我在 Windows 10 (1909) 版本上使用 Android Studio v 4.0。直到昨晚我的代码编辑器窗口刚刚消失，一切都运行良好。
我试过以下
- 重新启动并使缓存无效
- 检查更新
- 重置默认布局（shift+F12）[窗口->恢复默认布局]
- 尝试将文件拖动到中心打开（编辑器永远不会出现，但每个文件的面包屑更新选择或打开的屏幕截图如下
许多其他组件也受到影响，例如
- Logcat 什么都不显示
- 事件日志不显示
- Build & Sync 不显示任何内容
另一件奇怪的事情是我无法打开设置 [File -> Settings]（它什么也没显示）
这是我安装的 android studio 的 about 部分
idea.log1 包含此异常
2020-06-27 12:26:01,693 [5987243] ERROR - enapi.editor.impl.SettingsImpl - Error determining tab size
java.lang.NullPointerException
at com.intellij.openapi.editor.impl.SettingsImpl.getTabSize(SettingsImpl.java:377)
at com.intellij.openapi.editor.ex.util.EditorUtil.getTabSize(EditorUtil.java:342)
at com.intellij.openapi.editor.impl.view.EditorView.getTabSize(EditorView.java:547)
at com.intellij.openapi.editor.impl.view.LogicalPositionCache.reset(LogicalPositionCache.java:75)
at com.intellij.openapi.editor.impl.view.EditorView.reinitSettings(EditorView.java:344)
at com.intellij.openapi.editor.impl.EditorImpl.<init>(EditorImpl.java:501)
at com.intellij.openapi.editor.impl.EditorFactoryImpl.createEditor(EditorFactoryImpl.java:200)
at com.intellij.openapi.editor.impl.EditorFactoryImpl.createViewer(EditorFactoryImpl.java:170)
at com.intellij.execution.impl.ConsoleViewUtil.setupConsoleEditor(ConsoleViewUtil.java:56)
at com.android.tools.idea.welcome.wizard.deprecated.ProgressStep.<init>(ProgressStep.java:61)
at com.android.tools.idea.sdk.wizard.VmWizard$SetupProgressStep.<init>(VmWizard.java:132)
at com.android.tools.idea.sdk.wizard.VmWizard$VmPath.init(VmWizard.java:251)
at com.android.tools.idea.wizard.dynamic.DynamicWizardPath.attachToWizard(DynamicWizardPath.java:98)
at com.android.tools.idea.wizard.dynamic.DynamicWizard.addPath(DynamicWizard.java:233)
at com.android.tools.idea.sdk.wizard.VmWizard.<init>(VmWizard.java:68)
at com.android.tools.idea.sdk.install.VmInstallListener.lambda$statusChanged$0(VmInstallListener.java:58)
at com.intellij.openapi.application.impl.LaterInvocator$1.run(LaterInvocator.java:154)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.doRun(LaterInvocator.java:441)
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: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:908)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:781)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:424)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:698)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:423)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)
at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:190)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:235)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:233)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:233)
at java.awt.Dialog.show(Dialog.java:1077)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog.show(DialogWrapperPeerImpl.java:708)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:433)
at com.intellij.openapi.ui.DialogWrapper.doShow(DialogWrapper.java:1698)
at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1657)
at com.android.tools.idea.updater.UpdateInfoDialog$1.actionPerformed(UpdateInfoDialog.java:79)
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022)
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2348)
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402)
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259)
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252)
at java.awt.Component.processMouseEvent(Component.java:6550)
at javax.swing.JComponent.processMouseEvent(JComponent.java:3325)
at java.awt.Component.processEvent(Component.java:6315)
at java.awt.Container.processEvent(Container.java:2239)
at java.awt.Component.dispatchEventImpl(Component.java:4899)
at java.awt.Container.dispatchEventImpl(Container.java:2297)
at java.awt.Component.dispatchEvent(Component.java:4721)
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4904)
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4535)
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4476)
at java.awt.Container.dispatchEventImpl(Container.java:2283)
at java.awt.Window.dispatchEventImpl(Window.java:2746)
at java.awt.Component.dispatchEvent(Component.java:4721)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:766)
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.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:84)
at java.awt.EventQueue$4.run(EventQueue.java:739)
at java.awt.EventQueue$4.run(EventQueue.java:737)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:74)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:736)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:908)
at com.intellij.ide.IdeEventQueue.dispatchMouseEvent(IdeEventQueue.java:846)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:778)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:424)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:687)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:423)
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:205)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:116)
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:109)
at java.awt.WaitDispatchSupport$2.run(WaitDispatchSupport.java:190)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:235)
at java.awt.WaitDispatchSupport$4.run(WaitDispatchSupport.java:233)
at java.security.AccessController.doPrivileged(Native Method)
at java.awt.WaitDispatchSupport.enter(WaitDispatchSupport.java:233)
at java.awt.Dialog.show(Dialog.java:1077)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl$MyDialog.show(DialogWrapperPeerImpl.java:708)
at com.intellij.openapi.ui.impl.DialogWrapperPeerImpl.show(DialogWrapperPeerImpl.java:433)
at com.intellij.openapi.ui.DialogWrapper.doShow(DialogWrapper.java:1698)
at com.intellij.openapi.ui.DialogWrapper.show(DialogWrapper.java:1657)
at com.android.tools.idea.updater.SdkComponentSource.installUpdates(SdkComponentSource.java:108)
at com.intellij.openapi.updateSettings.impl.UpdateChecker$showUpdateResult$runnable$3.invoke(UpdateChecker.kt:427)
at com.intellij.openapi.updateSettings.impl.UpdateChecker$showUpdateResult$runnable$3.invoke(UpdateChecker.kt:55)
at com.intellij.openapi.updateSettings.impl.UpdateChecker.showUpdateResult(UpdateChecker.kt:430)
at com.intellij.openapi.updateSettings.impl.UpdateChecker.access$showUpdateResult(UpdateChecker.kt:55)
at com.intellij.openapi.updateSettings.impl.UpdateChecker$doUpdateAndShowResult$1.run(UpdateChecker.kt:157)
at com.intellij.openapi.application.TransactionGuardImpl$2.run(TransactionGuardImpl.java:309)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.doRun(LaterInvocator.java:441)
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: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:908)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:781)
at com.intellij.ide.IdeEventQueue.lambda$dispatchEvent$8(IdeEventQueue.java:424)
at com.intellij.openapi.progress.impl.CoreProgressManager.computePrioritized(CoreProgressManager.java:698)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:423)
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)
2020-06-27 12:26:01,696 [5987246] ERROR - enapi.editor.impl.SettingsImpl - Android Studio 4.0 Build #AI-193.6911.18.40.6514223
2020-06-27 12:26:01,696 [5987246] ERROR - enapi.editor.impl.SettingsImpl - JDK: 1.8.0_242-release; VM: OpenJDK 64-Bit Server VM; Vendor: JetBrains s.r.o
2020-06-27 12:26:01,696 [5987246] ERROR - enapi.editor.impl.SettingsImpl - OS: Windows 10