Flutter编译异常：Android模块无法构建APK，提示class-modifiers特性禁用

安全阿岳

2026-7-6

Flutter Android模块构建APK失败：class-modifiers特性禁用问题

问题描述

通过Flutter框架运行代码时应用可正常启动，但单独打开Android模块构建APK时失败，报错信息如下：

/Applications/flutter/packages/flutter/lib/src/material/chip.dart:66:10: Error: The 'class-modifiers' language feature is disabled for this library.
Try removing the package language version or setting the language version to 3.0 or higher.
abstract interface class ChipAttributes {
^^^^^^^^^
/Applications/flutter/packages/flutter/lib/src/material/chip.dart:221:10: Error: The 'class-modifiers' language feature is disabled for this library.
Try removing the package language version or setting the language version to 3.0 or higher.
abstract interface class DeletableChipAttributes {

解决方案

升级Flutter SDK：abstract interface class是Dart 3.0新增特性，需确保Flutter SDK版本支持Dart 3.0及以上。执行以下命令检查并升级：
```
flutter --version
flutter upgrade
```
调整Dart语言版本配置：在项目根目录的pubspec.yaml中，确认environment的SDK版本不低于3.0.0，示例配置：
```
environment:
  sdk: '>=3.0.0 <4.0.0'
```
清理构建缓存：清除旧的构建缓存，避免版本冲突：
```
flutter clean
cd android && ./gradlew clean
```
重新构建APK：在Android Studio中打开Android模块，执行Build > Build Bundle(s)/APK(s) > Build APK(s)，或终端执行：
```
cd android && ./gradlew assembleRelease
```