ConstraintLayout 优秀博客

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Constraint Layout 1.1.x带来了哪些新东西？ - 泡在网上的日子
http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2017/1019/8618.html
ConstraintLayout: Circular Positioning - 泡在网上的日子 http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2017/1015/8597.html
ConstraintLayout之Barrier - 泡在网上的日子 http://www.jcodecraeer.com/a/anzhuokaifa/androidkaifa/2017/1017/8601.html
http://www.qingpingshan.com/m/view.php?aid=362115

Android新特性介绍，ConstraintLayout完全解析 - 郭霖的专栏 - CSDN博客http://blog.csdn.net/guolin_blog/article/details/53122387

ConstraintLayout 属性详解 和Chain的使用 - 掘金 https://juejin.im/post/5924f1c1a22b9d0058a25a43

动态图解&实例 ConstraintLayout Chain - 掘金 https://juejin.im/post/592655630ce46300574be298
Android ConstraintLayout详解 - 简书 http://www.jianshu.com/p/768b9e47a77b
[译] ConstraintLayout深入系列之代替常见布局 - 学会编程 - SegmentFault https://segmentfault.com/a/1190000009565417