@Override
            public void onAnimationEnd(Animation animation) {
                ring.goToNextColor();
                ring.storeOriginals();
                ring.setShowArrow(false);
                mParent.startAnimation(mAnimation);
            }
Set the colors used in the progress animation from color resources.
The first color will also be the color of the bar that grows in response
to a user swipe gesture.

@param colors
common/src/main/java/com/sxjs/common/widget/pulltorefresh/header/MaterialProgressDrawable.java