eclipse导出Android项目时提示：An error has occurred. See error log for more details.

A295623449 2011-08-01 10:49:31
具体信息如下：
An error has occurred. See error log for more details.
java.lang.NullPointerException。

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compilerprin 2014-02-19
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如果代码没有问题，重启eclipse应该就可以了，
small菜鸟 2013-11-27
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大部分错误原因都是代码的错误，无非是空指针哪里为空，哪里没有实例化……不过不排除一部分eclipse自身的错误，对于eclipse本身的错误最好不要轻易添加或删除某些插件，重启是使其自我恢复的好办法很多时候都实用。
a1522609810 2012-07-10
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同样期待。
a1522609810 2012-07-10
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我这里的问题找到了，通过重装eclipse来测试，不断重转，终于是得出了结果，原来在安装WTP插件的时候，插件包当中有文件夹和eclipse原来的是冲突的，只要把这些冲突的全部选否就ok了。
具体解决方案是这样的，把干净的eclipse解压开，然后把WTP解压开，挑选里边的features文件夹和plugins文件夹出来，复制到eclipse根目录，对原来的那两个同名文件夹进行覆盖，在windows弹出来的消息框提示已经存在xxx文件夹是否覆盖其中的内容，选择全部，当里边再有问价夹名相同时，会弹出来同样的对话框，提示是否进行覆盖，这时候选择否即可。由于内部文件夹同名的非常多，得鼠标点好多下“否”，简便方法是按住键盘上的快捷键“N”——即NO的意思，这样2秒钟就搞定了，再打开eclipse就不会有这样离奇古怪的报错了。
wanqieddy521 2012-05-09
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还有人回答吗？我也遇到这样的问题了。
A295623449 2011-08-13
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[Quote=引用 11 楼 wjqwei 的回复:]

重新搜了搜
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.jface".
从插件调用代码时出现了问题： "org.eclipse.jface".
不知道是不是org.eclipse.jface"插件没有的原因，期待知道的人解答
[/Quote]
我看了，我的eclipse有jface。
eclipse刚开始时可以的，不知道怎么回事就出现了这个问题。
sciolist 2011-08-12
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eclipse 挂了吧～
wjqwei 2011-08-12
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[Quote=引用 5 楼 ch_984326013 的回复:]

这个问题就是空指针出错啊！你查看下，那个对象没实例化！或哪里为空之类的！debug!
[/Quote]
如上，从你的log中找出报空指针异常的地方，看那儿哪个对象为空或者没有实例化
A295623449 2011-08-12
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[Quote=引用 6 楼 redoffice 的回复:]

空指针异常。。debug吧。
[/Quote]

不知道怎么debug这个问题。
请教方法。
wjqwei 2011-08-12
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也有可能是版本的问题。。。顶顶。。。期待解答
wjqwei 2011-08-12
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重新搜了搜
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.jface".
从插件调用代码时出现了问题： "org.eclipse.jface".
不知道是不是org.eclipse.jface"插件没有的原因，期待知道的人解答
A295623449 2011-08-12
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[Quote=引用 8 楼 wjqwei 的回复:]

引用 5 楼 ch_984326013 的回复:

这个问题就是空指针出错啊！你查看下，那个对象没实例化！或哪里为空之类的！debug!

如上，从你的log中找出报空指针异常的地方，看那儿哪个对象为空或者没有实例化
[/Quote]

我贴的这个log中没有我写的类，我暂时不知道怎么找了。
如果你知道，麻烦你帮我找出来吧，这个问题已经放了一段时间了。。。
redoffice 2011-08-05
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空指针异常。。debug吧。
ch_984326013 2011-08-04
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这个问题就是空指针出错啊！你查看下，那个对象没实例化！或哪里为空之类的！debug!
A16165938 2011-08-04
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换种方式吧，项目上点右键-->copy，再在某处paste，得到的效果和Export-->File System 是一致的。
A295623449 2011-08-01
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error log 中的信息如下：

!ENTRY org.eclipse.jface 4 2 2011-08-01 03:35:59.781
!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.jface".
!STACK 0
java.lang.NullPointerException
at org.eclipse.ui.internal.wizards.datatransfer.WizardFileSystemResourceExportPage1.getConflictingContainerNameFor(WizardFileSystemResourceExportPage1.java:494)
at org.eclipse.ui.internal.wizards.datatransfer.WizardFileSystemResourceExportPage1.validateDestinationGroup(WizardFileSystemResourceExportPage1.java:432)
at org.eclipse.ui.dialogs.WizardDataTransferPage.determinePageCompletion(WizardDataTransferPage.java:180)
at org.eclipse.ui.dialogs.WizardExportResourcesPage.updateWidgetEnablements(WizardExportResourcesPage.java:632)
at org.eclipse.ui.dialogs.WizardExportResourcesPage.createControl(WizardExportResourcesPage.java:249)
at org.eclipse.ui.internal.wizards.datatransfer.WizardFileSystemResourceExportPage1.createControl(WizardFileSystemResourceExportPage1.java:107)
at org.eclipse.jface.wizard.Wizard.createPageControls(Wizard.java:170)
at org.eclipse.jface.wizard.WizardDialog.createPageControls(WizardDialog.java:734)
at org.eclipse.jface.wizard.WizardDialog.setWizard(WizardDialog.java:1162)
at org.eclipse.jface.wizard.WizardDialog.updateForPage(WizardDialog.java:1221)
at org.eclipse.jface.wizard.WizardDialog.access$4(WizardDialog.java:1218)
at org.eclipse.jface.wizard.WizardDialog$6.run(WizardDialog.java:1207)
at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)
at org.eclipse.jface.wizard.WizardDialog.showPage(WizardDialog.java:1205)
at org.eclipse.ui.internal.dialogs.ImportExportPage.treeDoubleClicked(ImportExportPage.java:234)
at org.eclipse.ui.internal.dialogs.ExportPage$2.doubleClick(ExportPage.java:71)
at org.eclipse.jface.viewers.StructuredViewer$1.run(StructuredViewer.java:824)
at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)
at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)
at org.eclipse.jface.viewers.StructuredViewer.fireDoubleClick(StructuredViewer.java:822)
at org.eclipse.jface.viewers.AbstractTreeViewer.handleDoubleSelect(AbstractTreeViewer.java:1421)
at org.eclipse.jface.viewers.StructuredViewer$4.widgetDefaultSelected(StructuredViewer.java:1225)
at org.eclipse.jface.util.OpenStrategy.fireDefaultSelectionEvent(OpenStrategy.java:238)
at org.eclipse.jface.util.OpenStrategy.access$0(OpenStrategy.java:235)
at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:296)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)
at org.eclipse.jface.window.Window.open(Window.java:801)
at org.eclipse.ui.internal.handlers.WizardHandler$Export.executeHandler(WizardHandler.java:98)
at org.eclipse.ui.internal.handlers.WizardHandler.execute(WizardHandler.java:274)
at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:293)
at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)
at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)
at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)
at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:241)
at org.eclipse.ui.internal.actions.CommandAction.runWithEvent(CommandAction.java:157)
at org.eclipse.ui.internal.actions.CommandAction.run(CommandAction.java:171)
at org.eclipse.ui.actions.ExportResourcesAction.run(ExportResourcesAction.java:116)
at org.eclipse.ui.actions.BaseSelectionListenerAction.runWithEvent(BaseSelectionListenerAction.java:168)
at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)
at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)
at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)
at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)
at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)
at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4066)
at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)
at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)
at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)
at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)
at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)
at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)
at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)
at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)
at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)
at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)
at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)
at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
at java.lang.reflect.Method.invoke(Unknown Source)
at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620)
at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)
at org.eclipse.equinox.launcher.Main.run(Main.java:1408)
A295623449 2011-08-01
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顶一下。
A295623449 2011-08-01
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error log 中的信息如下：




!ENTRY org.eclipse.jface 4 2 2011-08-01 03:35:59.781

!MESSAGE Problems occurred when invoking code from plug-in: "org.eclipse.jface".

!STACK 0

java.lang.NullPointerException

at org.eclipse.ui.internal.wizards.datatransfer.WizardFileSystemResourceExportPage1.getConflictingContainerNameFor(WizardFileSystemResourceExportPage1.java:494)

at org.eclipse.ui.internal.wizards.datatransfer.WizardFileSystemResourceExportPage1.validateDestinationGroup(WizardFileSystemResourceExportPage1.java:432)

at org.eclipse.ui.dialogs.WizardDataTransferPage.determinePageCompletion(WizardDataTransferPage.java:180)

at org.eclipse.ui.dialogs.WizardExportResourcesPage.updateWidgetEnablements(WizardExportResourcesPage.java:632)

at org.eclipse.ui.dialogs.WizardExportResourcesPage.createControl(WizardExportResourcesPage.java:249)

at org.eclipse.ui.internal.wizards.datatransfer.WizardFileSystemResourceExportPage1.createControl(WizardFileSystemResourceExportPage1.java:107)

at org.eclipse.jface.wizard.Wizard.createPageControls(Wizard.java:170)

at org.eclipse.jface.wizard.WizardDialog.createPageControls(WizardDialog.java:734)

at org.eclipse.jface.wizard.WizardDialog.setWizard(WizardDialog.java:1162)

at org.eclipse.jface.wizard.WizardDialog.updateForPage(WizardDialog.java:1221)

at org.eclipse.jface.wizard.WizardDialog.access$4(WizardDialog.java:1218)

at org.eclipse.jface.wizard.WizardDialog$6.run(WizardDialog.java:1207)

at org.eclipse.swt.custom.BusyIndicator.showWhile(BusyIndicator.java:70)

at org.eclipse.jface.wizard.WizardDialog.showPage(WizardDialog.java:1205)

at org.eclipse.ui.internal.dialogs.ImportExportPage.treeDoubleClicked(ImportExportPage.java:234)

at org.eclipse.ui.internal.dialogs.ExportPage$2.doubleClick(ExportPage.java:71)

at org.eclipse.jface.viewers.StructuredViewer$1.run(StructuredViewer.java:824)

at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)

at org.eclipse.ui.internal.JFaceUtil$1.run(JFaceUtil.java:49)

at org.eclipse.jface.util.SafeRunnable.run(SafeRunnable.java:175)

at org.eclipse.jface.viewers.StructuredViewer.fireDoubleClick(StructuredViewer.java:822)

at org.eclipse.jface.viewers.AbstractTreeViewer.handleDoubleSelect(AbstractTreeViewer.java:1421)

at org.eclipse.jface.viewers.StructuredViewer$4.widgetDefaultSelected(StructuredViewer.java:1225)

at org.eclipse.jface.util.OpenStrategy.fireDefaultSelectionEvent(OpenStrategy.java:238)

at org.eclipse.jface.util.OpenStrategy.access$0(OpenStrategy.java:235)

at org.eclipse.jface.util.OpenStrategy$1.handleEvent(OpenStrategy.java:296)

at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)

at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)

at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4066)

at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)

at org.eclipse.jface.window.Window.runEventLoop(Window.java:825)

at org.eclipse.jface.window.Window.open(Window.java:801)

at org.eclipse.ui.internal.handlers.WizardHandler$Export.executeHandler(WizardHandler.java:98)

at org.eclipse.ui.internal.handlers.WizardHandler.execute(WizardHandler.java:274)

at org.eclipse.ui.internal.handlers.HandlerProxy.execute(HandlerProxy.java:293)

at org.eclipse.core.commands.Command.executeWithChecks(Command.java:476)

at org.eclipse.core.commands.ParameterizedCommand.executeWithChecks(ParameterizedCommand.java:508)

at org.eclipse.ui.internal.handlers.HandlerService.executeCommand(HandlerService.java:169)

at org.eclipse.ui.internal.handlers.SlaveHandlerService.executeCommand(SlaveHandlerService.java:241)

at org.eclipse.ui.internal.actions.CommandAction.runWithEvent(CommandAction.java:157)

at org.eclipse.ui.internal.actions.CommandAction.run(CommandAction.java:171)

at org.eclipse.ui.actions.ExportResourcesAction.run(ExportResourcesAction.java:116)

at org.eclipse.ui.actions.BaseSelectionListenerAction.runWithEvent(BaseSelectionListenerAction.java:168)

at org.eclipse.jface.action.ActionContributionItem.handleWidgetSelection(ActionContributionItem.java:584)

at org.eclipse.jface.action.ActionContributionItem.access$2(ActionContributionItem.java:501)

at org.eclipse.jface.action.ActionContributionItem$5.handleEvent(ActionContributionItem.java:411)

at org.eclipse.swt.widgets.EventTable.sendEvent(EventTable.java:84)

at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1053)

at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:4066)

at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3657)

at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2640)

at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2604)

at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2438)

at org.eclipse.ui.internal.Workbench$7.run(Workbench.java:671)

at org.eclipse.core.databinding.observable.Realm.runWithDefault(Realm.java:332)

at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:664)

at org.eclipse.ui.PlatformUI.createAndRunWorkbench(PlatformUI.java:149)

at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:115)

at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:196)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.runApplication(EclipseAppLauncher.java:110)

at org.eclipse.core.runtime.internal.adaptor.EclipseAppLauncher.start(EclipseAppLauncher.java:79)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:369)

at org.eclipse.core.runtime.adaptor.EclipseStarter.run(EclipseStarter.java:179)

at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)

at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)

at java.lang.reflect.Method.invoke(Unknown Source)

at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:620)

at org.eclipse.equinox.launcher.Main.basicRun(Main.java:575)

at org.eclipse.equinox.launcher.Main.run(Main.java:1408)
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