1. 홈
  2. 질의 응답
  3. 다음은 빌드시

다음은 빌드시

2016-10-10 2 views
0

에서 NullPointerException이 도착하면 NullPointerException이 발생하는 클래스입니다 :다음은 빌드시

public class PersistentList<T extends RealmObject> extends RealmObject { 
    private String mTitle; 
    private RealmList<T> mValue; 

    public PersistentList(){ 
    } 

    public PersistentList(String title, RealmList<T> value) { 
     mTitle = title; 
     mValue = value; 
    } 

    public RealmList<T> getValue() { 
     return mValue; 
    } 

    public void setValue(RealmList<T> value) { 
     mValue = value; 
    } 

    public void setValue(int[] itemClassesDisplayOrder) { 
     mValue = new RealmList<>(); 
     for (int i=0;i<itemClassesDisplayOrder.length;i++){ 
      mValue.add((T) new RealmInt(itemClassesDisplayOrder[i])); 
     } 
    } 
}

내가 setValue(int[])을 추가 할 때까지 완벽하게 정상적으로 컴파일 된 클래스입니다. 클래스에 관한 logcat에는 오류가없는 것으로 보입니다. 왜 내가 NullPointerException을 얻는 지 알고 싶습니다. 템플릿 매개 변수와

FAILURE: Build failed with an exception. 

* What went wrong: 
Execution failed for task ':app:compileDebugJavaWithJavac'. 
> java.lang.NullPointerException 

* Try: 
Run with --debug option to get more log output. 

* Exception is: 
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:compileDebugJavaWithJavac'. 
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:69) 
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.execute(ExecuteActionsTaskExecuter.java:46) 
    at org.gradle.api.internal.tasks.execution.PostExecutionAnalysisTaskExecuter.execute(PostExecutionAnalysisTaskExecuter.java:35) 
    at org.gradle.api.internal.tasks.execution.SkipUpToDateTaskExecuter.execute(SkipUpToDateTaskExecuter.java:64) 
    at org.gradle.api.internal.tasks.execution.ValidatingTaskExecuter.execute(ValidatingTaskExecuter.java:58) 
    at org.gradle.api.internal.tasks.execution.SkipEmptySourceFilesTaskExecuter.execute(SkipEmptySourceFilesTaskExecuter.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:53) 
    at org.gradle.api.internal.tasks.execution.ExecuteAtMostOnceTaskExecuter.execute(ExecuteAtMostOnceTaskExecuter.java:43) 
    at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:203) 
    at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter$EventFiringTaskWorker.execute(DefaultTaskGraphExecuter.java:185) 
    at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.processTask(AbstractTaskPlanExecutor.java:66) 
    at org.gradle.execution.taskgraph.AbstractTaskPlanExecutor$TaskExecutorWorker.run(AbstractTaskPlanExecutor.java:50) 
    at org.gradle.execution.taskgraph.DefaultTaskPlanExecutor.process(DefaultTaskPlanExecutor.java:25) 
    at org.gradle.execution.taskgraph.DefaultTaskGraphExecuter.execute(DefaultTaskGraphExecuter.java:110) 
    at org.gradle.execution.SelectedTaskExecutionAction.execute(SelectedTaskExecutionAction.java:37) 
    at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:37) 
    at org.gradle.execution.DefaultBuildExecuter.access$000(DefaultBuildExecuter.java:23) 
    at org.gradle.execution.DefaultBuildExecuter$1.proceed(DefaultBuildExecuter.java:43) 
    at org.gradle.execution.DryRunBuildExecutionAction.execute(DryRunBuildExecutionAction.java:32) 
    at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:37) 
    at org.gradle.execution.DefaultBuildExecuter.execute(DefaultBuildExecuter.java:30) 
    at org.gradle.initialization.DefaultGradleLauncher$4.run(DefaultGradleLauncher.java:154) 
    at org.gradle.internal.Factories$1.create(Factories.java:22) 
    at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90) 
    at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:52) 
    at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:151) 
    at org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:32) 
    at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:99) 
    at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:93) 
    at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:90) 
    at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:62) 
    at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:93) 
    at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:82) 
    at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:94) 
    at org.gradle.tooling.internal.provider.runner.BuildModelActionRunner.run(BuildModelActionRunner.java:46) 
    at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35) 
    at org.gradle.tooling.internal.provider.runner.SubscribableBuildActionRunner.run(SubscribableBuildActionRunner.java:58) 
    at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35) 
    at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:43) 
    at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:28) 
    at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:78) 
    at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:48) 
    at org.gradle.launcher.daemon.server.exec.ExecuteBuild.doBuild(ExecuteBuild.java:52) 
    at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36) 
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120) 
    at org.gradle.launcher.daemon.server.exec.WatchForDisconnection.execute(WatchForDisconnection.java:37) 
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120) 
    at org.gradle.launcher.daemon.server.exec.ResetDeprecationLogger.execute(ResetDeprecationLogger.java:26) 
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120) 
    at org.gradle.launcher.daemon.server.exec.RequestStopIfSingleUsedDaemon.execute(RequestStopIfSingleUsedDaemon.java:34) 
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120) 
    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:120) 
    at org.gradle.launcher.daemon.server.health.DaemonHealthTracker.execute(DaemonHealthTracker.java:47) 
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120) 
    at org.gradle.launcher.daemon.server.exec.LogToClient.doBuild(LogToClient.java:66) 
    at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36) 
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120) 
    at org.gradle.launcher.daemon.server.exec.EstablishBuildEnvironment.doBuild(EstablishBuildEnvironment.java:72) 
    at org.gradle.launcher.daemon.server.exec.BuildCommandOnly.execute(BuildCommandOnly.java:36) 
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120) 
    at org.gradle.launcher.daemon.server.health.HintGCAfterBuild.execute(HintGCAfterBuild.java:41) 
    at org.gradle.launcher.daemon.server.api.DaemonCommandExecution.proceed(DaemonCommandExecution.java:120) 
    at org.gradle.launcher.daemon.server.exec.StartBuildOrRespondWithBusy$1.run(StartBuildOrRespondWithBusy.java:50) 
    at org.gradle.launcher.daemon.server.DaemonStateCoordinator$1.run(DaemonStateCoordinator.java:246) 
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:54) 
    at org.gradle.internal.concurrent.StoppableExecutorImpl$1.run(StoppableExecutorImpl.java:40) 
Caused by: java.lang.RuntimeException: java.lang.NullPointerException 
    at com.sun.tools.javac.main.Main.compile(Main.java:553) 
    at com.sun.tools.javac.api.JavacTaskImpl.doCall(JavacTaskImpl.java:129) 
    at com.sun.tools.javac.api.JavacTaskImpl.call(JavacTaskImpl.java:138) 
    at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:45) 
    at org.gradle.api.internal.tasks.compile.JdkJavaCompiler.execute(JdkJavaCompiler.java:33) 
    at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.delegateAndHandleErrors(NormalizingJavaCompiler.java:101) 
    at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.execute(NormalizingJavaCompiler.java:50) 
    at org.gradle.api.internal.tasks.compile.NormalizingJavaCompiler.execute(NormalizingJavaCompiler.java:36) 
    at org.gradle.api.internal.tasks.compile.CleaningJavaCompilerSupport.execute(CleaningJavaCompilerSupport.java:34) 
    at org.gradle.api.internal.tasks.compile.CleaningJavaCompilerSupport.execute(CleaningJavaCompilerSupport.java:25) 
    at org.gradle.api.tasks.compile.JavaCompile.performCompilation(JavaCompile.java:157) 
    at org.gradle.api.tasks.compile.JavaCompile.compile(JavaCompile.java:139) 
    at org.gradle.api.tasks.compile.JavaCompile.compile(JavaCompile.java:93) 
    at com.android.build.gradle.tasks.factory.AndroidJavaCompile.compile(AndroidJavaCompile.java:49) 
    at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:75) 
    at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.doExecute(AnnotationProcessingTaskFactory.java:244) 
    at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:220) 
    at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.execute(AnnotationProcessingTaskFactory.java:231) 
    at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:209) 
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80) 
    at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61) 
    ... 70 more 
Caused by: java.lang.NullPointerException 
    at io.realm.processor.ClassMetaData.checkListTypes(ClassMetaData.java:175) 
    at io.realm.processor.ClassMetaData.generate(ClassMetaData.java:118) 
    at io.realm.processor.RealmProcessor.process(RealmProcessor.java:146) 
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:794) 
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs(JavacProcessingEnvironment.java:705) 
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.access$1800(JavacProcessingEnvironment.java:91) 
    at com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.run(JavacProcessingEnvironment.java:1035) 
    at com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1176) 
    at com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1170) 
    at com.sun.tools.javac.main.JavaCompiler.compile(JavaCompiler.java:856) 
    at com.sun.tools.javac.main.Main.compile(Main.java:523) 
    ... 90 more 


BUILD FAILED 

Total time: 3.913 secs 
Stopped 0 compiler daemon(s).

출처

2016-10-10 shoe

+0

'PersistentList'는'mTitle'과'mValue'가'null'로 기본값으로 인스턴스화 될 가능성이 있습니다. – Makoto

+0

@Makoto 예하지만 메서드에서'mValue'가 초기화되므로 클래스 내에'NullPointerException' 가능성이 없습니다 – shoe

+0

정말 빌드시 예외가 발생합니까? – Henry

답변

1

RealmObjects이 영역에서 지원되지 않습니다 : 여기에

은 Gradle을 콘솔에서 출력됩니다.

그래서이 예외가 발생합니다.

출처

2016-10-11 12:11:13 EpicPandaForce

0

렐름의 github에 문제점을 게시했으며, 제네릭 사용은 지원되지 않는다고 분명히 밝혔습니다. 답변은 다음과 같습니다.

일반적인 유형을 사용하는 것은 지원되지 않습니다. RealmList의 클래스 클래스를 스키마의 일부로 수정해야합니다.

제네릭 형식이 지원되지 않는다는 것을 분명히하기 위해 오류 메시지를 향상시킬 수 있다고 생각합니다.

출처

2016-10-11 17:21:45 shoe

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