When I was working with 1 project
Yes, you were working with 1 project. The assets in libgdx are in the Android project, and you normally will change the main project. That means, Android project will not be refreshed automatically since eclipse will not invoke a build on it for no reason.
On a side note, you should really try to be more polite on this forum, specially to people trying to help. This is not the first nor second time I see you talking to people like they have the obligation to help you and give you the answer you deem correct. More specially in the case he is right and you are wrong - it is not a libgdx problem.