flutter - RichText 未按预期设置文本样式

Question

刚刚创建了一个项目:

> flutter create simple

并添加了一个 RichText 小部件，但结果不是我所期望的:默认样式的文本，只有粗体字粗体。在我的安卓设备上，我得到了:

完整的 main.dart:

import 'package:flutter/material.dart';

void main() => runApp(new MyApp());

class MyApp extends StatelessWidget {
  // This widget is the root of your application.
  @override
  Widget build(BuildContext context) {
    return new MaterialApp(
      title: 'Flutter Demo',
      theme: new ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: new MyHomePage(title: 'Flutter Demo Home Page'),
    );
  }
}

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

  final String title;

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

class _MyHomePageState extends State<MyHomePage> {
  int _counter = 0;

  void _incrementCounter() {
    setState(() {
      _counter++;
    });
  }

  @override
  Widget build(BuildContext context) {
    return new Scaffold(
      appBar: new AppBar(
        title: new Text(widget.title),
      ),
      body: new Center(
        child: new Column(
          mainAxisAlignment: MainAxisAlignment.center,
          children: <Widget>[
            new RichText(
              text: new TextSpan(
                text: 'Hello ',
                style: DefaultTextStyle.of(context).style,
                children: <TextSpan>[
                  new TextSpan(
                      text: 'bold',
                      style: new TextStyle(fontWeight: FontWeight.bold)),
                  new TextSpan(text: ' world!'),
                ],
              ),
            ),
            new Text(
              'You have pushed the button this many times:',
            ),
            new Text(
              '$_counter',
              style: Theme.of(context).textTheme.display1,
            ),
          ],
        ),
      ),
      floatingActionButton: new FloatingActionButton(
        onPressed: _incrementCounter,
        tooltip: 'Increment',
        child: new Icon(Icons.add),
      ), 
    );
  }
}

我错过了什么？这个“红色”主题是从哪里来的？

Answer 1

您现在可以做的事情要简单得多。

如果你想用默认的TextStyle创建一个RichText，只需使用Text.rich:

Text.rich(
  TextSpan(
    children: [
      TextSpan(text: 'Hello '),
      TextSpan(
        text: 'bold',
        style: TextStyle(fontWeight: FontWeight.bold),
      ),
      TextSpan(text: ' world!'),
    ],
  ),
)