private int generateColor() {
            int red = ((int) (Math.random() * 200));
            int green = ((int) (Math.random() * 200));
            int blue = ((int) (Math.random() * 200));
            return Color.rgb(red, green, blue);
        }
Custom adapter that supplies view holders to the RecyclerView. Our view holders
contain a simple LinearLayout (with a background color) and a TextView (displaying
the value of the container's bg color).
RecyclerViewAnimations/app/src/main/java/examples/android/com/recyclerviewanimations/MainActivity.java