title: Flutter i get an net:: ERR_UNKNOWN_URL_SCHEME when i click on a tel or mailto link on the website that is wrapped in the flutter webview
body: <p>hi I wrapped my website inside a flutter webview but when i tab on a tel or mailto link then the app throws an error </p>
  
  <p>the web page at tel: could not be loaded because net:: ERR_UNKNOWN_URL_SCHEME can someone please help me fix the problem the code below is my app with all the packages i am using i am very new to app development and i will really appreciate some help</p>
  
  <p>Thank in advanced 
  Kind Regards.</p>
  
  <pre><code>import 'package:flutter/material.dart';
  import 'package:flutter_webview_plugin/flutter_webview_plugin.dart';
  import 'package:splashscreen/splashscreen.dart';
  import 'package:flutter/rendering.dart';
  import 'package:flutter/services.dart';
  import 'package:url_launcher/url_launcher.dart';
  
  void main() {enter code here
    SystemChrome.setPreferredOrientations([DeviceOrientation.portraitUp]);
    runApp(MaterialApp(
        home: MyApp(),
        debugShowCheckedModeBanner: false,
        theme: ThemeData(
          fontFamily: 'Bungee',
          primaryTextTheme: TextTheme(
            title: TextStyle(color: Colors.yellow, fontSize: 24),
          ),
        )));
  }
  
  class MyApp extends StatefulWidget {
    @override
    _MyAppState createState() =&gt; new _MyAppState();
  }
  
  class _MyAppState extends State&lt;MyApp&gt; {
    @override
    Widget build(BuildContext context) {
      return new SplashScreen(
        seconds: 20,
        navigateAfterSeconds: AfterSplash(),
        image: new Image.asset(
          'assets/images/icon.png',
          width: 100,
          height: 100,
        ),
        backgroundColor: Colors.blueGrey[800],
        photoSize: 100.0,
        loaderColor: Colors.yellow[300],
      );
    }
  }
  
  class AfterSplash extends StatefulWidget {
    @override
    _MyAppsState createState() =&gt; _MyAppsState();
  }
  
  class _MyAppsState extends State&lt;AfterSplash&gt; {
    @override
    Widget build(BuildContext context) {
      return SafeArea(
        child: WebviewScaffold(
          // Enter your custom url
          url: "https://appdev.quintechx.tk/",
          withJavascript: true,
          withLocalStorage: true,
          enableAppScheme: true,
          primary: true,
          supportMultipleWindows: true,
          allowFileURLs: true,
          withLocalUrl: true,
          scrollBar: false,
          appCacheEnabled: true,
        ),
      );
    }
  }
  </code></pre>