eclipse导入svn目录中的android项目预编译失败的问题

最近搭建android开发环境遇到一个很是狗血的问题，在eclipse中导入svn中项目时，预编译报错，查看workspace 内的日志文件，错误内容以下：

java.lang.NullPointerException
	at com.android.ide.eclipse.adt.internal.build.SourceProcessor.scanFolderForSourceFiles(SourceProcessor.java:374)
	at com.android.ide.eclipse.adt.internal.build.SourceProcessor.scanFolderForSourceFiles(SourceProcessor.java:380)
	at com.android.ide.eclipse.adt.internal.build.SourceProcessor.buildSourceFileList(SourceProcessor.java:353)
	at com.android.ide.eclipse.adt.internal.build.SourceProcessor.<init>(SourceProcessor.java:97)
	at com.android.ide.eclipse.adt.internal.build.SourceProcessor.<init>(SourceProcessor.java:113)
	at com.android.ide.eclipse.adt.internal.build.AidlProcessor.<init>(AidlProcessor.java:85)
	at com.android.ide.eclipse.adt.internal.build.builders.PreCompilerBuilder.startupOnInitialize(PreCompilerBuilder.java:800)
	at org.eclipse.core.internal.events.BuildManager.getBuilder(BuildManager.java:542)
	at org.eclipse.core.internal.events.BuildManager.getBuilder(BuildManager.java:567)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:237)
	at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:292)
	at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:42)
	at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:295)
	at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:351)
	at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:374)
	at org.eclipse.core.internal.events.AutoBuildJob.doBuild(AutoBuildJob.java:143)
	at org.eclipse.core.internal.events.AutoBuildJob.run(AutoBuildJob.java:241)
	at org.eclipse.core.internal.jobs.Worker.run(Worker.java:54)

 因此致使不可以自动生成资源代码。

以前怀疑是64位JDK或者eclipse的问题换成32位后结果仍是报错，最终将svn客户端从1.6 升级到1.7后解决了这个问题。 估计是1.6的svn与ADT不兼容致使的。。。