android+eclipse 的一个errorlog的Internal Error 有关问题《转载》

今天莫名其妙的Android项目 在eclipse下就报错了，报错类型为： 

ErrorLog中显示： 

Internal Error 

Java Model Exception: Java Model Status [gen [in HelloAndroid] does not exist] 

Problems中显示： 

Description    Resource    Path    Location    Type 
Project 'HelloAndroid' is missing required source folder: 'gen'    HelloAndroid        Build path    Build Path Problem 

clean projected也不行，还是报错，但是gen和R.java都是存在的，这个可能是adt的bug。 

后来折腾了半天解决了  解决办法为： 

1.在eclipse中删除gen文件夹 Delete the R.java file under the gen folder (用这个就行)

2.刷新项目，此时一般情况选择了自动编译的会自动生成gen的 现在出问题了没有自动生成 Refresh the project 

3.选择project-build project 编译项目就可以了 最好将project –auto building 勾选上。Build Project, not Clean 

出现问题还可能采用的解决办法有 

检查java compiler中使用的jdk 可以更换下试试 先跟换为1.5，编译一遍然后更换回1.6试试 

检查Android Sdk 模拟器版本 重新设置试试看， 



详细错误内容： 

eclipse.buildId=I20090611-1540 
java.version=1.6.0_07 
java.vendor=Sun Microsystems Inc. 
BootLoader constants: OS=win32, ARCH=x86, WS=win32, NL=zh_CN 
Framework arguments:  -product org.eclipse.epp.package.jee.product -product org.eclipse.epp.package.jee.product 
Command-line arguments:  -os win32 -ws win32 -arch x86 -product org.eclipse.epp.package.jee.product -data D:\ByreadSourse -product org.eclipse.epp.package.jee.product 

Error 
Sat Jun 26 13:21:23 CST 2010 
Internal Error 

Java Model Exception: Java Model Status [gen [in HelloAndroid] does not exist] 
    at org.eclipse.jdt.internal.core.JavaElement.newJavaModelException(JavaElement.java:502) 
    at org.eclipse.jdt.internal.core.Openable.generateInfos(Openable.java:246) 
    at org.eclipse.jdt.internal.core.JavaElement.openWhenClosed(JavaElement.java:515) 
    at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:252) 
    at org.eclipse.jdt.internal.core.JavaElement.getElementInfo(JavaElement.java:238) 
    at org.eclipse.jdt.internal.core.PackageFragmentRoot.getKind(PackageFragmentRoot.java:477) 
    at org.eclipse.jdt.internal.ui.packageview.PackageExplorerContentProvider.processDelta(PackageExplorerContentProvider.java:645)
    at org.eclipse.jdt.internal.ui.packageview.PackageExplorerContentProvider.handleAffectedChildren(PackageExplorerContentProvider.java:791)
    at org.eclipse.jdt.internal.ui.packageview.PackageExplorerContentProvider.processDelta(PackageExplorerContentProvider.java:734)
    at org.eclipse.jdt.internal.ui.packageview.PackageExplorerContentProvider.handleAffectedChildren(PackageExplorerContentProvider.java:791)
    at org.eclipse.jdt.internal.ui.packageview.PackageExplorerContentProvider.processDelta(PackageExplorerContentProvider.java:734)
    at org.eclipse.jdt.internal.ui.packageview.PackageExplorerContentProvider.elementChanged(PackageExplorerContentProvider.java:124)
    at org.eclipse.jdt.internal.core.DeltaProcessor$3.run(DeltaProcessor.java:1557) 
    at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42) 
    at org.eclipse.jdt.internal.core.DeltaProcessor.notifyListeners(DeltaProcessor.java:1547) 
    at org.eclipse.jdt.internal.core.DeltaProcessor.firePostChangeDelta(DeltaProcessor.java:1381) 
    at org.eclipse.jdt.internal.core.DeltaProcessor.fire(DeltaProcessor.java:1357) 
    at org.eclipse.jdt.internal.core.DeltaProcessor.resourceChanged(DeltaProcessor.java:1958) 
    at org.eclipse.jdt.internal.core.DeltaProcessingState.resourceChanged(DeltaProcessingState.java:470) 
    at org.eclipse.core.internal.events.NotificationManager$2.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:313) 
    at org.eclipse.core.internal.resources.Workspace.endOperation(Workspace.java:1022) 
    at org.eclipse.core.internal.resources.InternalWorkspaceJob.run(InternalWorkspaceJob.java:45) 
    at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55