res下面的文件夹有什么作用的啊
已经有values文件夹，为什么还要增加下面的呢
values-large/values-large-long/values-large-notlong/values-long/values-normal/values-normal-long/values-normal-notlong/values-notlong/values-small/values-small-long/values-small-notlong/
