Android UI - Linear Layout

I'm displaying some controls such as text boxes above the game screen. When I hide the controls and then re-display them using setVisibility(), they move off the screen, however I can just see the bottom border of the bottom-most control, and selecting that brings all the controls back to the original position.

Can any of you tell me what is going 开发者_开发问答on, should I be trying out some other layout?