Question 1

在Android Studio 3.1中，你可以在Build窗口看到错误细节。

打开Build标签。它们在某种程度上是隐藏的，你必须展开Java编译器的节点。你会看到那里的错误。

但是有一个更好的方法来查看错误。你可以点击 "切换视图 "按钮来获得更好的错误视图。这样，你就不必展开每个节点。

Question 2

尝试将你的buildToolsVersion升级到 "23.0.1"，像这样。

compileSdkVersion 23
buildToolsVersion "23.0.1"
如果你没有安装这个版本的buildTools，请用SDKManager下载它作为提示。

Question 3

这种问题真的让我们很焦虑，因为不会提供更多有用的信息。我不知道我们是否真的一样，但我可以提供两种方法来帮助我们尝试解决问题。 1.Firstly you can try to clean or restart your Android Studio & your computer.In China,we have a saying between developers. 小问题，只要重新启动。大问题，应该重新安装。上述说法将帮助你多次解决这类问题。 2.其次我们需要使用一些gradle命令来帮助你找到更多有用的细节。我遇到了类似的情况，如下所示。 org.gradle.initialization.ReportedException: org.gradle.internal.exceptions.LocationAwareException: Execution failed for task ':app:compileDebugJavaWithJavac'. at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:139) at org.gradle.initialization.DefaultGradleLauncher.executeTasks(DefaultGradleLauncher.java:109) at org.gradle.internal.invocation.GradleBuildController$1.call(GradleBuildController.java:78) at org.gradle.internal.invocation.GradleBuildController$1.call(GradleBuildController.java:75) at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:152) at org.gradle.internal.invocation.GradleBuildController.doBuild(GradleBuildController.java:100) at org.gradle.internal.invocation.GradleBuildController.run(GradleBuildController.java:75) at org.gradle.tooling.internal.provider.runner.BuildModelActionRunner.run(BuildModelActionRunner.java:53) at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35) at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35) at org.gradle.tooling.internal.provider.ValidatingBuildActionRunner.run(ValidatingBuildActionRunner.java:32) at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner$1.run(RunAsBuildOperationBuildActionRunner.java:43) at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336) at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328) at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199) at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110) at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner.run(RunAsBuildOperationBuildActionRunner.java:40) at org.gradle.tooling.internal.provider.SubscribableBuildActionRunner.run(SubscribableBuildActionRunner.java:51) at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:47) at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:30) at org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:39) at org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:25) at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:80) at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:53) at org.gradle.tooling.internal.provider.ServicesSetupBuildActionExecuter.execute(ServicesSetupBuildActionExecuter.java:57) at org.gradle.tooling.internal.provider.ServicesSetupBuildActionExecuter.execute(ServicesSetupBuildActionExecuter.java:32) 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.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:43) at org.gradle.tooling.internal.provider.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:29) at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:69) at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:30) at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:59) at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:44) at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:45) at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:30) at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:67) at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:37) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:74) at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:72) at org.gradle.util.Swapper.swap(Swapper.java:38) at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:72) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.LogAndCheckHealth.execute(LogAndCheckHealth.java:55) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:62) at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:82) at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50) at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:295) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55) at java.lang.Thread.run(Thread.java:745) Caused by: org.gradle.internal.exceptions.LocationAwareException: Execution failed for task ':app:compileDebugJavaWithJavac'. at org.gradle.initialization.DefaultExceptionAnalyser.transform(DefaultExceptionAnalyser.java:74) at org.gradle.initialization.MultipleBuildFailuresExceptionAnalyser.transform(MultipleBuildFailuresExceptionAnalyser.java:47) at org.gradle.initialization.StackTraceSanitizingExceptionAnalyser.transform(StackTraceSanitizingExceptionAnalyser.java:30) at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:137) at org.gradle.initialization.DefaultGradleLauncher.executeTasks(DefaultGradleLauncher.java:109) at org.gradle.internal.invocation.GradleBuildController$1.call(GradleBuildController.java:78) at org.gradle.internal.invocation.GradleBuildController$1.call(GradleBuildController.java:75) at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:152) at org.gradle.internal.invocation.GradleBuildController.doBuild(GradleBuildController.java:100) at org.gradle.internal.invocation.GradleBuildController.run(GradleBuildController.java:75) at org.gradle.tooling.internal.provider.runner.BuildModelActionRunner.run(BuildModelActionRunner.java:53) at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35) at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35) at org.gradle.tooling.internal.provider.ValidatingBuildActionRunner.run(ValidatingBuildActionRunner.java:32) at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner$1.run(RunAsBuildOperationBuildActionRunner.java:43) at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336) at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328) at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199) at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110) at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner.run(RunAsBuildOperationBuildActionRunner.java:40) at org.gradle.tooling.internal.provider.SubscribableBuildActionRunner.run(SubscribableBuildActionRunner.java:51) at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:47) at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:30) at org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:39) at org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:25) at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:80) at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:53) at org.gradle.tooling.internal.provider.ServicesSetupBuildActionExecuter.execute(ServicesSetupBuildActionExecuter.java:57) at org.gradle.tooling.internal.provider.ServicesSetupBuildActionExecuter.execute(ServicesSetupBuildActionExecuter.java:32) 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.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:43) at org.gradle.tooling.internal.provider.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:29) at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:69) at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:30) at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:59) at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:44) at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:45) at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:30) at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:67) at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:37) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:74) at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:72) at org.gradle.util.Swapper.swap(Swapper.java:38) at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:72) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.LogAndCheckHealth.execute(LogAndCheckHealth.java:55) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:62) at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:82) at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36) at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122) at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50) at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:295) at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63) at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46) at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55) Caused by: org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:compileDebugJavaWithJavac'. at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:100) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:70) at org.gradle.api.internal.tasks.execution.OutputDirectoryCreatingTaskExecuter.execute(OutputDirectoryCreatingTaskExecuter.java:51) at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:62) at org.gradle.api.internal.tasks.execution.ResolveTaskOutputCachingStateExecuter.execute(ResolveTaskOutputCachingStateExecuter.java:54) at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:60) at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.java:97) at org.gradle.api.internal.tasks.execution.CleanupStaleOutputsExecuter.execute(CleanupStaleOutputsExecuter.java:87) at org.gradle.api.internal.tasks.execution.ResolveTaskArtifactStateTaskExecuter.execute(ResolveTaskArtifactStateTaskExecuter.java:52) at org.gradle.api.internal.tasks.execution.SkipTaskWithNoActionsExecuter.execute(SkipTaskWithNoActionsExecuter.java:52) at org.gradle.api.internal.tasks.execution.SkipOnlyIfTaskExecuter.execute(SkipOnlyIfTaskExecuter.java:54) at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43) at org.gradle.api.internal.tasks.execution.CatchExceptionTaskExecuter.execute(CatchExceptionTaskExecuter.java:34) at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker$1.run(DefaultTaskGraphExecuter.java:248) at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336) at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328) at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199) at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110) at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:241) at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:230) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.processTask(DefaultTaskPlanExecutor.java:123) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.access$200(DefaultTaskPlanExecutor.java:79) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:104) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker$1.execute(DefaultTaskPlanExecutor.java:98) at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.execute(DefaultTaskExecutionPlan.java:626) at org.gradle.execution.taskgraph.DefaultTaskExecutionPlan.executeWithTask(DefaultTaskExecutionPlan.java:581) at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor$TaskExecutorWorker.run(DefaultTaskPlanExecutor.java:98) ... 3 more Caused by: org.gradle.api.internal.tasks.compile.CompilationFailedException: Compilation failed; see the compiler error output for details. at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:50) at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:35) at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.delegateAndHandleErrors(NormalizingJavaCompiler.java:98) at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.execute(NormalizingJavaCompiler.java:51) at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.execute(NormalizingJavaCompiler.java:37) at org.gradle.api.internal.tasks.compile.CleaningJavaCompilerSupport.execute(CleaningJavaCompilerSupport.java:35) at org.gradle.api.internal.tasks.compile.CleaningJavaCompilerSupport.execute(CleaningJavaCompilerSupport.java:25) at org.gradle.api.internal.tasks.compile.incremental.IncrementalCompilationFinalizer.execute(IncrementalCompilationFinalizer.java:39) at org.gradle.api.internal.tasks.compile.incremental.IncrementalCompilationFinalizer.execute(IncrementalCompilationFinalizer.java:24) at org.gradle.api.tasks.compile.JavaCompile.performCompilation(JavaCompile.java:207) at org.gradle.api.tasks.compile.JavaCompile.compile(JavaCompile.java:133) at com.android.build.gradle.tasks.factory.AndroidJavaCompile.compile(AndroidJavaCompile.java:125) at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:73) at org.gradle.api.internal.project.taskfactory.IncrementalTaskAction.doExecute(IncrementalTaskAction.java:46) at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:39) at org.gradle.api.internal.project.taskfactory.StandardTaskAction.execute(StandardTaskAction.java:26) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter$1.run(ExecuteActionsTaskExecuter.java:121) at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336) at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328) at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199) at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:110) at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:92) ... 29 more 你知道，上面的日志对我们解决这种问题是没有用的。我们需要做一些gradle命令来找到更多有用的信息。注：我使用macOS（10.13）和Android Studio（3.1）。进入你的Android项目目录，执行下面的gradle命令。 ./gradlew assembleDebug --info 注意：如果你在执行上述命令时遇到权限问题，你可以用这个方法来处理。 chmod +x gradlew 然后我得到了这个（一些不重要的部分被省略）。 > Task :app:compileDebugJavaWithJavac FAILED Putting task artifact state for task ':app:compileDebugJavaWithJavac' into context took 0.0 secs. file or directory '/Users/ifeegoo/workspace/android/android-bluetooth-color-lamp-karma-lighting/app/src/debug/java', not found Up-to-date check for task ':app:compileDebugJavaWithJavac' took 0.009 secs. It is not up-to-date because: Task has failed previously. All input files are considered out-of-date for incremental task ':app:compileDebugJavaWithJavac'. Compiling with source level 1.7 and target level 1.7. Creating new cache for classAnalysis, path /Users/ifeegoo/workspace/android/android-bluetooth-color-lamp-karma-lighting/.gradle/4.4.1/javaCompile/classAnalysis.bin, access org.gradle.cache.internal.DefaultCacheAccess@156d7504 Creating new cache for jarAnalysis, path /Users/ifeegoo/workspace/android/android-bluetooth-color-lamp-karma-lighting/.gradle/4.4.1/javaCompile/jarAnalysis.bin, access org.gradle.cache.internal.DefaultCacheAccess@156d7504 Creating new cache for taskJars, path /Users/ifeegoo/workspace/android/android-bluetooth-color-lamp-karma-lighting/.gradle/4.4.1/javaCompile/taskJars.bin, access org.gradle.cache.internal.DefaultCacheAccess@156d7504 Creating new cache for taskHistory, path /Users/ifeegoo/workspace/android/android-bluetooth-color-lamp-karma-lighting/.gradle/4.4.1/javaCompile/taskHistory.bin, access org.gradle.cache.internal.DefaultCacheAccess@156d7504 :app:compileDebugJavaWithJavac - is not incremental (e.g. outputs have changed, no previous execution, etc.). file or directory '/Users/ifeegoo/workspace/android/android-bluetooth-color-lamp-karma-lighting/app/src/debug/java', not found Compiling with JDK Java compiler API. /Users/ifeegoo/workspace/android/android-bluetooth-color-lamp-karma-lighting/app/src/main/java/com/chipsguide/app/colorbluetoothlamp/v2/karmalighting/frags/banner/VideoActivity.java:10: error: package com.android.tedcoder.wkvideoplayer.model does not exist import com.android.tedcoder.wkvideoplayer.model.Video; /Users/ifeegoo/workspace/android/android-bluetooth-color-lamp-karma-lighting/app/src/main/java/com/chipsguide/app/colorbluetoothlamp/v2/karmalighting/frags/banner/VideoActivity.java:11: error: package com.android.tedcoder.wkvideoplayer.model does not exist import com.android.tedcoder.wkvideoplayer.model.VideoUrl; /Users/ifeegoo/workspace/android/android-bluetooth-color-lamp-karma-lighting/app/src/main/java/com/chipsguide/app/colorbluetoothlamp/v2/karmalighting/frags/banner/VideoActivity.java:12: error: package com.android.tedcoder.wkvideoplayer.view does not exist import com.android.tedcoder.wkvideoplayer.view.MediaController; Note: Some input files use or override a deprecated API. Note: Recompile with -Xlint:deprecation for details. Note: Some input files use unchecked or unsafe operations. Note: Recompile with -Xlint:unchecked for details. 35 errors :app:compileDebugJavaWithJavac (Thread[Task worker for ':',5,main]) completed. Took 0.84 secs. FAILURE: Build failed with an exception. * What went wrong: Execution failed for task ':app:compileDebugJavaWithJavac'. > Compilation failed; see the compiler error output for details. * Try: Run with --stacktrace option to get the stack trace. Run with --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 15 actionable tasks: 1 executed, 14 up-to-date 我已经得到了最重要的细节信息，因为有一个模块没有正确导入，导致类找不到。其他一些gradle命令。 *clean project ./gradlew clean *build project ./gradlew build *build for debug package ./gradlew assembleDebug or ./gradlew aD *build for release package ./gradlew assembleRelease or ./gradlew aR *build for release package and install ./gradlew installRelease or ./gradlew iR Release *build for debug package and install ./gradlew installDebug or ./gradlew iD Debug *uninstall release package ./gradlew uninstallRelease or ./gradlew uR *uninstall debug package ./gradlew uninstallDebug or ./gradlew uD *all the above command + "--info" or "--debug" or "--scan" or "--stacktrace" can get more detail information. 如果你不能通过-info获得足够的信息，请使用-debug/-scan/-stacktrace代替。记住，越多的细节越能帮助你解决问题。注意：Gradle命令真的很强大，如果你想做更复杂的操作，特别是关于如何处理调试/发布或多通道或模块，去Android Studio查看Gradle窗口，然后你就会知道如何做了。

Question 4

这是因为你的$JAVA_HOME没有被设置。如果你使用的是Mac。 export JAVA_HOME="/Library/Java/JavaVirtualMachines/jdk1.8.0_65.jdk/Contents/Home" in .bash_profile

Question 5

我已经尝试了所提供的两个答案。但都没有成功。 I think the solution is the following: In your project, go to Gradle Scripts >> build.gradle (Module:app) then remove the lines below (if they present) compileOptions { sourceCompatibility JavaVersion.VERSION_1_7 targetCompatibility JavaVersion.VERSION_1_6 移除后clean的项目，然后再run。不需要设置JAVA_HOME，也不需要改变版本。

Question 6

在项目设置中设置JDK位置

Question 7

如果上述方法对你不起作用，请尝试从.gradle全局文件夹中删除缓存。 Try the following rm -rf ~/.gradle/caches react-native run-android If didn't work, the below worked perfectly for me rm -rf ~/.gradle react-native run-android

Question 8

Update (06/05/2017) 我想用境界安卓系统和所需的ǞǞǞ. Problem is ǞǞǞ conflicts with Jack. 所以我从我的gradle中删除了下面原答案中的Jack选项配置，并做了以下修改。 // --------------------------------------------- // Project build.gradle file // --------------------------------------------- buildscript { repositories { jcenter() dependencies { classpath 'com.android.tools.build:gradle:2.3.1' classpath 'me.tatarka:gradle-retrolambda:3.6.1' classpath "io.realm:realm-gradle-plugin:3.1.4" // NOTE: Do not place your application dependencies here; they belong // in the individual module build.gradle files // --------------------------------------------- // Module build.gradle file // --------------------------------------------- apply plugin: 'com.android.application' apply plugin: 'me.tatarka.retrolambda' apply plugin: 'realm-android' android { compileSdkVersion 25 buildToolsVersion "25.0.2" Tools.jar If you made those changes above 和 you still get the following error: Execution failed for task ':app:compileDebugJavaWithJavac'. com.sun.tools.javac.util.Context.put(Ljava/lang/Class;Ljava/lang/Object;)V Try removing the following file: /Library/Java/Extensions/tools.jar Then: Quit emulator Quit Android Studio Reopen Android Studio Build > Clean Project Run/debug your app onto your device/emulator again 所有的改变都为我解决了这个问题。 Note: 我不确定tools.jar是做什么的，或者它是否重要。就像这个Stackoverflow问题中的其他用途一样。无法在OSX yosemite上构建Java项目我们很不幸地不得不使用AUSKey（澳大利亚政府使用的一些古老的恐龙型Java认证密钥系统，在我们登录澳大利亚商业门户网站之前对我们的电脑进行认证）。我的推测是tools.jar可能是AUSKey的一个JAR文件。 If you're worried, instead of deleting this file, you can make a backup of the whole folder 和 save it somewhere just in case you can't login to Australian Business Portal again. 希望这对您有所帮助 :D Original Answer 我今天（2016年6月27日）遇到了这个问题。 I downloaded Android Studio 2.2 和 updated JDK to 1.8. 除了上述指向正确的JDK路径的答案外，我还必须在我的build.gradle(Module: app)文件中额外指定JDK版本。 compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 The resulting file looks like this: apply plugin: 'com.android.application' android { compileSdkVersion 24 buildToolsVersion "24.0.2" defaultConfig { applicationId "com.mycompany.appname" minSdkVersion 17 targetSdkVersion 24 versionCode 1 versionName "1.0" testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner" jackOptions { enabled true buildTypes { release { minifyEnabled false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' compileOptions { sourceCompatibility JavaVersion.VERSION_1_8 targetCompatibility JavaVersion.VERSION_1_8 dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', { exclude group: 'com.android.support', module: 'support-annotations' compile 'com.android.support:appcompat-v7:24.2.1' testCompile 'junit:junit:4.12' 请注意，如果你遇到了关于Java 8 language features requires Jack enabled的错误，你需要在你的gradle文件中添加以下内容（如上图所示）。 jackOptions { enabled true 做完这些后，我终于在手机上运行了我的新项目应用。

Question 9

我在将Android studio升级到2.2.2版本后遇到了这个问题，我通过使用推荐的嵌入式JDK解决了这个问题。

Question 10

在Android Studio中打开。 File > Project Structure并检查JDK位置是否指向你的JDK 1.8目录。注意：你可以使用compileSdkVersion 24。它是有效的，相信我。要做到这一点，首先要从Oracle下载最新的JDK。

Question 11

I got this issue solved. 我试图编译这个项目 "Waveform Android"----。https://github.com/Semantive/waveform-android 并得到了这个错误。我在Ubuntu 14.04LTS上使用Android studio。我已经安装了JAVA 8。在我的gradle构建脚本文件中，有一些语句，如下所示。 retrolambda { jdk System.getenv("JAVA8_HOME") oldJdk System.getenv("JAVA7_HOME") javaVersion JavaVersion.VERSION_1_7 我改变了"JAVA8_HOME "改为 "JAVA_HOME"因为在我的环境变量中，JAVA主目录被设置为JAVA_HOME，而不是JAVA8_HOME，然后它就成功构建了。在改变构建脚本之后。 retrolambda { jdk System.getenv("JAVA_HOME") oldJdk System.getenv("JAVA7_HOME") javaVersion JavaVersion.VERSION_1_7 或者用另一种方法，你可以创建一个新的环境变量，名为JAVA8_HOME指向正确的JDK位置，但我还没有试过，因为我不希望每个JDK版本都有环境变量。

Question 12

请检查你的应用程序的build.gradle。我也遇到了同样的问题，最后我发现问题出在我的build.gradle文件dependencies{}中，它添加了额外的.jar文件，而这个文件实际上并不存在于我的项目中作为依赖。所以我删除了这个依赖关系，问题就解决了。

Question 13

问题只是出在文件夹的命名上，如果你保存项目的文件夹包含特殊字符，那么就把它们删除。如果错误仍然存在，请尝试保存没有空格的文件夹。

Question 14

我在Mac OS Sierra上遇到了这个问题，我在运行一个反应式原生安卓应用 for the first time: Execution failed for task ':app:compileDebugJavaWithJavac'. > Could not find tools.jar 我把Java开发工具包（JDK）的JAVA HOME环境变量从: export JAVA_HOME='/Library/Internet Plug-Ins/JavaAppletPlugin.plugin/Contents/Home' export JAVA_HOME='/Applications/Android Studio.app/Contents/jre/jdk/Contents/Home' 我在Android Studio中创建了一个项目，并在项目设置中寻找JDK的位置，才知道正确的版本在哪里。

Question 15

我也有同样的问题，已经尝试了所有的解决方案，但无济于事。结果发现，使用Java 9是问题所在.安装一个较低版本的Java (jdk 1.8.0_162) worked for me.

Question 16

只是补充@yuchaozh以上答案这帮助我解决了这个问题。 (我没有代表可以评论) 运行这个以了解你的java版本 ls /Library/Java/JavaVirtualMachines/ 你会得到一个类似的输出。 jdk1.8.0_111.jdk 用你的Java版本替换，并运行此命令导出正确的路径。 export JAVA_HOME="/Library/Java/JavaVirtualMachines/<YOUR_JAVA_VERSION>/Contents/Home"

Question 17

你的gradle文件可能被破坏了。试着运行 ./gradlew --refresh-dependencies 在android studio的终端中。

Question 18

当我试图在我的单元测试中使用retrolambda时，我遇到了这个错误。我没有找到如何让retrolambda在单元测试中工作的解决方案。所以，我在单元测试中使用老式的匿名类而不是lambdas，它对我来说很有效。

Question 19

使用这些设置，它就能正常工作。 android { compileSdkVersion 26 buildToolsVersion '26.0.2' defaultConfig { applicationId "com.pm.motivator" minSdkVersion 15 targetSdkVersion 26 versionCode 1 versionName "1.0"

Question 20

在构建文件的变化编译文件('AF-Android-SDK.jar') to 编译文件('libs/AF-Android-SDK.jar') it will work

Question 21

我也有这样的问题。我和一个使用Mac的开发者团队一起工作，团队中的其他人都在运行Windows。但是我们使用的是Anroid Studio 2.2-beta和jdk 1.8。如果你在Mac上遇到这个问题，这里是如何解决它的。不要使用Android Studio 2.2-beta。我花了几个小时试图在2.2-beta版本中调试这个错误。我通过简单地更换为Android Studio 2.1.3解决了这个问题。.在改变Android Studio的版本后，我们的应用程序立即运行。另外在Android Studio的网站上，在你下载之前，它警告Mac用户在2.2测试版上运行jdk 1.8。我想我应该读一读细小的字体，哈哈。

Question 22

我遇到了同样的错误。 JAVA_HOME 指向正确版本的 JDK。所有支持的库和构建工具都更新了。但仍然面临同样的问题。我在我的项目中使用安卓注解。我添加了一个新的视图......而在Java文件中已经有一个同名的视图。当我运行该项目时，我没有显示该视图已经存在，而是收到了上述错误。如果其他解决方案不起作用，请检查你的java文件错误。

Question 23

如果你使用的是Android+Lambdas，这种情况可能会发生。有时我可以使用Lambdas而没有任何问题，但在其他情况下，项目无法编译，并在编译器中给出异常（当我试图向ScheduledExecutorService.scheduleAtFixedRate传递一个Lambda或一个方法引用时）。在这个链接中，有一个讨论(https://bugs.openjdk.java.net/browse/JDK-8169759)，他们在那里解释了为什么会发生这种情况。同时，我只是在编译器允许的情况下在我的Android项目中使用lambdas。

Question 24

this works for me compileSdkVersion 25 buildToolsVersion '25.0.0'

Question 25

我也遇到了类似的问题，但我不得不手动设置程序文件中的jdk文件夹，所以我建议大家，特别是那些正在升级到java 8的人，直接在android studio的项目设置中，使用嵌入选项或选择文件夹来指向

Question 26

改变build.gradle文件中的任何内容都会重新同步所有内容，错误就会消失。对我来说，我改变了minSdkV版本，它就成功了。不要担心，如果系统崩溃或Android Studio没有正常关闭，就会发生这种情况。

Question 27

在我的案例中，更新butterknife并没有解决这个问题。