更新到 Android Studio Bumblebee 2021.1.1 后，Android 工作室中的 Gradle 项目同步出错
Error in Gradle project sync in Android studio after update to Android Studio Bumblebee 2021.1.1
将 Android Studio 更新到版本 2021.1.1 (Android Studio Bumblebee) 后，我在尝试同步 gradle 文件时遇到以下错误
ModelCache.safeGet(androidProjectResult.androidProject::getNdkVersion, "") must not be null
这是进一步的堆栈跟踪
om.intellij.openapi.externalSystem.model.ExternalSystemException: ModelCache.safeGet(androidProjectResult.androidProject::getNdkVersion, "") must not be null
at org.jetbrains.plugins.gradle.model.ProjectImportAction.addBuildModels(ProjectImportAction.java:346)
at org.jetbrains.plugins.gradle.model.ProjectImportAction.execute(ProjectImportAction.java:127)
at org.jetbrains.plugins.gradle.model.ProjectImportAction.execute(ProjectImportAction.java:42)
at org.gradle.tooling.internal.consumer.connection.InternalBuildActionAdapter.execute(InternalBuildActionAdapter.java:64)
at org.gradle.tooling.internal.provider.runner.ClientProvidedPhasedActionRunner$ActionRunningListener.runAction(ClientProvidedPhasedActionRunner.java:120)
at org.gradle.tooling.internal.provider.runner.ClientProvidedPhasedActionRunner$ActionRunningListener.run(ClientProvidedPhasedActionRunner.java:110)
at org.gradle.tooling.internal.provider.runner.ClientProvidedPhasedActionRunner$ActionRunningListener.buildFinished(ClientProvidedPhasedActionRunner.java:104)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.event.DefaultListenerManager$ListenerDetails.dispatch(DefaultListenerManager.java:398)
at org.gradle.internal.event.DefaultListenerManager$ListenerDetails.dispatch(DefaultListenerManager.java:380)
at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:61)
at org.gradle.internal.event.DefaultListenerManager$EventBroadcast$ListenerDispatch.dispatch(DefaultListenerManager.java:368)
at org.gradle.internal.event.DefaultListenerManager$EventBroadcast$ListenerDispatch.dispatch(DefaultListenerManager.java:355)
at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:43)
at org.gradle.internal.event.BroadcastDispatch$SingletonDispatch.dispatch(BroadcastDispatch.java:245)
at org.gradle.internal.event.BroadcastDispatch$SingletonDispatch.dispatch(BroadcastDispatch.java:157)
at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:61)
at org.gradle.internal.event.BroadcastDispatch$CompositeDispatch.dispatch(BroadcastDispatch.java:346)
at org.gradle.internal.event.BroadcastDispatch$CompositeDispatch.dispatch(BroadcastDispatch.java:249)
at org.gradle.internal.event.ListenerBroadcast.dispatch(ListenerBroadcast.java:141)
at org.gradle.internal.event.ListenerBroadcast.dispatch(ListenerBroadcast.java:37)
at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
at com.sun.proxy.$Proxy19.buildFinished(Unknown Source)
at org.gradle.initialization.DefaultGradleLauncher.finishBuild(DefaultGradleLauncher.java:195)
at org.gradle.initialization.DefaultGradleLauncher.finishBuild(DefaultGradleLauncher.java:133)
at org.gradle.internal.invocation.GradleBuildController.create(GradleBuildController.java:73)
at org.gradle.internal.invocation.GradleBuildController.create(GradleBuildController.java:67)
at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:178)
at org.gradle.internal.invocation.GradleBuildController.doBuild(GradleBuildController.java:67)
at org.gradle.internal.invocation.GradleBuildController.run(GradleBuildController.java:56)
at org.gradle.tooling.internal.provider.runner.ClientProvidedPhasedActionRunner.run(ClientProvidedPhasedActionRunner.java:60)
at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
at org.gradle.launcher.exec.BuildOutcomeReportingBuildActionRunner.run(BuildOutcomeReportingBuildActionRunner.java:63)
at org.gradle.tooling.internal.provider.ValidatingBuildActionRunner.run(ValidatingBuildActionRunner.java:32)
at org.gradle.tooling.internal.provider.FileSystemWatchingBuildActionRunner.run(FileSystemWatchingBuildActionRunner.java:67)
at org.gradle.launcher.exec.BuildCompletionNotifyingBuildActionRunner.run(BuildCompletionNotifyingBuildActionRunner.java:41)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner.call(RunAsBuildOperationBuildActionRunner.java:49)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner.call(RunAsBuildOperationBuildActionRunner.java:44)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:200)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:195)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:75)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:68)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:153)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:68)
at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:62)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.lambda$call(DefaultBuildOperationExecutor.java:76)
at org.gradle.internal.operations.UnmanagedBuildOperationWrapper.callWithUnmanagedSupport(UnmanagedBuildOperationWrapper.java:54)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:76)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner.run(RunAsBuildOperationBuildActionRunner.java:44)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.lambda$execute[=14=](InProcessBuildActionExecuter.java:54)
at org.gradle.composite.internal.DefaultRootBuildState.run(DefaultRootBuildState.java:87)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:53)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:29)
at org.gradle.launcher.exec.BuildTreeScopeLifecycleBuildActionExecuter.lambda$execute[=14=](BuildTreeScopeLifecycleBuildActionExecuter.java:33)
at org.gradle.internal.buildtree.BuildTreeState.run(BuildTreeState.java:49)
at org.gradle.launcher.exec.BuildTreeScopeLifecycleBuildActionExecuter.execute(BuildTreeScopeLifecycleBuildActionExecuter.java:32)
at org.gradle.launcher.exec.BuildTreeScopeLifecycleBuildActionExecuter.execute(BuildTreeScopeLifecycleBuildActionExecuter.java:27)
at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:104)
at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:55)
at org.gradle.tooling.internal.provider.SubscribableBuildActionExecuter.execute(SubscribableBuildActionExecuter.java:64)
at org.gradle.tooling.internal.provider.SubscribableBuildActionExecuter.execute(SubscribableBuildActionExecuter.java:37)
at org.gradle.tooling.internal.provider.SessionScopeLifecycleBuildActionExecuter.lambda$execute[=14=](SessionScopeLifecycleBuildActionExecuter.java:54)
at org.gradle.internal.session.BuildSessionState.run(BuildSessionState.java:67)
at org.gradle.tooling.internal.provider.SessionScopeLifecycleBuildActionExecuter.execute(SessionScopeLifecycleBuildActionExecuter.java:50)
at org.gradle.tooling.internal.provider.SessionScopeLifecycleBuildActionExecuter.execute(SessionScopeLifecycleBuildActionExecuter.java:36)
at org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:36)
at org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:25)
at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:59)
at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:31)
at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:55)
at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:41)
at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:47)
at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:31)
at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:65)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:39)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:29)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:35)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput.create(ForwardClientInput.java:78)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput.create(ForwardClientInput.java:75)
at org.gradle.util.Swapper.swap(Swapper.java:38)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:75)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.LogAndCheckHealth.execute(LogAndCheckHealth.java:55)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:63)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:84)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy.run(StartBuildOrRespondWithBusy.java:52)
at org.gradle.launcher.daemon.server.DaemonStateCoordinator.run(DaemonStateCoordinator.java:297)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
at org.gradle.internal.concurrent.ManagedExecutorImpl.run(ManagedExecutorImpl.java:48)
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
java.lang.NullPointerException: ModelCache.safeGet(androidProjectResult.androidProject::getNdkVersion, "") must not be null
知道如何解决/解决这个问题吗？
转到您的 SDK 管理器并按照此 instruction 下载 NDK。
按照此 找到您的 NDK 的位置。
并在您应用的 build.gradle 文件中指定它，就像这样-
android {
ndkPath "/Users/ndkPath/ndk21"
}
再次同步您的项目。并重建它。
在android.ndkPath
中添加ndk路径
或
添加ndkVersion '23.0.7599858'（如果你使用这种方法，那么在某些情况下，如果他们使用 ndk，你必须在其他库模块中添加版本）
尝试更新到 Android Gradle 插件 4.2.0+
并检查许可证，它适合我
yes | ${sdk}/cmdline-tools/latest/bin/sdkmanager --licenses
我遇到了这个错误，并通过进入我的项目 local.properties 并向其中添加以下行来修复它：
ndk.dir=C\:\Users\myusername\AppData\Local\Android\Sdk\ndk\23.1.7779620
无论你的 ndk 目录路径是什么，我都会尝试一下。
编辑：一段时间后，当我尝试同步时 gradle 我需要再次解决这个问题，我通过进入文件 -> 项目结构并在模块 -> 属性下选择最新的 ndk 版本来做到这一点.
编辑 2：使缓存失效并重新启动后，我需要再次修复此问题，但上述解决方案无效。最初我犹豫要不要将它添加到我的 build.gradle 中，因为其他人共享这个项目，但没有其他对我有用。这是：
android {
ndkPath "C:\Users\myusername\AppData\Local\Android\Sdk\ndk\23.1.7779620"
}
接下来我需要从我的 local.properties 文件中删除 ndk.dir 行。貌似一次只能用一个。
升级到 Android Studio Bumblebee 后出现的这个问题让我浪费了几个小时。这是我找到的最终解决方案。
打开 File/Project 结构菜单并从该屏幕的组合框中定义 NDK 版本，您就完成了：
检查以下示例屏幕截图：
不应再在您应用的 local.properties 文件中设置 ndk.dir 的值，并且在未来的版本中将删除对此 ndk.dir 设置的支持。 Android Gradle插件默认设置NDK版本，但如果需要特定版本的NDK，可以在build.gradle.
中设置android.ndkVersion
- 从 local.properties 中删除
ndk.dir=/path/to/ndk。
- 转到 android 部分下的
build.gradle 添加 ndkVersion='required ndk version'
例如：
android {
ndkVersion '23.1.7779620'
}
将 Android Studio 更新到版本 2021.1.1 (Android Studio Bumblebee) 后，我在尝试同步 gradle 文件时遇到以下错误
ModelCache.safeGet(androidProjectResult.androidProject::getNdkVersion, "") must not be null
这是进一步的堆栈跟踪
om.intellij.openapi.externalSystem.model.ExternalSystemException: ModelCache.safeGet(androidProjectResult.androidProject::getNdkVersion, "") must not be null
at org.jetbrains.plugins.gradle.model.ProjectImportAction.addBuildModels(ProjectImportAction.java:346)
at org.jetbrains.plugins.gradle.model.ProjectImportAction.execute(ProjectImportAction.java:127)
at org.jetbrains.plugins.gradle.model.ProjectImportAction.execute(ProjectImportAction.java:42)
at org.gradle.tooling.internal.consumer.connection.InternalBuildActionAdapter.execute(InternalBuildActionAdapter.java:64)
at org.gradle.tooling.internal.provider.runner.ClientProvidedPhasedActionRunner$ActionRunningListener.runAction(ClientProvidedPhasedActionRunner.java:120)
at org.gradle.tooling.internal.provider.runner.ClientProvidedPhasedActionRunner$ActionRunningListener.run(ClientProvidedPhasedActionRunner.java:110)
at org.gradle.tooling.internal.provider.runner.ClientProvidedPhasedActionRunner$ActionRunningListener.buildFinished(ClientProvidedPhasedActionRunner.java:104)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:36)
at org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.internal.event.DefaultListenerManager$ListenerDetails.dispatch(DefaultListenerManager.java:398)
at org.gradle.internal.event.DefaultListenerManager$ListenerDetails.dispatch(DefaultListenerManager.java:380)
at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:61)
at org.gradle.internal.event.DefaultListenerManager$EventBroadcast$ListenerDispatch.dispatch(DefaultListenerManager.java:368)
at org.gradle.internal.event.DefaultListenerManager$EventBroadcast$ListenerDispatch.dispatch(DefaultListenerManager.java:355)
at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:43)
at org.gradle.internal.event.BroadcastDispatch$SingletonDispatch.dispatch(BroadcastDispatch.java:245)
at org.gradle.internal.event.BroadcastDispatch$SingletonDispatch.dispatch(BroadcastDispatch.java:157)
at org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:61)
at org.gradle.internal.event.BroadcastDispatch$CompositeDispatch.dispatch(BroadcastDispatch.java:346)
at org.gradle.internal.event.BroadcastDispatch$CompositeDispatch.dispatch(BroadcastDispatch.java:249)
at org.gradle.internal.event.ListenerBroadcast.dispatch(ListenerBroadcast.java:141)
at org.gradle.internal.event.ListenerBroadcast.dispatch(ListenerBroadcast.java:37)
at org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:94)
at com.sun.proxy.$Proxy19.buildFinished(Unknown Source)
at org.gradle.initialization.DefaultGradleLauncher.finishBuild(DefaultGradleLauncher.java:195)
at org.gradle.initialization.DefaultGradleLauncher.finishBuild(DefaultGradleLauncher.java:133)
at org.gradle.internal.invocation.GradleBuildController.create(GradleBuildController.java:73)
at org.gradle.internal.invocation.GradleBuildController.create(GradleBuildController.java:67)
at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:178)
at org.gradle.internal.invocation.GradleBuildController.doBuild(GradleBuildController.java:67)
at org.gradle.internal.invocation.GradleBuildController.run(GradleBuildController.java:56)
at org.gradle.tooling.internal.provider.runner.ClientProvidedPhasedActionRunner.run(ClientProvidedPhasedActionRunner.java:60)
at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
at org.gradle.launcher.exec.BuildOutcomeReportingBuildActionRunner.run(BuildOutcomeReportingBuildActionRunner.java:63)
at org.gradle.tooling.internal.provider.ValidatingBuildActionRunner.run(ValidatingBuildActionRunner.java:32)
at org.gradle.tooling.internal.provider.FileSystemWatchingBuildActionRunner.run(FileSystemWatchingBuildActionRunner.java:67)
at org.gradle.launcher.exec.BuildCompletionNotifyingBuildActionRunner.run(BuildCompletionNotifyingBuildActionRunner.java:41)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner.call(RunAsBuildOperationBuildActionRunner.java:49)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner.call(RunAsBuildOperationBuildActionRunner.java:44)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:200)
at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:195)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:75)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:68)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:153)
at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:68)
at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:62)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.lambda$call(DefaultBuildOperationExecutor.java:76)
at org.gradle.internal.operations.UnmanagedBuildOperationWrapper.callWithUnmanagedSupport(UnmanagedBuildOperationWrapper.java:54)
at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:76)
at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner.run(RunAsBuildOperationBuildActionRunner.java:44)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.lambda$execute[=14=](InProcessBuildActionExecuter.java:54)
at org.gradle.composite.internal.DefaultRootBuildState.run(DefaultRootBuildState.java:87)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:53)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:29)
at org.gradle.launcher.exec.BuildTreeScopeLifecycleBuildActionExecuter.lambda$execute[=14=](BuildTreeScopeLifecycleBuildActionExecuter.java:33)
at org.gradle.internal.buildtree.BuildTreeState.run(BuildTreeState.java:49)
at org.gradle.launcher.exec.BuildTreeScopeLifecycleBuildActionExecuter.execute(BuildTreeScopeLifecycleBuildActionExecuter.java:32)
at org.gradle.launcher.exec.BuildTreeScopeLifecycleBuildActionExecuter.execute(BuildTreeScopeLifecycleBuildActionExecuter.java:27)
at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:104)
at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:55)
at org.gradle.tooling.internal.provider.SubscribableBuildActionExecuter.execute(SubscribableBuildActionExecuter.java:64)
at org.gradle.tooling.internal.provider.SubscribableBuildActionExecuter.execute(SubscribableBuildActionExecuter.java:37)
at org.gradle.tooling.internal.provider.SessionScopeLifecycleBuildActionExecuter.lambda$execute[=14=](SessionScopeLifecycleBuildActionExecuter.java:54)
at org.gradle.internal.session.BuildSessionState.run(BuildSessionState.java:67)
at org.gradle.tooling.internal.provider.SessionScopeLifecycleBuildActionExecuter.execute(SessionScopeLifecycleBuildActionExecuter.java:50)
at org.gradle.tooling.internal.provider.SessionScopeLifecycleBuildActionExecuter.execute(SessionScopeLifecycleBuildActionExecuter.java:36)
at org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:36)
at org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:25)
at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:59)
at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:31)
at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:55)
at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:41)
at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:47)
at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:31)
at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:65)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:39)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:29)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:35)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput.create(ForwardClientInput.java:78)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput.create(ForwardClientInput.java:75)
at org.gradle.util.Swapper.swap(Swapper.java:38)
at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:75)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.LogAndCheckHealth.execute(LogAndCheckHealth.java:55)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:63)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:84)
at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:37)
at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy.run(StartBuildOrRespondWithBusy.java:52)
at org.gradle.launcher.daemon.server.DaemonStateCoordinator.run(DaemonStateCoordinator.java:297)
at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
at org.gradle.internal.concurrent.ManagedExecutorImpl.run(ManagedExecutorImpl.java:48)
at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
java.lang.NullPointerException: ModelCache.safeGet(androidProjectResult.androidProject::getNdkVersion, "") must not be null
知道如何解决/解决这个问题吗？
转到您的 SDK 管理器并按照此 instruction 下载 NDK。
按照此
并在您应用的 build.gradle 文件中指定它，就像这样-
android {
ndkPath "/Users/ndkPath/ndk21"
}
再次同步您的项目。并重建它。
在android.ndkPath
或
添加ndkVersion '23.0.7599858'（如果你使用这种方法，那么在某些情况下，如果他们使用 ndk，你必须在其他库模块中添加版本）
尝试更新到 Android Gradle 插件 4.2.0+
并检查许可证，它适合我
yes | ${sdk}/cmdline-tools/latest/bin/sdkmanager --licenses
我遇到了这个错误，并通过进入我的项目 local.properties 并向其中添加以下行来修复它：
ndk.dir=C\:\Users\myusername\AppData\Local\Android\Sdk\ndk\23.1.7779620
无论你的 ndk 目录路径是什么，我都会尝试一下。
编辑：一段时间后，当我尝试同步时 gradle 我需要再次解决这个问题，我通过进入文件 -> 项目结构并在模块 -> 属性下选择最新的 ndk 版本来做到这一点.
编辑 2：使缓存失效并重新启动后，我需要再次修复此问题，但上述解决方案无效。最初我犹豫要不要将它添加到我的 build.gradle 中，因为其他人共享这个项目，但没有其他对我有用。这是：
android {
ndkPath "C:\Users\myusername\AppData\Local\Android\Sdk\ndk\23.1.7779620"
}
接下来我需要从我的 local.properties 文件中删除 ndk.dir 行。貌似一次只能用一个。
升级到 Android Studio Bumblebee 后出现的这个问题让我浪费了几个小时。这是我找到的最终解决方案。
打开 File/Project 结构菜单并从该屏幕的组合框中定义 NDK 版本，您就完成了：
检查以下示例屏幕截图：
不应再在您应用的 local.properties 文件中设置 ndk.dir 的值，并且在未来的版本中将删除对此 ndk.dir 设置的支持。 Android Gradle插件默认设置NDK版本，但如果需要特定版本的NDK，可以在build.gradle.
中设置android.ndkVersion- 从 local.properties 中删除
ndk.dir=/path/to/ndk。 - 转到 android 部分下的
build.gradle添加ndkVersion='required ndk version'
例如：
android {
ndkVersion '23.1.7779620'
}