Flutter: helvetica has no unicode support


When working with Flutter (a popular framework for building cross-platform mobile applications), you may encounter issues related to font support and unicode characters. In the case of Helvetica font, it does not inherently support all unicode characters.

For example, if you are trying to render unicode characters that are not covered by the Helvetica font, you might experience some unexpected behavior or the characters might not display at all.

To address this issue, you have a few options:

  1. Choose a different font: If you specifically need support for unicode characters, you can select a font from the available fonts in Flutter that supports those characters. There are various font packages available in Flutter to choose from, such as Google Fonts package.
  2. Add glyph support: If you really want to use Helvetica font and the missing characters are important, you can add glyph support to the font. This involves editing the font file itself and adding the necessary glyph shapes for the desired unicode characters. However, this process can be complex and time-consuming.

Here’s an example of using a different font in Flutter:

import 'package:flutter/material.dart';

void main() {

class MyApp extends StatelessWidget {
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Unicode Support Example',
      theme: ThemeData(fontFamily: 'NotoSansCJK'),
      home: Scaffold(
        appBar: AppBar(
          title: Text('Unicode Support'),
        body: Center(
          child: Text(
            'Some unicode characters: 学习',
            style: TextStyle(fontSize: 24),

In the above example, we have set the font family to ‘NotoSansCJK’ using the ThemeData. This font family supports unicode characters, and you can replace it with any other font family that suits your requirements.

By using a font that supports the desired unicode characters, you should be able to render them correctly in your Flutter application.

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