android - Scrolling listview with buttons -

i want scroll listview pressing buttons. using 2 buttons , down , when press button listview should move 1 row , when press down button listview should move 1 row down.

my listview based on this link. found example of scrollview here. question instead of scrollview need use listview , should increase/decrease 1 row. new android me in solving issue. in advance.

you can try either of following:

for direct scroll:

getlistview().setselection(int); 

for smooth scroll:

getlistview().smoothscrolltoposition(int); 

sample code:

public view.onclicklistener onchk = new view.onclicklistener() {              public void onclick(view v) {                   int index = list.getfirstvisibleposition();                  getlistview().smoothscrolltoposition(index+1); // increment.   } }); 

however need handle 1 case, if half or part of view @ top visible.