Flutter实用工具集插件flutterx_utils的使用

发布于 1周前 作者 h691938207 来自 Flutter

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) =&gt 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

1 回复

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_MyAppStateinitState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。

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