DropEditText

https://blog.csdn.net/jdsjlzx/article/details/46860563    https://github.com/qibin0506/DropEditText

https://download.csdn.net/download/heiyelijie/6954347

https://blog.csdn.net/u014293306/article/details/52402537

http://yuxiatongzhi.iteye.com/blog/2067343