What you need is a Draggable Bottom Card. I made a lib. for this, but I haven't published it yet.
i have published sample code, but this is not as mature as my lib. but this should be enough for a thought-provoking:
Anyone have done this view like facebook draggable bottom card? if dont, whats the best way to do this for work with B4A and B4i? thanks in advance Alberto Iglesias
www.b4x.com