Android Studio执行gradlew构建时遇IO异常及测试任务失败求助

错误日志 #

Could not write standard input to Gradle Test Executor 1.
java.io.IOException: The pipe is being closed
        at java.base/java.io.FileOutputStream.writeBytes(Native Method)
        at java.base/java.io.FileOutputStream.write(FileOutputStream.java:349)
        at java.base/java.io.BufferedOutputStream.flushBuffer(BufferedOutputStream.java:81)
        at java.base/java.io.BufferedOutputStream.flush(BufferedOutputStream.java:142)
        at org.gradle.process.internal.streams.ExecOutputHandleRunner.writeBuffer(ExecOutputHandleRunner.java:98)
        at org.gradle.process.internal.streams.ExecOutputHandleRunner.forwardContent(ExecOutputHandleRunner.java:85)
        at org.gradle.process.internal.streams.ExecOutputHandleRunner.run(ExecOutputHandleRunner.java:64)
        at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
        at org.gradle.internal.concurrent.AbstractManagedExecutor$1.run(AbstractManagedExecutor.java:47)
        at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1136)
        at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:635)
        at java.base/java.lang.Thread.run(Thread.java:840)

> Task :app:testDebugUnitTest FAILED
Error: Could not find or load main class Files\nodejs;.;C:\MyProjects\rtr05-083\MyAndroid\01-IDE\app\src\testDebug\jniLibs;C:\MyProjects\rtr05-083\MyAndroid\01-IDE\app\src\test\jniLibs
Caused by: java.lang.ClassNotFoundException: Files\nodejs;/;C:\MyProjects\rtr05-083\MyAndroid\01-IDE\app\src\testDebug\jniLibs;C:\MyProjects\rtr05-083\MyAndroid\01-IDE\app\src\test\jniLibs

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:testDebugUnitTest'.
> Process 'Gradle Test Executor 1' finished with non-zero exit value 1

* 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 38s
78 actionable tasks: 78 executed

问题分析 #

错误核心是系统CLASSPATH环境变量包含未加引号的带空格路径，比如C:\Program Files\nodejs，Gradle解析时会把空格后的Files\nodejs误识别为主类名，导致ClassNotFoundException。

解决方案 #

• 修复系统CLASSPATH环境变量

  1. 打开系统环境变量设置：右键「此电脑」→「属性」→「高级系统设置」→「环境变量」
  2. 在「系统变量」中找到CLASSPATH，检查其值里的路径
  3. 给所有带空格的路径添加双引号，例如将C:\Program Files\nodejs修改为"C:\Program Files\nodejs"
  4. 保存设置后，重启Android Studio和终端，重新执行构建

• 临时跳过系统CLASSPATH（无需修改环境变量）
  在终端执行构建命令前，临时清空CLASSPATH：

  set CLASSPATH= && gradlew clean testDebugUnitTest
  

  或PowerShell：

  $env:CLASSPATH = ""; ./gradlew clean testDebugUnitTest
  

• 额外排查步骤

  • 检查项目build.gradle中test相关配置，确认jniLibs路径未被错误设置
  • 清理Gradle缓存并重新同步：执行gradlew clean build --refresh-dependencies

内容的提问来源于stack exchange，提问作者Guava