Question

在Xamarina中是否可以获取附近所有可用wifi的信号强度信息？我正在开发一个收集和处理有关附近wifi网络信息的应用程序。我也想获得此信息而不必连接到给定的网络。

编辑：这是代码，带有wifi信息的容器始终为空。

using Android.App;
using Android.OS;
using Android.Support.V7.App;
using Android.Runtime;
using Android.Widget;
using Android.Net.Wifi;
using Android.Support.V4.Content;
using Java.Util.Jar;
using Android.Support.V4.App;
using System.Collections.Generic;

namespace AppTut
{
    [Activity(Label = "@string/app_name", Theme = "@style/AppTheme", MainLauncher = true)]
    public class MainActivity : AppCompatActivity
    {
        WifiManager wifimanager;
        WifiReceiver wifireceiver;
        IList<ScanResult> resultList;


        protected override void OnCreate(Bundle savedInstanceState)
        {
            base.OnCreate(savedInstanceState);
            Xamarin.Essentials.Platform.Init(this, savedInstanceState);
            // Set our view from the "main" layout resource
            SetContentView(Resource.Layout.activity_main);

            wifimanager = (WifiManager)GetSystemService(WifiService);
            wifireceiver = new WifiReceiver();

            RegisterReceiver(wifireceiver, new Android.Content.IntentFilter(WifiManager.ScanResultsAvailableAction));

            //if (ContextCompat.CheckSelfPermission(ApplicationContext, "Man") != PackageManager.permis)

            if (ApplicationContext.CheckCallingOrSelfPermission(Android.Manifest.Permission.AccessFineLocation) != Android.Content.PM.Permission.Granted)
            {
                ActivityCompat.RequestPermissions(this, new string[] { Android.Manifest.Permission.AccessFineLocation }, 0);
            }
            else
            {
                scanWifiList();
            }

        }

        private void scanWifiList()
        {
            wifimanager.StartScan();
            resultList = wifimanager.ScanResults;

            foreach(var spot in resultList)
            {
                var wifiLevel = WifiManager.CalculateSignalLevel(spot.Level, 100);
                System.Diagnostics.Debug.WriteLine($"SSID: {spot.Ssid} - Signal: {wifiLevel}");
            }
        }
        public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Android.Content.PM.Permission[] grantResults)
        {
            Xamarin.Essentials.Platform.OnRequestPermissionsResult(requestCode, permissions, grantResults);

            base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
        }
    }
}

using Android.Content;

namespace AppTut
{
    class WifiReceiver : BroadcastReceiver
    {
        public override void OnReceive(Context context, Intent intent)
        {

        }
    }
}

Answer 1

在Xamarin.Android中，您可以使用以下代码获取Wifi连接及其强度（从0到100）。

using Android.Net.Wifi;

...

var wifiMgr = (WifiManager)GetSystemService(WifiService);

var wifiList = wifiMgr.ScanResults;
foreach (var item in wifiList)
{
    var wifiLevel = WifiManager.CalculateSignalLevel(item.Level, 100);
    Console.WriteLine($"Wifi SSID: {item.Ssid} - Strengh: {wifiLevel}");
}

您需要将以下两个权限添加到清单中：

ACCESS_FINE_LOCATION和ACCESS_WIFI_STATE

并确保您请求ACCESS_FINE_LOCATION的授权。

希望这会有所帮助。-

Xamarin获得wifi信号强度

1 个答案: