android layout filename is green? and everything else is red

Question

http://i.stack.imgur.com/hybC5.png

Can anyone explain why the text for one of my files is green?

The code for my layouts is working, and it usually would be underlined with red if there was a problem.

Any changes that I have made in the green file are also not showing up, in my specific case, a button is added to the green file but it's not being displayed

Answer 1

This color coding has nothing to do with errors. Green indicates new files in the version control system (e.g., git), red is for files that are not added to the VCS, blue - for changed files since last commit, and white - for ignored files.