Flutter应用内购买插件fgx_in_app_purchase的使用
Flutter应用内购买插件fgx_in_app_purchase的使用
在本教程中，我们将学习如何在Flutter应用中使用fgx_in_app_purchase插件来实现应用内购买功能。该插件允许开发者轻松地集成应用内购买到他们的Flutter应用中。
示例代码
以下是一个完整的示例，展示了如何使用fgx_in_app_purchase插件进行应用内购买。
import 'package:flutter/material.dart';
import 'dart:async';
import 'dart:io';
import 'package:flutter/services.dart';
import 'package:fgx_in_app_purchase/flutter_inapp_purchase.dart';
void main() => runApp(new MyApp());
class MyApp extends StatelessWidget {
[@override](/user/override)
Widget build(BuildContext context) {
return MaterialApp(
title: 'Flutter Demo',
home: Scaffold(
appBar: AppBar(
title: Text('Flutter Inapp Plugin by dooboolab'),
),
body: InApp()),
);
}
}
class InApp extends StatefulWidget {
[@override](/user/override)
_InAppState createState() => new _InAppState();
}
class _InAppState extends State<InApp> {
StreamSubscription? _purchaseUpdatedSubscription;
StreamSubscription? _purchaseErrorSubscription;
StreamSubscription? _conectionSubscription;
final List<String> _productLists = Platform.isAndroid
? [
'android.test.purchased',
'point_1000',
'5000_point',
'android.test.canceled',
]
: ['com.cooni.point1000', 'com.cooni.point5000'];
String _platformVersion = 'Unknown';
List<IAPItem> _items = [];
List<PurchasedItem> _purchases = [];
[@override](/user/override)
void initState() {
super.initState();
initPlatformState();
}
[@override](/user/override)
void dispose() {
if (_conectionSubscription != null) {
_conectionSubscription?.cancel();
_conectionSubscription = null;
}
super.dispose();
}
// 初始化平台状态
Future<void> initPlatformState() async {
String? platformVersion;
// 平台消息可能失败，因此我们使用try/catch处理PlatformException
try {
platformVersion = await FlutterInappPurchase.instance.platformVersion;
} on PlatformException {
platformVersion = 'Failed to get platform version.';
}
// 准备初始化
var result = await FlutterInappPurchase.instance.initialize();
print('result: $result');
// 如果小部件从树中被移除，那么在异步平台消息完成之前，我们应该丢弃回复而不是调用setState
if (!mounted) return;
setState(() {
_platformVersion = platformVersion ?? "未知";
});
// 刷新Android的商品列表
try {
String msg = await FlutterInappPurchase.instance.consumeAll();
print('consumeAllItems: $msg');
} catch (err) {
print('consumeAllItems error: $err');
}
_conectionSubscription =
FlutterInappPurchase.connectionUpdated.listen((connected) {
print('connected: $connected');
});
_purchaseUpdatedSubscription =
FlutterInappPurchase.purchaseUpdated.listen((productItem) {
print('purchase-updated: $productItem');
});
_purchaseErrorSubscription =
FlutterInappPurchase.purchaseError.listen((purchaseError) {
print('purchase-error: $purchaseError');
});
}
// 请求购买
void _requestPurchase(IAPItem item) {
FlutterInappPurchase.instance.requestPurchase(item.productId!);
}
// 获取商品信息
Future _getProduct() async {
List<IAPItem> items =
await FlutterInappPurchase.instance.getProducts(_productLists);
for (var item in items) {
print('${item.toString()}');
this._items.add(item);
}
setState(() {
this._items = items;
this._purchases = [];
});
}
// 获取购买记录
Future _getPurchases() async {
List<PurchasedItem>? items =
await FlutterInappPurchase.instance.getAvailablePurchases();
for (var item in items ?? []) {
print('${item.toString()}');
this._purchases.add(item);
}
setState(() {
this._items = [];
this._purchases = items ?? [];
});
}
// 获取购买历史
Future _getPurchaseHistory() async {
List<PurchasedItem>? items =
await FlutterInappPurchase.instance.getPurchaseHistory();
for (var item in items ?? []) {
print('${item.toString()}');
this._purchases.add(item);
}
setState(() {
this._items = [];
this._purchases = items ?? [];
});
}
// 渲染商品列表
List<Widget> _renderInApps() {
List<Widget> widgets = this
._items
.map((item) => Container(
margin: EdgeInsets.symmetric(vertical: 10.0),
child: Container(
child: Column(
children: <Widget>[
Container(
margin: EdgeInsets.only(bottom: 5.0),
child: Text(
item.toString(),
style: TextStyle(
fontSize: 18.0,
color: Colors.black,
),
),
),
TextButton(
// color: Colors.orange,
onPressed: () {
print("---------- Buy Item Button Pressed");
this._requestPurchase(item);
},
child: Container(
color: Colors.orange,
child: Row(
children: <Widget>[
Expanded(
child: Container(
height: 48.0,
alignment: Alignment(-1.0, 0.0),
child: Text('Buy Item'),
),
),
],
),
),
),
],
),
),
))
.toList();
return widgets;
}
// 渲染购买记录列表
List<Widget> _renderPurchases() {
List<Widget> widgets = this
._purchases
.map((item) => Container(
margin: EdgeInsets.symmetric(vertical: 10.0),
child: Container(
child: Column(
children: <Widget>[
Container(
margin: EdgeInsets.only(bottom: 5.0),
child: Text(
item.toString(),
style: TextStyle(
fontSize: 18.0,
color: Colors.black,
),
),
)
],
),
),
))
.toList();
return widgets;
}
[@override](/user/override)
Widget build(BuildContext context) {
double screenWidth = MediaQuery.of(context).size.width - 20;
double buttonWidth = (screenWidth / 3) - 20;
return Container(
padding: EdgeInsets.all(10.0),
child: ListView(
children: <Widget>[
Column(
crossAxisAlignment: CrossAxisAlignment.start,
mainAxisAlignment: MainAxisAlignment.start,
children: <Widget>[
Container(
child: Text(
'Running on: $_platformVersion\n',
style: TextStyle(fontSize: 18.0),
),
),
Column(
children: <Widget>[
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Container(
width: buttonWidth,
height: 60.0,
margin: EdgeInsets.all(7.0),
child: Container(
color: Colors.amber,
padding: EdgeInsets.all(0.0),
child: TextButton(
onPressed: () async {
print(
"---------- Connect Billing Button Pressed");
await FlutterInappPurchase.instance.initialize();
},
child: Container(
padding: EdgeInsets.symmetric(horizontal: 20.0),
alignment: Alignment(0.0, 0.0),
child: Text(
'Connect Billing',
style: TextStyle(
fontSize: 16.0,
),
),
),
),
),
),
Container(
width: buttonWidth,
height: 60.0,
margin: EdgeInsets.all(7.0),
child: Container(
color: Colors.amber,
padding: EdgeInsets.all(0.0),
child: TextButton(
onPressed: () async {
print("---------- End Connection Button Pressed");
await FlutterInappPurchase.instance.finalize();
if (_purchaseUpdatedSubscription != null) {
_purchaseUpdatedSubscription?.cancel();
_purchaseUpdatedSubscription = null;
}
if (_purchaseErrorSubscription != null) {
_purchaseErrorSubscription?.cancel();
_purchaseErrorSubscription = null;
}
setState(() {
this._items = [];
this._purchases = [];
});
},
child: Container(
padding: EdgeInsets.symmetric(horizontal: 20.0),
alignment: Alignment(0.0, 0.0),
child: Text(
'End Connection',
style: TextStyle(
fontSize: 16.0,
),
),
),
),
),
),
],
),
Row(
mainAxisAlignment: MainAxisAlignment.spaceEvenly,
children: <Widget>[
Container(
width: buttonWidth,
height: 60.0,
margin: EdgeInsets.all(7.0),
child: Container(
color: Colors.green,
padding: EdgeInsets.all(0.0),
child: TextButton(
onPressed: () {
print("---------- Get Items Button Pressed");
this._getProduct();
},
child: Container(
padding:
EdgeInsets.symmetric(horizontal: 20.0),
alignment: Alignment(0.0, 0.0),
child: Text(
'Get Items',
style: TextStyle(
fontSize: 16.0,
),
),
),
),
)),
Container(
width: buttonWidth,
height: 60.0,
margin: EdgeInsets.all(7.0),
child: Container(
color: Colors.green,
padding: EdgeInsets.all(0.0),
child: TextButton(
onPressed: () {
print(
"---------- Get Purchases Button Pressed");
this._getPurchases();
},
child: Container(
padding:
EdgeInsets.symmetric(horizontal: 20.0),
alignment: Alignment(0.0, 0.0),
child: Text(
'Get Purchases',
style: TextStyle(
fontSize: 16.0,
),
),
),
),
)),
Container(
width: buttonWidth,
height: 60.0,
margin: EdgeInsets.all(7.0),
child: Container(
color: Colors.green,
padding: EdgeInsets.all(0.0),
child: TextButton(
onPressed: () {
print(
"---------- Get Purchase History Button Pressed");
this._getPurchaseHistory();
},
child: Container(
padding:
EdgeInsets.symmetric(horizontal: 20.0),
alignment: Alignment(0.0, 0.0),
child: Text(
'Get Purchase History',
style: TextStyle(
fontSize: 16.0,
),
),
),
),
)),
]),
],
),
Column(
children: this._renderInApps(),
),
Column(
children: this._renderPurchases(),
),
],
),
],
),
);
}
}
更多关于Flutter应用内购买插件fgx_in_app_purchase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应用内购买插件fgx_in_app_purchase的使用的实战系列教程也可以访问 https://www.itying.com/category-92-b0.html
fgx_in_app_purchase 是一个用于在 Flutter 应用中实现应用内购买的插件。以下是如何使用该插件的基本步骤：
1. 添加依赖
首先，你需要在 pubspec.yaml 文件中添加 fgx_in_app_purchase 插件的依赖：
dependencies:
flutter:
sdk: flutter
fgx_in_app_purchase: ^latest_version
然后运行 flutter pub get 来安装依赖。
2. 初始化插件
在你的 Flutter 应用中，首先需要初始化 fgx_in_app_purchase 插件。通常，你可以在 main.dart 文件中的 main 函数中进行初始化：
import 'package:fgx_in_app_purchase/fgx_in_app_purchase.dart';
void main() async {
WidgetsFlutterBinding.ensureInitialized();
// 初始化插件
await FgxInAppPurchase.instance.initialize();
runApp(MyApp());
}
3. 配置应用内购买项
在 Google Play Console 或 Apple App Store Connect 中配置你的应用内购买项。确保你为每个购买项设置了正确的 ID。
4. 获取可购买的商品
你可以使用 getProducts 方法来获取可购买的商品列表：
List<String> productIds = ['com.example.product1', 'com.example.product2'];
List<ProductDetails> products = await FgxInAppPurchase.instance.getProducts(productIds);
for (ProductDetails product in products) {
print('Product ID: ${product.productId}');
print('Price: ${product.price}');
print('Title: ${product.title}');
print('Description: ${product.description}');
}
5. 发起购买
使用 buyProduct 方法来发起购买：
ProductDetails product = products.first; // 假设你要购买第一个商品
PurchaseDetails purchaseDetails = await FgxInAppPurchase.instance.buyProduct(product);
if (purchaseDetails.status == PurchaseStatus.purchased) {
print('Purchase successful!');
} else {
print('Purchase failed: ${purchaseDetails.status}');
}
6. 处理购买结果
你可以监听购买状态的变化，并根据不同的状态进行相应的处理：
FgxInAppPurchase.instance.purchaseStream.listen((purchaseDetails) {
switch (purchaseDetails.status) {
case PurchaseStatus.purchased:
// 处理购买成功的情况
break;
case PurchaseStatus.error:
// 处理购买失败的情况
break;
case PurchaseStatus.pending:
// 处理购买进行中的情况
break;
default:
break;
}
});
7. 恢复购买
如果你的应用支持恢复购买功能，可以使用 restorePurchases 方法来恢复用户的购买：
List<PurchaseDetails> restoredPurchases = await FgxInAppPurchase.instance.restorePurchases();
for (PurchaseDetails purchase in restoredPurchases) {
if (purchase.status == PurchaseStatus.restored) {
print('Restored purchase: ${purchase.productID}');
}
}
8. 处理订阅
如果你的应用内购买项是订阅，你可以使用 getSubscriptionStatus 方法来获取订阅状态：
String subscriptionId = 'com.example.subscription';
SubscriptionStatus status = await FgxInAppPurchase.instance.getSubscriptionStatus(subscriptionId);
print('Subscription status: ${status.status}');
9. 处理错误
在购买过程中可能会遇到各种错误，你可以通过捕获异常来处理这些错误：
try {
PurchaseDetails purchaseDetails = await FgxInAppPurchase.instance.buyProduct(product);
} catch (e) {
print('Error during purchase: $e');
}
10. 清理资源
在你的应用生命周期结束时，可以调用 dispose 方法来释放资源：
FgxInAppPurchase.instance.dispose();