Android 蓝牙，在 LG 手机上查找名称为空的设备

Question

我编写了一个小型蓝牙接收器，它可以处理大部分 BT 状态。

接收器适用于大多数情况，我将其接通，但在某些情况下，找到的设备的名称为空字符串，我无法区分一个设备和另一个设备。

以下是该发现的代码片段和一段日志来支持它：

注意：在第二次检测之前，BT 适配器已关闭并打开。

另一个注意： 这种情况每隔一两次就会发生一次。第一次找到名称，第二次没有名称

public class BT_Receiver
        extends BroadcastReceiver {
...
    @Override
    public void onReceive(Context context, Intent intent) {
        if (deviceDetectionListener.allDevicesFound())
            return;
        String action = intent.getAction();
        if (BluetoothAdapter.ACTION_STATE_CHANGED.equals(action)) {
            int newState = intent.getIntExtra(BluetoothAdapter.EXTRA_STATE, -1);
            state = BT_State.getInstanceForState(newState);
            Toast.makeText(activity, state.name(), Toast.LENGTH_SHORT).show();
            if (state == BT_State.On && enableAndDiscover)
                startDiscoveringDevices();
            return;
        }
        if (BluetoothAdapter.ACTION_DISCOVERY_STARTED.equals(action)) {
            state = BT_State.Discovering;
            Toast.makeText(activity, state.name(), Toast.LENGTH_SHORT).show();
            return;
        }
        if (BluetoothAdapter.ACTION_DISCOVERY_FINISHED.equals(action)) {
            state = BT_State.On;
            Toast.makeText(activity, "Finished discovery", Toast.LENGTH_SHORT).show();
            return;
        }
        if (BluetoothAdapter.ACTION_SCAN_MODE_CHANGED.equals(action)) {
            int discoveryDuration = intent.getIntExtra(BluetoothAdapter.EXTRA_DISCOVERABLE_DURATION, -1);
            state = BT_State.Advertising;
            Toast.makeText(activity, state.name() + ", duration: " + discoveryDuration, Toast.LENGTH_SHORT).show();
        }
        if (!BluetoothDevice.ACTION_FOUND.equals(action))
            return;
        BluetoothDevice device = intent.getParcelableExtra(BluetoothDevice.EXTRA_DEVICE);
(Look at the LOG RESULT)       
                    Log.i(TAG, "Bluetooth device found: " + device.getName() + ", " + device.getBluetoothClass() + ", " + device.getAddress());
        deviceDetectionListener.newDeviceDetected(device);
        if (deviceDetectionListener.allDevicesFound())
            detectionCompleted();
    }

...
}

带有设备名称的日志：

08-15 22:54:16.500: INFO/SOD:BT_Receiver(16151): <!>com.nu.art.software.log.Log 69<!> Bluetooth device found: [bbbb:Demo gizmo 2], 5a0204, 6C:0E:0D:77:B0:96
08-15 22:54:16.578: INFO/SOD:BT_Receiver(16151): <!>com.nu.art.software.log.Log 69<!> Bluetooth device found: [aaaa:Demo gizmo 1], 5a020c, 00:26:CC:81:AF:AD
08-15 22:54:33.820: INFO/SOD:BT_Receiver(16151): <!>com.nu.art.software.log.Log 69<!> Bluetooth device found: Zomaar Iemand, 5a0204, 20:21:A5:C0:CF:6F

另一个没有名称的日志：

08-15 22:54:34.304: INFO/SOD:BT_Receiver(16151): <!>com.nu.art.software.log.Log 69<!> Bluetooth device found: , 5a0204, 00:26:E2:66:31:30
08-15 22:54:36.882: INFO/SOD:BT_Receiver(16151): <!>com.nu.art.software.log.Log 69<!> Bluetooth device found: , 5a0204, 6C:0E:0D:77:B0:96
08-15 22:54:38.601: INFO/SOD:BT_Receiver(16151): <!>com.nu.art.software.log.Log 69<!> Bluetooth device found: , 5a020c, 00:26:CC:81:AF:AD
08-15 22:54:39.820: INFO/SOD:BT_Receiver(16151): <!>com.nu.art.software.log.Log 69<!> Bluetooth device found: , 520204, 78:CA:04:83:45:CD

提前致谢，

Adam。

Answer 1

这可能是一个功能而不是错误，我找到了一个解决方法，如果设备没有名称，我不会保存它，如果没有找到设备，请再次运行查询。