Can't add library project to my app project?

Can't add library project to my app project?

References

Reference NO 1

http://stackoverflow.com/questions/15196772/cant-add-library-project-to-my-app-project

Reference NO 2

http://stackoverflow.com/questions/4114838/cannot-reference-lvl-android-library-in-my-app-project

Reference NO 3

http://stackoverflow.com/questions/15018977/cannot-add-library-to-android-project-in-eclipse

Reference NO 4

http://stackoverflow.com/questions/9979098/want-to-add-facebook-library-in-my-project

Reference NO 5

http://stackoverflow.com/questions/14003361/how-to-add-library-of-actionbarsherlock-to-project

Reference NO 6

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Reference NO 7

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Reference NO 8

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