bindingdata来实现MVVM

1.通过databinding实现MVVM

https://www.jianshu.com/p/bd9016418af2

2.databinding更新imageview图片

https://blog.csdn.net/zhangphil/article/details/79346064

3.databinding双向绑定

https://www.jianshu.com/p/564bb7f21fcc

4.github MVVM框架（不兼容）

https://github.com/goldze/MVVMHabit

5.mvvm 参考demo

https://github.com/erikjhordan-rey/People-MVVM

https://github.com/husaynhakeem/TicTacToe-MVVM

第一步：databinding双向绑定

1.   Layout页面alt+enter

2.   设置变量名字，引用其他类

建立可以观察的model

[if !supportLists]1.    [endif]新建view1model绑定view和model并写入所需要的业务逻辑和事件

[if !supportLists]1.    [endif]绑定view控件