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我想要获得简单的Android单元测试，以在Gitlab CI上运行，但我遇到了问题，无法正确构建CI Docker镜像。我有master项目，该项目从Library项目中抽取。库中有C代码，所以我需要使用CMake来构建它。所有这些都是在使用Android Studio时在我的Windows机器上进行的本地工作。但是，一旦我移动到CI服务器，事情出现以下错误打破：Android Gradle - Gitlab CI - Docker - CMake - 空指针异常
Using incremental javac compilation for :Library debug.
Incremental java compilation is an incubating feature.
Checking the license for package CMake 3.6.3155560 in /android-sdk-linux/licenses
License for package CMake 3.6.3155560 accepted.
Preparing "Install CMake 3.6.3155560 (revision: 3.6.3155560)".
"Install CMake 3.6.3155560 (revision: 3.6.3155560)" ready.
Finishing "Install CMake 3.6.3155560 (revision: 3.6.3155560)"
Installing CMake 3.6.3155560 in /android-sdk-linux/cmake/3.6.3155560
"Install CMake 3.6.3155560 (revision: 3.6.3155560)" complete.
"Install CMake 3.6.3155560 (revision: 3.6.3155560)" finished.
FAILURE: Build failed with an exception.
* What went wrong:
A problem occurred configuring project ':Library'.
> java.lang.NullPointerException (no error message)
* Try:
Run with --debug option to get more log output.
* Exception is:
org.gradle.api.ProjectConfigurationException: A problem occurred configuring project ':Library'.
at org.gradle.configuration.project.LifecycleProjectEvaluator.addConfigurationFailure(LifecycleProjectEvaluator.java:94)
at org.gradle.configuration.project.LifecycleProjectEvaluator.notifyAfterEvaluate(LifecycleProjectEvaluator.java:89)
...
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54)
at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40)
Caused by: java.lang.NullPointerException
at com.android.builder.sdk.DefaultSdkLoader.installSdkTool(DefaultSdkLoader.java:572)
at com.android.build.gradle.internal.SdkHandler.installCMake(SdkHandler.java:302)
at com.android.build.gradle.tasks.ExternalNativeJsonGenerator.create(ExternalNativeJsonGenerator.java:628)
at com.android.build.gradle.internal.TaskManager.createExternalNativeBuildJsonGenerators(TaskManager.java:1241)
at com.android.build.gradle.internal.LibraryTaskManager.lambda$createTasksForVariantData$11(LibraryTaskManager.java:240)
...
at com.sun.proxy.$Proxy15.afterEvaluate(Unknown Source)
at org.gradle.configuration.project.LifecycleProjectEvaluator.notifyAfterEvaluate(LifecycleProjectEvaluator.java:82)
... 56 more
BUILD FAILED
Total time: 1 mins 25.384 secs
Stopped 0 worker daemon(s).
Received result Failure[value=org.gradle.initialization.ReportedException: org.gradle.internal.exceptions.LocationAwareException: A problem occurred configuring project ':Library'.] from daemon DaemonInfo{pid=39, address=[1f3b75f9-7080-48b5-b298-0e6136640a0a port:41964, addresses:[/127.0.0.1]], state=Busy, lastBusy=1496784783851, context=DefaultDaemonContext[uid=0e3eadf0-a7bd-4ede-9eb8-0c2a96ebef58,javaHome=/usr/lib/jvm/java-8-openjdk-amd64,daemonRegistryDir=/root/.gradle/daemon,pid=39,idleTimeout=10800000,daemonOpts=-Xmx1536m,-Dfile.encoding=UTF-8,-Duser.country,-Duser.language=en, -Duser.variant]} (build should be done).
ERROR: Job failed: exit code 1
由线
Caused by: java.lang.NullPointerException
at com.android.builder.sdk.DefaultSdkLoader.installSdkTool(DefaultSdkLoader.java:572)
at com.android.build.gradle.internal.SdkHandler.installCMake(SdkHandler.java:302)
它看起来与CMake的问题来看。但是看起来它已经安装并且许可证被接受，正如上面该块的开始处的输出所指出的那样。
任何人都可以给我一些指示什么是问题？
* Gradle是否不知道CMake的安装位置？ *这可能是NDK的问题吗？ *或者可能在哪里可以找到com.android.build.gradle.internal.SdkHandler.installCMake和com.android.builder.sdk.DefaultSdkLoader.installSdkTool的源代码。
我的搜索一直没有成果。
我可以根据要求提供更多关于我的设置。 （即Android项目，码头工人的形象，gitlab-ci.yml等）