Flutter货币转换插件geo_currencies的使用
Flutter货币转换插件geo_currencies的使用
GeoCurrencies
geo_currencies 是一个 Flutter 包，提供了获取货币信息的方法。所有货币转换数据每天更新一次。
特性
- 通过坐标获取货币数据：该库提供了方法以给定地理坐标获取货币数据。
- 格式化金额与货币符号：该库提供了方便的方法来格式化带有货币符号的金额。
- 使用货币进行金额转换：该库提供了方便的方法来转换金额，数据源从 EXCHANGE RATE API 文档 获取。
- 多语言支持：方法接受可选的
Locale参数，可以用来指定语言，默认语言为英语。
安装
在你的 pubspec.yaml 文件中添加以下依赖：
dependencies:
geo_currencies: ^0.0.5
使用
在 Dart 代码中导入包：
import 'package:geo_currencies/geo_currencies.dart';
GeoCurrencies 类实现为接口，具有工厂构造函数，根据可选的 GeoCurrenciesType 返回不同的实例，默认情况下 GeoCurrenciesType 为 live。
示例代码
以下是一个完整的示例代码，展示了如何使用 geo_currencies 插件进行货币转换。
import 'package:flutter/material.dart';
import 'package:geo_currencies/geo_currencies.dart';
void main() {
runApp(const MyApp());
}
class MyApp extends StatelessWidget {
const MyApp({super.key});
@override
Widget build(BuildContext context) {
return MaterialApp(
title: 'Geo Currencies Demo',
theme: ThemeData(
colorScheme: ColorScheme.fromSeed(seedColor: Colors.deepPurple),
useMaterial3: true,
),
home: const MyHomePage(title: 'Geo Currencies Home Page'),
);
}
}
class MyHomePage extends StatefulWidget {
const MyHomePage({super.key, required this.title});
final String title;
@override
State<MyHomePage> createState() => _MyHomePageState();
}
class _MyHomePageState extends State<MyHomePage> {
@override
Widget build(BuildContext context) {
final GeoCurrencies geoCurrencies = GeoCurrencies(
config: GeoCurrenciesConfig(
geoCurrenciesType: GeoCurrenciesType.live,
decimalDigits: 2,
decimalSeparator: '.',
includeSymbol: true,
symbolSeparator: ' ',
locale: const Locale('En', 'en'),
thousandSeparator: ','),
);
const TextStyle style1 = TextStyle(
color: Colors.black87, fontSize: 18, fontWeight: FontWeight.bold);
return Scaffold(
appBar: AppBar(
backgroundColor: Theme.of(context).colorScheme.inversePrimary,
centerTitle: true,
title: Text(
widget.title,
style: const TextStyle(color: Colors.black87),
),
),
body: SingleChildScrollView(
child: Center(
child: Column(
crossAxisAlignment: CrossAxisAlignment.center,
mainAxisAlignment: MainAxisAlignment.center,
children: [
const Text(
'Formats amount with currency symbol',
style: style1,
),
const SizedBox(
height: 10,
),
Text(
geoCurrencies.formatAmountWithCurrencySymbol(
amount: 10,
currencyCodeIso4217: 'XAF',
),
),
const SizedBox(
height: 40,
),
const Text(
'Formats amount with currency code',
style: style1,
),
const SizedBox(
height: 10,
),
Text(
geoCurrencies.formatAmountWithCurrencyCode(
amount: 1000,
currencyCodeIso4217: 'XAF',
),
),
const SizedBox(
height: 40,
),
const Text(
'Converts amount with rate',
style: style1,
),
const SizedBox(
height: 10,
),
Column(
children: [
Text(
'amountConverted: ${geoCurrencies.convertAmountWithRate(amount: 10, rate: 0.23, toCurrencyCodeIso4217: 'XAF').amountConverted}',
),
Text(
'baseAmount: ${geoCurrencies.convertAmountWithRate(amount: 10, rate: 0.23, toCurrencyCodeIso4217: 'XAF').baseAmount}',
),
Text(
'rate: ${geoCurrencies.convertAmountWithRate(amount: 10, rate: 0.23, toCurrencyCodeIso4217: 'XAF').rate}',
),
Text(
'formattedAmountConvertedWithCurrencyCode: ${geoCurrencies.convertAmountWithRate(amount: 10, rate: 0.23, toCurrencyCodeIso4217: 'XAF').formattedAmountConvertedWithCurrencyCode}',
),
Text(
'formattedAmountConvertedWithCurrencySymbol: ${geoCurrencies.convertAmountWithRate(amount: 10, rate: 0.23, toCurrencyCodeIso4217: 'XAF').formattedAmountConvertedWithCurrencySymbol}',
),
Text(
'toCurrencyCodeIso4217: ${geoCurrencies.convertAmountWithRate(amount: 10, rate: 0.23, toCurrencyCodeIso4217: 'XAF').toCurrencyCodeIso4217}',
),
],
),
const SizedBox(
height: 40,
),
const Text(
'Gets currency data by coordinate.',
style: style1,
),
const SizedBox(
height: 10,
),
FutureBuilder<CurrencyData?>(
future: geoCurrencies.getCurrencyDataByCoordinate(
latitude: 4.052851963460176,
longitude: 9.717363661147893,
),
builder: (context, snapshot) {
return Column(
children: [
Text(
'names: ${snapshot.data?.name}',
),
Text(
'countryName: ${snapshot.data?.countryName}',
),
Text(
'symbol: ${snapshot.data?.symbol}',
),
Text(
'codeIso4217: ${snapshot.data?.codeIso4217}',
),
],
);
}),
const SizedBox(
height: 40,
),
const Text(
'Converts amount with currencies codes.',
style: style1,
),
const SizedBox(
height: 10,
),
FutureBuilder<ConversionData?>(
future: geoCurrencies.convertAmountWithCurrenciesCodes(
amount: 10,
fromCurrencyCodeIso4217: 'EUR',
toCurrencyCodeIso4217: 'XAF',
),
builder: (context, snapshot) {
return Column(
children: [
Text(
'amountConverted: ${snapshot.data?.amountConverted}',
),
Text(
'baseAmount: ${snapshot.data?.baseAmount}',
),
Text(
'formattedAmountConvertedWithCurrencyCode: ${snapshot.data?.formattedAmountConvertedWithCurrencyCode}',
),
Text(
'formattedAmountConvertedWithCurrencySymbol: ${snapshot.data?.formattedAmountConvertedWithCurrencySymbol}',
),
Text(
'toCurrencyCodeIso4217: ${snapshot.data?.toCurrencyCodeIso4217}',
),
],
);
}),
const SizedBox(
height: 40,
),
const Text(
'Gets rate.',
style: style1,
),
const SizedBox(
height: 10,
),
FutureBuilder<RateData?>(
future: geoCurrencies.getRate(
fromCurrencyCodeIso4217: 'EUR',
toCurrencyCodeIso4217: 'XAF',
),
builder: (context, snapshot) {
return Column(
children: [
Text(
'fromCurrencyCodeIso4217: ${snapshot.data?.fromCurrencyCodeIso4217}',
),
Text(
'rate: ${snapshot.data?.rate}',
),
Text(
'toCurrencyCodeIso4217: ${snapshot.data?.toCurrencyCodeIso4217}',
),
],
);
}),
],
),
),
),
);
}
}
依赖项
在 pubspec.yaml 文件中添加以下依赖项：
dependencies:
http: ^1.1.0
intl: ^0.19.1
logging: ^1.0.2
更多关于Flutter货币转换插件geo_currencies的使用的实战教程也可以访问 https://www.itying.com/category-92-b0.html
