Eclipse The R class is not being built for my android projects

Question

My system crashed and I had to re-install all my software. Now only like,..... half my android projects will build. It seems like the R class is not being built. I had this is

Answer 1

It happens to me too, very often. In general when R.javadisappears that means that there is an error somewhere in your project (which prevents this file to be generated).

Verify carefully, if everything is Ok especially in your resources files (XML files). Eclipse can help you determining what is wrong in the Problems window.