我有一个RecyclerView,我试图实现无限滚动功能.问题是,OnScrolled方法中if语句中的代码正在执行两次.继承我目前的代码：
public abstract class InfiniteScroll extends RecyclerView.OnScrollListener {
private LinearLayoutManager mLayoutManager;
private int prevIoUsTotal = 0;
private boolean loading = true;
private int visibleThreshold = 5;
int firstVisibleItem,visibleItemCount,totalItemCount;
private int current_page = 1;
public InfiniteScroll(LinearLayoutManager layoutManager) {
mLayoutManager = layoutManager;
}
@Override
public void onScrolled(RecyclerView recyclerView,int dx,int dy) {
visibleItemCount = recyclerView.getChildCount();
totalItemCount = mLayoutManager.getItemCount();
firstVisibleItem = mLayoutManager.findFirstVisibleItemPosition();
if (loading) {
if (totalItemCount > prevIoUsTotal) {
loading = false;
prevIoUsTotal = totalItemCount;
}
}
if (!loading && (totalItemCount - visibleItemCount)
<= (firstVisibleItem + visibleThreshold)) {
// End has been reached
// Do something
current_page++;
Log.d("moreitems","why is this being called twice?");
loadMore(current_page);
loading = true;
}
}
public abstract void loadMore(int current_page);
}
这个代码是作为一个单独的SO问题的答案发布的,其他示例似乎功能类似,但我仍然得到loadMore()方法执行两次到达RecyclerView的底部,我不知道为什么.
