Kotlin：在Activity中使用BroadcastReceiver时未解析的本地类
不时编译项目时，我得到这个错误：
Error:java.lang.UnsupportedOperationException: Unresolved local class: com/myproject/activities/BaseActivity$broadcastReceiver$1 at org.jetbrains.kotlin.descriptors.NotFoundClasses$classes$1.invoke(NotFoundClasses.kt:44) at org.jetbrains.kotlin.descriptors.NotFoundClasses$classes$1.invoke(NotFoundClasses.kt:32) at org.jetbrains.kotlin.storage.LockBasedStorageManager$MapBasedMemoizedFunction.invoke(LockBasedStorageManager.java:408) at org.jetbrains.kotlin.storage.LockBasedStorageManager$MapBasedMemoizedFunctionToNotNull.invoke(LockBasedStorageManager.java:483) at org.jetbrains.kotlin.descriptors.NotFoundClasses.getClass(NotFoundClasses.kt:101) at org.jetbrains.kotlin.serialization.deserialization.TypeDeserializer$typeConstructor$1.invoke(TypeDeserializer.kt:120) at org.jetbrains.kotlin.serialization.deserialization.TypeDeserializer.typeConstructor(TypeDeserializer.kt:124) at org.jetbrains.kotlin.serialization.deserialization.TypeDeserializer.simpleType(TypeDeserializer.kt:82) at org.jetbrains.kotlin.serialization.deserialization.TypeDeserializer.type(TypeDeserializer.kt:70) at org.jetbrains.kotlin.serialization.deserialization.TypeDeserializer.type$default(TypeDeserializer.kt:62) at org.jetbrains.kotlin.serialization.deserialization.MemberDeserializer.loadProperty(MemberDeserializer.kt:67) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedMemberScope.computeProperties(DeserializedMemberScope.kt:123) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedMemberScope.access$computeProperties(DeserializedMemberScope.kt:35) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedMemberScope$properties$1.invoke(DeserializedMemberScope.kt:61) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedMemberScope$properties$1.invoke(DeserializedMemberScope.kt:35) at org.jetbrains.kotlin.storage.LockBasedStorageManager$MapBasedMemoizedFunction.invoke(LockBasedStorageManager.java:408) at org.jetbrains.kotlin.storage.LockBasedStorageManager$MapBasedMemoizedFunctionToNotNull.invoke(LockBasedStorageManager.java:483) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedMemberScope.getContributedVariables(DeserializedMemberScope.kt:137) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedClassDescriptor$DeserializedClassMemberScope.getContributedVariables(DeserializedClassDescriptor.kt:232) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedClassDescriptor$DeserializedClassMemberScope.computeNonDeclaredProperties(DeserializedClassDescriptor.kt:252) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedMemberScope.computeProperties(DeserializedMemberScope.kt:124) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedMemberScope.access$computeProperties(DeserializedMemberScope.kt:35) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedMemberScope$properties$1.invoke(DeserializedMemberScope.kt:61) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedMemberScope$properties$1.invoke(DeserializedMemberScope.kt:35) at org.jetbrains.kotlin.storage.LockBasedStorageManager$MapBasedMemoizedFunction.invoke(LockBasedStorageManager.java:408) at org.jetbrains.kotlin.storage.LockBasedStorageManager$MapBasedMemoizedFunctionToNotNull.invoke(LockBasedStorageManager.java:483) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedMemberScope.getContributedVariables(DeserializedMemberScope.kt:137) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedClassDescriptor$DeserializedClassMemberScope.getContributedVariables(DeserializedClassDescriptor.kt:232) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedMemberScope.addFunctionsAndProperties(DeserializedMemberScope.kt:185) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedMemberScope.computeDescriptors(DeserializedMemberScope.kt:153) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedClassDescriptor$DeserializedClassMemberScope$allDescriptors$1.invoke(DeserializedClassDescriptor.kt:218) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedClassDescriptor$DeserializedClassMemberScope$allDescriptors$1.invoke(DeserializedClassDescriptor.kt:211) at org.jetbrains.kotlin.storage.LockBasedStorageManager$LockBasedLazyValue.invoke(LockBasedStorageManager.java:323) at org.jetbrains.kotlin.storage.LockBasedStorageManager$LockBasedNotNullLazyValue.invoke(LockBasedStorageManager.java:370) at org.jetbrains.kotlin.serialization.deserialization.descriptors.DeserializedClassDescriptor$DeserializedClassMemberScope.getContributedDescriptors(DeserializedClassDescriptor.kt:223) at org.jetbrains.kotlin.resolve.scopes.ResolutionScope$DefaultImpls.getContributedDescriptors$default(ResolutionScope.kt:40) at org.jetbrains.kotlin.resolve.lazy.descriptors.LazyClassMemberScope.computeExtraDescriptors(LazyClassMemberScope.kt:71) at org.jetbrains.kotlin.resolve.lazy.descriptors.LazyClassMemberScope$extraDescriptors$1.invoke(LazyClassMemberScope.kt:58) at org.jetbrains.kotlin.resolve.lazy.descriptors.LazyClassMemberScope$extraDescriptors$1.invoke(LazyClassMemberScope.kt:47) at org.jetbrains.kotlin.storage.LockBasedStorageManager$LockBasedLazyValue.invoke(LockBasedStorageManager.java:323) at org.jetbrains.kotlin.storage.LockBasedStorageManager$LockBasedNotNullLazyValue.invoke(LockBasedStorageManager.java:370) at org.jetbrains.kotlin.resolve.lazy.descriptors.LazyClassMemberScope.getContributedDescriptors(LazyClassMemberScope.kt:64) at org.jetbrains.kotlin.resolve.DescriptorUtils.getAllDescriptors(DescriptorUtils.java:578) at org.jetbrains.kotlin.resolve.lazy.descriptors.LazyClassDescriptor.resolveMemberHeaders(LazyClassDescriptor.java:569) at org.jetbrains.kotlin.resolve.lazy.descriptors.LazyClassDescriptor.doForceResolveAllContents(LazyClassDescriptor.java:539) at org.jetbrains.kotlin.resolve.lazy.descriptors.LazyClassDescriptor.lambda$new$4(LazyClassDescriptor.java:229) at org.jetbrains.kotlin.storage.LockBasedStorageManager$LockBasedLazyValue.invoke(LockBasedStorageManager.java:323) at org.jetbrains.kotlin.resolve.lazy.descriptors.LazyClassDescriptor.forceResolveAllContents(LazyClassDescriptor.java:535) at org.jetbrains.kotlin.resolve.lazy.ForceResolveUtil.doForceResolveAllContents(ForceResolveUtil.java:75) at org.jetbrains.kotlin.resolve.lazy.ForceResolveUtil.forceResolveAllContents(ForceResolveUtil.java:41) at org.jetbrains.kotlin.resolve.jvm.extensions.PartialAnalysisHandlerExtension$doAnalysis$1.invoke(PartialAnalysisHandlerExtension.kt:66) at org.jetbrains.kotlin.resolve.jvm.extensions.PartialAnalysisHandlerExtension$doAnalysis$1.invoke(PartialAnalysisHandlerExtension.kt:34) at org.jetbrains.kotlin.resolve.jvm.extensions.PartialAnalysisHandlerExtension.doForEachDeclaration(PartialAnalysisHandlerExtension.kt:119) at org.jetbrains.kotlin.resolve.jvm.extensions.PartialAnalysisHandlerExtension.doForEachDeclaration(PartialAnalysisHandlerExtension.kt:133) at org.jetbrains.kotlin.resolve.jvm.extensions.PartialAnalysisHandlerExtension.doAnalysis(PartialAnalysisHandlerExtension.kt:61) at org.jetbrains.kotlin.kapt3.AbstractKapt3Extension.doAnalysis(Kapt3Extension.kt:145) at org.jetbrains.kotlin.cli.jvm.compiler.TopDownAnalyzerFacadeForJVM.analyzeFilesWithJavaIntegration(TopDownAnalyzerFacadeForJVM.kt:104) at org.jetbrains.kotlin.cli.jvm.compiler.TopDownAnalyzerFacadeForJVM.analyzeFilesWithJavaIntegration$default(TopDownAnalyzerFacadeForJVM.kt:83) at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler$analyze$1.invoke(KotlinToJVMBytecodeCompiler.kt:376) at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler$analyze$1.invoke(KotlinToJVMBytecodeCompiler.kt:67) at org.jetbrains.kotlin.cli.common.messages.AnalyzerWithCompilerReport.analyzeAndReport(AnalyzerWithCompilerReport.kt:96) at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.analyze(KotlinToJVMBytecodeCompiler.kt:367) at org.jetbrains.kotlin.cli.jvm.compiler.KotlinToJVMBytecodeCompiler.compileModules(KotlinToJVMBytecodeCompiler.kt:132) at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:158) at org.jetbrains.kotlin.cli.jvm.K2JVMCompiler.doExecute(K2JVMCompiler.kt:61) at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.java:107) at org.jetbrains.kotlin.cli.common.CLICompiler.execImpl(CLICompiler.java:51) at org.jetbrains.kotlin.cli.common.CLITool.exec(CLITool.kt:92) at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:353) at org.jetbrains.kotlin.incremental.IncrementalJvmCompilerRunner.runCompiler(IncrementalJvmCompilerRunner.kt:86) at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compileIncrementally(IncrementalCompilerRunner.kt:213) at org.jetbrains.kotlin.incremental.IncrementalCompilerRunner.compile(IncrementalCompilerRunner.kt:83) at org.jetbrains.kotlin.daemon.CompileServiceImpl.execIncrementalCompiler(CompileServiceImpl.kt:515) at org.jetbrains.kotlin.daemon.CompileServiceImpl.access$execIncrementalCompiler(CompileServiceImpl.kt:96) at org.jetbrains.kotlin.daemon.CompileServiceImpl$compile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:399) at org.jetbrains.kotlin.daemon.CompileServiceImpl$compile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:96) at org.jetbrains.kotlin.daemon.CompileServiceImpl$doCompile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:892) at org.jetbrains.kotlin.daemon.CompileServiceImpl$doCompile$$inlined$ifAlive$lambda$2.invoke(CompileServiceImpl.kt:96) at org.jetbrains.kotlin.daemon.common.DummyProfiler.withMeasure(PerfUtils.kt:137) at org.jetbrains.kotlin.daemon.CompileServiceImpl.checkedCompile(CompileServiceImpl.kt:919) at org.jetbrains.kotlin.daemon.CompileServiceImpl.doCompile(CompileServiceImpl.kt:891) at org.jetbrains.kotlin.daemon.CompileServiceImpl.compile(CompileServiceImpl.kt:398) at sun.reflect.GeneratedMethodAccessor100.invoke(Unknown Source) at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) at java.lang.reflect.Method.invoke(Method.java:498) at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:346) at sun.rmi.transport.Transport$1.run(Transport.java:200) at sun.rmi.transport.Transport$1.run(Transport.java:197) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.Transport.serviceCall(Transport.java:196) at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:568) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run0(TCPTransport.java:826) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.lambda$run$0(TCPTransport.java:683) at java.security.AccessController.doPrivileged(Native Method) at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:682) at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142) at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617) at java.lang.Thread.run(Thread.java:745) 我的BaseActivity是这样的：
abstract class BaseActivity : Activity { companion object { private const val LOG_TAG = "BaseActivity" } override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) LocalBroadcastManager.getInstance(this).registerReceiver(broadcastReceiver, IntentFilter(MY_FILTER)) } override fun onStop() { super.onStop() if(isFinishing){ LocalBroadcastManager.getInstance(this).unregisterReceiver(broadcastReceiver) } } private val broadcastReceiver = object : BroadcastReceiver() { override fun onReceive(context: Context?, intent: Intent?) = when (intent?.action) { MY_FILTER -> Log.d(LOG_TAG, "This is my filter!") else -> Log.e(LOG_TAG, "Hello action ${intent?.action}") } } }
这是通过Clean Project和重建来解决的。
不过，我想了解为什么会发生这种情况，以及如何防止这种情况发生。
注意：在使用没有Proguard或其他类似的东西的调试风格时，发生了这种情况。
解决方法是指定variables的确切types，由于某种原因，types推断在这种情况下不起作用（可能是Kotlin错误）。
所以，而不是这个：
private val broadcastReceiver = object : BroadcastReceiver()
用这个：
private val broadcastReceiver: BroadcastReceiver = object : BroadcastReceiver()
看起来像一些错误，我认为它应该在Kotlin问题跟踪器上，但我想现在可以通过将接收器定义为一个类来修复它：
abstract class BaseActivity : Activity { companion object { private const val LOG_TAG = "BaseActivity" } override fun onCreate(savedInstanceState: Bundle?) { super.onCreate(savedInstanceState) LocalBroadcastManager.getInstance(this).registerReceiver(broadcastReceiver, IntentFilter(MY_FILTER)) } override fun onStop() { super.onStop() if(isFinishing){ LocalBroadcastManager.getInstance(this).unregisterReceiver(broadcastReceiver) } } private val broadcastReceiver = MyBroadcastReceiver() inner class MyBroadcastReceiver : BroadcastReceiver() { override fun onReceive(context: Context?, intent: Intent?) = when (intent?.action) { MY_FILTER -> Log.d(LOG_TAG, "This is my filter!") else -> Log.e(LOG_TAG, "Hello action ${intent?.action}") } } }