Possible Duplicate:
How to regenerate R class?
I didn't know so yes i did close the emulator at the construction time and my R.java is gone, how do fix it? i researched and they said it could be some Capital Letter but everything in my project is lowercased so i dont know what to do.
I did clean my project more then 10 times and nothing.
I also did import all R in every file and cleaned it but no result.
EDIT
The error appeared when i changed the Project version from 4.1 to 2.2 so I changed back to 4.1 and the R.java got back, but why does it desappear when is 2.2? because I need it to be 2.2