Flutter Webview : Alternate screen for inital url not loaded - flutter

Question

I need an alternate screen when my webpage not loaded;
Note: Webpage was hosting on localhost, so internet connectivity based changeover not possible.
Query: Can we ping IP and change over the screens
Any Possible ways to achieve this ?
** main.dart **
import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';
void main() => runApp(MyApp());
class MyApp extends StatelessWidget {
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'flutter webview',
home: Scaffold(
appBar: AppBar(
title: const Text('flutter webview'),
),
body: WebView(
initialUrl: "http://192.168.29.8/public/_weblogin.html",
javascriptMode: JavascriptMode.unrestricted)),
);
}
}

Answer 1

You can view alternative designs on onWebResourceError
full code:
import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
#override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
theme: ThemeData(
primarySwatch: Colors.blue,
),
home: const HomeView(),
);
}
}
class HomeView extends StatefulWidget {
const HomeView({Key? key}) : super(key: key);
#override
_HomeViewState createState() => _HomeViewState();
}
class _HomeViewState extends State<HomeView> {
bool isError = false;
#override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: const Text("Home"),
),
body: Stack(
children: [
if (!isError)
WebView(
initialUrl: 'http://192.168.29.8/public/_weblogin.html',
javascriptMode: JavascriptMode.unrestricted,
onWebResourceError: (error) => setState(() {
isError = true;
}),
),
if (isError) const Center(child: Text("WEB PAGE ERROR")),
],
),
);
}
}