第021例-richtext与代码着色-(学习Flutter第8天)

演示

图片演示:

网页演示:链接

参考文章

• RichText 写个代码高亮组件 链接

使用到的类

类	说明	详细介绍
RichText
TextSpan
DartSyntaxHighlighter

1. 创建项目

flutter create example021_richtext

2. AS打开

3. 添加依赖、放入资源文件

pubspec.yaml

  syntax_highlighter: ^0.1.1

4. 编写代码

main.dart

import 'package:flutter/material.dart';
import 'package:syntax_highlighter/syntax_highlighter.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: 'Syntax Highlighter Example',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: MyHomePage(title: 'Syntax Highlighter Example'),
    );
  }
}

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

  @override
  _MyHomePageState createState() => _MyHomePageState();
}

class _MyHomePageState extends State<MyHomePage> {
    
    
  String _exampleCode =
      "class MyHomePage extends StatefulWidget { MyHomePage({Key key, this.title}) : super(key: key); final String title; @override _MyHomePageState createState() => _MyHomePageState();}";

  @override
  Widget build(BuildContext context) {
    
    
    final SyntaxHighlighterStyle style =
    Theme.of(context).brightness == Brightness.dark
        ? SyntaxHighlighterStyle.darkThemeStyle()
        : SyntaxHighlighterStyle.lightThemeStyle();
    return Scaffold(
        appBar: AppBar(
          title: Text(widget.title),
        ),
        body: SingleChildScrollView(
          child: Padding(
            padding: const EdgeInsets.all(16.0),
            child: RichText(
              text: TextSpan(
                style: const TextStyle(fontFamily: 'monospace', fontSize: 10.0),
                children: <TextSpan>[
                  DartSyntaxHighlighter(style).format(_exampleCode),
                ],
              ),
            ),
          ),
        ));
  }
}

5. 调试运行

AS中先打开Android或者iOS模拟器，点运行按钮。
或在命令行中运行:

flutter run

6. 打包web

flutter build web

7.源码

https://gitee.com/ruik2080/example-flutter

8. 其它参考