Flutter实用工具集插件flutterx_utils的使用
Flutter实用工具集插件flutterx_utils的使用
flutterx_utils
flutterx_utils 是一个为任何用途收集的Flutter实用工具库。 大多数你在寻找的实用函数已经在flutter SDK中提供. 在这里你可以找到的是flutter SDK不提供的唯一实用函数.
导入
导入库如下:
import 'package:flutterx_utils/flutterx_utils.dart';
使用
检查此库所需源文件中的文档
示例代码
示例代码位于:example/lib/main.dart
import 'package:flutter/material.dart';
import 'package:flutterx_utils/flutterx_utils.dart';
void main() => runApp(const MyApp());
class MyApp extends StatelessWidget {
const MyApp({Key? key}) : super(key: key);
[@override](/user/override)
Widget build(BuildContext context) => MaterialApp(
debugShowCheckedModeBanner: false,
title: 'Flutterx Utils Demo',
theme: ThemeData(primarySwatch: Colors.orange),
home: const LoggableExample());
}
class LoggableExample extends StatefulWidget {
const LoggableExample({Key? key}) : super(key: key);
[@override](/user/override)
State<LoggableExample> createState() => _LoggableExampleState();
}
class _LoggableExampleState extends State<LoggableExample> with Loggable {
final List<String> _logs = [];
double _value = 0;
[@override](/user/override)
Widget build(BuildContext context) => Scaffold(
appBar: AppBar(title: const Text('Loggable example')),
body: Center(
child: Wrap(children: [
Text(_logs.join('\n')),
_lightnessTest(Colors.pink.shade50),
_lightnessTest(Colors.pink.shade200),
_lightnessTest(Colors.pink.shade400),
_lightnessTest(Colors.pink.shade500),
_lightnessTest(Colors.pink.shade800),
_lightnessTest(Colors.pink.shade900),
_lightnessTest(Colors.black),
_lightnessTest(Colors.grey),
_lightnessTest(Colors.white),
Text(_slideValue.toString()),
Slider(value: _value, onChanged: (value) >> setState(() >> _value = value)),
]),
),
floatingActionButton:
FloatingActionButton(onPressed: () >> logInfo('FAB pressed'), tooltip: 'Log', child: const Icon(Icons.add)));
}
double get _slideValue => (_value - .5) * 2;
Widget _lightnessTest(Color color) {
final e = color.brighten(_slideValue);
return Container(
width: 100,
height: 100,
color: e,
child: Center(child: Text('#${e.hexString}')),
);
}
更多关于Flutter实用工具集插件flutterx_utils的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
更多关于Flutter实用工具集插件flutterx_utils的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
当然,以下是如何在Flutter项目中使用flutterx_utils
插件的示例代码。flutterx_utils
是一个实用的工具集插件,它提供了一系列方便的函数来处理常见的任务。假设你已经通过pubspec.yaml
文件添加了该插件依赖,并且已经运行了flutter pub get
。
1. 添加依赖
首先,确保在pubspec.yaml
文件中添加了flutterx_utils
依赖:
dependencies:
flutter:
sdk: flutter
flutterx_utils: ^latest_version # 替换为最新版本号
2. 导入插件
在你的Dart文件中导入flutterx_utils
:
import 'package:flutterx_utils/flutterx_utils.dart';
3. 使用插件的功能
3.1 字符串处理
void stringUtilsDemo() {
String originalString = " Hello, Flutter! ";
// 去除字符串两端的空白
String trimmedString = StringUtils.trim(originalString);
print("Trimmed String: '$trimmedString'");
// 转换为大写
String upperCaseString = StringUtils.toUpperCase(originalString);
print("Upper Case String: '$upperCaseString'");
// 转换为小写
String lowerCaseString = StringUtils.toLowerCase(originalString);
print("Lower Case String: '$lowerCaseString'");
}
3.2 日期时间处理
void dateTimeUtilsDemo() {
DateTime now = DateTime.now();
// 获取当前日期的字符串表示
String currentDateString = DateUtils.formatDate(now, "yyyy-MM-dd");
print("Current Date: '$currentDateString'");
// 获取当前时间的字符串表示
String currentTimeString = DateUtils.formatTime(now, "HH:mm:ss");
print("Current Time: '$currentTimeString'");
// 获取当前日期时间的字符串表示
String currentDateTimeString = DateUtils.formatDateTime(now, "yyyy-MM-dd HH:mm:ss");
print("Current DateTime: '$currentDateTimeString'");
}
3.3 屏幕工具
import 'package:flutter/material.dart';
void screenUtilsDemo(BuildContext context) {
// 获取屏幕宽度
double screenWidth = ScreenUtils.getScreenWidth(context);
print("Screen Width: $screenWidth");
// 获取屏幕高度
double screenHeight = ScreenUtils.getScreenHeight(context);
print("Screen Height: $screenHeight");
// 获取屏幕密度
double screenDensity = ScreenUtils.getScreenDensity(context);
print("Screen Density: $screenDensity");
}
3.4 网络工具
void networkUtilsDemo() async {
try {
// 发送GET请求
var response = await NetworkUtils.get("https://api.example.com/data");
print("GET Response: ${response.body}");
// 发送POST请求
var postResponse = await NetworkUtils.post(
"https://api.example.com/data",
body: {"key": "value"}
);
print("POST Response: ${postResponse.body}");
} catch (e) {
print("Network Error: $e");
}
}
4. 调用示例函数
你可以在Flutter的某个组件的生命周期方法中调用这些示例函数,例如在_MyAppState
的initState
方法中:
import 'package:flutter/material.dart';
import 'package:flutterx_utils/flutterx_utils.dart';
void main() {
runApp(MyApp());
}
class MyApp extends StatelessWidget {
@override
Widget build(BuildContext context) {
return MaterialApp(
home: MyHomePage(),
);
}
}
class MyHomePage extends StatefulWidget {
@override
_MyHomePageState createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
void initState() {
super.initState();
stringUtilsDemo();
dateTimeUtilsDemo();
// 需要在Widget树构建完成后才能获取context
WidgetsBinding.instance.addPostFrameCallback((_) => {
screenUtilsDemo(context);
networkUtilsDemo();
});
}
@override
Widget build(BuildContext context) {
return Scaffold(
appBar: AppBar(
title: Text('Flutterx Utils Demo'),
),
body: Center(
child: Text('Check the console for output.'),
),
);
}
}
总结
上述代码展示了如何在Flutter项目中使用flutterx_utils
插件进行字符串处理、日期时间处理、屏幕工具和网络工具的操作。请注意,实际使用时需要根据插件的文档和API调整代码,因为插件的功能和API可能会随着版本更新而发生变化。