藍牙 LE 掃描儀 Xamarin Android

Question

我想用我的應用程序做的是能夠讀取掃描設備的特征。 我能夠掃描設備，但掃描將繼續接收它發現的任何內容。 所以我也想要一個過濾器。 我的結果的附加圖片位於我的代碼下方。

這是我的代碼

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);
        }

我的輸出結果圖片在這里

Answer 1

如果我理解得很好，您需要對找到的設備進行一些過濾。 你必須寫一個藍牙掃描器回調，然后是這樣的：

在回調中：

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

在主活動中：

List<string> scanList;

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