原文：https://blog.csdn.net/uyy203/article/details/78925559
private class JudgeScrollType implements AbsListView.OnScrollListener
{
private int trendY = 0;
private int TotalTrendY = 0;
private int lastTop = 0;
private int top = 0;
private int lastTag = 0;
private int count = 0;
private int maxCount = 5;
private int duration = 300;
@Override
public void onScroll(AbsListView view, int firstVisibleItem, int visibleItemCount, int totalItemCount)
{
if(view.getChildAt(0).getTop() == 0 || firstVisibleItem != lastTag)
{
top = 0;
lastTop = 0;
trendY = 0;
}
else
{
top = -view.getChildAt(0).getTop();
}
trendY = top - lastTop;
lastTop = top;
lastTag = firstVisibleItem;
//數(shù)據(jù)降噪
if(top == trendY)
{
trendY = 0;
}
//取5個趨勢值，然后取均值，利用均值作為判斷趨勢值
if(count < maxCount)
{
TotalTrendY += trendY;
count++;
}
else
{
trendY = TotalTrendY / count;
// count = 0;
TotalTrendY = 0;
}
if((count >= maxCount && trendY < 0) )
{
/**列表下滑時對應(yīng)操作**/
}
else if(count >= maxCount && trendY > 0 )
/**列表上滑時對應(yīng)操作**/
}
if(count >= maxCount)
{
count = 0;
}
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState)
{
}
}
