match_parent和fill_parent的区别

match_parent和fill_parent的区别

其实从Android 2.2开始FILL_PARENT改名为MATCH_PARENT ，从API Level为8开始我们可以直接用MATCH_PARENT来代替FILL_PARENT，他们的定义本质是一样均为-1，只是换了个别名，可能为了更准确些，比如最终在SDK中的定义为:

• 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).
  
  使用fill_parent，会有蓝色锯齿状的边框出现
  使用match_parent，没有任何边框