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Grammar: difference between a top down and bottom up? (Example)

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This is a follow up question from Grammar: difference between a top down and bottom up? I understand from that question that: the grammar itself isn't top-down or bottom-up, the parser is there are grammars that can be parsed by one but not the other (thanks Jerry Coffin So for this grammar (all possible mathematical formulas): E -> E T E E -> (E) E -> D T -> + | - | * | / D -> 0 D -> L G G -> G G G -> 0 | L L -> 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 Would this be readable by a top down and bottom up parser? Could you say that this is a top down grammar or a bottom up grammar (or neither)? I am

Android: How do I add a footer to a fullscreen scrollview?

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问题 I want the footer to be anchored at the bottom of the screen if and only if it can be anchored there without overlapping any other views. The problem is that I don't know how many views are going to be added to the header or the footer. If putting the footer at the bottom of the window would make it overlap, I want to put the footer at the bottom of the scrollview. (Maybe by adding it to the RelativeLayout with the rule that it needs to be below the top component?) Here is a pic of what I'm

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