我有一个列表视图,里面有很多项目的线性布局。现在我想有一个imageview按钮,说明滚动向下,直到滚动视图的结束,一旦结束是达到隐藏它自己。再次,一旦用户向上滚动,imageview应该重新出现。谁能告诉我如何检测滚动视图的结束??搜索了几个论坛,但他们已经给出了列表视图,但我迫切需要滚动视图。请帮助!
可以通过以下代码检测滚动结束
if (yourListView.getLastVisiblePosition() == yourListView.getAdapter().getCount() -1 &&
yourListView.getChildAt(yourListView.getChildCount() - 1).getBottom() <= yourListView.getHeight())
{
//It is scrolled all the way down here
}
希望能有所帮助。
您必须检查BaseAdapter类中getView(int position, View convertView, ViewGroup parent)
方法的数组列表计数
public View getView(int position, View convertView, ViewGroup parent) {
LayoutInflater inflater = (LayoutInflater) context
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
View rowView = inflater.inflate(R.layout.rowlayout, parent, false);
ImageView imageView = (ImageView) rowView.findViewById(R.id.icon);
// Change the visibility here
if(list.size >= position)
imageView.setVisibility(View.Gone);
else
imageView.setVisibility(View.Visible);
return rowView;
}