我安装了cocos2d-x版本3.2和eclipse juno 23.之后我配置eclipse进行cocos和c ++开发并构建项目。我关闭eclipse并再次打开它但是什么时候我的项目消失了，java null指针错误显示up。我的根项目存在，但是当我扩展它时，子项目文件夹中没有任何内容存在，并且该项目在硬盘驱动器上存在。
我做了什么修理：
这是日食环境的形象： http://speedy.sh/xu2h8/Untitled.png
这是日志：
eclipse.buildId=M20130204-1200
java.version=1.8.0_05
java.vendor=Oracle Corporation
BootLoader constants: OS=win32, ARCH=x86_64, WS=win32, NL=en_US
Framework arguments: -product com.android.ide.eclipse.adt.package.adtproduct
Command-line arguments: -os win32 -ws win32 -arch x86_64 -product com.android.ide.eclipse.adt.package.adtproduct
!ENTRY org.eclipse.core.resources 2 10035 2014-07-23 12:50:35.970
!MESSAGE The workspace exited with unsaved changes in the previous session; refreshing workspace to recover changes.
!ENTRY org.eclipse.egit.ui 2 0 2014-07-23 12:50:43.927
!MESSAGE Warning: EGit couldn't detect the installation path "gitPrefix" of native Git. Hence EGit can't respect system level
Git settings which might be configured in ${gitPrefix}/etc/gitconfig under the native Git installation directory.
The most important of these settings is core.autocrlf. Git for Windows by default sets this parameter to true in
this system level configuration. The Git installation location can be configured on the
Team > Git > Configuration preference page's 'System Settings' tab.
This warning can be switched off on the Team > Git > Confirmations and Warnings preference page.
!ENTRY org.eclipse.egit.ui 2 0 2014-07-23 12:50:43.931
!MESSAGE Warning: The environment variable HOME is not set. The following directory will be used to store the Git
user global configuration and to define the default location to store repositories: 'C:\Users\ABBAS-PC'. If this is
not correct please set the HOME environment variable and restart Eclipse. Otherwise Git for Windows and
EGit might behave differently since they see different configuration options.
This warning can be switched off on the Team > Git > Confirmations and Warnings preference page.
!ENTRY org.eclipse.core.resources 4 2 2014-07-23 12:50:47.858
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.core.resources".
!STACK 0
java.lang.NullPointerException
at org.eclipse.cdt.internal.core.settings.model.CConfigurationDescriptionCache.loadData(CConfigurationDescriptionCache.java:104)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescription.loadDatas(CProjectDescription.java:196)
at org.eclipse.cdt.internal.core.settings.model.xml.XmlProjectDescriptionStorage.loadProjectDescription(XmlProjectDescriptionStorage.java:486)
at org.eclipse.cdt.internal.core.settings.model.xml.XmlProjectDescriptionStorage.getProjectDescription(XmlProjectDescriptionStorage.java:231)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.getProjectDescriptionInternal(CProjectDescriptionManager.java:416)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.getProjectDescription(CProjectDescriptionManager.java:398)
at org.eclipse.cdt.managedbuilder.core.ManagedBuildManager.findBuildInfo(ManagedBuildManager.java:2709)
at org.eclipse.cdt.managedbuilder.core.ManagedBuildManager.getBuildInfo(ManagedBuildManager.java:2970)
at org.eclipse.cdt.managedbuilder.core.ManagedBuildManager.getBuildInfo(ManagedBuildManager.java:2925)
at org.eclipse.cdt.managedbuilder.core.ResourceChangeHandler2$Visitor.visit(ResourceChangeHandler2.java:122)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:69)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:80)
at org.eclipse.core.internal.events.ResourceDelta.accept(ResourceDelta.java:49)
at org.eclipse.cdt.managedbuilder.core.ResourceChangeHandler2.resourceChanged(ResourceChangeHandler2.java:179)
at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:291)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285)
at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:149)
at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:395)
at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1530)
at org.eclipse.core.internal.resources.Workspace.run(Workspace.java:2353)
at org.eclipse.jdt.internal.core.JavaModelOperation.runOperation(JavaModelOperation.java:793)
at org.eclipse.jdt.core.JavaCore.setClasspathContainer(JavaCore.java:5269)
at com.android.ide.eclipse.adt.internal.project.AndroidClasspathContainerInitializer.updateProjects(AndroidClasspathContainerInitializer.java:143)
at com.android.ide.eclipse.adt.internal.project.ProjectHelper.updateProjects(ProjectHelper.java:276)
at com.android.ide.eclipse.adt.AdtPlugin$7.run(AdtPlugin.java:1451)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
!ENTRY org.eclipse.cdt.core 4 0 2014-07-23 12:50:53.111
!MESSAGE Error
!STACK 0
java.lang.NullPointerException
at org.eclipse.cdt.internal.core.settings.model.CConfigurationDescriptionCache.loadData(CConfigurationDescriptionCache.java:104)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescription.loadDatas(CProjectDescription.java:196)
at org.eclipse.cdt.internal.core.settings.model.xml.XmlProjectDescriptionStorage.loadProjectDescription(XmlProjectDescriptionStorage.java:486)
at org.eclipse.cdt.internal.core.settings.model.xml.XmlProjectDescriptionStorage.getProjectDescription(XmlProjectDescriptionStorage.java:231)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.getProjectDescriptionInternal(CProjectDescriptionManager.java:416)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.getProjectDescription(CProjectDescriptionManager.java:398)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.getProjectDescription(CProjectDescriptionManager.java:393)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.getProjectDescription(CProjectDescriptionManager.java:386)
at org.eclipse.cdt.internal.core.model.CProject.computeSourceRoots(CProject.java:603)
at org.eclipse.cdt.internal.core.model.CProject.computeChildren(CProject.java:624)
at org.eclipse.cdt.internal.core.model.CProject.buildStructure(CProject.java:588)
at org.eclipse.cdt.internal.core.model.Openable.generateInfos(Openable.java:265)
at org.eclipse.cdt.internal.core.model.CElement.openWhenClosed(CElement.java:428)
at org.eclipse.cdt.internal.core.model.CElement.getElementInfo(CElement.java:307)
at org.eclipse.cdt.internal.core.model.CElement.getElementInfo(CElement.java:297)
at org.eclipse.cdt.internal.core.model.Parent.getChildren(Parent.java:55)
at org.eclipse.cdt.internal.core.model.CModelManager.create(CModelManager.java:280)
at org.eclipse.cdt.internal.core.model.CModelManager.create(CModelManager.java:257)
at org.eclipse.cdt.internal.core.model.DeltaProcessor.createElement(DeltaProcessor.java:88)
at org.eclipse.cdt.internal.core.model.DeltaProcessor.traverseDelta(DeltaProcessor.java:454)
at org.eclipse.cdt.internal.core.model.DeltaProcessor.traverseDelta(DeltaProcessor.java:472)
at org.eclipse.cdt.internal.core.model.DeltaProcessor.processResourceDelta(DeltaProcessor.java:434)
at org.eclipse.cdt.internal.core.model.CModelManager.resourceChanged(CModelManager.java:886)
at org.eclipse.core.internal.events.NotificationManager$1.run(NotificationManager.java:291)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.core.internal.events.NotificationManager.notify(NotificationManager.java:285)
at org.eclipse.core.internal.events.NotificationManager.broadcastChanges(NotificationManager.java:149)
at org.eclipse.core.internal.resources.Workspace.broadcastPostChange(Workspace.java:395)
at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1530)
at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:156)
at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
!ENTRY org.eclipse.ui.workbench 4 2 2014-07-23 12:55:03.534
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.ui.workbench".
!STACK 0
java.lang.NullPointerException
at org.eclipse.cdt.internal.core.settings.model.CConfigurationDescriptionCache.loadData(CConfigurationDescriptionCache.java:104)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescription.loadDatas(CProjectDescription.java:196)
at org.eclipse.cdt.internal.core.settings.model.xml.XmlProjectDescriptionStorage.loadProjectDescription(XmlProjectDescriptionStorage.java:486)
at org.eclipse.cdt.internal.core.settings.model.xml.XmlProjectDescriptionStorage.getProjectDescription(XmlProjectDescriptionStorage.java:231)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.getProjectDescriptionInternal(CProjectDescriptionManager.java:416)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.getProjectDescription(CProjectDescriptionManager.java:398)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.getProjectDescription(CProjectDescriptionManager.java:393)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.getProjectDescription(CProjectDescriptionManager.java:386)
at org.eclipse.cdt.internal.ui.viewsupport.ExcludedFileDecorator.decorate(ExcludedFileDecorator.java:40)
at org.eclipse.ui.internal.decorators.LightweightDecoratorDefinition.decorate(LightweightDecoratorDefinition.java:263)
at org.eclipse.ui.internal.decorators.LightweightDecoratorManager$LightweightRunnable.run(LightweightDecoratorManager.java:81)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.decorators.LightweightDecoratorManager.decorate(LightweightDecoratorManager.java:365)
at org.eclipse.ui.internal.decorators.LightweightDecoratorManager.getDecorations(LightweightDecoratorManager.java:347)
at org.eclipse.ui.internal.decorators.DecorationScheduler$1.ensureResultCached(DecorationScheduler.java:371)
at org.eclipse.ui.internal.decorators.DecorationScheduler$1.run(DecorationScheduler.java:331)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
!ENTRY org.eclipse.ui 4 4 2014-07-23 12:55:03.547
!MESSAGE Exception in Decorator. The 'C/C++ Files and Folders Excluded from Build' decorator will be disabled.
!ENTRY org.eclipse.ui 4 4 2014-07-23 12:55:03.550
!MESSAGE java.lang.NullPointerException
!STACK 0
java.lang.NullPointerException
at org.eclipse.cdt.internal.core.settings.model.CConfigurationDescriptionCache.loadData(CConfigurationDescriptionCache.java:104)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescription.loadDatas(CProjectDescription.java:196)
at org.eclipse.cdt.internal.core.settings.model.xml.XmlProjectDescriptionStorage.loadProjectDescription(XmlProjectDescriptionStorage.java:486)
at org.eclipse.cdt.internal.core.settings.model.xml.XmlProjectDescriptionStorage.getProjectDescription(XmlProjectDescriptionStorage.java:231)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.getProjectDescriptionInternal(CProjectDescriptionManager.java:416)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.getProjectDescription(CProjectDescriptionManager.java:398)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.getProjectDescription(CProjectDescriptionManager.java:393)
at org.eclipse.cdt.internal.core.settings.model.CProjectDescriptionManager.getProjectDescription(CProjectDescriptionManager.java:386)
at org.eclipse.cdt.internal.ui.viewsupport.ExcludedFileDecorator.decorate(ExcludedFileDecorator.java:40)
at org.eclipse.ui.internal.decorators.LightweightDecoratorDefinition.decorate(LightweightDecoratorDefinition.java:263)
at org.eclipse.ui.internal.decorators.LightweightDecoratorManager$LightweightRunnable.run(LightweightDecoratorManager.java:81)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.decorators.LightweightDecoratorManager.decorate(LightweightDecoratorManager.java:365)
at org.eclipse.ui.internal.decorators.LightweightDecoratorManager.getDecorations(LightweightDecoratorManager.java:347)
at org.eclipse.ui.internal.decorators.DecorationScheduler$1.ensureResultCached(DecorationScheduler.java:371)
at org.eclipse.ui.internal.decorators.DecorationScheduler$1.run(DecorationScheduler.java:331)
at org.eclipse.core.internal.jobs.Worker.run(Worker.java:53)
!ENTRY org.eclipse.ui 2 2 2014-07-23 13:02:27.459
!MESSAGE Invalid property category path: ValidationPropertiesPage (bundle: org.eclipse.wst.xml.ui, propertyPage: org.eclipse.wst.xml.ui.propertyPage.project.validation)
答案 0 :(得分：0)
我也遇到过这个错误， 可能的原因： -
当我尝试将Resources文件夹链接到我的Eclipse Project explorer时发生链接错误，当你将文件夹链接到你的项目时，proj.android文件夹中的.cproject文件被修改了。有两个＆lt; CConfiguration＆gt;此文件中的部分。在eclipse中编辑c ++ include路径时，只修改了其中一个路径。这种不一致导致cdt崩溃。
解决方案：
实际上应该只有一个＆lt; CConfiguration＆gt;，所以删除第二个，它从第85行开始。之后你可以在eclipse中编辑c ++ include路径，不会发生崩溃。
如果此练习不适用于您，请避免将文件夹链接到您的项目@所有费用。 希望这有助于你