Hello!
I need to scan the wifi programatically and return a list of all SSID's I get. I've read about it and concluded I can't make it on iOS in a way I can publish the App on the Apple Store(ref).
So, I decided to at least implement it for Android Users, I'm trying to implement via Dependency Service but I'm doing it wrong, here is what I'm doing:
This is the Wifi.cs class in the Android project:
using AirSenseApp.Services;
using Android.Content;
using Android.Net.Wifi;
using System.Collections.Generic;
[assembly: Xamarin.Forms.Dependency(typeof(AirSenseApp.Droid.Classes.Wifi))]
namespace AirSenseApp.Droid.Classes
{
public class Wifi:IWifi
{
private Context context = null;
private static WifiManager wifi;
private WifiReceiver wifiReceiver;
public static List<string> WiFiNetworks;
public Wifi(Context ctx)
{
this.context = ctx;
}
public void GetWifiNetworks()
{
WiFiNetworks = new List<string>();
// Get a handle to the Wifi
wifi = (WifiManager)context.GetSystemService(Context.WifiService);
// Start a scan and register the Broadcast receiver to get the list of Wifi Networks
wifiReceiver = new WifiReceiver();
context.RegisterReceiver(wifiReceiver, new IntentFilter(WifiManager.ScanResultsAvailableAction));
wifi.StartScan();
}
public class WifiReceiver:BroadcastReceiver
{
public override void OnReceive(Context context, Intent intent)
{
IList<ScanResult> scanwifinetworks = wifi.ScanResults;
foreach(ScanResult wifinetwork in scanwifinetworks)
{
WiFiNetworks.Add(wifinetwork.Ssid);
}
}
}
}
}
This is my Interface that I'm trying to implement on the PCL project:
using System;
using System.Collections.Generic;
using System.Text;
namespace AirSenseApp.Services
{
public interface IWifi
{
void GetWifiNetworks();
}
}
Is this the correct way to implement it? I tried to put it in my ViewModel this way:
public class CreateDeviceViewModel:INotifyPropertyChanged
{
private readonly IWifi _wifiService;
public CreateDeviceViewModel()
{
this._wifiService = DependencyService.Get<IWifi>();
}
public ScanWifiButtonPressed()
{
_wifiService.GetWifiNetworks();
}
}
But I receive this error:
[0:] System.MissingMethodException: Default constructor not found for type AirSenseApp.Droid.Classes.Wifi
This means I'm not implementing the Wifi.cs in the Android project in the correct way or the problem is in the Interface?
