单击“运行”和“调试”按钮会在Android中引发NullPointerException

Question

我无法运行我的任何项目，因为点击run或debug按钮(或按下各自的快捷键)将引发以下NPE，并要求我向谷歌报告。

这个错误发生在Android中，而不是我的代码上；不需要一个示例代码来复制，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

我只是注意到Java没有在我的机器上运行。这就是问题的根源。

我有一个Macbook专业版，当我运行Android时，Java的图标将被添加到对接程序中。我不知道这次为什么不自动启动，很奇怪。因此，我不得不按下同步项目(尽管该项目已经同步)，只是为了强制Java运行！然后，通常的图标被添加到码头和一切正常工作！

Answer 2

也有类似的问题，但这是因为我在试图在物理设备上调试时，将构建变体设置为“release”。切换到“调试”，一切又开始顺利运行。