Flutter单位转换插件dart_unit_converter的使用

安装

在 pubspec.yaml 文件中添加以下依赖：

dependencies:
  dart_unit_converter: ^0.0.3 + 1

然后运行 flutter pub get 来安装依赖。

导入

在需要使用的文件中导入插件：

import 'package:dart_unit_converter/dart_unit_converter.dart';

使用方法

数据转换

示例代码

// 从扩展方法获取转换结果
dataValueController.text = parsedDataValue.convertDataToString(); // 从整数转换为字符串

// 从函数获取转换结果
dataValueController.text = converter.continousDataConvert(parsedDataValue);  // 从整数转换

// 自定义转换
final converter = DataConverter();

dataValueController.text = converter
    .convert(parsedDataValue, TypeDataConvert.bit, TypeDataConvert.megaByte)
    .toString();

时间转换

示例代码

import 'package:intl/date_symbol_data_local.dart';
import 'package:dart_unit_converter/dart_unit_converter.dart';

void main() {
  runApp(const MyApp());
  initializeDateFormatting();
  setDefaultMessage(MessageLocalType.id); // 默认语言设置为印尼
}

void useConverterFromSeconds() {
  final parsedTimeValue = timeInputController.text;
  timeValueController.text = parsedTimeValue.toStringTimeDiff(); // 从字符串扩展转换

  final dateTime = DateTime.parse(parsedTimeValue);
  timeValueController.text = dateTime.toStringTimeDiff(); // 从 DateTime 扩展转换
}

示例演示

以下是完整的示例代码，展示如何使用 dart_unit_converter 插件进行数据和时间转换。

示例代码

// ignore_for_file: avoid_print, depend_on_referenced_packages

import 'package:dart_unit_converter/dart_unit_converter.dart';
import 'package:flutter/material.dart';
import 'package:intl/date_symbol_data_local.dart' as date_local_symbol;

void main() {
  runApp(const MyApp());
}

class MyApp extends StatelessWidget {
  const MyApp({Key? key}) : super(key: key);

  [@override](/user/override)
  Widget build(BuildContext context) {
    return MaterialApp(
      title: '示例数据转换应用',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: const HomePage(),
    );
  }
}

class HomePage extends StatefulWidget {
  const HomePage({Key? key}) : super(key: key);

  [@override](/user/override)
  State<HomePage> createState() => _HomePageState();
}

class _HomePageState extends State<HomePage> {
  final converter = DataConverter();
  final dataInputController = TextEditingController();
  final dataValueController = TextEditingController();
  final timeInputController = TextEditingController();
  final timeValueController = TextEditingController();

  /// 示例数据转换器 -- [parsedDataValue]
  void useConverterFromByte() {
    final parsedDataValue = int.parse(dataInputController.text);

    // 从扩展方法获取转换结果
    dataValueController.text = parsedDataValue.convertDataToString();

    // 从函数获取转换结果
    dataValueController.text = converter.continousDataConvert(parsedDataValue);

    // 自定义转换
    dataValueController.text = converter
        .convert(parsedDataValue, TypeDataConvert.bit, TypeDataConvert.megaByte)
        .toString();
  }

  /// 示例时间转换器 -- [parsedTimeValue]
  void useConverterFromSeconds() {
    final parsedTimeValue = timeInputController.text;
    timeValueController.text = parsedTimeValue.toStringTimeDiff();
  }

  [@override](/user/override)
  void initState() {
    super.initState();
    date_local_symbol.initializeDateFormatting();
    timeInputController.text = '2022-08-22 20:18:04Z';
    setDefaultMessage(MessageLocalType.id);
  }

  [@override](/user/override)
  Widget build(BuildContext context) {
    return Scaffold(
      appBar: AppBar(
        title: const Text('示例应用'),
      ),
      body: SingleChildScrollView(
        child: Padding(
          padding: const EdgeInsets.all(18.0),
          child: Column(
            crossAxisAlignment: CrossAxisAlignment.stretch,
            children: [
              byteToStringSection(),
              const SizedBox(height: 50),
              timeConvertSection(),
            ],
          ),
        ),
      ),
    );
  }

  // 时间转换示例
  Widget timeConvertSection() {
    return Column(
      children: [
        const SizedBox(height: 24),
        const Text(
          '从 DateTime 转换到自定义字符串',
          textAlign: TextAlign.justify,
          style: TextStyle(
            fontSize: 16,
          ),
        ),
        Row(
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            Expanded(
              flex: 2,
              child: TextFormField(
                textAlign: TextAlign.center,
                controller: timeInputController,
              ),
            ),
          ],
        ),
        const Padding(
          padding: EdgeInsets.fromLTRB(10, 20, 10, 0),
          child: Text('是'),
        ),
        TextFormField(
          controller: timeValueController,
          textAlign: TextAlign.center,
          enabled: false,
        ),
        const SizedBox(height: 10),
        ElevatedButton(
          onPressed: useConverterFromSeconds,
          child: const Text('转换'),
        ),
      ],
    );
  }

  /// 数据转换示例 [converter]
  Widget byteToStringSection() {
    return Column(
      children: [
        const SizedBox(height: 24),
        const Text(
          '从字节值转换为字符串',
          textAlign: TextAlign.center,
          style: TextStyle(
            fontSize: 16,
          ),
        ),
        Row(
          crossAxisAlignment: CrossAxisAlignment.center,
          children: [
            Expanded(
              flex: 2,
              child: TextFormField(
                controller: dataInputController,
                keyboardType: TextInputType.number,
                onChanged: (value) {
                  if (value != '') {
                    useConverterFromByte();
                  } else {
                    dataValueController.text = '';
                  }
                },
              ),
            ),
            const Padding(
              padding: EdgeInsets.fromLTRB(10, 20, 10, 0),
              child: Text('='),
            ),
            Expanded(
              flex: 1,
              child: TextFormField(
                controller: dataValueController,
                keyboardType: TextInputType.number,
                textAlign: TextAlign.center,
                enabled: false,
              ),
            ),
          ],
        )
      ],
    );
  }
}