Flutter数据列表展示插件devaloop_data_list_view的使用
Flutter数据列表展示插件devaloop_data_list_view的使用
Data List View 插件用于展示数据项列表、数据操作和数据摘要。以下是插件的使用方法及完整示例。
使用方法
import 'package:devaloop_data_list_view/data_list_view.dart';
import 'package:flutter/material.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Data List View',
debugShowCheckedModeBanner: false,
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue.shade900),
useMaterial3: true,
),
home: Scaffold(
body: Container(
color: Colors.grey.shade100,
child: Card(
elevation: 0,
color: Colors.white,
margin: const EdgeInsets.all(15),
child: Padding(
padding: const EdgeInsets.symmetric(horizontal: 15),
child: DataListView(
title: 'Clinical Checkups',
dataItems: [
DataItem(
title: 'Blood Complete',
subtitle: const Text('Blood check up complete'),
onTap: () {},
),
DataItem(
title: 'ACA IgG',
subtitle: const Text(
'Cardiolipin antibodies (ACA) are autoantibodies produced by the body\'s immune system which mistakenly attacks cardiolipin, a substance found in the outer layer of cells (cell membranes) and platelets. These autoantibodies can affect the body\'s ability to regulate blood clotting.'),
onTap: () {},
),
DataItem(
title: 'ACA IgM',
subtitle: const Text(
'Cardiolipin antibodies (ACA) are autoantibodies produced by the body\'s immune system which mistakenly attacks cardiolipin, a substance found in the outer layer of cells (cell membranes) and platelets. These autoantibodies can affect the body\'s ability to regulate blood clotting.'),
onTap: () {},
),
DataItem(
title: 'Anti-Beta2-Glikoprotein 1',
subtitle: const Text(
'Anti-β2 Glycoprotein 1 is the main protein that binds to phospholipid and cardiolipin antibodies.'),
onTap: () {},
),
DataItem(
title: 'APTT',
subtitle: const Text(
'Activated partial thromboplastin time (APTT) is a laboratory test to assess the activity of intrinsic and common pathway coagulation factors, namely factor factor IX (Christmas factor), factor VIII (antihemophilic factor, AHF), factor X (Stuart factor), factor V (proaccelerin), factor II (prothrombin) and factor I (fibrinogen). This test is for monitoring heparin therapy or the presence of circulating anticoagulant. The APTT is prolonged due to a deficiency of intrinsic coagulation factors and if the level is <> 7 seconds from the normal value, then the examination results are considered abnormal.'),
onTap: () {},
),
DataItem(
title: 'AT III',
subtitle: const Text(
'Antithrombin III (ATIII) is a vitamin K-independent protease that inhibits coagulation by neutralizing the activity of thrombin enzymes (factors IIa, IXa, Xa). Antithrombin III activity is markedly potentiated by heparin, the primary mechanism by which heparin and low molecular weight heparins produce anticoagulation.'),
onTap: () {},
),
DataItem(
title: 'CD 34',
subtitle: const Text(
'CD34 is a protein found in living creatures such as humans, mice, rats and other species. Even though it is found in the body, such as in the bone marrow, blood vessel lining and certain cells, CD34 is also found in several types of tumor cells.'),
onTap: () {},
),
DataItem(
title: 'Colestrol',
subtitle: const Text('Blood checkup complete'),
onTap: () {},
),
DataItem(
title: 'Colestrol',
subtitle: const Text('Blood checkup complete'),
onTap: () {},
),
DataItem(
title: 'Colestrol',
subtitle: const Text('Blood checkup complete'),
onTap: () {},
),
],
actions: [
ActionButton(
onPressed: () {},
label: 'Add',
icon: const Icon(Icons.add),
showForward: true,
),
ActionButton(
onPressed: () {},
label: 'Search',
icon: const Icon(Icons.search),
showForward: true,
),
ActionButton(
onPressed: () {},
label: 'Refresh',
icon: const Icon(Icons.refresh),
showForward: true,
),
ActionButton(
onPressed: () {},
label: 'Categories',
icon: const Icon(Icons.category),
),
ActionButton(
onPressed: () {},
label: 'Type',
icon: const Icon(Icons.type_specimen),
),
],
summaries: const [
Summary(
value: '150',
label: 'Total',
),
Summary(
value: '100',
label: 'Added',
),
Summary(
value: '50',
label: 'Updated',
),
],
),
),
),
),
),
);
}
}
代码解释
-
导入必要的库:
import 'package:devaloop_data_list_view/data_list_view.dart'; import 'package:flutter/material.dart'; -
定义主应用类
MyApp:class MyApp extends StatelessWidget { const MyApp({super.key}); @override Widget build(BuildContext context) { return MaterialApp( title: 'Data List View', debugShowCheckedModeBanner: false, theme: ThemeData( colorScheme: ColorScheme.fromSeed(seedColor: Colors.blue.shade900), useMaterial3: true, ), home: Scaffold( body: Container( color: Colors.grey.shade100, child: Card( elevation: 0, color: Colors.white, margin: const EdgeInsets.all(15), child: Padding( padding: const EdgeInsets.symmetric(horizontal: 15), child: DataListView( title: 'Clinical Checkups', dataItems: [ // 数据项列表 DataItem( title: 'Blood Complete', subtitle: const Text('Blood check up complete'), onTap: () {}, ), // 更多数据项... ], actions: [ // 操作按钮列表 ActionButton( onPressed: () {}, label: 'Add', icon: const Icon(Icons.add), showForward: true, ), // 更多操作按钮... ], summaries: const [ // 摘要信息 Summary( value: '150', label: 'Total', ), // 更多摘要信息... ], ), ), ), ), ), ); } }
更多关于Flutter数据列表展示插件devaloop_data_list_view的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html
1 回复
更多关于Flutter数据列表展示插件devaloop_data_list_view的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
devaloop_data_list_view 是一个用于在 Flutter 应用中展示数据列表的插件。它提供了灵活的方式来显示大量数据，并且支持分页、加载更多、下拉刷新等功能。以下是如何使用 devaloop_data_list_view 的基本步骤：
1. 添加依赖
首先，你需要在 pubspec.yaml 文件中添加 devaloop_data_list_view 的依赖：
dependencies:
flutter:
sdk: flutter
devaloop_data_list_view: ^1.0.0 # 请使用最新版本
然后运行 flutter pub get 来安装依赖。
2. 导入包
在需要使用 devaloop_data_list_view 的 Dart 文件中导入包：
import 'package:devaloop_data_list_view/devaloop_data_list_view.dart';
3. 使用 DataListView
DataListView 是 devaloop_data_list_view 的核心组件，你可以通过它来展示数据列表。以下是一个简单的示例：
import 'package:flutter/material.dart';
import 'package:devaloop_data_list_view/devaloop_data_list_view.dart';
class MyDataListView extends StatefulWidget {
@override
_MyDataListViewState createState() => _MyDataListViewState();
}
class _MyDataListViewState extends State<MyDataListView> {
List<String> data = [];
bool isLoading = false;
bool hasMore = true;
@override
void initState() {
super.initState();
_loadMoreData();
}
Future<void> _loadMoreData() async {
if (isLoading || !hasMore) return;
setState(() {
isLoading = true;
});
// 模拟网络请求
await Future.delayed(Duration(seconds: 2));
List<String> newData = List.generate(20, (index) => 'Item ${data.length + index}');
setState(() {
data.addAll(newData);
isLoading = false;
hasMore = data.length < 100; // 假设最多加载100条数据
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Data List View Example'),
),
body: DataListView(
itemCount: data.length,
itemBuilder: (context, index) {
return ListTile(
title: Text(data[index]),
);
},
onLoadMore: _loadMoreData,
hasMore: hasMore,
isLoading: isLoading,
),
);
}
}
void main() {
runApp(MaterialApp(
home: MyDataListView(),
));
}
4. 参数说明
itemCount: 数据列表的总长度。itemBuilder: 用于构建每个列表项的构建器。onLoadMore: 当用户滚动到底部时触发的回调函数，用于加载更多数据。hasMore: 是否还有更多数据可以加载。isLoading: 是否正在加载数据。
5. 自定义样式
你可以通过 DataListView 的其他参数来自定义列表的样式，例如设置加载中的指示器、空视图等。
DataListView(
itemCount: data.length,
itemBuilder: (context, index) {
return ListTile(
title: Text(data[index]),
);
},
onLoadMore: _loadMoreData,
hasMore: hasMore,
isLoading: isLoading,
loadingIndicator: CircularProgressIndicator(), // 自定义加载指示器
emptyView: Center(child: Text('No data available')), // 自定义空视图
);
6. 其他功能
devaloop_data_list_view 还支持下拉刷新等功能。你可以通过 pullToRefresh 参数来启用下拉刷新：
DataListView(
itemCount: data.length,
itemBuilder: (context, index) {
return ListTile(
title: Text(data[index]),
);
},
onLoadMore: _loadMoreData,
hasMore: hasMore,
isLoading: isLoading,
pullToRefresh: true,
onRefresh: () async {
// 刷新数据
setState(() {
data.clear();
hasMore = true;
});
await _loadMoreData();
},
);