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Android Basics: LiveData - missing package declaration in GameViewModel #190

Closed MichalKrasowski closed 8 months ago

MichalKrasowski commented 2 years ago

URL of codelab https://developer.android.com/codelabs/basic-android-kotlin-training-livedata

In which task and step of the codelab can this issue be found? Step 8

Describe the problem Upon filling up the tag, Android Studio complains about missing type declaration.

error: Cannot resolve type 'gameViewModel'
error: cannot generate view binders android.databinding.tool.util.LoggedErrorException: failure, see logs for details.
  Cannot resolve type 'gameViewModel'
    at android.databinding.tool.util.L.printMessage(L.java:134)
    at android.databinding.tool.util.L.e(L.java:107)
    at android.databinding.tool.expr.Expr.getResolvedType(Expr.java:391)
    at android.databinding.tool.expr.ExprModel.lambda$resolveTypes$1(ExprModel.java:626)
    at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
    at android.databinding.tool.expr.ExprModel.resolveTypes(ExprModel.java:626)
    at android.databinding.tool.expr.ExprModel.seal(ExprModel.java:418)
    at android.databinding.tool.LayoutBinder.sealModel(LayoutBinder.java:245)
    at android.databinding.tool.DataBinder.sealModels(DataBinder.java:88)
    at android.databinding.tool.CompilerChef.sealModels(CompilerChef.java:371)
    at android.databinding.annotationprocessor.ProcessExpressions.writeResourceBundle(ProcessExpressions.java:245)
    at android.databinding.annotationprocessor.ProcessExpressions.onHandleStep(ProcessExpressions.java:125)
    at android.databinding.annotationprocessor.ProcessDataBinding$ProcessingStep.runStep(ProcessDataBinding.java:246)
    at android.databinding.annotationprocessor.ProcessDataBinding$ProcessingStep.access$000(ProcessDataBinding.java:231)
    at android.databinding.annotationprocessor.ProcessDataBinding.doProcess(ProcessDataBinding.java:112)
    at android.databinding.annotationprocessor.ProcessDataBinding.process(ProcessDataBinding.java:87)
    at org.jetbrains.kotlin.kapt3.base.incremental.IncrementalProcessor.process(incrementalProcessors.kt:90)
    at org.jetbrains.kotlin.kapt3.base.ProcessorWrapper.process(annotationProcessing.kt:188)
    at jdk.compiler/com.sun.tools.javac.processing.JavacProcessingEnvironment.callProcessor(JavacProcessingEnvironment.java:980)
    at jdk.compiler/com.sun.tools.javac.processing.JavacProcessingEnvironment.discoverAndRunProcs(JavacProcessingEnvironment.java:896)
    at jdk.compiler/com.sun.tools.javac.processing.JavacProcessingEnvironment$Round.run(JavacProcessingEnvironment.java:1222)
    at jdk.compiler/com.sun.tools.javac.processing.JavacProcessingEnvironment.doProcessing(JavacProcessingEnvironment.java:1335)
    at jdk.compiler/com.sun.tools.javac.main.JavaCompiler.processAnnotations(JavaCompiler.java:1258)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.jetbrains.kotlin.kapt3.base.AnnotationProcessingKt.doAnnotationProcessing(annotationProcessing.kt:90)
    at org.jetbrains.kotlin.kapt3.base.AnnotationProcessingKt.doAnnotationProcessing$default(annotationProcessing.kt:31)
    at org.jetbrains.kotlin.kapt3.base.Kapt.kapt(Kapt.kt:45)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.base/java.lang.reflect.Method.invoke(Method.java:566)
    at org.jetbrains.kotlin.gradle.internal.KaptExecution.run(KaptWithoutKotlincTask.kt:288)
    at org.jetbrains.kotlin.gradle.internal.KaptWithoutKotlincTask$KaptExecutionWorkAction.execute(KaptWithoutKotlincTask.kt:243)
    at org.gradle.workers.internal.DefaultWorkerServer.execute(DefaultWorkerServer.java:63)
    at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1.create(NoIsolationWorkerFactory.java:66)
    at org.gradle.workers.internal.NoIsolationWorkerFactory$1$1.create(NoIsolationWorkerFactory.java:62)
    at org.gradle.internal.classloader.ClassLoaderUtils.executeInClassloader(ClassLoaderUtils.java:97)
    at org.gradle.workers.internal.NoIsolationWorkerFactory$1.lambda$execute$0(NoIsolationWorkerFactory.java:62)
    at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:44)
    at org.gradle.workers.internal.AbstractWorker$1.call(AbstractWorker.java:41)
    at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:200)
    at org.gradle.internal.operations.DefaultBuildOperationRunner$CallableBuildOperationWorker.execute(DefaultBuildOperationRunner.java:195)
    at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:75)
    at org.gradle.internal.operations.DefaultBuildOperationRunner$3.execute(DefaultBuildOperationRunner.java:68)
    at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:153)
    at org.gradle.internal.operations.DefaultBuildOperationRunner.execute(DefaultBuildOperationRunner.java:68)
    at org.gradle.internal.operations.DefaultBuildOperationRunner.call(DefaultBuildOperationRunner.java:62)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.lambda$call$2(DefaultBuildOperationExecutor.java:76)
    at org.gradle.internal.operations.UnmanagedBuildOperationWrapper.callWithUnmanagedSupport(UnmanagedBuildOperationWrapper.java:54)
    at org.gradle.internal.operations.DefaultBuildOperationExecutor.call(DefaultBuildOperationExecutor.java:76)
    at org.gradle.workers.internal.AbstractWorker.executeWrappedInBuildOperation(AbstractWorker.java:41)
    at org.gradle.workers.internal.NoIsolationWorkerFactory$1.execute(NoIsolationWorkerFactory.java:59)
    at org.gradle.workers.internal.DefaultWorkerExecutor.lambda$submitWork$2(DefaultWorkerExecutor.java:206)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runExecution(DefaultConditionalExecutionQueue.java:214)
    at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.runBatch(DefaultConditionalExecutionQueue.java:164)
    at org.gradle.internal.work.DefaultConditionalExecutionQueue$ExecutionRunner.run(DefaultConditionalExecutionQueue.java:131)
    at java.base/java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:515)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at org.gradle.internal.concurrent.ExecutorPolicy$CatchAndRecordFailures.onExecute(ExecutorPolicy.java:64)
    at org.gradle.internal.concurrent.ManagedExecutorImpl$1.run(ManagedExecutorImpl.java:48)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at org.gradle.internal.concurrent.ThreadFactoryImpl$ManagedThreadRunnable.run(ThreadFactoryImpl.java:56)
    at java.base/java.lang.Thread.run(Thread.java:829)

FAILURE: Build failed with an exception.

* What went wrong:
Execution failed for task ':app:kaptDebugKotlin'.
> A failure occurred while executing org.jetbrains.kotlin.gradle.internal.KaptWithoutKotlincTask$KaptExecutionWorkAction
   > java.lang.reflect.InvocationTargetException (no error message)

Steps to reproduce? There were missing package declarations at the top of GameViewModel.kt and GameFragment.kt.

image

Versions Android Studio version: 2021.1.1 patch 3 API version of the emulator: 30

Additional information Include screenshots if they would be useful in clarifying the problem. image

android-dev-lxl commented 1 year ago

@MichalKrasowski Thank you for reaching out to us. The package declarations are not given on purpose because to package name and app name could be different for everyone. Also, when you create a Kotlin class file, the package name will be added automatically by the Android Studio. Hope this helps.

The same is mentioned as a note.

image