Android实现文件上传和下载倒计时功能的圆形进度条

 step1. Add it in your root build.gradle at the end of repositories:
   allprojects {
    repositories {
     ...
     maven { url 'https://jitpack.io' }
    }
   }

 step2. Add the dependency
   dependencies {
   compile 'com.github.yanjiabin:ExtendsRingPrigressBar:1.1.1'
   }

in your xml