webview_flutter 加载本地html和js文件

flutter version: 2.10.1dart version: 2.16.1webview_flutter version: ^3.0.0网上看到别人使用的js都是直接写在index.html<!DOCTYPE html><html lang="en"><head><meta charset="UTF-8"><title>Tit

hswizy

4081人浏览 · 2022-02-15 13:53:25

hswizy · 2022-02-15 13:53:25 发布

flutter version: 2.10.1
dart version: 2.16.1
webview_flutter version: ^3.0.0

网上看到别人使用的js都是直接写在

index.html

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
    <script type="text/javascript" src="script.js"></script>
</head>
<body>
<h1>BBBBBBBBBBBB</h1>

<button onclick="setname('hsw')">设置名称</button>
</body>
</html>

script.js

function setname(name) {
    console.log("my name is " + name);
}

在yaml文件中写入assets配置

可以现在项目根目录下面创建一个文件夹 assets

flutter:
  assets:
    - assets/html/

注意前面的空格!!!

使用web_flutter 加载html

import 'package:flutter/material.dart';
import 'package:webview_flutter/webview_flutter.dart';
import 'package:flutter/services.dart' show rootBundle;

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

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  // 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: const MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

class MyHomePage extends StatefulWidget {
  const MyHomePage({Key? key, required this.title}) : super(key: key);
  final String title;

  @override
  State<MyHomePage> createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
  late WebViewController _webViewController;
  String filePath = 'assets/html/index.html';
  String jsPath = 'assets/html/script.js';

  @override
  Widget build(BuildContext context) {

    return Scaffold(
      appBar: AppBar(
        title: Text(widget.title),
      ),
      body: WebView(
        initialUrl: '',
        javascriptMode: JavascriptMode.unrestricted,
        onWebViewCreated: (WebViewController webViewController) {
          _webViewController = webViewController;
          _loadHtmlFromAssets();
        },
        onPageFinished: (url) async {
        //加载js文件
          String jsContent = await rootBundle.loadString(jsPath);
          _webViewController.runJavascript(jsContent);
         //加载js脚本 _webViewController.runJavascriptReturningResult("setname('hsw')").then((value) => {
            print(value)
          });
        },
      ),
    );
  }

  _loadHtmlFromAssets() async {
    String fileHtmlContent = await rootBundle.loadString(filePath);
    _webViewController.loadHtmlString(fileHtmlContent);
    String jsContent = await rootBundle.loadString(jsPath);
    _webViewController.runJavascript(jsContent);
  }
}