在 assets 创建需要访问 html 文件，如下

这里创建一个files文件夹，专门来放这些静态 html 文件.

在 pubspec.yaml 中配置访问位置

assets:  - assets/images/  - assets/files/

在 pubspec.yaml 添加 webview_flutter 插件依赖

webview_flutter: ^0.3.15+1  // 具体版本请查看官网

进入实际的代码操作

import 'dart:convert';import 'package:flutter/material.dart';import 'package:flutter/services.dart';import 'package:webview_flutter/webview_flutter.dart';class AgreementPage extends StatefulWidget { @override _AgreementPageState createState() => _AgreementPageState();}class _AgreementPageState extends State { WebViewController _webViewController; String filePath = 'assets/files/agreement.html'; @override Widget build(BuildContext context) {  return Scaffold(   appBar: AppBar(title: Text('享你来服务条款')),   body: WebView(    initialUrl: '',    javascriptMode: JavascriptMode.unrestricted,    onWebViewCreated: (WebViewController webViewController) {     _webViewController = webViewController;     _loadHtmlFromAssets();    },   )  ); }  _loadHtmlFromAssets() async {  String fileHtmlContents = await rootBundle.loadString(filePath);  _webViewController.loadUrl(Uri.dataFromString(fileHtmlContents,      mimeType: 'text/html', encoding: Encoding.getByName('utf-8'))    .toString()); }}