c# - 低功耗蓝牙扫描仪 Xamarin Android

Question

我想用我的应用程序做的是能够读取扫描设备的特征。我能够扫描设备，但扫描会继续接收它发现的任何内容。所以我也想有一个过滤器。我的结果的附加图片位于我的代码下方。

这是我的代码

using Robotics.Mobile.Core.Bluetooth.LE;
using Adapter = Robotics.Mobile.Core.Bluetooth.LE.Adapter;

var appContext = Application.Context;
            _manager = (BluetoothManager)appContext.GetSystemService(BluetoothService); // ("bluetooth");
            _adapter = _manager.Adapter;

            _bleAdapter = new Adapter();
            _bleAdapter.DeviceDiscovered += _bleAdapter_DeviceDiscovered;
            _bleAdapter.ScanTimeoutElapsed += _bleAdapter_ScanTimeoutElapsed;
        }

        private void _bleAdapter_ScanTimeoutElapsed(object sender, EventArgs e)
        {
            _bleAdapter.StopScanningForDevices();
            DisplayInformation("Bluetooth scan timeout elapsed, no ble devices were found");
        }

        private void _bleAdapter_DeviceDiscovered(object sender, DeviceDiscoveredEventArgs e)
        {
            var msg = string.Format(@"Device found: {0}
  {1} - {2}", e.Device.Name, e.Device.ID, e.Device.Rssi);
            DisplayInformation(msg);
        }

        private void ButtonScanBleClick(object sender, EventArgs e)
        {
            if (!_bleAdapter.IsScanning)
                _bleAdapter.StartScanningForDevices();
        }

        private void DisplayInformation(string line)
        {
            _textboxResults.Text = $"{line}\r\n{_textboxResults.Text}";
            Console.WriteLine(line);
        }

我的输出结果图片Here

Answer 1

如果我理解得很好，您需要一些过滤器来查找已找到的设备。你必须写一个蓝牙扫描仪回调，然后是这样的:

回调中:

public void OnLeScan(BluetoothDevice device, int rssi, byte[] scanRecord)
        {
            if (device.Name != null)
            {
                EventScanDevice(device, rssi);                
            }
        }

在 MainActivity 中:

List<string> scanList;

private void Scanner_EventScanDevice(BluetoothDevice device, int rssi)
{
 if (!scanList.Contains(device.Name))
 {
      scanList.Add(device.Name + ", RSSI = " + rssi.ToString());
              
 }
}