res下各個文件夾的含義

resources are kept in the res directory and can be one of several types:
■ res/anim —XML representations of frame-by-frame animations
■ res/drawable —.png, .9.png, and .jpg images
■ res/layout —XML representations of View objects
■ res/values —XML representations of strings, colors, styles, dimensions, and arrays
■ res/xml —User-defined XML files (that are also compiled into a binary form)
■ res/raw —Arbitrary and uncompiled files that can be added