[英]recyclerview and pagination scrolling issue
I am using recycler view pagination to show my data. 我正在使用回收站视图分页来显示我的数据。 I am loading one page api data by default, for next page i am loading data on the scroll basis of the recycler view.
默认情况下,我正在加载一页api数据,对于下一页,我将在回收者视图的滚动基础上加载数据。 But scroll is not getting called as i can see only 1 page.
但是滚动并没有被调用,因为我只能看到一页。 If i put the condition in on scroll for increasing page no.
如果我把条件放在滚动上以增加页面编号。 then on scroll method its not stopping & its calling api till last page in background.
然后在滚动方法上它不会停止及其调用API直到后台的最后一页。 Meaning on scroll is calling again and again that I don't want.
滚动上的意思是一遍又一遍我不想要的电话。 I want to scroll on basis of current visible items.
我想根据当前可见项目滚动。
live_grid.addOnScrollListener(new PaginationScrollListener(gridLayoutManager) {
@Override
protected void loadMoreItems() {
// TODO: 07/11/16 check if totalPage > 1 before triggering next load
Log.d(TAG, "live_grid loadMoreItems.......");
int visibleItemCount = gridLayoutManager.getChildCount();
int totalItemCount = gridLayoutManager.getItemCount();
int firstVisibleItemPosition = gridLayoutManager.findFirstVisibleItemPosition();
Log.d(TAG, "visibleItemCount: "+ visibleItemCount);
Log.d(TAG, "totalItemCount: "+totalItemCount);
Log.d(TAG, "firstVisibleItemPosition: "+firstVisibleItemPosition);
Log.d(TAG, "currentPage: "+currentPage);
Log.d(TAG, "PAGE_SIZE: "+PAGE_SIZE);
if (!isLoading && !isLastPage) {
// if ((visibleItemCount + firstVisibleItemPosition) >= totalItemCount && firstVisibleItemPosition >= 0) {
if ((visibleItemCount + firstVisibleItemPosition) >= totalItemCount && firstVisibleItemPosition >= 0 && currentPage < (PAGE_SIZE)) {
//&& totalItemCount >= PAGE_SIZE
firstVisibleItemPosition = visibleItemCount;
loadMoreItems1();
}
}
// presenter.setIsLoading(true);
// presenter.setCurrentPage(presenter.getCurrentPage() + 1);
// presenter.loadNextPlaylist();
}
Try this code.. 试试这个代码。
protected int pastVisibleItems, visibleItemCount, totalItemCount; // define class level..
protected void addScrollListener() {
rvData.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
if (dy > 0) //check for scroll down
{
visibleItemCount = linearLayoutManager.getChildCount();
totalItemCount = linearLayoutManager.getItemCount();
pastVisibleItems = linearLayoutManager.findFirstVisibleItemPosition();
if ((visibleItemCount + pastVisibleItems) >= totalItemCount) {
pageNumber++; // increase your page
getMessage(); // call api with new Page.
}
}
}
});
}
this method used after recyclerview define and bind adapter. recyclerview定义并绑定适配器后使用此方法。
GridLayoutManger.. GridLayoutManger ..
RecyclerView.OnScrollListener scrollListener = new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
super.onScrolled(recyclerView, dx, dy);
int totalItrem = mLlManager.getItemCount();
int lastViisble = mLlManager.findLastVisibleItemPosition();
Log.d("item", "total item" + totalItrem);
Log.d("visible", "last " + lastViisble);
if (!isLoading && totalItrem == lastViisble + 1 && total_records != mEventList.size()) {
Log.e("msg", "reached end");
//Toast.makeText(mrecyclerview.getContext(), "reached at end", Toast.LENGTH_SHORT).show();
isLoading = true;
mEventList.add(null);
mCurrentPage++;
new Handler().postDelayed(new Runnable() {
@Override
public void run() {
getData(mCurrentPage);
}
}, 2000);
}
}
};
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