Classnotfoundexception When Trying To Access A View In A Library Project

I have a library project I'm importing in other project. When I try to compile it, console says this (in red): [2012-07-11 13:12:53 - Library] Could not find Library.apk! This lib

Solution 1:

I had same problem ,now it's clear by the given action.

Please try Go to your project build path->order and export .Select you library files and press the buttons up,down. It will clear some confusion to get the library files .