match_parent, wrap_content, 和 fill_parent 区别联系

fill_parent   -1  The view should be as big as its parent (minus padding). This constant is deprecated starting from API Level 8 and is replaced by match_parent.  

match_parent   -1 The view should be as big as its parent (minus padding). Introduced in API Level 8.  

wrap_content   -2  The view should be only big enough to enclose its content (plus padding).  

从Android 2.2开始FILL_PARENT改名为MATCH_PARENT ，定义本质是一样均为-1，只是换了个别名。

参考文章：

http://blog.csdn.net/junjieking/article/details/7067855

http://blog.sina.com.cn/s/blog_4ca9ceef0100zwc9.html