Android Studio：导航 xml 编辑和设计视图的问题

Question

我们一直在项目中使用导航组件，但偶然发现了一个问题，这似乎是我们的项目和 JetBrains Android 插件独有的问题。我无法确定它开始发生的确切时间，但我在 AS 3.2 发布后注意到了它。

项目构建良好，但是在编辑导航 XML 时，自动完成和突出显示等内容被破坏，Android 支持插件抛出此错误：

java.lang.IllegalArgumentException: Multiple entries with same key: org.jetbrains.android.dom.navigation.NavigationSchema$TypeRef@0=org.jetbrains.android.dom.navigation.NavigationSchema$NavigatorKeyInfo@17d69e53 and org.jetbrains.android.dom.navigation.NavigationSchema$TypeRef@0=org.jetbrains.android.dom.navigation.NavigationSchema$NavigatorKeyInfo@442c4fde
at com.google.common.collect.ImmutableMap.conflictException(ImmutableMap.java:215)
at com.google.common.collect.ImmutableMap.checkNoConflict(ImmutableMap.java:209)
at com.google.common.collect.RegularImmutableMap.checkNoConflictInKeyBucket(RegularImmutableMap.java:147)
at com.google.common.collect.RegularImmutableMap.fromEntryArray(RegularImmutableMap.java:110)
at com.google.common.collect.ImmutableMap$Builder.build(ImmutableMap.java:393)
at org.jetbrains.android.dom.navigation.NavigationSchema.buildCacheKeys(NavigationSchema.java:488)
at org.jetbrains.android.dom.navigation.NavigationSchema.init(NavigationSchema.java:479)
at org.jetbrains.android.dom.navigation.NavigationSchema.createIfNecessary(NavigationSchema.java:389)
at org.jetbrains.android.dom.AttributeProcessingUtil.processNavAttributes(AttributeProcessingUtil.java:408)
at org.jetbrains.android.dom.AttributeProcessingUtil.processAttributes(AttributeProcessingUtil.java:596)
at org.jetbrains.android.dom.AndroidDomExtender.registerExtensions(AndroidDomExtender.java:57)
at org.jetbrains.android.dom.AndroidDomExtender.registerExtensions(AndroidDomExtender.java:29)
at com.intellij.util.xml.reflect.DomExtenderEP.extend(DomExtenderEP.java:83)
at com.intellij.util.xml.impl.DynamicGenericInfo.runDomExtenders(DynamicGenericInfo.java:134)
at com.intellij.util.xml.impl.DynamicGenericInfo.lambda$checkInitialized$0(DynamicGenericInfo.java:64)
at com.intellij.openapi.util.RecursionManager$2.doPreventingRecursion(RecursionManager.java:98)
at com.intellij.util.xml.impl.DynamicGenericInfo.checkInitialized(DynamicGenericInfo.java:63)
at com.intellij.util.xml.impl.DynamicGenericInfo.getAttributeChildrenDescriptions(DynamicGenericInfo.java:241)
at com.intellij.util.xml.impl.DynamicGenericInfo.processAttributeChildrenDescriptions(DynamicGenericInfo.java:254)
at com.intellij.util.xml.impl.DomSemContributor.lambda$registerSemProviders$5(DomSemContributor.java:199)
at com.intellij.semantic.SemServiceImpl$2.lambda$registerSemElementProvider$0(SemServiceImpl.java:93)
at com.intellij.semantic.SemServiceImpl.createSemElements(SemServiceImpl.java:190)
at com.intellij.semantic.SemServiceImpl.getSemElements(SemServiceImpl.java:161)
at com.intellij.semantic.SemService.getSemElement(SemService.java:37)
at com.intellij.util.xml.impl.DomManagerImpl.getDomHandler(DomManagerImpl.java:390)
at com.intellij.util.xml.impl.GenericValueReferenceProvider.getReferencesByElement(GenericValueReferenceProvider.java:47)
at com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistryImpl.getReferences(ReferenceProvidersRegistryImpl.java:135)
at com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistryImpl.mapNotEmptyReferencesFromProviders(ReferenceProvidersRegistryImpl.java:123)
at com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistryImpl.doGetReferencesFromProviders(ReferenceProvidersRegistryImpl.java:102)
at com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistry.getReferencesFromProviders(ReferenceProvidersRegistry.java:50)
at com.intellij.psi.impl.source.resolve.reference.ReferenceProvidersRegistry.getReferencesFromProviders(ReferenceProvidersRegistry.java:44)
at com.intellij.psi.impl.source.xml.XmlAttributeValueImpl.getReferences(XmlAttributeValueImpl.java:110)
at com.intellij.codeInsight.daemon.impl.analysis.XmlHighlightVisitor.checkReferences(XmlHighlightVisitor.java:439)
at com.intellij.codeInsight.daemon.impl.analysis.XmlHighlightVisitor.visitXmlAttributeValue(XmlHighlightVisitor.java:406)
at com.intellij.psi.impl.source.xml.XmlAttributeValueImpl.accept(XmlAttributeValueImpl.java:61)
at com.intellij.codeInsight.daemon.impl.analysis.XmlHighlightVisitor.visit(XmlHighlightVisitor.java:587)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.runVisitors(GeneralHighlightingPass.java:353)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.lambda$collectHighlights$5(GeneralHighlightingPass.java:286)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.analyzeByVisitors(GeneralHighlightingPass.java:313)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.lambda$analyzeByVisitors$6(GeneralHighlightingPass.java:316)
at com.intellij.codeInsight.daemon.impl.analysis.XmlHighlightVisitor.analyze(XmlHighlightVisitor.java:597)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.analyzeByVisitors(GeneralHighlightingPass.java:316)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.lambda$analyzeByVisitors$6(GeneralHighlightingPass.java:316)
at com.intellij.codeInsight.daemon.impl.DefaultHighlightVisitor.analyze(DefaultHighlightVisitor.java:71)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.analyzeByVisitors(GeneralHighlightingPass.java:316)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.collectHighlights(GeneralHighlightingPass.java:283)
at com.intellij.codeInsight.daemon.impl.GeneralHighlightingPass.collectInformationWithProgress(GeneralHighlightingPass.java:227)
at com.intellij.codeInsight.daemon.impl.ProgressableTextEditorHighlightingPass.doCollectInformation(ProgressableTextEditorHighlightingPass.java:84)
at com.intellij.codeHighlighting.TextEditorHighlightingPass.collectInformation(TextEditorHighlightingPass.java:69)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$null$1(PassExecutorService.java:423)
at com.intellij.openapi.application.impl.ApplicationImpl.tryRunReadAction(ApplicationImpl.java:1171)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$doRun$2(PassExecutorService.java:416)
at com.intellij.openapi.progress.impl.CoreProgressManager.registerIndicatorAndRun(CoreProgressManager.java:582)
at com.intellij.openapi.progress.impl.CoreProgressManager.executeProcessUnderProgress(CoreProgressManager.java:532)
at com.intellij.openapi.progress.impl.ProgressManagerImpl.executeProcessUnderProgress(ProgressManagerImpl.java:87)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.doRun(PassExecutorService.java:415)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.lambda$run$0(PassExecutorService.java:391)
at com.intellij.openapi.application.impl.ReadMostlyRWLock.executeByImpatientReader(ReadMostlyRWLock.java:147)
at com.intellij.openapi.application.impl.ApplicationImpl.executeByImpatientReader(ApplicationImpl.java:222)
at com.intellij.codeInsight.daemon.impl.PassExecutorService$ScheduledPass.run(PassExecutorService.java:389)
at com.intellij.concurrency.JobLauncherImpl$VoidForkJoinTask$1.exec(JobLauncherImpl.java:161)
at java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:289)
at java.util.concurrent.ForkJoinPool$WorkQueue.runTask(ForkJoinPool.java:1056)
at java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1692)
at java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:157)

我们正在运行最新版本的导航组件 (2.0.0-rc2)，并且我已经尝试了所有常见的修复方法（使缓存无效和重新启动等）。我尝试在新项目中使用导航，它似乎可以正常工作而不会引发此错误。

我尝试从我们的项目中删除所有导航 XML，然后添加一个完全空白的 XML，但它仍然会引发错误。我深入研究了插件的源代码，似乎当插件最初为设计视图处理导航文件时会发生这种情况，如果将它扔给新的导航文件，这没有意义。

我目前不知道为什么会发生这种情况，任何想法都将不胜感激！

Answer 1

简短的回答：

我通过将扩展 androidx.navigation.Navigator 的匿名类移动到单独的类并添加具有唯一名称的注释 @Navigator.Name(String name) 来修复它。

如果您也遇到此问题，请检查您的项目或其依赖项中是否有任何继承 Navigator 类的类缺少 @Navigator.Name(String name) 注释或使用非唯一字符串作为 name 参数. fragment 和 activity 不能使用，因为它们已在 API 中使用。

更多信息：

在进一步研究 Android 支持插件源代码以了解发生了什么后，我设法解决了我们项目中的问题。

在 Android 支持插件中启动 IDE 功能时，它会遍历您的项目和任何依赖项，寻找任何继承 Navigator 类的类并为其提供标签，以便在 XML 文件和设计视图中对其进行管理.此标记基于注释@Navigator.Name(String name)。如果没有注释，则使用默认值。

这些标签必须是唯一的，因为它们被用作构建标签到导航器类型的不可变映射的键。在我们的项目中，我们有一个匿名类，它扩展了Navigator 类并且没有注释。

在导航组件源中还有一个匿名类扩展Navigator，特别是在NavDeepLinkBuilder 类中。由于标签只有一个默认值，因此任何其他继承 Navigator 且项目中不存在注释的类或其依赖项都会导致此问题。