Flutter错误：构建失败，出现异常

问题描述

首先，当我安装并运行Android Studio时，该应用程序完美运行，然后在两天后由于某种原因发生了这种情况。请帮我解决这个问题。谢谢

 Launching lib\main.dart on GM1910 in debug mode...
    Running Gradle task 'assembleDebug'...
    Not resetting hidden file - C:\Users\zahin\AndroidStudioProjects\project1\build\app\intermediates\flutter\debug\flutter_assets\assets\ss\Thumbs.db

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:signingConfigWriterDebug'.
> java.nio.file.AccessDeniedException: C:\Users\zahin\AndroidStudioProjects\project1\build\app\intermediates\signing_config\debug\out\signing-config.json

* 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 4s
Exception: Gradle task assembleDebug failed with exit code 1

解决方法

使用flutter clean或删除项目根目录下的build文件夹，然后重试。