首次运行Flutter应用遇构建失败：无法删除目录异常

严格按照官方教程运行第一个Flutter应用，选择android-x64模拟器作为目标设备，运行示例应用时出现以下Gradle构建错误：

Launching lib\main.dart on sdk gphone64 x86 64 in debug mode...
FAILURE: Build failed with an exception.

What went wrong:
Execution failed for task ':app:checkDebugAarMetadata'.
> Unable to delete directory
  C:\flutterdev\mydev\flutter_application_1\build\app\intermediates\aar_metadata_check\debug\checkDebugAarMetadata'

Try:
   Run with --stacktrace option to get the stack trace.
   Run with --info or --debug option to get more log output.
   Run with --scan to get full insights.
   Get more help at https://help.gradle.org.

BUILD FAILED in 2s
Error: Gradle task assembleDebug failed with exit code 1

已执行flutter doctor，检测结果无异常：

c:\flutterdev\mydev>flutter doctor
   Doctor summary (to see all details, run flutter doctor -v):
  [√] Flutter (Channel stable, 3.29.2, on Microsoft Windows [Version 
   10.0.19045.5608], locale en-US)
  [√] Windows Version (10 Pro 64-bit, 22H2, 2009)
  [√] Android toolchain - develop for Android devices (Android SDK 
  version 35.0.1)
  [√] Chrome - develop for the web
  [√] Visual Studio - develop Windows apps (Visual Studio Community 2022 17.13.6)
  [√] Android Studio (version 2024.3)
  [√] VS Code (version 1.99.0)
  [√] Connected device (4 available)
  [√] Network resources

  • No issues found!

解决方案 #

• 关闭所有可能占用目标目录的程序（如Android Studio、VS Code、打开该目录的文件资源管理器），重新执行flutter run
• 手动删除项目根目录下的build文件夹，再运行flutter run
• 执行flutter clean命令清理构建缓存，之后重新构建应用
• 检查目录权限：确认当前用户对C:\flutterdev\mydev\flutter_application_1\build文件夹拥有读写权限，可通过右键文件夹→属性→安全选项卡查看并调整
• 若以上方法无效，重启电脑后再尝试构建应用

内容的提问来源于stack exchange，提问作者sunny