Xamarin Android two way communication between Javascript and C#

Question

I am developing an app using Xamarin Android which has a WebView displaying a web page. I want to implement a two way communication between Javascript from WebView to c#. I

Answer 1

Yes. That is possible. If you are targeting KitKat or higher you can use:

webView.EvaluateJavascript("enable();", null);

Where in this case enable(); is a JS function.

If you are targeting lower API levels you can use LoadUrl();:

webView.LoadUrl("javascript:enable();");

EDIT:

The error you get where it complains on LoadUrl is because it for some reason happens on a non-UI thread.

Since you have already passed on the Context into your JavascriptInterface class, then you can simply wrap the contents of ShowToast in:

context.RunOnUiThread(() => {
   // stuff here
});

Just change signature from Context to Activity and it should help you marshal you back on UI thread.