错误日志：
com.intellij.util.IncorrectOperationException: Incorrect package name: null
at com.intellij.psi.impl.PsiElementFactoryImpl.createPackageStatement(PsiElementFactoryImpl.java:449)
at com.intellij.psi.impl.source.PsiJavaFileBaseImpl.setPackageName(PsiJavaFileBaseImpl.java:125)
at com.android.tools.idea.databinding.psiclass.LightBrClass.<init>(LightBrClass.kt:111)
at com.android.tools.idea.databinding.psiclass.DataBindingClassFactory.getOrCreateBrClassFor(DataBindingClassFactory.java:63)
at com.android.tools.idea.databinding.finders.BrClassFinder$1.compute(BrClassFinder.kt:42)
at com.intellij.psi.impl.PsiCachedValueImpl.doCompute(PsiCachedValueImpl.java:49)
at com.intellij.util.CachedValueBase.lambda$getValueWithLock$0(CachedValueBase.java:236)
at com.intellij.openapi.util.RecursionManager$1.doPreventingRecursion(RecursionManager.java:116)
at com.intellij.util.CachedValueBase.getValueWithLock(CachedValueBase.java:237)
at com.intellij.psi.impl.PsiCachedValueImpl.getValue(PsiCachedValueImpl.java:38)
at com.android.tools.idea.databinding.finders.BrClassFinder.findClass(BrClassFinder.kt:66)
at com.android.tools.idea.databinding.finders.BrClassFinder.findClasses(BrClassFinder.kt:71)
at com.android.tools.idea.databinding.finders.BrClassFinder.getClasses(BrClassFinder.kt:55)
at com.intellij.psi.impl.JavaPsiFacadeImpl.getClasses(JavaPsiFacadeImpl.java:293)
at com.intellij.psi.impl.file.PsiPackageImpl.getClasses(PsiPackageImpl.java:158)
at com.intellij.psi.impl.file.PsiPackageImpl.processDeclarations(PsiPackageImpl.java:317)
at com.intellij.psi.impl.source.PsiJavaFileBaseImpl.processPackageDeclarations(PsiJavaFileBaseImpl.java:484)
at com.intellij.psi.impl.source.PsiJavaFileBaseImpl.processCurrentPackage(PsiJavaFileBaseImpl.java:398)
at com.intellij.psi.impl.source.PsiJavaFileBaseImpl.processDeclarationsNoGuess(PsiJavaFileBaseImpl.java:334)
at com.intellij.psi.impl.source.PsiJavaFileBaseImpl.access$200(PsiJavaFileBaseImpl.java:40)
at com.intellij.psi.impl.source.PsiJavaFileBaseImpl$MyCacheBuilder.compute(PsiJavaFileBaseImpl.java:595)
at com.intellij.psi.impl.PsiCachedValueImpl.doCompute(PsiCachedValueImpl.java:49)
at com.intellij.util.CachedValueBase.lambda$getValueWithLock$0(CachedValueBase.java:236)
at com.intellij.openapi.util.RecursionManager$1.doPreventingRecursion(RecursionManager.java:116)
at com.intellij.util.CachedValueBase.getValueWithLock(CachedValueBase.java:237)
at com.intellij.psi.impl.PsiCachedValueImpl.getValue(PsiCachedValueImpl.java:38)
at com.intellij.psi.impl.source.PsiJavaFileBaseImpl.processDeclarations(PsiJavaFileBaseImpl.java:314)
at com.intellij.psi.scope.util.PsiScopesUtil.treeWalkUp(PsiScopesUtil.java:69)
at com.intellij.psi.scope.util.PsiScopesUtil.treeWalkUp(PsiScopesUtil.java:51)
at com.intellij.psi.scope.util.PsiScopesUtil.resolveAndWalk(PsiScopesUtil.java:218)
at com.intellij.psi.scope.util.PsiScopesUtil.resolveAndWalk(PsiScopesUtil.java:149)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.resolve(PsiJavaCodeReferenceElementImpl.java:501)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.resolve(PsiJavaCodeReferenceElementImpl.java:534)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.access$100(PsiJavaCodeReferenceElementImpl.java:44)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl$OurGenericsResolver.resolve(PsiJavaCodeReferenceElementImpl.java:383)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl$OurGenericsResolver.resolve(PsiJavaCodeReferenceElementImpl.java:375)
at com.intellij.psi.impl.source.resolve.ResolveCache.lambda$resolveWithCaching$1(ResolveCache.java:203)
at com.intellij.openapi.util.RecursionManager$1.doPreventingRecursion(RecursionManager.java:116)
at com.intellij.psi.impl.source.resolve.ResolveCache.resolveWithCaching(ResolveCache.java:202)
at com.intellij.psi.impl.PsiImplUtil.multiResolveImpl(PsiImplUtil.java:797)
at com.intellij.psi.impl.PsiImplUtil.multiResolveImpl(PsiImplUtil.java:788)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.multiResolve(PsiJavaCodeReferenceElementImpl.java:434)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.advancedResolve(PsiJavaCodeReferenceElementImpl.java:427)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.resolve(PsiJavaCodeReferenceElementImpl.java:359)
at com.intellij.psi.impl.source.resolve.ClassResolverProcessor.<init>(ClassResolverProcessor.java:54)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.resolve(PsiJavaCodeReferenceElementImpl.java:500)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.resolve(PsiJavaCodeReferenceElementImpl.java:534)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.access$100(PsiJavaCodeReferenceElementImpl.java:44)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl$OurGenericsResolver.resolve(PsiJavaCodeReferenceElementImpl.java:383)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl$OurGenericsResolver.resolve(PsiJavaCodeReferenceElementImpl.java:375)
at com.intellij.psi.impl.source.resolve.ResolveCache.lambda$resolveWithCaching$1(ResolveCache.java:203)
at com.intellij.openapi.util.RecursionManager$1.doPreventingRecursion(RecursionManager.java:116)
at com.intellij.psi.impl.source.resolve.ResolveCache.resolveWithCaching(ResolveCache.java:202)
at com.intellij.psi.impl.PsiImplUtil.multiResolveImpl(PsiImplUtil.java:797)
at com.intellij.psi.impl.PsiImplUtil.multiResolveImpl(PsiImplUtil.java:788)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.multiResolve(PsiJavaCodeReferenceElementImpl.java:434)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.advancedResolve(PsiJavaCodeReferenceElementImpl.java:427)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.resolve(PsiJavaCodeReferenceElementImpl.java:359)
at com.intellij.psi.impl.source.resolve.ClassResolverProcessor.<init>(ClassResolverProcessor.java:54)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.resolve(PsiJavaCodeReferenceElementImpl.java:500)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.resolve(PsiJavaCodeReferenceElementImpl.java:534)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.access$100(PsiJavaCodeReferenceElementImpl.java:44)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl$OurGenericsResolver.resolve(PsiJavaCodeReferenceElementImpl.java:383)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl$OurGenericsResolver.resolve(PsiJavaCodeReferenceElementImpl.java:375)
at com.intellij.psi.impl.source.resolve.ResolveCache.lambda$resolveWithCaching$1(ResolveCache.java:203)
at com.intellij.openapi.util.RecursionManager$1.doPreventingRecursion(RecursionManager.java:116)
at com.intellij.psi.impl.source.resolve.ResolveCache.resolveWithCaching(ResolveCache.java:202)
at com.intellij.psi.impl.PsiImplUtil.multiResolveImpl(PsiImplUtil.java:797)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.getCanonicalText(PsiJavaCodeReferenceElementImpl.java:297)
at com.intellij.psi.impl.source.PsiJavaCodeReferenceElementImpl.getCanonicalText(PsiJavaCodeReferenceElementImpl.java:281)
at com.intellij.psi.impl.source.tree.java.PsiAnnotationImpl.getQualifiedName(PsiAnnotationImpl.java:88)
at com.intellij.codeInsight.AnnotationUtil.findOwnAnnotations(AnnotationUtil.java:107)
at com.intellij.codeInsight.AnnotationUtil.findAllAnnotations(AnnotationUtil.java:84)
at com.intellij.codeInsight.AnnotationUtil.findAnnotation(AnnotationUtil.java:66)
at com.intellij.codeInsight.AnnotationUtil.findAnnotation(AnnotationUtil.java:50)
at com.intellij.codeInsight.AnnotationUtil.findAnnotation(AnnotationUtil.java:43)
at com.intellij.psi.impl.PsiImplUtil.isDeprecatedByAnnotation(PsiImplUtil.java:449)
at com.intellij.psi.stub.JavaStubImplUtil.isMemberDeprecated(JavaStubImplUtil.java:54)
at com.intellij.psi.impl.source.PsiClassImpl.isDeprecated(PsiClassImpl.java:413)
at com.intellij.ide.projectView.impl.nodes.BasePsiMemberNode.isDeprecated(BasePsiMemberNode.java:45)
at com.intellij.ide.projectView.impl.nodes.AbstractPsiBasedNode.lambda$doUpdate$1(AbstractPsiBasedNode.java:157)
at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:941)
at com.intellij.ide.projectView.impl.nodes.AbstractPsiBasedNode.doUpdate(AbstractPsiBasedNode.java:138)
at com.intellij.ide.projectView.impl.nodes.AbstractPsiBasedNode.lambda$update$0(AbstractPsiBasedNode.java:134)
at com.intellij.util.AstLoadingFilter.lambda$toComputable$2(AstLoadingFilter.java:169)
at com.intellij.util.AstLoadingFilter.disallowTreeLoading(AstLoadingFilter.java:127)
at com.intellij.util.AstLoadingFilter.disallowTreeLoading(AstLoadingFilter.java:116)
at com.intellij.util.AstLoadingFilter.disallowTreeLoading(AstLoadingFilter.java:111)
at com.intellij.ide.projectView.impl.nodes.AbstractPsiBasedNode.update(AbstractPsiBasedNode.java:134)
at com.intellij.ide.util.treeView.PresentableNodeDescriptor.getUpdatedPresentation(PresentableNodeDescriptor.java:89)
at com.intellij.ide.util.treeView.PresentableNodeDescriptor.update(PresentableNodeDescriptor.java:41)
at com.intellij.ide.util.treeView.AbstractTreeBuilder.updateNodeDescriptor(AbstractTreeBuilder.java:496)
at com.intellij.ide.util.treeView.AbstractTreeUi$20.perform(AbstractTreeUi.java:923)
at com.intellij.ide.util.treeView.TreeRunnable.run(TreeRunnable.java:23)
at com.intellij.ide.util.treeView.AbstractTreeUi.execute(AbstractTreeUi.java:1821)
at com.intellij.ide.util.treeView.AbstractTreeUi.update(AbstractTreeUi.java:919)
at com.intellij.ide.util.treeView.AbstractTreeUi.update(AbstractTreeUi.java:871)
at com.intellij.ide.util.treeView.AbstractTreeUi.processExistingNode(AbstractTreeUi.java:2965)
at com.intellij.ide.util.treeView.AbstractTreeUi.lambda$null$5(AbstractTreeUi.java:1684)
at com.intellij.ide.util.treeView.AbstractTreeUi.execute(AbstractTreeUi.java:1800)
at com.intellij.ide.util.treeView.AbstractTreeUi.access$5100(AbstractTreeUi.java:50)
at com.intellij.ide.util.treeView.AbstractTreeUi$30.perform(AbstractTreeUi.java:1766)
at com.intellij.ide.util.treeView.TreeRunnable.run(TreeRunnable.java:23)
at com.intellij.ide.util.treeView.AbstractTreeUi.executeYieldingRequest(AbstractTreeUi.java:2056)
at com.intellij.ide.util.treeView.AbstractTreeUi.access$5700(AbstractTreeUi.java:50)
at com.intellij.ide.util.treeView.AbstractTreeUi$33$1.perform(AbstractTreeUi.java:1968)
at com.intellij.ide.util.treeView.TreeRunnable.run(TreeRunnable.java:23)
at com.intellij.ide.util.treeView.AbstractTreeBuilder.runOnYieldingDone(AbstractTreeBuilder.java:347)
at com.intellij.ide.util.treeView.AbstractTreeUi.runOnYieldingDone(AbstractTreeUi.java:2151)
at com.intellij.ide.util.treeView.AbstractTreeUi$33.perform(AbstractTreeUi.java:1963)
at com.intellij.ide.util.treeView.TreeRunnable.run(TreeRunnable.java:23)
at com.intellij.ide.util.treeView.AbstractTreeBuilder.lambda$yield$1(AbstractTreeBuilder.java:365)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.doRun(LaterInvocator.java:435)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:419)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:403)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:764)
at java.awt.EventQueue.access$500(EventQueue.java:98)
at java.awt.EventQueue$3.run(EventQueue.java:715)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:734)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:757)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:706)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:375)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:105)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:101)
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:93)
at java.awt.EventDispatchThread.run(EventDispatchThread.java:82)
迁移到Android Studio 3.5后，我们在Studio索引编制方面遇到了一些问题。即使建立索引/导航/自动完成也无法正常工作。
[我们有2个即时应用程序模块，一个带有插件'com.android.feature'，另一个带有'com.android.instantapp'。从setings.gradle中删除这两个似乎使Studio满意。
卸载这些模块也可以解决此问题。
有人可以指出问题吗？
com.android.instantapp和com.android.feature插件已弃用。com.android.application与com.android.dynamic-feature组合使用。请参阅此帖子以获取更多信息：https://android-developers.googleblog.com/2019/04/google-play-instant-feature-plugin.html