iot/projects/Demo/Demo.Android/Infrastructure/HybridWebViewRenderer.cs

using Android.Content;
using Demo.Droid.Infrastructure;
using Demo.Infrastructure;
using Xamarin.Forms;
using Xamarin.Forms.Platform.Android;

[assembly: ExportRenderer(typeof(HybridWebView), typeof(HybridWebViewRenderer))]

namespace Demo.Droid.Infrastructure
{
    public class HybridWebViewRenderer : ViewRenderer<HybridWebView, Android.Webkit.WebView>
    {
        private const string JavascriptFunction = "function invokeCSharpAction(data){jsBridge.invokeAction(data);}";
        private Context _context;

        public HybridWebViewRenderer(Context context) : base(context)
        {
            _context = context;
        }

        protected override void OnElementChanged(ElementChangedEventArgs<HybridWebView> e)
        {
            base.OnElementChanged(e);

            if (Control == null)
            {
                var webView = new Android.Webkit.WebView(_context);
                webView.Settings.JavaScriptEnabled = true;
                webView.SetWebViewClient(new JavascriptWebViewClient($"javascript: {JavascriptFunction}"));
                SetNativeControl(webView);
            }
            if (e.OldElement != null)
            {
                Control.RemoveJavascriptInterface("jsBridge");
                var hybridWebView = e.OldElement as HybridWebView;
                hybridWebView.Cleanup();
            }
            if (e.NewElement != null)
            {
                Control.AddJavascriptInterface(new JSBridge(this), "jsBridge");
                Control.LoadUrl(Element.Uri);
            }
        }
    }
}