Android : gen already exists but is not a source folder. Convert to a source folder or rename it

I took "Explicit_Intents/gen already exists but is not a source folder. Convert to a source folder or rename it." error in Eclipse and my solution is;

Right click on the project and choose "Properties" / Alt + Enter

Java Built Path

Source tab

Add Folder

Choose "gen" and "src" 

It work with my project.

See you

Derya

Firstly..

Hello I am Derya,

In this blog, i am planning to share problems/errors with their solutions which i faced for you and myself to don't repeat :) 

I am a  3rd year computer engineering student. I am not perfect student, not a professional coder, maybe my  solutions wont work with your code but i believe this will be a good job!