@Override
    public void stop() {
        mParent.clearAnimation();
        setRotation(0);
        mRing.setShowArrow(false);
        mRing.setColorIndex(0);
        mRing.resetOriginals();
    }
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
ptr-lib/src/in/srain/cube/views/ptr/header/MaterialProgressDrawable.java