无法在Android Studio中查看菜单xml，在插件Android支持中获取异常

Question

每当我打开下面提到的xml布局时，Android studio会在插件Android支持中显示有关Exception的错误消息。

我得到的错误

null
java.lang.NullPointerException
    at com.android.tools.idea.uibuilder.scene.LayoutlibSceneManager.getRenderResult(LayoutlibSceneManager.java:602)
    at com.android.tools.idea.uibuilder.surface.ScreenViewBase.getResult(ScreenViewBase.java:109)
    at com.android.tools.idea.uibuilder.surface.ScreenView.getResult(ScreenView.java:30)
    at com.android.tools.idea.uibuilder.menu.NavigationViewSceneView.getPreferredSize(NavigationViewSceneView.java:64)
    at com.android.tools.idea.common.surface.SceneView.getPreferredSize(SceneView.java:95)
    at com.android.tools.idea.uibuilder.scene.LayoutlibSceneManager.createSceneViewsForMenu(LayoutlibSceneManager.java:265)
    at com.android.tools.idea.uibuilder.scene.LayoutlibSceneManager.doCreateSceneView(LayoutlibSceneManager.java:234)
    at com.android.tools.idea.common.scene.SceneManager.createSceneView(SceneManager.java:73)
    at com.android.tools.idea.common.scene.SceneManager.<init>(SceneManager.java:66)
    at com.android.tools.idea.uibuilder.scene.LayoutlibSceneManager.<init>(LayoutlibSceneManager.java:157)
    at com.android.tools.idea.uibuilder.surface.NlDesignSurface.createSceneManager(NlDesignSurface.java:145)
    at com.android.tools.idea.common.surface.DesignSurface.setModel(DesignSurface.java:281)
    at com.android.tools.idea.common.editor.NlEditorPanel.initNeleModelOnEventDispatchThread(NlEditorPanel.java:143)
    at com.android.tools.idea.common.editor.NlEditorPanel.lambda$null$4(NlEditorPanel.java:139)
    at com.intellij.openapi.project.DumbServiceImpl.lambda$smartInvokeLater$7(DumbServiceImpl.java:366)
    at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:315)
    at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:424)
    at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:407)
    at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
    at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:762)
    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:80)
    at java.awt.EventQueue.dispatchEvent(EventQueue.java:732)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:822)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:650)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:366)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:201)
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)

删除了该行

tools:showIn="navigation_view"

现在能够预览，但没有在设计选项卡上显示

Answer 1

 tools:showIn="navigation_view"  //delete this line

这会导致布局预览崩溃。

尝试重建项目或关闭项目并重新启动android studio。

或者先成功打开另一个xml，然后再次打开卡住的xml。