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版本太低了要2.2才可以用match_parent，你只能用fill_parent
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).

從網(wǎng)上找了些資料貼上面了，看看是不是對你有幫助。