archive for required library could not be read or is not a valid ZIP file

Question

Before coming to the problem let me explain what I did that has landed me in the problem.

1. I created an account on github and made a repository named Android.

Answer 1

Looks like everyone has different story to tell! For me, I had to delete the error from eclipse Markers tab, and then cleaned the project again. Before that, I closed and re-opened the project/eclipse several times as suggested by @rachit, which did not work for me.