ConstraintLayout:
https://www.jianshu.com/p/17ec9bd6ca8a
https://blog.csdn.net/lmj623565791/article/details/78011599
https://juejin.im/post/5ae869306fb9a07a9d70201f#heading-8
ConstraintLayout:
https://www.jianshu.com/p/17ec9bd6ca8a
https://blog.csdn.net/lmj623565791/article/details/78011599
https://juejin.im/post/5ae869306fb9a07a9d70201f#heading-8