private static Radio?GetRadiosWiFiOrCellular(RadioKind radioKind)
{
var context = Android.App.Application.Context;
var pkgManager = context.PackageManager;
if (pkgManager is null)
{
// required by #nullable
return(null);
}
string systemFeature;
if (radioKind == RadioKind.WiFi)
{
systemFeature = Android.Content.PM.PackageManager.FeatureWifi;
}
else
{
systemFeature = Android.Content.PM.PackageManager.FeatureTelephony;
}
if (!pkgManager.HasSystemFeature(systemFeature))
{
if (typeof(Radio).Log().IsEnabled(Microsoft.Extensions.Logging.LogLevel.Debug))
{
typeof(Radio).Log().Debug("GetRadiosWiFiOrCellular(" + radioKind.ToString() + "): this device doesn't have any interface of this kind");
}
return(null);
}
var radio = new Radio();
radio.Kind = radioKind;
if (radioKind == RadioKind.WiFi)
{
radio.Name = "Wi-Fi"; // name as in UWP
}
else
{
radio.Name = "Cellular"; // I have "Cellular 6" (Lumia 532), but maybe "6" doesn't mean anything
}
if (!Windows.Extensions.PermissionsHelper.IsDeclaredInManifest(Android.Manifest.Permission.AccessNetworkState))
{
if (typeof(Radio).Log().IsEnabled(Microsoft.Extensions.Logging.LogLevel.Warning))
{
typeof(Radio).Log().Debug("GetRadiosWiFiOrCellular(" + radioKind.ToString() + "): no 'AccessNetworkState' permission, check app Manifest");
}
radio.State = RadioState.Unknown;
return(radio);
}
var sysService = context.GetSystemService(Android.Content.Context.ConnectivityService);
if (sysService is null)
{
if (typeof(Radio).Log().IsEnabled(Microsoft.Extensions.Logging.LogLevel.Warning))
{
typeof(Radio).Log().Debug("GetRadiosWiFiOrCellular(" + radioKind.ToString() + "): GetSystemService returns null, assuming no radio");
}
return(null);
}
var connManager = (Android.Net.ConnectivityManager)sysService;
if (connManager is null)
{
if (typeof(Radio).Log().IsEnabled(Microsoft.Extensions.Logging.LogLevel.Warning))
{
typeof(Radio).Log().Debug("GetRadiosWiFiOrCellular(" + radioKind.ToString() + "): Android.Net.ConnectivityManager is null, assuming no WiFi radio");
}
return(null);
}
if (Android.OS.Build.VERSION.SdkInt > Android.OS.BuildVersionCodes.LollipopMr1)
{
// since API 23
var radiostate = GetRadioStateForNet(connManager, radioKind);
if (radiostate is null || !radiostate.HasValue)
{
// detailed Log entry already done in GetRadioStateForNet
return(null);
}
if (radiostate.Value)
{
radio.State = RadioState.On;
}
else
{
radio.State = RadioState.Off;
}
return(radio);
}
else
{
// for Android API 1 to 28 (deprecated in 29)
#pragma warning disable CS0618 // Type or member is obsolete
var netInfo = connManager.ActiveNetworkInfo;
if (netInfo is null)
{
radio.State = RadioState.Off;
}
else
{
radio.State = RadioState.Off;
if (radioKind == RadioKind.WiFi)
{
if (netInfo.Type == Android.Net.ConnectivityType.Wifi ||
netInfo.Type == Android.Net.ConnectivityType.Wimax)
{
radio.State = RadioState.On;
}
}
else
{
if (netInfo.Type == Android.Net.ConnectivityType.Mobile)
{
radio.State = RadioState.On;
}
}
#pragma warning restore CS0618 // Type or member is obsolete
}
return(radio);
}
}
private static bool?GetRadioStateForNet(Android.Net.ConnectivityManager connManager, RadioKind radioKind)
{
var activeNetwork = connManager.ActiveNetwork;
if (activeNetwork is null)
{
if (typeof(Radio).Log().IsEnabled(Microsoft.Extensions.Logging.LogLevel.Warning))
{
typeof(Radio).Log().Debug("GetRadioStateForNet(): ActiveNetwork is null, assuming no radio");
}
return(null);
}
var netCaps = connManager.GetNetworkCapabilities(activeNetwork);
if (netCaps is null)
{
if (typeof(Radio).Log().IsEnabled(Microsoft.Extensions.Logging.LogLevel.Debug))
{
typeof(Radio).Log().Debug("GetRadioStateForNet(): GetNetworkCapabilities is null, assuming no radio");
}
return(null);
}
if (radioKind == RadioKind.WiFi)
{
return(netCaps.HasTransport(Android.Net.TransportType.Wifi));
}
else
{
return(netCaps.HasTransport(Android.Net.TransportType.Cellular));
}
}
