1. 安装插件 flutter_webview_plugin: ^0.2.1
2. 跳转页面
   Navigator.push(context, MaterialPageRoute(builder: (BuildContext context) { return Web(); }));
3. web页面

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

class Web extends StatefulWidget {
  String url;
  String title;

  Web({Key key, this.url, this.title}) : super(key: key);

  @override
  State<StatefulWidget> createState() {
    // TODO: implement createState
    return _WebPageState();
  }
}

class _WebPageState extends State<Web> {
  FlutterWebviewPlugin flutterWebviewPlugin = FlutterWebviewPlugin();

  @override
  void initState() {
    super.initState();
  }

  @override
  Widget build(BuildContext context) {
    // TODO: implement build
    return WebviewScaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      url: widget.url,
      withJavascript: true,
      scrollBar: false,
      withZoom: false,
    );
  }

  @override
  void dispose() {
    flutterWebviewPlugin.dispose();
    super.dispose();
  }
}