provider: Armatus
    Service RecHandle: 0x10006
    Service Class ID List:
      "Serial Port" (0x1101)
    Protocol Descriptor List:
      "L2CAP" (0x0100)
      "RFCOMM" (0x0003)
        Channel: 3
    Profile Descriptor List:
      "Serial Port" (0x1101)
        Version: 0x0100

....other services....

我正在尝试使用 Android 应用查找此服务

// Create a BroadcastReceiver for ACTION_FOUND
private final BroadcastReceiver broadcastReceiver = new BroadcastReceiver() {

      public void onReceive(Context context, Intent intent) {
            String action = intent.getAction();
            // Whenever a remote Bluetooth device is found
            if (BluetoothDevice.ACTION_FOUND.equals(action)) {
                // Get the BluetoothDevice object from the Intent
                BluetoothDevice bluetoothDevice = 
                intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
                // Add the name and address to an array adapter to show in a ListView
                adapter.add(bluetoothDevice.getName() + "\n"
                        + bluetoothDevice.getAddress());


                if (bluetoothDevice.getName().equals("mint-0")) {
                    Log.d("tagmint0","bene bene");

                    try {

                    ParcelUuid[] uuids = (ParcelUuid[])  bluetoothDevice.getUuids();


                    for (ParcelUuid uuid : uuids) {
                        Log.d("x", "mintUUIDxx: " + uuid.getUuid().toString() + "\n");

                    }



                    } catch (Exception e) {
                    e.printStackTrace();
                    }

                }
            }
        }
    };

我的问题是，为什么我的 Android 应用程序无法找到我的服务，即使使用命令 sdptool browser local 可以看到它？

这是 Android 应用程序输出

mintUUIDxx: 0000111e-0000-1000-8000-00805f9b34fb
mintUUIDxx: 00001105-0000-1000-8000-00805f9b34fb
mintUUIDxx: 00001106-0000-1000-8000-00805f9b34fb
mintUUIDxx: 0000112d-0000-1000-8000-00805f9b34fb
mintUUIDxx: 0000110e-0000-1000-8000-00805f9b34fb
mintUUIDxx: 00001112-0000-1000-8000-00805f9b34fb
mintUUIDxx: 0000111f-0000-1000-8000-00805f9b34fb
mintUUIDxx: 00000000-0000-1000-8000-00805f9b34fb

如您所见，它不包含服务器 uuid。有人可以解释一下为什么吗？

Answer 1

bluetoothDevice.getUuids();

此方法不会启动服务发现过程来从远程设备检索 UUID。相反，会返回服务 UUID 的本地缓存副本。

改用fetchUuidsWithSdp()。此方法在远程设备上执行服务发现以获得支持的 UUID。