Introduction

The WebView plugin allows you to display a webpage within your Flutter application.

In this tutorial, you will create a custom Widget that can be used throughout your application to launch a WebView from anywhere.

Prerequisites

To complete this tutorial, you will need:

• To download and install Flutter.
• To download and install Android Studio.
• flutter doctor will also recommend:
  • Flutter and Dart plugins installed for Android Studio.
  • Flutter extension installed for Visual Studio Code.

brew install flutter
brew cask install android-studio

This tutorial was verified with Flutter v1.22.2, Android SDK v30.0.2, and Android Studio v4.1.

Step 1 — Setting Up the Project

Once you have your environment set up for Flutter, you can run the following to create a new application:

flutter create flutter_webview_example

Navigate to the new project directory:

cd flutter_webview_example

Using flutter create will produce a demo application that will display the number of times a button is clicked.

Open pubspec.yaml in your code editor and add the following plugin:

dependencies:
  flutter:
    sdk: flutter

  webview_flutter: ^1.0.5

With this setup complete, you can create the widget that will trigger and display the WebView.

Step 2 — Scaffolding the Project

Next, you will need to update the main.dart file and create a new home_page.dart file.

Open main.dart in your code editor and import home_page.dart and change the home from MyHomePage to HomePage:

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

void main() {
  runApp(MyApp());
}

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
        visualDensity: VisualDensity.adaptivePlatformDensity,
      ),
      home: HomePage(),
    );
  }
}

Then, create a new home_page.dart file and add the following code:

import 'package:flutter/material.dart';

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Home Page"),
      ),
      body: Center(
        child: FlatButton(
          child: Text("Open Webpage"),
          onPressed: () {},
        ),
      ),
    );
  }
}

Compile your code and have it run in an emulator. This code will create a FlatButton with the message "Open Webpage".

Step 3 — Using the WebView Plugin

The next step will be to create a StatelessWidget named MyWebView to display WebView data.

Create a new my_webview.dart file and add the following code:

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

class MyWebView extends StatelessWidget {
  final String title;
  final String selectedUrl;

  final Completer<WebViewController> _controller = Completer<WebViewController>();

  MyWebView({
    @required this.title,
    @required this.selectedUrl,
  });

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text(title),
      ),
      body: WebView(
        initialUrl: selectedUrl,
        javascriptMode: JavascriptMode.unrestricted,
        onWebViewCreated: (WebViewController webViewController) {
          _controller.complete(webViewController);
        },
      ));
  }
}

For this tutorial, you will navigate the user to https://www.digitalocean.com/. Use Navigator.push with selectedUrl set to "https://www.digitalocean.com/".

Revisit home_page.dart and add MyWebView:

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

class HomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text("Home Page"),
      ),
      body: Center(
        child: FlatButton(
          child: Text("Open Webpage"),
          onPressed: () {
            Navigator.of(context).push(MaterialPageRoute(
              builder: (BuildContext context) => MyWebView(
                title: "DigitalOcean",
                selectedUrl: "https://www.digitalocean.com",
              )
            ));
          },
        ),
      ),
    );
  }
}

Compile your code and have it run in an emulator:

After interacting with the Open Webpage button, you will see the DigitalOcean website displayed in your Flutter application.

Conclusion

In this tutorial, you used the WebView package to display a webpage in your Flutter application.

If you’d like to learn more about Flutter, check out our Flutter topic page for exercises and programming projects.