[Android] FILL_PARENT is Deprecated, Use MATCH_PARENT Instead (Android 2.2 and Later)
In Android app development, FILL_PARENT is deprecated from version 2.2 onwards, so you should use MATCH_PARENT instead.
However, it seems to be just a name change refactoring.
[Reference]
・Yukiの枝折: Android:match_parentとfill_parent
That’s all from the Gemba.