Android 字体下的意外关键资产（（字符串））-移动应用程序在颤振和飞镖中出错

我是移动开发的新手，我正在使用Dart和Flatter构建移动应用程序，包括android和ios应用程序。问题是我无法启动我的应用程序，并且我不断收到与

pubspec.yaml

文件相关的错误

当我评论

字体：

部分时，应用程序运行正常。但是我需要加载字体，所以这并不能解决我的问题

这是我的

publispec.yaml

name:simple\u应用程序
描述：一个新的颤振项目。
版本：1.0.0+1
环境：
sdk:“>=2.1.0请参阅我的工作示例

  fonts:
    - family: icomoon
      fonts:
        - asset: assets/fonts/IcoMoon.ttf

    - family: Qwigley
      fonts:
        - asset: assets/fonts/Qwigley-Regular.ttf

    - family: Dosis
      fonts:
        - asset: assets/fonts/dosis/Dosis-Regular.otf
          weight: 400
        - asset: assets/fonts/dosis/Dosis-Medium.otf
          weight: 500
        - asset: assets/fonts/dosis/Dosis-SemiBold.otf
          weight: 600
        - asset: assets/fonts/dosis/Dosis-Bold.otf
          weight: 800
        - asset: assets/fonts/dosis/Dosis-ExtraBold.otf
          weight: 900

字体：
-家庭：罂粟
字体：
-资产：资产/font/Poppins-Black.ttf

检查资产和资产之间是否存在差异。请检查并更新它。
尝试此
pubspec.yaml
：

name: custom_fonts
description: An example of how to use custom fonts with Flutter

dependencies:
  flutter:
    sdk: flutter

dev_dependencies:
  flutter_test:
    sdk: flutter

flutter:
  fonts:
    - family: DUBAI
      fonts:
        - asset: assets/fonts/DUBAI-BOLD.TTF
        - asset: assets/fonts/DUBAI-LIGHT.TTF
        - asset: assets/fonts/DUBAI-MEDIUM.TTF
        - asset: assets/fonts/DUBAI-REGULAR.TTF
    - family: Dima
      fonts:
        - asset: assets/fonts/DimaPlatinum.ttf

  uses-material-design: true

  assets:
    - assets/azmoon.db
    - assets/qi1.png

也许你想看看
main.dart
：

import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Custom Fonts',
      // Set Raleway as the default app font.
      theme: ThemeData(fontFamily: 'Raleway'),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      // The AppBar uses the app-default Raleway font.
      appBar: AppBar(title: Text('Custom Fonts')),
      body: Center(
        // This Text widget uses the RobotoMono font.
        child: Text(
          'Roboto Mono sample',
          style: TextStyle(fontFamily: 'RobotoMono'),
        ),
      ),
    );
  }
}

请参见上的完整教程

如果您遇到“错误：无法在pubspec.yaml中找到资产条目”问题，请参阅。
：）
资产，而不是资产。请检查omg非常感谢@AlekseyPotapov，这也是我的问题，它让我发疯，试图找出我做错了什么
import 'package:flutter/material.dart';

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

class MyApp extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Custom Fonts',
      // Set Raleway as the default app font.
      theme: ThemeData(fontFamily: 'Raleway'),
      home: MyHomePage(),
    );
  }
}

class MyHomePage extends StatelessWidget {
  @override
  Widget build(BuildContext context) {
    return Scaffold(
      // The AppBar uses the app-default Raleway font.
      appBar: AppBar(title: Text('Custom Fonts')),
      body: Center(
        // This Text widget uses the RobotoMono font.
        child: Text(
          'Roboto Mono sample',
          style: TextStyle(fontFamily: 'RobotoMono'),
        ),
      ),
    );
  }
}