关于eclipse中adt插件不能启动的问题的解决办法

配置了android sdk和adt插件以后，点击eclipse 上的新建android工程的小图标，未能弹出新建android工程向导，而是报错：

!MESSAGE Unhandled event loop exception

!STACK 0

java.lang.NullPointerException

at com.android.ide.eclipse.adt.internal.wizards.newproject.NewProjectCreationPage.findSamplesManifests(Unknown Source)

at com.android.ide.eclipse.adt.internal.wizards.newproject.NewProjectCreationPage.findSamplesManifests(Unknown Source)

at com.android.ide.eclipse.adt.internal.wizards.newproject.NewProjectCreationPage.findSamplesManifests(Unknown Source)

at com.android.ide.eclipse.adt.internal.wizards.newproject.NewProjectCreationPage.findSamplesManifests(Unknown Source)

at com.android.ide.eclipse.adt.internal.wizards.newproject.NewProjectCreationPage.loadSamplesForTarget(Unknown Source)

at com.android.ide.eclipse.adt.internal.wizards.newproject.NewProjectCreationPage.onSdkTargetModified(Unknown Source)

at com.android.ide.eclipse.adt.internal.wizards.newproject.NewProjectCreationPage.access$21(Unknown Source)

at com.android.ide.eclipse.adt.internal.wizards.newproject.NewProjectCreationPage$7.widgetSelected(Unknown Source)

at com.android.sdkuilib.internal.widgets.SdkTargetSelector.setSelection(SdkTargetSelector.java:208)

at com.android.ide.eclipse.adt.internal.wizards.newproject.NewProjectCreationPage$8.onSdkLoaded(Unknown Source)

at com.android.ide.eclipse.adt.internal.wizards.newproject.NewProjectCreationPage.createControl(Unknown Source)

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

at org.eclipse.jface.wizard.WizardDialog.createPageControls(WizardDialog.java:675)

at org.eclipse.jface.wizard.WizardDialog.createContents(WizardDialog.java:549)

at org.eclipse.jface.window.Window.create(Window.java:431)

at org.eclipse.jface.dialogs.Dialog.create(Dialog.java:1089)

at com.android.ide.eclipse.adt.internal.wizards.actions.OpenWizardAction.run(Unknown Source)

at org.eclipse.ui.internal.PluginAction.runWithEvent(PluginAction.java:251)

at org.eclipse.ui.internal.WWinPluginAction.runWithEvent(WWinPluginAction.java:229)

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$6.handleEvent(ActionContributionItem.java:452)

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

at org.eclipse.swt.widgets.Widget.sendEvent(Widget.java:1176)

at org.eclipse.swt.widgets.Display.runDeferredEvents(Display.java:3493)

at org.eclipse.swt.widgets.Display.readAndDispatch(Display.java:3112)

at org.eclipse.ui.internal.Workbench.runEventLoop(Workbench.java:2405)

at org.eclipse.ui.internal.Workbench.runUI(Workbench.java:2369)

at org.eclipse.ui.internal.Workbench.access$4(Workbench.java:2221)

at org.eclipse.ui.internal.Workbench$5.run(Workbench.java:500)

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

at org.eclipse.ui.internal.Workbench.createAndRunWorkbench(Workbench.java:493)

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

at org.eclipse.ui.internal.ide.application.IDEApplication.start(IDEApplication.java:113)

at org.eclipse.equinox.internal.app.EclipseAppHandle.run(EclipseAppHandle.java:194)

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:368)

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

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

at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)

at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)

at java.lang.reflect.Method.invoke(Method.java:585)

at org.eclipse.equinox.launcher.Main.invokeFramework(Main.java:559)

at org.eclipse.equinox.launcher.Main.basicRun(Main.java:514)

at org.eclipse.equinox.launcher.Main.run(Main.java:1311)

试了很多种办法都不管用，重装了eclipse、adt都没有作用。最后在android官方下载了最新的sdk重新配置重启eclipse就好了。插件adt没有重装还是以前的。