@Override
        public String toString() {
            return super.toString() + " \"" + textView.getText() + "\"";
        }
Custom change animation. Fade to black on the container background, then back
up to the new bg coolor. Meanwhile, the text rotates, switching along the way.
If a new change animation occurs on an item that is currently animating
a change, we stop the previous change and start the new one where the old
one left off.
RecyclerViewAnimations/app/src/main/java/examples/android/com/recyclerviewanimations/MainActivity.java