[TOC]

flutter expendable listview sticky

ExpendableListView 主要功能

1. 点击折叠展开功能，section里多个child不卡顿

我看到大多类库是用ListView+colum(children[]) 实现的，如果section的child比较多就会出现卡顿，比如ListView+ExpansionTile

2. 支持吸顶header

导入方式

暂未发布到pub上

  flutter_expendable_listview:
    git:
      url: git://github.com/LuckyJayce/flutter_expendable_listview.git

使用方式:

1. ExpendableListView添加到界面上

ExpendableListView(
  sticky: sticky,
  delegate: MyListDelegate(data),
)

2. 自定义ExpendableListDelegate

   class MyListDelegate implements ExpendableListDelegate {
     List<List<String>> data = [];
   
     MyListDelegate(this.data);
   
     @override
     int getSectionChildCount(int sectionIndex) {
       return data[sectionIndex].length;
     }
   
     @override
     int getSectionCount() {
       return data.length;
     }
   
     @override
     Widget buildSectionHeader(BuildContext context, int sectionIndex, bool expended) {
       return Container(
         decoration: BoxDecoration(color: Colors.grey),
         child: ListTile(
             title: Text('section:$sectionIndex'),
             trailing: ExpandIcon(
               // ValueKey(sectionIndex) 可以变为floatHeader导致重新执行动画
               key: ValueKey(sectionIndex),
               isExpanded: expended,
               onPressed: null,
             )),
       );
     }
   
     @override
     Widget buildSectionChild(BuildContext context, int sectionIndex, int childIndex) {
       return ListTile(
         title: Text(data[sectionIndex][childIndex]),
       );
     }
   }
   

效果图