gen already exists but is not a source folder. Convert to a source folder or rename it

android,eclipse,error,gen
2015-03-06 10:09:46

最近android项目老是弹出这个错误，很烦人。有时候把gen目录删除了，让eclipse重新生成一个就好了。不过有时候好好的，这个目录突然不出现在配置的源目录里了，很郁闷，不知道是什么原因造成的。

[ERROR]gen already exists but is not a source folder. Convert to a source folder or rename it

This is a common error and you can solve it following these steps:

Right click on the project and go to “Properties”
Select “Java Build Path” on the left
Open “Source” tab
Click “Add Folder…”
Check “gen” folder and click Ok and Ok again
Again right click on the project and in the “Andriod Tools” click on “Fix Project Properties”

- EOF -

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gen already exists but is not a source folder. Convert to a source folder or rename it

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