An issue encountered with Android Pulltorefresh reference

Today when using the Pulltorefresh plugin encountered a headache, import the library project to use in Eclipse, and then create a new project into the library, showing the introduction of success,

And the Project.Properties file also shows the introduction, but when you import a package in a project to reference a library project, you'll find that you can't find the package. And then open the introduction of the Project window, you will find the above picture of the small green tick will become a red X, this problem is very tangled ah, Baidu, ask the big God big recruit ah, what clean, restart all useless, the last friend said a sentence they in the same work space ? Finally, the problem is solved, put the Android-pulltorefresh-master package in your project workspace can be, I do not know why this, know the great God, please inform, thank you

An issue encountered with Android Pulltorefresh reference