单击运行和调试按钮会在 Android Studio 中引发 NullPointerException

Question

我无法运行我的任何项目，因为单击 run 或 debug 按钮（或按下它们各自的快捷键）会引发以下 NPE 并要求我将其报告给 google。

这个错误发生在 Android Studio 内部，而不是我的代码；无需复制示例代码，因为它可以发生在任何项目中。

java.lang.NullPointerException
at com.intellij.openapi.vfs.impl.local.LocalFileSystemBase.findFileByIoFile(LocalFileSystemBase.java:79)
at com.intellij.openapi.vfs.VfsUtil.findFileByIoFile(VfsUtil.java:232)
at com.android.tools.idea.model.ManifestInfo$ManifestFile.getLibManifests(ManifestInfo.java:406)
at com.android.tools.idea.model.ManifestInfo$ManifestFile.refresh(ManifestInfo.java:339)
at com.android.tools.idea.model.MergedManifest.syncWithReadPermission(MergedManifest.java:377)
at com.android.tools.idea.model.MergedManifest$2.run(MergedManifest.java:356)
at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:843)
at com.android.tools.idea.model.MergedManifest.sync(MergedManifest.java:353)
at com.android.tools.idea.model.MergedManifest.getActivities(MergedManifest.java:510)
at com.android.tools.idea.run.activity.DefaultActivityLocator.lambda$computeDefaultActivity$0(DefaultActivityLocator.java:79)
at com.intellij.openapi.project.DumbService$1.run(DumbService.java:89)
at com.intellij.openapi.project.DumbService$2.compute(DumbService.java:125)
at com.intellij.openapi.project.DumbService$2.compute(DumbService.java:119)
at com.intellij.openapi.application.impl.ApplicationImpl.runReadAction(ApplicationImpl.java:859)
at com.intellij.openapi.project.DumbService.runReadActionInSmartMode(DumbService.java:119)
at com.intellij.openapi.project.DumbService.runReadActionInSmartMode(DumbService.java:86)
at com.android.tools.idea.run.activity.DefaultActivityLocator.computeDefaultActivity(DefaultActivityLocator.java:78)
at com.android.tools.idea.run.activity.DefaultActivityLocator.validate(DefaultActivityLocator.java:65)
at com.android.tools.idea.run.editor.DefaultActivityLaunch$State.checkConfiguration(DefaultActivityLaunch.java:49)
at com.android.tools.idea.run.AndroidRunConfiguration.checkConfiguration(AndroidRunConfiguration.java:108)
at com.android.tools.idea.run.AndroidRunConfigurationBase.validate(AndroidRunConfigurationBase.java:175)
at com.android.tools.idea.run.AndroidRunConfigurationBase.checkConfiguration(AndroidRunConfigurationBase.java:113)
at com.intellij.execution.impl.RunnerAndConfigurationSettingsImpl.checkSettings(RunnerAndConfigurationSettingsImpl.java:423)
at com.intellij.execution.impl.RunManagerImpl.canRunConfiguration(RunManagerImpl.java:535)
at com.intellij.execution.impl.RunManagerImpl.canRunConfiguration(RunManagerImpl.java:530)
at com.intellij.execution.ProgramRunnerUtil.executeConfiguration(ProgramRunnerUtil.java:71)
at com.intellij.execution.impl.ExecutionManagerImpl.start(ExecutionManagerImpl.java:117)
at com.intellij.execution.impl.ExecutionManagerImpl.access$300(ExecutionManagerImpl.java:67)
at com.intellij.execution.impl.ExecutionManagerImpl$3.run(ExecutionManagerImpl.java:509)
at com.intellij.util.concurrency.QueueProcessor.runSafely(QueueProcessor.java:222)
at com.intellij.util.Alarm$Request$1.run(Alarm.java:378)
at com.intellij.openapi.application.TransactionGuardImpl$6.run(TransactionGuardImpl.java:291)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.runNextEvent(LaterInvocator.java:326)
at com.intellij.openapi.application.impl.LaterInvocator$FlushQueue.run(LaterInvocator.java:310)
at java.awt.event.InvocationEvent.dispatch(InvocationEvent.java:311)
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:756)
at java.awt.EventQueue.access$500(EventQueue.java:97)
at java.awt.EventQueue$3.run(EventQueue.java:709)
at java.awt.EventQueue$3.run(EventQueue.java:703)
at java.security.AccessController.doPrivileged(Native Method)
at java.security.ProtectionDomain$JavaSecurityAccessImpl.doIntersectionPrivilege(ProtectionDomain.java:80)
at java.awt.EventQueue.dispatchEvent(EventQueue.java:726)
at com.intellij.ide.IdeEventQueue.defaultDispatchEvent(IdeEventQueue.java:795)
at com.intellij.ide.IdeEventQueue._dispatchEvent(IdeEventQueue.java:631)
at com.intellij.ide.IdeEventQueue.dispatchEvent(IdeEventQueue.java:387)
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)

Answer 1

我刚刚注意到我的机器上没有运行 Java。这就是问题的根源。

我有一个 Macbook pro，当我运行 Android Studio 时，Java 的图标将被添加到 docker。不知道为什么这次没有自动启动，很奇怪。因此，我不得不按下同步项目（尽管项目已经同步）只是为了强制 Java 运行！然后，通常的图标被添加到 docker 并且一切正常！

Answer 2

有类似的问题，但这是因为我在尝试在物理设备上调试时将构建变体设置为“发布”。切换到“debug”，一切又开始顺利运行了。