Android ConstraintLayout布局详解

• 解析ConstraintLayout的性能优势
  https://mp.weixin.qq.com/s/gGR2itbY7hh9fo61SxaMQQ
• 为什么ConstraintLayout代替其他布局?
  http://www.jianshu.com/p/32a0a6e0a98a
• Android新特性介绍，ConstraintLayout完全解析
  http://blog.csdn.net/guolin_blog/article/details/53122387
• 布局详解：
  http://blog.csdn.net/qq_34902522/article/details/78303211?utm_source=gank.io&utm_medium=email