about the content view's height

dear sir:
I put some control in the pulltorefresharp.android.widget.ScrollView, they are putted in the gridlayout/linearlayout.but the height always show the wrap_content ,not my setting height(match_parent/fit_parent).
it will show like below,please help me,thanks.

https://farm9.staticflickr.com/8820/18175385832_36ef583895_o.png
