如何在 Xamarin.Forms 中获取连接的 SSID？

Question

我需要获取当前连接到的网络的SSID。

这是我用来在 Xamarin.Android 中查找 SSID 的代码：

WifiManager wifiManager = (WifiManager)(Application.Context.GetSystemService(WifiService));

if (wifiManager != null)
{
    var ssid =  wifiManager.ConnectionInfo.SSID;
}
else
{
    var str =  "WiFiManager is NULL";
}

但我需要在 Xamarin.Forms 中实现这一点。

我该怎么做？

Answer 1

您可以使用DependencyService。

DependencyService 类是一个服务定位器，它使 Xamarin.Forms 应用程序能够从共享代码调用本机平台功能。

1º 创建一个公共接口（为了组织，可能在Mobile > Services > IGetSSID下）

public interface IGetSSID
{
    string GetSSID();
}

2º创建 Android 实现

[assembly: Dependency(typeof(GetSSIDAndroid))]
namespace yournamespace
{
    public class GetSSIDAndroid : IGetSSID
    {
        public string GetSSID()
        {
            WifiManager wifiManager = (WifiManager)(Android.App.Application.Context.GetSystemService(Context.WifiService));

            if (wifiManager != null && !string.IsNullOrEmpty(wifiManager.ConnectionInfo.SSID))
            {
                return wifiManager.ConnectionInfo.SSID;
            }
            else
            {
                return "WiFiManager is NULL";
            }
        }
    }
}

3º 然后在你的表单中你会得到这样的 SSID：

var ssid = DependencyService.Get<IGetSSID>().GetSSID();

---

注意：不要忘记在您的 Android 清单中添加此权限

<uses-permission android:name="android.permission.ACCESS_WIFI_STATE" />

Answer 2

获取 SSID 和 BSSID API31 Xamarin C# 示例

所需权限：CHANGE_NETWORK_STATE、ACCESS_FINE_LOCATION

如果 APITransportInfo 将返回 Null

using Android.Content;
using Android.Net;
using Android.Net.Wifi;

protected override void OnStart()
    {
        base.OnStart();

        NetworkRequest request = new NetworkRequest.Builder().AddTransportType(transportType: TransportType.Wifi).Build();
        ConnectivityManager connectivityManager = Android.App.Application.Context.GetSystemService(Context.ConnectivityService) as ConnectivityManager;

        NetworkCallbackFlags flagIncludeLocationInfo = NetworkCallbackFlags.IncludeLocationInfo;
        NetworkCallback networkCallback = new NetworkCallback((int)flagIncludeLocationInfo);
        connectivityManager.RequestNetwork(request, networkCallback);
    }

    private class NetworkCallback : ConnectivityManager.NetworkCallback
    {
        public NetworkCallback(int flags) : base(flags)
        {
        }

        public override void OnCapabilitiesChanged(Network network, NetworkCapabilities networkCapabilities)
        {
            base.OnCapabilitiesChanged(network, networkCapabilities);
            WifiInfo wifiInfo = (WifiInfo)networkCapabilities.TransportInfo;

            if (wifiInfo != null)
            {
                string ssid = wifiInfo.SSID.Trim(new char[] {'"', '\"' });
                string bssid = wifiInfo.BSSID;
            }
        }
    }

点击Android API reference.ConnectivityManager.NetworkCallback(int)！