一、问题描述
今天在将一个内部SDK集成到一个新的apk时候，编译报错，如下所示：
下午 03:48 Gradle sync failed: Cannot convert a null value to an object of type Dependency.
The following types/formats are supported:
- Instances of Dependency.
- String or CharSequence values, for example 'org.gradle:gradle-core:1.0'.
- Maps, for example [group: 'org.gradle', name: 'gradle-core', version: '1.0'].
- FileCollections, for example files('some.jar', 'someOther.jar').
- Projects, for example project(':some:project:path').
- ClassPathNotation, for example gradleApi().
Comprehensive documentation on dependency notations is available in DSL reference for DependencyHandler type.
Consult IDE log for more details (Help | Show Log) (11 s 626 ms)
其实这个问题很久很久一直出现过一次，过了这么久又出现了一次。居然发现自己没做笔记，这次就记下来吧。
二、问题分析
安装上面的提示，Help | Show Log，然后打开日志分析，如下所示
2.1 打开 Help–>Show Log in Exploreer
打开日志如下所示：
2.2 分析idea.log日志
打开日志分析，如日志所描述，build.gradle’ line: 213行出现了错误
6505 2020-03-11 15:53:06,179 [22178366] INFO - a.AndroidGradleProjectResolver - Exception thrown during task execution
6506 org.gradle.tooling.BuildException: Could not run build action using Gradle distribution 'http://xxx.com/resource/gradle/gradle-4.3-all.zip'.
6507 at org.gradle.tooling.internal.consumer.ExceptionTransformer.transform(ExceptionTransformer.java:51)
6508 at org.gradle.tooling.internal.consumer.ExceptionTransformer.transform(ExceptionTransformer.java:29)
6509 at org.gradle.tooling.internal.consumer.ResultHandlerAdapter.onFailure(ResultHandlerAdapter.java:41)
6510 at org.gradle.tooling.internal.consumer.async.DefaultAsyncConsumerActionExecutor$1$1.run(DefaultAsyncConsumerActionExecutor.java:57)
6511 at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
6512 at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
6513 at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
6514 at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
6515 at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
6516 at java.lang.Thread.run(Thread.java:748)
6517 Caused by: org.gradle.internal.exceptions.LocationAwareException: Build file 'xxx\build.gradle' line: 213
6518 A problem occurred evaluating project ':moment'.
6519 at org.gradle.initialization.DefaultExceptionAnalyser.transform(DefaultExceptionAnalyser.java:74)
6520 at org.gradle.initialization.MultipleBuildFailuresExceptionAnalyser.transform(MultipleBuildFailuresExceptionAnalyser.java:47)
6521 at org.gradle.initialization.StackTraceSanitizingExceptionAnalyser.transform(StackTraceSanitizingExceptionAnalyser.java:30)
6522 at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:137)
6523 at org.gradle.initialization.DefaultGradleLauncher.getConfiguredBuild(DefaultGradleLauncher.java:104)
6524 at org.gradle.internal.invocation.GradleBuildController$2.call(GradleBuildController.java:87)
6525 at org.gradle.internal.invocation.GradleBuildController$2.call(GradleBuildController.java:84)
6526 at org.gradle.internal.work.DefaultWorkerLeaseService.withLocks(DefaultWorkerLeaseService.java:152)
6527 at org.gradle.internal.invocation.GradleBuildController.doBuild(GradleBuildController.java:100)
6528 at org.gradle.internal.invocation.GradleBuildController.configure(GradleBuildController.java:84)
6529 at org.gradle.tooling.internal.provider.runner.ClientProvidedBuildActionRunner.run(ClientProvidedBuildActionRunner.java:65)
6530 at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
6531 at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
6532 at org.gradle.tooling.internal.provider.ValidatingBuildActionRunner.run(ValidatingBuildActionRunner.java:32)
6533 at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner$1.run(RunAsBuildOperationBuildActionRunner.java:43)
6534 at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
6535 at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
6536 at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
6537 at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110)
6538 at org.gradle.launcher.exec.RunAsBuildOperationBuildActionRunner.run(RunAsBuildOperationBuildActionRunner.java:40)
6539 at org.gradle.tooling.internal.provider.SubscribableBuildActionRunner.run(SubscribableBuildActionRunner.java:51)
6540 at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:47)
6541 at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:30)
6542 at org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:39)
6543 at org.gradle.launcher.exec.BuildTreeScopeBuildActionExecuter.execute(BuildTreeScopeBuildActionExecuter.java:25)
6544 at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:80)
6545 at org.gradle.tooling.internal.provider.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:53)
6546 at org.gradle.tooling.internal.provider.ServicesSetupBuildActionExecuter.execute(ServicesSetupBuildActionExecuter.java:57)
6547 at org.gradle.tooling.internal.provider.ServicesSetupBuildActionExecuter.execute(ServicesSetupBuildActionExecuter.java:32)
6548 at org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:36)
6549 at org.gradle.tooling.internal.provider.GradleThreadBuildActionExecuter.execute(GradleThreadBuildActionExecuter.java:25)
6550 at org.gradle.tooling.internal.provider.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:43)
6551 at org.gradle.tooling.internal.provider.ParallelismConfigurationBuildActionExecuter.execute(ParallelismConfigurationBuildActionExecuter.java:29)
6552 at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:64)
6553 at org.gradle.tooling.internal.provider.StartParamsValidatingActionExecuter.execute(StartParamsValidatingActionExecuter.java:29)
6554 at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:59)
6555 at org.gradle.tooling.internal.provider.SessionFailureReportingActionExecuter.execute(SessionFailureReportingActionExecuter.java:44)
6556 at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:45)
6557 at org.gradle.tooling.internal.provider.SetupLoggingActionExecuter.execute(SetupLoggingActionExecuter.java:30)
6558 at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:67)
6559 at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
6560 at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
6561 at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:37)
6562 at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
6563 at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26)
6564 at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
6565 at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34)
6566 at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
6567 at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:74)
6568 at org.gradle.launcher.daemon.server.exec.ForwardClientInput$2.call(ForwardClientInput.java:72)
6569 at org.gradle.util.Swapper.swap(Swapper.java:38)
6570 at org.gradle.launcher.daemon.server.exec.ForwardClientInput.execute(ForwardClientInput.java:72)
6571 at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
6572 at org.gradle.launcher.daemon.server.exec.LogAndCheckHealth.execute(LogAndCheckHealth.java:55)
6573 at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
6574 at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:62)
6575 at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
6576 at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
6577 at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:82)
6578 at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36)
6579 at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:122)
6580 at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50)
6581 at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:295)
6582 at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:63)
6583 at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:46)
6584 at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:55)
6585 Caused by: org.gradle.api.GradleScriptException: A problem occurred evaluating project ':moment'.
6586 at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:92)
6587 at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl$2.run(DefaultScriptPluginFactory.java:209)
6588 at org.gradle.configuration.ProjectScriptTarget.addConfiguration(ProjectScriptTarget.java:77)
6589 at org.gradle.configuration.DefaultScriptPluginFactory$ScriptPluginImpl.apply(DefaultScriptPluginFactory.java:214)
6590 at org.gradle.configuration.BuildOperationScriptPlugin$1.run(BuildOperationScriptPlugin.java:61)
6591 at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
6592 at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
6593 at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
6594 at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110)
6595 at org.gradle.configuration.BuildOperationScriptPlugin.apply(BuildOperationScriptPlugin.java:58)
6596 at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:41)
6597 at org.gradle.configuration.project.BuildScriptProcessor.execute(BuildScriptProcessor.java:26)
6598 at org.gradle.configuration.project.ConfigureActionsProjectEvaluator.evaluate(ConfigureActionsProjectEvaluator.java:34)
6599 at org.gradle.configuration.project.LifecycleProjectEvaluator.doConfigure(LifecycleProjectEvaluator.java:64)
6600 at org.gradle.configuration.project.LifecycleProjectEvaluator.access$100(LifecycleProjectEvaluator.java:34)
6601 at org.gradle.configuration.project.LifecycleProjectEvaluator$ConfigureProject.run(LifecycleProjectEvaluator.java:110)
6602 at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
6603 at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
6604 at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
6605 at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110)
6606 at org.gradle.configuration.project.LifecycleProjectEvaluator.evaluate(LifecycleProjectEvaluator.java:50)
6607 at org.gradle.api.internal.project.DefaultProject.evaluate(DefaultProject.java:656)
6608 at org.gradle.api.internal.project.DefaultProject.evaluate(DefaultProject.java:135)
6609 at org.gradle.execution.TaskPathProjectEvaluator.configure(TaskPathProjectEvaluator.java:35)
6610 at org.gradle.execution.TaskPathProjectEvaluator.configureHierarchy(TaskPathProjectEvaluator.java:62)
6611 at org.gradle.configuration.DefaultBuildConfigurer.configure(DefaultBuildConfigurer.java:38)
6612 at org.gradle.initialization.DefaultGradleLauncher$ConfigureBuild.run(DefaultGradleLauncher.java:249)
6613 at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:336)
6614 at org.gradle.internal.progress.DefaultBuildOperationExecutor$RunnableBuildOperationWorker.execute(DefaultBuildOperationExecutor.java:328)
6615 at org.gradle.internal.progress.DefaultBuildOperationExecutor.execute(DefaultBuildOperationExecutor.java:199)
6616 at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:110)
6617 at org.gradle.initialization.DefaultGradleLauncher.configureBuild(DefaultGradleLauncher.java:167)
6618 at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:126)
6619 ... 62 more
6620 Caused by: org.gradle.internal.typeconversion.UnsupportedNotationException: Cannot convert a null value to an object of type Dependency.
6621 The following types/formats are supported:
6622 - Instances of Dependency.
6623 - String or CharSequence values, for example 'org.gradle:gradle-core:1.0'.
6624 - Maps, for example [group: 'org.gradle', name: 'gradle-core', version: '1.0'].
6625 - FileCollections, for example files('some.jar', 'someOther.jar').
6626 - Projects, for example project(':some:project:path').
6627 - ClassPathNotation, for example gradleApi().
6628
6629 Comprehensive documentation on dependency notations is available in DSL reference for DependencyHandler type.
6630 at org.gradle.internal.typeconversion.ErrorHandlingNotationParser.parseNotation(ErrorHandlingNotationParser.java:56)
6631 at org.gradle.api.internal.artifacts.DefaultDependencyFactory.createDependency(DefaultDependencyFactory.java:45)
6632 at org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.create(DefaultDependencyHandler.java:96)
6633 at org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.doAdd(DefaultDependencyHandler.java:110)
6634 at org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler.access$200(DefaultDependencyHandler.java:45)
6635 at org.gradle.api.internal.artifacts.dsl.dependencies.DefaultDependencyHandler$DynamicMethods.tryInvokeMethod(DefaultDependencyHandler.java:219)
6636 at org.gradle.internal.metaobject.BeanDynamicObject$MetaClassAdapter.invokeMethod(BeanDynamicObject.java:499)
6637 at org.gradle.internal.metaobject.BeanDynamicObject.tryInvokeMethod(BeanDynamicObject.java:191)
6638 at org.gradle.internal.metaobject.CompositeDynamicObject.tryInvokeMethod(CompositeDynamicObject.java:98)
6639 at org.gradle.internal.metaobject.MixInClosurePropertiesAsMethodsDynamicObject.tryInvokeMethod(MixInClosurePropertiesAsMethodsDynamicObject.java:30)
6640 at org.gradle.internal.metaobject.ConfigureDelegate.invokeMethod(ConfigureDelegate.java:59)
6641 at build_b2pvgubvj0mx1t4nmhxg6yz8z$_run_closure2.doCall(C:\CodeForAndroid\Moment\moment\build.gradle:213)
6642 at org.gradle.api.internal.ClosureBackedAction.execute(ClosureBackedAction.java:71)
6643 at org.gradle.util.ConfigureUtil.configureTarget(ConfigureUtil.java:160)
6644 at org.gradle.util.ConfigureUtil.configure(ConfigureUtil.java:106)
6645 at org.gradle.api.internal.project.DefaultProject.dependencies(DefaultProject.java:1151)
6646 at org.gradle.internal.metaobject.BeanDynamicObject$MetaClassAdapter.invokeMethod(BeanDynamicObject.java:479)
6647 at org.gradle.internal.metaobject.BeanDynamicObject.tryInvokeMethod(BeanDynamicObject.java:191)
6648 at org.gradle.internal.metaobject.CompositeDynamicObject.tryInvokeMethod(CompositeDynamicObject.java:98)
6649 at org.gradle.internal.metaobject.MixInClosurePropertiesAsMethodsDynamicObject.tryInvokeMethod(MixInClosurePropertiesAsMethodsDynamicObject.java:30)
6650 at org.gradle.groovy.scripts.BasicScript$ScriptDynamicObject.tryInvokeMethod(BasicScript.java:134)
6651 at org.gradle.internal.metaobject.AbstractDynamicObject.invokeMethod(AbstractDynamicObject.java:160)
6652 at org.gradle.groovy.scripts.BasicScript.invokeMethod(BasicScript.java:83)
6653 at build_b2pvgubvj0mx1t4nmhxg6yz8z.run(C:\CodeForAndroid\Moment\moment\build.gradle:157)
6654 at org.gradle.groovy.scripts.internal.DefaultScriptRunnerFactory$ScriptRunnerImpl.run(DefaultScriptRunnerFactory.java:90)
6655 ... 94 more
2.3 分析build.gradle’ line: 213 行出现的错误
213行写的代码如下所示：
implementation libraries.snmonitors
实际上我们定义的lib库是
versions = [
snmonitor : '2.0.0-oyp-1-dev',
]
libraries = [
snmonitor : "com.oyp:monitor:${versions.snmonitor}",
]
因此我们应该写成 implementation libraries.snmonitor ，这样才和我们定义的版本关联上。
implementation libraries.snmonitor
错误原因就是在使用的地方，写错了定义的库的名字，从而导致无法引用。所以才会提示如下所示的写法是支持的。
The following types/formats are supported:
- Instances of Dependency.
- String or CharSequence values, for example 'org.gradle:gradle-core:1.0'.
- Maps, for example [group: 'org.gradle', name: 'gradle-core', version: '1.0'].
- FileCollections, for example files('some.jar', 'someOther.jar').
- Projects, for example project(':some:project:path').
- ClassPathNotation, for example gradleApi().
Comprehensive documentation on dependency notations is available in DSL reference for DependencyHandler type.
Consult IDE log for more details (Help | Show Log) (5 s 532 ms)
改成正确的引用库之后，重新编译即可成功，如下所示：
三、总结
1、自己在其他的gradle文件中定义版本的话，在引用的时候需要写对，不然无法读取到。
2、也可以直接使用类似于 'org.gradle:gradle-core:1.0'. 或者 [group: 'org.gradle', name: 'gradle-core', version: '1.0'].或者project(':some:project:path').的方式来引用。但是得写对版本号！