Android Rect和RectF的区别

http://longshuai2007.blog.163.com/blog/static/142094414201161832810371/

1、精度不一样，Rect是使用int类型作为数值，RectF是使用float类型作为数值
2、两个类型提供的方法也不是完全一致

Rect：
equals(Object obj)   (for some reason it as it's own implementation of equals)
exactCenterX()
exactCenterY()
flattenToString()
toShortString()
unflattenFromString(String str)

RectF：
round(Rect dst)
roundOut(Rect dst)
set(Rect src)