Unable to capture audio from webview - xamarin

Question

I have a Xamarin Forms app that needs to capture audio from a webview. I have the following set in my manifest
<uses-permission android:name="android.permission.INTERNET" />
<uses-permission android:name="android.permission.AUDIO_CAPTURE" />
<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE" />
<uses-permission android:name="android.permission.ACCESS_COARSE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_FINE_LOCATION" />
<uses-permission android:name="android.permission.ACCESS_MOCK_LOCATION" />
<uses-permission android:name="android.permission.MICROPHONE" />
<uses-permission android:name="android.permission.RECORD_AUDIO" />
<uses-feature android:name="android.hardware.audio.low_latency" />
<uses-permission android:name="android.permission.MODIFY_AUDIO_SETTINGS" />
<uses-feature android:name="android.hardware.audio.pro" />
<uses-permission android:name="android.webkit.resource.AUDIO_CAPTURE" />
I have the following in the android webview custom renderer
protected override void OnElementChanged(ElementChangedEventArgs<WebView> e)
{
base.OnElementChanged(e);
Control.Download += OnDownload;
Control.Settings.JavaScriptEnabled = true;
Control.Settings.SetGeolocationEnabled(true);
Control.Settings.SetGeolocationDatabasePath(Control.Context.FilesDir.Path);
Control.Settings.SetSupportZoom(false);
Control.Settings.AllowFileAccess = true;
Control.Settings.AllowContentAccess =true;
Control.Settings.LoadWithOverviewMode = true;
Control.Settings.SetPluginState(Android.Webkit.WebSettings.PluginState.On);
if (e.OldElement == null)
{
ResetCookieManagerSettings();
var chromeClient = new ArenaWebChromeClient((uploadMsg, acceptType, capture) =>
{
var webViewClient = new WebViewClient(this);
if (App.Self.IsConnected)
{
Control.SetWebChromeClient(chromeClient);
webViewClient.PageLoadStarted += RaiseLoadStarted;
webViewClient.PageLoadFinished += RaiseLoadFinished;
Control.SetWebViewClient(webViewClient);
}
else
{
webViewClient.PageLoadStarted -= RaiseLoadStarted;
webViewClient.PageLoadFinished -= RaiseLoadFinished;
}
}
}
This is all fine. My Chrome code for checking the permissions is this
public override void OnPermissionRequest(PermissionRequest request)
{
base.OnPermissionRequest(request);
if (request != null)
{
permissionRequest = request;
var res = request.GetResources();
if (res.Length != 0)
{
foreach(var r in res)
{
if (r.Contains("AUDIO_CAPTURE"))
{
Device.BeginInvokeOnMainThread(async () =>
{
var perms = await Permissions.CheckStatusAsync<Permissions.Media>();
if (perms != Xamarin.Essentials.PermissionStatus.Granted)
{
var request = await Permissions.RequestAsync<Permissions.Media>();
if (request == Xamarin.Essentials.PermissionStatus.Granted)
{
var mod = await Permissions.CheckStatusAsync<Permissions.Microphone>();
if (mod != Xamarin.Essentials.PermissionStatus.Granted)
{
var t = await Xamarin.Essentials.PermissionRequestAsync<Permissions.Media>();
#if DEBUG
Console.WriteLine("Microphone set");
#endif
}
}
}
else
{
var mod = await Permissions.CheckStatusAsync<Permissions.Microphone>();
if (mod != Xamarin.Essentials.PermissionStatus.Granted)
{
var t = await Xamarin.Essentials.Permissions.RequestAsync<Permissions.Media>();
#if DEBUG
Console.WriteLine("Microphone set");
#endif
}
}
});
}
}
}
}
}
This all works. However. when I try to record via the webview, I'm getting the following error.
chromium] [INFO:CONSOLE(76)] "The following error occurred: NotAllowedError: Permission denied", source: https://mywebsite/myurl (76)
I'm not sure if it's on the server side or app side as when the user on the website tries to record, a recording is made.