如何实现机器人的材料设计的圆形进度条
我想要像在收件箱Gmail的Android应用的材料设计，圆形的进度条。我如何归档这个（pre棒棒糖装置）？
I want to make a material design circular progress bar like the one in Inbox by Gmail android app. How do i archive this (in pre lollipop devices)?
试图实现这样一个类似的效果。 收件箱Gmail的材料设计的圆形进度条
Am trying to achieve a similar effect like this. Inbox by Gmail material design circular progress bar
下面是一个真棒实现材料设计的圆形中间进度条https://gist.github.com/castorflex/4e46a9dc2c3a4245a28e.实施不仅缺乏的能力，添加各种颜色，如在收件箱的Android应用程序，但是这确实一个pretty的伟大的工作。
Here is an awesome implementation of the material design circular intermediate progress bar https://gist.github.com/castorflex/4e46a9dc2c3a4245a28e. The implementation only lacks the ability add various colors like in inbox by android app but this does a pretty great job.