Listview with extra spaces (padding)

MyListView.java

public class MyListView extends ListView
{

    private android.view.ViewGroup.LayoutParams params;
	private int oldCount = 0;

    public MyListView(Context context, AttributeSet attrs)
    {
        super(context, attrs);
    }

    @Override
    protected void onDraw(Canvas canvas)
    {
        if (getCount() != oldCount) 
        {
            int height = getChildAt(0).getHeight() + 3 ;
            oldCount = getCount();
            params = getLayoutParams();
            params.height = (getCount()) * height;
            setLayoutParams(params);
        }

        super.onDraw(canvas);
    }

}