Loai Loai - 1 month ago 9
Android Question

Cannot invoke method hasAnnotation() on null object

I'm Just Trying to Upgrade Realm Database from 0.86 to 2.1 version.

but facing this Error Along With Android Studio

Error:Execution failed for task ':app:transformClassesWithRealmTransformerForDebug'.
> Cannot invoke method hasAnnotation() on null object


UPDATE (3)

clean assemble --stacktrace --info
Starting Build
Creating configuration compile
Creating configuration apk
Creating configuration provided
Creating configuration wearApp
Creating configuration annotationProcessor
Creating configuration androidTestCompile
Creating configuration androidTestApk
Creating configuration androidTestProvided
Creating configuration androidTestWearApp
Creating configuration androidTestAnnotationProcessor
Creating configuration testCompile
Creating configuration testApk
Creating configuration testProvided
Creating configuration testWearApp
Creating configuration testAnnotationProcessor
Creating configuration debugCompile
Creating configuration debugApk
Creating configuration debugProvided
Creating configuration debugWearApp
Creating configuration debugAnnotationProcessor
Creating configuration testDebugCompile
Creating configuration testDebugApk
Creating configuration testDebugProvided
Creating configuration testDebugWearApp
Creating configuration testDebugAnnotationProcessor
Creating configuration releaseCompile
Creating configuration releaseApk
Creating configuration releaseProvided
Creating configuration releaseWearApp
Creating configuration releaseAnnotationProcessor
Creating configuration testReleaseCompile
Creating configuration testReleaseApk
Creating configuration testReleaseProvided
Creating configuration testReleaseWearApp
Creating configuration testReleaseAnnotationProcessor
Parsing the SDK, no caching allowed
Parsing D:\Android\sdk\add-ons\addon-google_apis-google-23\package.xml
Parsing D:\Android\sdk\build-tools\23.0.2\package.xml
Parsing D:\Android\sdk\build-tools\23.0.3\package.xml
Parsing D:\Android\sdk\build-tools\24.0.0-preview\package.xml
Parsing D:\Android\sdk\build-tools\24.0.1\package.xml
Parsing D:\Android\sdk\build-tools\24.0.3\package.xml
Parsing D:\Android\sdk\build-tools\25.0.0\package.xml
Parsing D:\Android\sdk\extras\android\m2repository\package.xml
Parsing D:\Android\sdk\extras\android\support\package.xml
Parsing D:\Android\sdk\extras\google\google_play_services\package.xml
Parsing D:\Android\sdk\extras\google\m2repository\package.xml
Parsing D:\Android\sdk\extras\google\usb_driver\package.xml


* Exception is:
org.gradle.api.tasks.TaskExecutionException: Execution failed for task ':app:transformClassesWithRealmTransformerForDebug'.
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:66)
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:153)
at org.gradle.internal.Factories$1.create(Factories.java:22)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:53)
at org.gradle.initialization.DefaultGradleLauncher.doBuildStages(DefaultGradleLauncher.java:150)
at org.gradle.initialization.DefaultGradleLauncher.access$200(DefaultGradleLauncher.java:32)
at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:98)
at org.gradle.initialization.DefaultGradleLauncher$1.create(DefaultGradleLauncher.java:92)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:91)
at org.gradle.internal.progress.DefaultBuildOperationExecutor.run(DefaultBuildOperationExecutor.java:63)
at org.gradle.initialization.DefaultGradleLauncher.doBuild(DefaultGradleLauncher.java:92)
at org.gradle.initialization.DefaultGradleLauncher.run(DefaultGradleLauncher.java:83)
at org.gradle.launcher.exec.InProcessBuildActionExecuter$DefaultBuildController.run(InProcessBuildActionExecuter.java:99)
at org.gradle.tooling.internal.provider.ExecuteBuildActionRunner.run(ExecuteBuildActionRunner.java:28)
at org.gradle.launcher.exec.ChainingBuildActionRunner.run(ChainingBuildActionRunner.java:35)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:48)
at org.gradle.launcher.exec.InProcessBuildActionExecuter.execute(InProcessBuildActionExecuter.java:30)
at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:81)
at org.gradle.launcher.exec.ContinuousBuildActionExecuter.execute(ContinuousBuildActionExecuter.java:46)
at org.gradle.launcher.exec.DaemonUsageSuggestingBuildActionExecuter.execute(DaemonUsageSuggestingBuildActionExecuter.java:51)
at org.gradle.launcher.exec.DaemonUsageSuggestingBuildActionExecuter.execute(DaemonUsageSuggestingBuildActionExecuter.java:28)
at org.gradle.launcher.cli.RunBuildAction.run(RunBuildAction.java:43)
at org.gradle.internal.Actions$RunnableActionAdapter.execute(Actions.java:173)
at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:239)
at org.gradle.launcher.cli.CommandLineActionFactory$ParseAndBuildAction.execute(CommandLineActionFactory.java:212)
at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:35)
at org.gradle.launcher.cli.JavaRuntimeValidationAction.execute(JavaRuntimeValidationAction.java:24)
at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:33)
at org.gradle.launcher.cli.ExceptionReportingAction.execute(ExceptionReportingAction.java:22)
at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:205)
at org.gradle.launcher.cli.CommandLineActionFactory$WithLogging.execute(CommandLineActionFactory.java:169)
at org.gradle.launcher.Main.doAction(Main.java:33)
at org.gradle.launcher.bootstrap.EntryPoint.run(EntryPoint.java:45)
at org.gradle.launcher.bootstrap.ProcessBootstrap.runNoExit(ProcessBootstrap.java:55)
at org.gradle.launcher.bootstrap.ProcessBootstrap.run(ProcessBootstrap.java:36)
at org.gradle.launcher.GradleMain.main(GradleMain.java:23)
at org.gradle.wrapper.BootstrapMainStarter.start(BootstrapMainStarter.java:33)
at org.gradle.wrapper.WrapperExecutor.execute(WrapperExecutor.java:130)
at org.gradle.wrapper.GradleWrapperMain.main(GradleWrapperMain.java:48)
Caused by: java.lang.NullPointerException: Cannot invoke method hasAnnotation() on null object
at io.realm.transformer.RealmTransformer$_transform_closure7.doCall(RealmTransformer.groovy:115)
at io.realm.transformer.RealmTransformer.transform(RealmTransformer.groovy:112)
at com.android.build.api.transform.Transform.transform(Transform.java:290)
at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:178)
at com.android.build.gradle.internal.pipeline.TransformTask$2.call(TransformTask.java:174)
at com.android.builder.profile.ThreadRecorder.record(ThreadRecorder.java:156)
at com.android.build.gradle.internal.pipeline.TransformTask.transform(TransformTask.java:173)
at org.gradle.internal.reflect.JavaMethod.invoke(JavaMethod.java:75)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.doExecute(AnnotationProcessingTaskFactory.java:245)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:221)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$IncrementalTaskAction.execute(AnnotationProcessingTaskFactory.java:232)
at org.gradle.api.internal.project.taskfactory.AnnotationProcessingTaskFactory$StandardTaskAction.execute(AnnotationProcessingTaskFactory.java:210)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeAction(ExecuteActionsTaskExecuter.java:80)
at org.gradle.api.internal.tasks.execution.ExecuteActionsTaskExecuter.executeActions(ExecuteActionsTaskExecuter.java:61)
... 60 more


BUILD FAILED

Total time: 20.365 secs
Stopped 0 compiler daemon(s).


Without any Reason this stopped the app to get running.

Any Solution for that ?

Answer

So according to your stack trace, this line fails in the Realm-Transformer:

def allModelClasses = allClassNames

.findAll { it.endsWith('RealmProxy') }

.collect { classPool.getCtClass(it).superclass }

.findAll { it.hasAnnotation(RealmClass.class) || it.superclass.hasAnnotation(RealmClass.class) }

So it says "if you have a class that ends with RealmProxy" which you do as per this question where you literally have a class named RealmProxy, then it tries to get its superclass (which ought to be RealmObject or RealmModel) which it DOESN'T have because it's NOT part of the Realm schema, so it returns null and the transformer crashes.

Solution 1: rename your RealmProxy class to something like, RealmFacade or something

or

Solution 2: extend some random class with RealmProxy that doesn't have @RealmClass annotation.

public abstract class RealmProxyBase {
}

public class RealmProxy extends RealmProxyBase implements Closeable { 
   // ...

(in the meantime, I filed an issue for it here)

Comments