直接进入主题，大概步骤如下

• 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<AgreementPage> {
  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());
  }
}

链接: https://fly63.com/article/detial/6583