Scrolling listview with buttons

Question

I want to scroll my listview by pressing the buttons. Am using two buttons up and down and when i press up button the listview should move one row up and when i press down button the listview should move one row down.

My listview is based on this link. I found a good example of scrollview here. Now my question is instead of scrollview i need to use my listview and it should increase/decrease by one row. As am new to android anyone help me in solving this issue. Thanks in advance.

Answer 1

You can try either of the following:

For a direct scroll:

getListView().setSelection(int);

For a 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); // For increment. 

}
});

However you need to handle one case, that is if only half or part of the view at the top is visible.

Answer 2

Have you even checked for IDE suggestions? ;)

ListView lv = (ListView) findViewById(R.id.myListView);

// to scroll to a given position
lv.scrollTo(int x, int y);

// to scroll by a given number of dp
lv.scrollBy(int x, int y);