title: android detect continue up-down scroll
body: <p>I am developing application with custom list. I am overriding touch event of the list.
  list scrolls nicely if I scroll once ( touch and move finger up or down once). When I scroll list up - down without leaving the list (i.e touch move up then down and then leave), in this case list is not getting scrolled properly. As action_move called for first scroll only, i.e for up when I move list down action_move is not getting detected.
   Please let me know if anybody tried to do this. 
  Any code snippet will be of great help.</p>
  
  <p>Thanks</p>