颤振：无法运行基本的 hello world 程序，因为“任务执行失败：app:packageDebug”。 '

Question

我是 Flutter 和 android studio 的初学者，当我尝试运行一个非常基本的 hello world 程序时，我得到了这个：

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:packageDebug'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
   > java.io.FileNotFoundException: D:\flutter\newapp\build\app\intermediates\signing_config\debug\out\signing-config.json (Access is denied)

* 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 16s
[!] Gradle threw an error while downloading artifacts from the network. Retrying to download...
Running Gradle task 'assembleDebug'...

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:packageDebug'.
> A failure occurred while executing com.android.build.gradle.internal.tasks.Workers$ActionFacade
   > java.io.FileNotFoundException: D:\flutter\newapp\build\app\intermediates\signing_config\debug\out\signing-config.json (Access is denied)

* 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
[!] Gradle threw an error while downloading artifacts from the network. Retrying to download...
Exception: Gradle task assembleDebug failed with exit code 1

我试过flutter clean，但没用。我通过 android studio 手动清除缓存也不起作用。我终于重新启动了我的机器，但也没有用。

我没有运气和解决方案。任何帮助将不胜感激。

（运行 Windows 10）

Answer 1

转到路由D:\flutter\newapp\build\app\intermediates\signing_config\debug\out\，删除文件signing-config.json，然后再次运行。

Answer 2

我建议重新下载 Flutter SDK，并使用 Microsoft VSC 而不是 Android Studio。它的轻量级和剂量会给你的 PC 带来很大的压力。

Answer 3

我遇到了同样的错误，命令 flutter clean 起作用了。