[英]How to implement load more Pagination(infinite scrolling) on RecyclerView using data from Firebase database
[英]How to fix pagination to load more data from server in RecyclerView?
我想從服務器加載更多數據。 我應該從項目在RecyclerView
獲取firstItemId
。 在listView
我就是這樣做的。
listMain.setOnScrollListener( new AbsListView.OnScrollListener() {
public void onScrollStateChanged(AbsListView view, int scrollState) {
}
public void onScroll(AbsListView view, int firstVisibleItem,
int visibleItemCount, int totalItemCount) {
if (firstVisibleItem + visibleItemCount == totalItemCount && totalItemCount != 0) {
if (lasttotal[getArguments().getInt( ARG_SECTION_NUMBER )] != totalItemCount) {
lasttotal[getArguments().getInt( ARG_SECTION_NUMBER )] = totalItemCount;
lastpage[getArguments().getInt( ARG_SECTION_NUMBER )]++;
try {
JSONObject js_id = new JSONObject( view.getItemAtPosition( firstVisibleItem - 2 ).toString() );
static_id_news = js_id.getInt( "Id" );
if (getArguments().getInt( ARG_SECTION_NUMBER ) != 0)//"page=0&tagid="
new ApiNews( getActivity(), (ArrayAdapter) listMain.getAdapter(), rootView, ly_dialog ).execute( "id=" + static_id_news + "&tagid=" + newsnum[getArguments().getInt( ARG_SECTION_NUMBER )] + "&page=" + scroll_last_page + 1, 2 );
else
new ApiNewsPaper( getActivity(), (ArrayAdapter) listMain.getAdapter(), rootView, ly_dialog ).execute( lastpage[getArguments().getInt( ARG_SECTION_NUMBER )] );
} catch (JSONException e) {
e.printStackTrace();
}
}
}
}
});
現在我想要一個例子,它將獲取row
的 id 並發送它以加載更多數據。 謝謝。
為recyclerview
嘗試此解決方案
您應該使用recyclerview
,它比listview
更好,因為它速度快,復雜度低,並且可以像交錯視圖一樣進行自定義
private int pastVisiblesItems, visibleItemCount, totalItemCount;
private boolean loading = true;
recyclerView.addOnScrollListener(new RecyclerView.OnScrollListener() {
@Override
public void onScrolled(RecyclerView recyclerView, int dx, int dy) {
if (dy > 0) //check for scroll down
{
visibleItemCount = gridLayoutManager1.getChildCount();
totalItemCount = gridLayoutManager1.getItemCount();
pastVisiblesItems = gridLayoutManager1.findFirstVisibleItemPosition();
if (loading) {
if ((visibleItemCount + pastVisiblesItems) >= totalItemCount) {
loading = false;
//Do pagination.. i.e. fetch new data
}
}
}
}
});
並將加載設置為 true 以響應您的api
就像在成功和失敗的情況下一樣
loading = true;
其中gridLayoutManager1
是布局管理器,它也可以是linearlayout
和gridlayout
,這取決於您的recyclerview
recyclerViews.setLayoutManager(gridLayoutManager1);
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