Is it a good thing to write logic based on the hex value of id generated in R.java android

Question

This what I have seen in an android application. They have a number of image buttons with ids

R.java :
        public static final int img1=0x7f090080;
        p         


        

Answer 1

Though this might work OK most of the times, this is definitely not advisable. The R class is generated automatically thus you have no control over it and it could change. There is a solution to this problem using a typed array in resources. Check for example this answer.