Githup上第三方控件的地址收藏

1. 倒计时 https://github.com/iwgang/CountdownView

2. RecyclerView实现带有头部的顶部悬浮置顶布局https://github.com/byd666/CeilingDemo

3. Android加载Gif和ImageView的通用解决方案：android-gif-drawable     https://github.com/koral--/android-gif-drawable

4. 方框验证码https://github.com/liuguangli/VerificationCodeInput
5. 标记https://github.com/qstumn/BadgeView