Android代码-CircularProgressDrawable

CircularProgressDrawable A drawable with capabilities to indicate progress. Why a drawable? If you want to achieve interesting effects and animations on Android, a surprisingly easy and fast way to achieve it is subclassing a Drawable instead of subclassing a Button or an ImageView. In order to implement advanced behavior over the Drawable, you can still implement your own animations by using Android animations framework or by the use of listeners on the views you are using. Download Bundle Cir