I’m a little confused about two XML properties:
fill_parent. It seems that both are the same. Is there any difference between them?
They’re the same thing (in API Level 8+). Use
FILL_PARENT (renamed MATCH_PARENT in API Level 8 and higher), which means that the view wants to be as big as its parent (minus padding)
fill_parent: The view should be as big as its parent (minus padding). This constant is deprecated starting from API Level 8 and is replaced by