WebView In Flutter

In this blog, we will discuss how we can achieve Webview in our flutter app. WebViews are mobile components where HTML content is rendered over a browser inside a mobile app. We will use the webview_flutter plugin to show web pages in our app.

webview_flutter is a Flutter plugin. It provides a WebView widget on Android and iOS. WebView widget has the following properties.

Properties of WebView

onWebViewCreated: This function is invoked once when the web view is created.

initialUrl: The initial URL of the web resource.

javascriptMode: It is used to enable JavaScript in the WebView.

javascriptChannels: The set of JavascriptChannels available to JavaScript code running in the WebView.

navigationDelegate: A delegate function that decides how to handle navigation actions.

onPageStarted: This function is invoked when a page starts loading.

onPageFinished: This function is invoked when a page has finished loading.

onProgress: This function invoked when a page loading started.

debuggingEnabled: It is use to Controls debugging in WebView by doing its value true but the default debuggingEnabled is false.

gestureNavigationEnabled: A Boolean value indicating whether horizontal swipe gestures will trigger back-forward list navigations. Its default value is false.

allowsInlineMediaPlayback: Inline playback of HTML5 videos controlled by this property on iOS. Android allows it by default. Its default value is false.

zoomEnabled: It indicates whether the WebView should support zooming using its on-screen zoom controls and gestures. Its default value is true.

backgroundColor: The background color of the WebView.

Step to integrate WebView in Flutter

Step-1 -> Firstly, add the webview_flutter dependency in the pubspec.yaml file.

  webview_flutter: ^3.0.0

1	webview_flutter: ^3.0.0

Step– 2 -> Run ‘flutter pub get‘ command.

After this, we are ready to write our code.

main.dart

import 'package:flutter/material.dart';
import 'package:webview_flutter_demo/CommonWebView.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',
      home: const MyHomePage(title: 'Flutter WebView'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);

  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: Padding(
        padding: const EdgeInsets.all(8.0),
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          crossAxisAlignment: CrossAxisAlignment.stretch,
          children: [
            MaterialButton(
              color: Colors.blue,
              onPressed: () {
                Navigator.push(
                    context,
                    MaterialPageRoute(
                        builder: (context) => CommonWebView(
                            url: "https://flutter.dev", title: "Flutter")));
              },
              child: Text(
                'https://flutter.dev',
                style: TextStyle(fontSize: 16),
              ),
            ),
            MaterialButton(
              color: Colors.blue,
              onPressed: () {
                Navigator.push(
                    context,
                    MaterialPageRoute(
                        builder: (context) => CommonWebView(
                            url:
                                "https://en.wikipedia.org/wiki/Flutter_(software)",
                            title: "Wikipedia")));
              },
              child: Text(
                "https://en.wikipedia.org/wiki/Flutter",
                style: TextStyle(fontSize: 16),
              ),
            )
          ],
        ),
      ),
    );
  }
}

import 'package:flutter/material.dart';

import 'package:webview_flutter_demo/CommonWebView.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',

home: const MyHomePage(title: 'Flutter WebView'),

);

}

class MyHomePage extends StatefulWidget {

const MyHomePage({Key? key, required this.title}) : super(key: key);

final String title;

@override

State<MyHomePage> createState() => _MyHomePageState();

}

class _MyHomePageState extends State<MyHomePage> {

@override

Widget build(BuildContext context) {

return Scaffold(

appBar: AppBar(

title: Text(widget.title),

body: Padding(

padding: const EdgeInsets.all(8.0),

child: Column(

mainAxisAlignment: MainAxisAlignment.center,

crossAxisAlignment: CrossAxisAlignment.stretch,

children: [

MaterialButton(

color: Colors.blue,

onPressed: () {

Navigator.push(

context,

MaterialPageRoute(

builder: (context) => CommonWebView(

url: "https://flutter.dev", title: "Flutter")));

child: Text(

'https://flutter.dev',

style: TextStyle(fontSize: 16),

MaterialButton(

color: Colors.blue,

onPressed: () {

Navigator.push(

context,

MaterialPageRoute(

builder: (context) => CommonWebView(

url:

"https://en.wikipedia.org/wiki/Flutter_(software)",

title: "Wikipedia")));

child: Text(

"https://en.wikipedia.org/wiki/Flutter",

style: TextStyle(fontSize: 16),

)

);

}

common_webview.dart



import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';

class CommonWebView extends StatefulWidget {
  final String url;
  final String title;
  CommonWebView({required this.url, required this.title});
  @override
  _CommonWebViewState createState() => _CommonWebViewState();
}

class _CommonWebViewState extends State<CommonWebView> {
  WebViewController? _controller;
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
        body: WebView(
           zoomEnabled: true ,
           initialUrl: widget.url,
           javascriptMode: JavascriptMode.unrestricted,
           onWebViewCreated: (WebViewController webViewController){
             _controller = webViewController;
             },
          )
    );
  }
}

import 'package:flutter/material.dart';

import 'package:webview_flutter/webview_flutter.dart';

class CommonWebView extends StatefulWidget {

final String url;

final String title;

CommonWebView({required this.url, required this.title});

@override

_CommonWebViewState createState() => _CommonWebViewState();

}

class _CommonWebViewState extends State<CommonWebView> {

WebViewController? _controller;

@override

Widget build(BuildContext context) {

return Scaffold(

appBar: AppBar(

title: Text(widget.title),

body: WebView(

zoomEnabled: true ,

initialUrl: widget.url,

javascriptMode: JavascriptMode.unrestricted,

onWebViewCreated: (WebViewController webViewController){

_controller = webViewController;

)

);

}

While running the app, you may face issue related to minSdkVersion. To solve this issue, you should correct the value of minSdkVersion in android/app/build.gradle.

android {
    defaultConfig {
        minSdkVersion 19
    }
}

android {

defaultConfig {

minSdkVersion 19

}

The output of the code is –

Conclusion

In this blog, we have read about the WebView in Flutter.

I hope it will help you out in understanding and getting a brief idea about flutter Webview.

Thank you for reading!!

webview

Mohit Kumar 25 January 2022

. . .

WebView In Flutter

Properties of WebView

Step to integrate WebView in Flutter

Conclusion

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