Android编译报Errors running builder 'Android Pre Compiler' on project 'XXX' java.lang.NullPointerException

编译android时，遇到报错：
Errors occurred during the build.Errors running builder 'Android Pre Compiler' on project 'XXX'
java.lang.NullPointerException

错误原因：
工程目录下有很多.svn目录

解决方法：

1. Open properties of project in Eclipse then Resources -> Resource filters.
2. Click the "Add..." button -> Check "Exclude all", "Files and folders", "All children". In the text entry box input ".svn" (without quotes).
3. Restart Eclipse.