import 'package:flutter/material.dart'; import 'package:webview_flutter/webview_flutter.dart'; void main() { const title = String.fromEnvironment("APP_TITLE"); const uri = String.fromEnvironment("APP_URI"); const color = String.fromEnvironment("APP_COLOR"); runApp(const MyApp(title, uri, color)); } class MyApp extends StatelessWidget { final String _title; final String _uri; final String _color; const MyApp(this._title, this._uri, this._color, {Key? key}) : super(key: key); // This widget is the root of your application. @override Widget build(BuildContext context) { MaterialColor materialColor = this._getMaterialColor(this._color); return MaterialApp( title: this._title, theme: ThemeData(primarySwatch: materialColor), home: WebView( initialUrl: this._uri, javascriptMode: JavascriptMode.unrestricted, zoomEnabled: true, allowsInlineMediaPlayback: true, )); } MaterialColor _getMaterialColor(String colorString) { switch (colorString) { case "blue": return Colors.blue; case "red": return Colors.red; case "green": return Colors.green; case "yellow": return Colors.yellow; case "teal": return Colors.teal; default: return Colors.blue; } } }