flutter_webview_lite 0.0.1

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  • Changelog
  • Example
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flutter_webview_lite #

A new Flutter plugin.

Getting Started #

This project is a starting point for a Flutter plug-in package, a specialized package that includes platform-specific implementation code for Android and/or iOS.

For help getting started with Flutter, view our online documentation, which offers tutorials, samples, guidance on mobile development, and a full API reference.

0.0.1 #

  • TODO: Describe initial release.

example/lib/main.dart

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

import 'package:flutter_webview_lite/flutter_webview_lite.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',
      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: LayoutDemo(),
    );
  }
}

class LayoutDemo extends StatefulWidget {
  @override
  _LayoutDemoState createState() => _LayoutDemoState();
}

class _LayoutDemoState extends State<LayoutDemo> {
  final flutterWebViewLite = FlutterWebViewLite();

  StreamSubscription _onSource;
  // On destroy stream
  StreamSubscription _onDestroy;

  // On urlChanged stream
  StreamSubscription<String> _onUrlChanged;

  // On urlChanged stream
  StreamSubscription<WebViewStateChanged> _onStateChanged;

  StreamSubscription<WebViewHttpError> _onHttpError;

  StreamSubscription<double> _onProgressChanged;

  StreamSubscription<double> _onScrollYChanged;

  StreamSubscription<double> _onScrollXChanged;

  final _scaffoldKey = GlobalKey<ScaffoldState>();

  final _history = [];

  void parseResult() {

  }

  @override
  void initState() {
    super.initState();
    flutterWebViewLite.close();

    _onSource = flutterWebViewLite.onSource.listen((String html) {
      if (mounted) {
        setState(() {
          _history.add('onSource: $html');
        });
      }
    });
// Add a listener to on destroy WebView, so you can make came actions.
    _onDestroy = flutterWebViewLite.onDestroy.listen((_) {
      if (mounted) {
        // Actions like show a info toast.
        _scaffoldKey.currentState.showSnackBar(
            const SnackBar(content: const Text('Webview Destroyed')));
      }
    });

    // Add a listener to on url changed
    _onUrlChanged = flutterWebViewLite.onUrlChanged.listen((String url) {
      if (mounted) {
        setState(() {
          _history.add('onUrlChanged: $url');
        });
      }
    });

    _onProgressChanged =
        flutterWebViewLite.onProgressChanged.listen((double progress) {
          if (mounted) {
            setState(() {
              _history.add("onProgressChanged: $progress");
            });
          }
        });

    _onScrollYChanged =
        flutterWebViewLite.onScrollYChanged.listen((double y) {
          if (mounted) {
            setState(() {
              _history.add('Scroll in Y Direction: $y');
            });
          }
        });

    _onScrollXChanged =
        flutterWebViewLite.onScrollXChanged.listen((double x) {
          if (mounted) {
            setState(() {
              _history.add('Scroll in X Direction: $x');
            });
          }
        });

    _onStateChanged =
        flutterWebViewLite.onStateChanged.listen((WebViewStateChanged state) {
          if (mounted) {
            setState(() {
              _history.add('onStateChanged: ${state.type} ${state.url}');
            });

            // state.type是一个枚举类型,取值有:WebViewState.shouldStart, WebViewState.startLoad, WebViewState.finishLoad
            switch (state.type) {
              case WebViewState.shouldStart:
              // 准备加载
                break;
              case WebViewState.startLoad:
              // 开始加载
                break;
              case WebViewState.finishLoad:
              // 加载完成
              // 当前是回调页面,则调用js方法获取数据
              // parseResult();
              // flutterWebViewPlugin.evalJavascript();
                break;
              case WebViewState.abortLoad:
                break;
            }
          }
        });

    _onHttpError =
        flutterWebViewLite.onHttpError.listen((WebViewHttpError error) {
          if (mounted) {
            setState(() {
              _history.add('onHttpError: ${error.code} ${error.url}');
            });
          }
        });
  }

  @override
  void dispose() {
    // Every listener should be canceled, the same should be done with this stream.
    _onDestroy.cancel();
    _onUrlChanged.cancel();
    _onStateChanged.cancel();
    _onHttpError.cancel();
    _onProgressChanged.cancel();
    _onScrollXChanged.cancel();
    _onScrollYChanged.cancel();
    _onSource.cancel();
    flutterWebViewLite.dispose();

    super.dispose();
  }

  @override
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: Text('层叠定位布局'),
      ),
      body: SingleChildScrollView(
        child: Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: [
            RaisedButton(
              child: const Text('Open Webview (rect)'),
              onPressed: () {
                flutterWebViewLite.launch(
                  "https://m.quanben.net/273/273204/30383212.html",
                  hidden: true,
                  // rect: Rect.fromLTWH(0.0, 0.0, MediaQuery.of(context).size.width, 300.0),
                  // userAgent: kAndroidUserAgent,
                  // invalidUrlRegex: r'^(https).+(twitter)', // prevent redirecting to twitter when user click on its icon in flutter website
                );
              },
            ),
            Text(_history.join('\n'))
          ],
        ),
      ),
    );
  }
}

Use this package as a library

1. Depend on it

Add this to your package's pubspec.yaml file:


dependencies:
  flutter_webview_lite: ^0.0.1

2. Install it

You can install packages from the command line:

with Flutter:


$ flutter pub get

Alternatively, your editor might support flutter pub get. Check the docs for your editor to learn more.

3. Import it

Now in your Dart code, you can use:


import 'package:flutter_webview_lite/flutter_webview_lite.dart';
  
Popularity:
Describes how popular the package is relative to other packages. [more]
0
Health:
Code health derived from static analysis. [more]
100
Maintenance:
Reflects how tidy and up-to-date the package is. [more]
70
Overall:
Weighted score of the above. [more]
44
Learn more about scoring.

We analyzed this package on Apr 1, 2020, and provided a score, details, and suggestions below. Analysis was completed with status completed using:

  • Dart: 2.7.1
  • pana: 0.13.6
  • Flutter: 1.12.13+hotfix.8

Health suggestions

Format lib/src/base.dart.

Run flutter format to format lib/src/base.dart.

Maintenance suggestions

The package description is too short. (-20 points)

Add more detail to the description field of pubspec.yaml. Use 60 to 180 characters to describe the package, what it does, and its target use case.

Package is pre-v0.1 release. (-10 points)

While nothing is inherently wrong with versions of 0.0.*, it might mean that the author is still experimenting with the general direction of the API.

Dependencies

Package Constraint Resolved Available
Direct dependencies
Dart SDK >=2.1.0 <3.0.0
flutter 0.0.0
Transitive dependencies
collection 1.14.11 1.14.12
meta 1.1.8
sky_engine 0.0.99
typed_data 1.1.6
vector_math 2.0.8
Dev dependencies
flutter_test