我想在gridview的滚动运行到屏幕结束时加载更多数据，并且我在滚动侦听器上使用set，但是当滚动运行到结束时它会调用double load 我的EndScrollGridHome.java
public class EndScrollGridHome implements OnScrollListener {
private int visibleThreshold = 0;
private int currentPage = 0;
private int previousTotal = 1;
private boolean loading = true;
private String url;
private int totalItem = 10;
ArrayList<Posts> arrData = new ArrayList<Posts>();
BaseAdapter adapter;
private Context context;
private Dialog dialog1;
Activity activiy;
ArrayList<Posts> listPosts;
ArrayList<Posts> listPostsGrid;
ArrayList<Posts> listLoad;
String name;
String value;
private ImageView imgLoad;
private Animation anim;
private ListView list_popular;
private int mLastFirstVisibleItem;
private boolean mIsScrollingUp;
private Scrolling sCrolling;
public EndScrollGridHome(ArrayList<Posts> listPostsGrid,
BaseAdapter adap, Context context, String url,
Activity activiy) {
this.visibleThreshold = visibleThreshold;
this.adapter = adap;
this.context = context;
this.url = url;
this.activiy = activiy;
this.listPosts = listPosts;
this.listPostsGrid = listPostsGrid;
}
@Override
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
if (totalItemCount > totalItem) {
totalItem = totalItemCount;
}
if (loading) {
Log.d("OKKKKK", "" + totalItemCount + " " + visibleItemCount + " "
+ firstVisibleItem + " " + visibleThreshold);
if (totalItemCount > previousTotal) {
loading = false;
previousTotal = totalItemCount;
currentPage++;
}
}
if (!loading
&& (totalItemCount - visibleItemCount) <= (firstVisibleItem + visibleThreshold)&&firstVisibleItem!=0) {
Log.d("Load more !", totalItemCount+ " " +visibleItemCount +" "+firstVisibleItem);
loading = true;
}
}
@Override
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
}