Paging

A Flutter package that supports pagination(load infinite) for ListView, GridView

Demo

DataSource

PageKeyedDataSource

To create a PagingListView or PagingGridView you will need create class which extended from PageKeyedDataSource.

When extended from PageKeyedDataSource, you will need override 2 methods is loadInitial and loadPageAfter.

Output of those function is a Tuple2 with item1 is List<D> is List of data, end item2 is next page index.

Example: if your list start with page index is 0. -> on loadInitial output is Tuple2([...], 1) 1 is next page when load more item.

Example:

class ListViewDataSource extends paging.PageKeyedDataSource<int, Note> {
  NoteRepository noteRepository;

  ListViewDataSource(this.noteRepository);

  @override
  Future<Tuple2<List<Note>, int>> loadInitial(int pageSize) async {
    return Tuple2(await noteRepository.getNotes(0), 1);
  }

  @override
  Future<Tuple2<List<Note>, int>> loadPageAfter(int params, int pageSize) async {
    return Tuple2(await noteRepository.getNotes(params), params + 1);
  }
}

Display on UI

To display on UI, currently you can use PagingListView or PagingGridView.

Example:

      ListViewDataSource dataSource = ListViewDataSource(NoteRepository());

      PagingListView<Note>(
        itemBuilder: (context, data, child) => NoteWidget(data),
        pageDataSource: dataSource,
      ),