Android Question Question regarding scrollview height ( + project attached )

Hi,
I try to create scrollview(A), then I load layout,
and inside that I create :
B. another layout
C. panel inside that layout
D. then, listview

Question :
1. how to make the scrollview (A) & panel that hold listview (B) have dynamic height based on listview (D) height content ?

2. In the project I also try to use imagedownloader but failed, how is the correct way to use it using listview ?

Screenshot & project attached