当我尝试同步我的项目时，gradle同步失败，并出现以下错误。
仅当我尝试通过build.gradle文件中的externalNativeBuild将一些本机C ++代码添加到项目中时，才会发生错误。 CMakeLists.txt非常简单，我从cpp文件中剥离了所有复杂的代码。我很沮丧，有人有任何想法吗？我已经附上了相关代码。
build.gradle：
# If I remove this section, everything syncs up just fine.
externalNativeBuild {
cmake {
path file('./CMakeLists.txt')
}
}
CMakeLists.txt
cmake_minimum_required(VERSION 3.10.2)
add_library( # Specifies the name of the library.
native-lib
# Sets the library as a shared library.
SHARED
# Provides a relative path to your source file(s).
src/main/cpp/BAM.cpp )
BAM.cpp
#include "BAM.h"
int test()
{
return 0;
}
BAM.h
#ifndef BAM_H
#define BAM_H
int test();
#endif
堆栈跟踪：
Format specifier '%20A'
format = - expected json C:\pathtoproject\app\.externalNativeBuild\cmake\proDebug\x86\android_gradle_build.json file is not present, will remove stale json folder
args[0] =
stacktrace = java.util.Formatter.format(Formatter.java:2519)
java.util.Formatter.format(Formatter.java:2455)
java.lang.String.format(String.java:2940)
com.android.build.gradle.internal.cxx.configure.LoggingEnvironmentKt.checkedFormat(LoggingEnvironment.kt:87)
com.android.build.gradle.internal.cxx.configure.LoggingEnvironmentKt.info(LoggingEnvironment.kt:76)
com.android.build.gradle.tasks.ExternalNativeJsonGenerator.buildForOneConfiguration(ExternalNativeJsonGenerator.java:285)
com.android.build.gradle.tasks.ExternalNativeJsonGenerator.buildForOneConfigurationConvertExceptions(ExternalNativeJsonGenerator.java:187)
com.android.build.gradle.tasks.ExternalNativeJsonGenerator.buildForOneAbiName(ExternalNativeJsonGenerator.java:240)
com.android.build.gradle.internal.ide.NativeModelBuilder.buildNativeVariantAbi(NativeModelBuilder.kt:149)
com.android.build.gradle.internal.ide.NativeModelBuilder.buildAll(NativeModelBuilder.kt:97)
com.android.build.gradle.internal.ide.NativeModelBuilder.buildAll(NativeModelBuilder.kt:38)
org.gradle.tooling.provider.model.internal.DefaultToolingModelBuilderRegistry$ParameterizedBuildOperationWrappingToolingModelBuilder$1$1.create(DefaultToolingModelBuilderRegistry.java:138)
org.gradle.api.internal.project.DefaultProjectStateRegistry.withLenientState(DefaultProjectStateRegistry.java:132)
org.gradle.tooling.provider.model.internal.DefaultToolingModelBuilderRegistry$ParameterizedBuildOperationWrappingToolingModelBuilder$1.call(DefaultToolingModelBuilderRegistry.java:134)
org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:315)
org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:305)
org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:175)
org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:101)
org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
org.gradle.tooling.provider.model.internal.DefaultToolingModelBuilderRegistry$ParameterizedBuildOperationWrappingToolingModelBuilder.buildAll(DefaultToolingModelBuilderRegistry.java:131)
org.gradle.tooling.internal.provider.runner.DefaultBuildController.getParameterizedModel(DefaultBuildController.java:99)
org.gradle.tooling.internal.provider.runner.DefaultBuildController.getModel(DefaultBuildController.java:81)
org.gradle.tooling.internal.consumer.connection.InternalBuildActionAdapter$2.getModel(InternalBuildActionAdapter.java:77)
org.gradle.tooling.internal.consumer.connection.BuildControllerAdapter.getModel(BuildControllerAdapter.java:62)
org.gradle.tooling.internal.consumer.connection.AbstractBuildController.findModel(AbstractBuildController.java:57)
com.android.tools.idea.gradle.project.sync.ng.SelectedVariantChooser.syncAndAddNativeVariantAbi(SelectedVariantChooser.java:181)
com.android.tools.idea.gradle.project.sync.ng.SelectedVariantChooser.chooseSelectedVariants(SelectedVariantChooser.java:81)
com.android.tools.idea.gradle.project.sync.ng.SyncProjectModels.populate(SyncProjectModels.java:95)
com.android.tools.idea.gradle.project.sync.ng.SyncAction.execute(SyncAction.java:59)
com.android.tools.idea.gradle.project.sync.ng.SyncAction.execute(SyncAction.java:33)
org.gradle.tooling.internal.consumer.connection.InternalBuildActionAdapter.execute(InternalBuildActionAdapter.java:80)
org.gradle.tooling.internal.provider.runner.ClientProvidedPhasedActionRunner$ActionRunningListener.runAction(ClientProvidedPhasedActionRunner.java:120)
org.gradle.tooling.internal.provider.runner.ClientProvidedPhasedActionRunner$ActionRunningListener.run(ClientProvidedPhasedActionRunner.java:110)
org.gradle.tooling.internal.provider.runner.ClientProvidedPhasedActionRunner$ActionRunningListener.projectsEvaluated(ClientProvidedPhasedActionRunner.java:98)
sun.reflect.GeneratedMethodAccessor101.invoke(Unknown Source)
sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
java.lang.reflect.Method.invoke(Method.java:498)
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
org.gradle.internal.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
org.gradle.internal.event.DefaultListenerManager$ListenerDetails.dispatch(DefaultListenerManager.java:376)
org.gradle.internal.event.DefaultListenerManager$ListenerDetails.dispatch(DefaultListenerManager.java:358)
org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:58)
org.gradle.internal.event.DefaultListenerManager$EventBroadcast$ListenerDispatch.dispatch(DefaultListenerManager.java:346)
org.gradle.internal.event.DefaultListenerManager$EventBroadcast$ListenerDispatch.dispatch(DefaultListenerManager.java:333)
org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:42)
org.gradle.internal.event.BroadcastDispatch$SingletonDispatch.dispatch(BroadcastDispatch.java:230)
org.gradle.internal.event.BroadcastDispatch$SingletonDispatch.dispatch(BroadcastDispatch.java:149)
org.gradle.internal.event.AbstractBroadcastDispatch.dispatch(AbstractBroadcastDispatch.java:58)
org.gradle.internal.event.BroadcastDispatch$CompositeDispatch.dispatch(BroadcastDispatch.java:324)
org.gradle.internal.event.BroadcastDispatch$CompositeDispatch.dispatch(BroadcastDispatch.java:234)
org.gradle.internal.event.ListenerBroadcast.dispatch(ListenerBroadcast.java:140)
org.gradle.internal.event.ListenerBroadcast.dispatch(ListenerBroadcast.java:37)
org.gradle.internal.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
com.sun.proxy.$Proxy13.projectsEvaluated(Unknown Source)
org.gradle.initialization.DefaultGradleLauncher$NotifyProjectsEvaluatedListeners.run(DefaultGradleLauncher.java:407)
org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:301)
org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:293)
org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:175)
org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
org.gradle.initialization.DefaultGradleLauncher.projectsEvaluated(DefaultGradleLauncher.java:428)
org.gradle.initialization.DefaultGradleLauncher.access$1400(DefaultGradleLauncher.java:50)
org.gradle.initialization.DefaultGradleLauncher$ConfigureBuild.run(DefaultGradleLauncher.java:305)
org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:301)
org.gradle.internal.operations.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:293)
org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:175)
org.gradle.internal.operations.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
org.gradle.internal.operations.DelegatingBuildOperationExecutor.run(DelegatingBuildOperationExecutor.java:31)
org.gradle.initialization.DefaultGradleLauncher.configureBuild(DefaultGradleLauncher.java:210)
org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:151)
org.gradle.initialization.DefaultGradleLauncher.executeTasks(DefaultGradleLauncher.java:134)
org.gradle.internal.invocation.GradleBuildController$1.execute(GradleBuildController.java:58)
org.gradle.internal.invocation.GradleBuildController$1.execute(GradleBuildController.java:55)
org.gradle.internal.invocation.GradleBuildController$3.create(GradleBuildController.java:82)
org.gradle.internal.invocation.GradleBuildController$3.create(GradleBuildController.java:75)
org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:183)
org.gradle.internal.work.StopShieldingWorkerLeaseService.withLocks(StopShieldingWorkerLeaseService.java:40)
org.gradle.internal.invocation.GradleBuildController.doBuild(GradleBuildController.java:75)
org.gradle.internal.invocation.GradleBuildController.run(GradleBuildController.java:55)
org.gradle.tooling.internal.provider.runner.ClientProvidedPhasedActionRunner.run(ClientProvidedPhasedActionRunner.java:60)
org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
org.gradle.launcher.exec.BuildOutcomeReportingBuildActionRunner.run(BuildOutcomeReportingBuildActionRunner.java:58)
org.gradle.tooling.internal.provider.ValidatingBuildActionRunner.run(ValidatingBuildActionRunner.java:32)
org.gradle.launcher.exec.BuildCompletionNotifyingBuildActionRunner.run(BuildCompletionNotifyingBuildActionRunner.java:39)
org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner$3.call(RunAsBuildOperationBuildActionRunner.java:49)
org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner$3.call(RunAsBuildOperationBuildActionRunner.java:44)
org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:315)
org.gradle.internal.operations.DefaultBuildOperationExecutor$CallableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:305)
org.gradle.internal.operations.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:175)
org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:101)
org.gradle.internal.operations.DelegatingBuildOperationExecutor.call(DelegatingBuildOperationExecutor.java:36)
org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner.run(RunAsBuildOperationBuildActionRunner.java:44)
org.gradle.launcher.exec.InProcessBuildActionExecuter$1.transform(InProcessBuildActionExecuter.java:49)
org.gradle.launcher.exec.InProcessBuildActionExecuter$1.transform(InProcessBuildActionExecuter.java:46)
org.gradle.composite.internal.DefaultRootBuildState.run(DefaultRootBuildState.java:78)
org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:46)
org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:31)
org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:42)
org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:28)
org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:78)
org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:52)
org.gradle.tooling.internal.provider.SubscribableBuildActionExecuter.execute(SubscribableBuildActionExecuter.java:59)
org.gradle.tooling.internal.provider.SubscribableBuildActionExecuter.execute(SubscribableBuildActionExecuter.java:36)
org.gradle.tooling.internal.provider.SessionScopeBuildActionExecuter.execute(SessionScopeBuildActionExecuter.java:68)
org.gradle.tooling.internal.provider.SessionScopeBuildActionExecuter.execute(SessionScopeBuildActionExecuter.java:38)
org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:37)
org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:26)
org.gradle.tooling.internal.provider.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:43)
org.gradle.tooling.internal.provider.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:29)
org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:60)
org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:32)
org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:55)
org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:41)
org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:48)
org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:32)
org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:67)
org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:37)
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26)
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34)
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:74)
org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:72)
org.gradle.util.Swapper.swap(Swapper.java:38)
org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:72)
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
org.gradle.launcher.daemon.server.exec.LogAndCheckHealth.execute(LogAndCheckHealth.java:55)
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:62)
org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:81)
org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:104)
org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50)
org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:295)
org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
java.lang.Thread.run(Thread.java:745)