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

I will say that it can be that some answers work for some cases, but for me it was necessary to go an extra mile. So I will try to make a summary of what can be done:

1. Verify that the jars are intact:

   jar tf myjar.jar

2. Restart eclipse and update projects setting over right click on project -> Maven -> Update project

3. The option which has work for me was to navigate in the workspace folder and then delete the files:

   .metadata/.plugins/org.eclipse.jdt.core/invalidArchivesCache .metadata/.plugins/org.eclipse.jdt.core/nonChainingJarsCache

After that restart eclipse and rebuild project.