Floating action button 을 사용해보자

참조 자료들

http://samsetdev.blogspot.kr/2015/05/floating-action-button-material-design.html


https://libraries.io/github/str4d/android-floating-action-button

https://www.npmjs.com/package/nativescript-floatingactionbutton

http://www.viralandroid.com/2016/02/android-floating-action-menu-example.html
http://stackoverflow.com/questions/26740107/is-there-a-library-for-floating-action-buttons-fab-with-labels







<Expand floating button>

http://stackoverflow.com/questions/31111431/android-vertically-expanded-floating-action-button



https://blog.stylingandroid.com/floating-action-button-part-3/
part-(1~3) 써도 됨



<android expand circular floating button>

https://github.com/oguzbilgener/CircularFloatingActionMenu