Java tutorial
//package com.java2s; import android.graphics.Color; public class Main { public static int compareSpan(int colorOld, int colorLast) { int or = Color.red(colorOld); int og = Color.green(colorOld); int ob = Color.blue(colorOld); int lr = Color.red(colorLast); int lg = Color.green(colorLast); int lb = Color.blue(colorLast); return (Math.abs(or - lr) + Math.abs(og - lg) + Math.abs(ob - lb)) / 3; } }