flutter_pager_list 0.0.2

flutter listview refresh and loading more with pager and page loading，empty，error show

flutter_pager_list

flutter listview refresh and loading more with pager and page loading，empty，error show
列表封装下拉刷新，加载更多，同时支持设置头部和底部，支持设置页面数据加载中，数据为空或者加载失败显示
使用方法：

PagerListView(
      headerBuilder: headerBuilder,
      footerBuilder: footerBuilder,
      itemBuilder: itemBuilder,
      pagerBuilder: pageBuilder,
      useLoadMore: true,
      pageSize:20,),
      
主要看分页数据获取处理pagerBuilder，该回调用来获取指定页数的数据，一般为请求接口数据，例如例子中的延迟模拟数据

Future<List<String>> pageBuilder(int page,List currentDatas) async {
  await Future.delayed(Duration(seconds: 0, milliseconds: 2000));
  List<String> dummyList = List();
  //测试第三页加载失败
  if(page == 3) {
    throw FormatException('处理失败，请重试');
  }
  // 测试空数据
  //   if(page == 1) {<br/>
   //     return dummyList;<br/>
  //   }
  int start = 0;
  if(currentDatas != null && page > 1) {
    start = currentDatas.length;
  }
  for (int i = start; i < start + 20; i++) {
    dummyList.add('Item $i');
  }
  return dummyList;
  }

效果图如下：

Getting Started