How to open a web page url in Flutter WebView

In flutter mobile, webview is an important Flutter API which comes in handy when html tags that are not supported by Text widget needs to be displayed in an app.

Two major usage of flutter webview is either to open a locally stored html file or display a remote web page using the web url.

The previous flutter code example explores how to load and display locally store html file in flutter webview.

Here, we will learn how to open a remote web page using the web page url.

To make it a bit dynamic, we are going the let the user add the web page url to visit.

Once entered, the user will need to click a submit button which will navigate to another page where the web page will be displayed.

This is a simple code example to give some insights on how to go about implementing this solution.

Feel free to use and modify the source code to suit your project requirement.

1. Add flutter_webview plugin in pubspec.yaml

name: flutter_app
description: A new Flutter application.

# The following defines the version and build number for your application.
# A version number is three numbers separated by dots, like 1.2.43
# followed by an optional build number separated by a +.
# Both the version and the builder number may be overridden in flutter
# build by specifying --build-name and --build-number, respectively.
# Read more about versioning at semver.org.
version: 1.0.0+1

environment:
  sdk: ">=2.0.0-dev.68.0 <3.0.0"

dependencies:
  flutter:
    sdk: flutter

  # The following adds the Cupertino Icons font to your application.
  # Use with the CupertinoIcons class for iOS style icons.
  cupertino_icons: ^0.1.2
  http: 0.12.0
  ##sqflite: 0.13.0+1
  path_provider: 0.4.1
  ##zoomable_image: 1.2.1+1
  ##multi_image_picker: 2.3.32
  dio: 2.0.22
  shared_preferences: 0.4.3
  flare_flutter: any
  flutter_webview_plugin: 0.3.0+2
  webview_flutter: 0.2.0


dev_dependencies:
  flutter_test:
    sdk: flutter


# For information on the generic Dart part of this file, see the
# following page: https://www.dartlang.org/tools/pub/pubspec

# The following section is specific to Flutter.
flutter:

  # The following line ensures that the Material Icons font is
  # included with your application, so that you can use the icons in
  # the material Icons class.
  uses-material-design: true

  assets:
    - assets/html_code.html
    - assets/iframe.html
    - assets/js_lib.html


  # To add assets to your application, add an assets section, like this:
  # assets:
  #  - images/a_dot_burr.jpeg
  #  - images/a_dot_ham.jpeg

  # An image asset can refer to one or more resolution-specific "variants", see
  # https://flutter.io/assets-and-images/#resolution-aware.

  # For details regarding adding assets from package dependencies, see
  # https://flutter.io/assets-and-images/#from-packages

  # To add custom fonts to your application, add a fonts section here,
  # in this "flutter" section. Each entry in this list should have a
  # "family" key with the font family name, and a "fonts" key with a
  # list giving the asset and other descriptors for the font. For
  # example:
  # For details regarding fonts from package dependencies,
  # see https://flutter.io/custom-fonts/#from-packages

2. Create main.dart if it does not already exist

This is the entry point of our application. Open the file and add the code below.

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

void main() => runApp(MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      debugShowCheckedModeBanner: false,
      theme: ThemeData(
        // This is the theme of your application.
        //
        // Try running your application with "flutter run". You'll see the
        // application has a blue toolbar. Then, without quitting the app, try
        // changing the primarySwatch below to Colors.green and then invoke
        // "hot reload" (press "r" in the console where you ran "flutter run",
        // or simply save your changes to "hot reload" in a Flutter IDE).
        // Notice that the counter didn't reset back to zero; the application
        // is not restarted.
        primarySwatch: Colors.blue,
      ),
      home: OpenWebPageUrl(),
    );
  }
}

In the above code, the new dart class we will create later is assigned to the home property of the MaterialAppwidget. Lets create the OpenWebPageUrlclass.

3. Create openwebpage.dart in lib folder

Create a new dart file in the lib directory. I will name mine openwebpage.dart. You can use a name of your choice.

Open the file and add the code below.

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

class OpenWebPageUrl extends StatelessWidget {
  TextEditingController _textController =
      TextEditingController(text: 'https://');
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(title: Text("Open Web Page URL in webview")),
      body: Center(
          child: Column(
        children: <Widget>[
          Padding(
            padding: const EdgeInsets.all(20.0),
            child: TextField(
              controller: _textController,
            ),
          ),
          RaisedButton(
            child: Text("Goto Webpage"),
            color: Colors.red,
            onPressed: () {
              Navigator.of(context).push(
                  MaterialPageRoute<Null>(builder: (BuildContext context) {
                return new WebViewWebPage(url: _textController.text);
              }));
            },
          ),
        ],
      )),
    );
  }
}

class WebViewWebPage extends StatelessWidget {
  final String url;

  WebViewWebPage({this.url});

  @override
  Widget build(BuildContext context) {
    return WebviewScaffold(
      url: url,
      hidden: true,
      appBar: AppBar(title: Text("Open Web Page URL in webview")),
    );
  }
}

4. Run your app

You can use flutter command to run your app – $ flutter run

If everything goes well, you will see a website similar to the image below in your flutter webview.

If you have any question or suggestions kindly use the comment box or you can contact us directly through our contact page below.

 

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