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Awesome Open Source

flutter_iap

Add In-App Payments to your Flutter app with this plugin.

  • You can retrieve a list of previously purchased IAP product IDs (only Android)
  • You can fetch IAP products from Google Play and App Store
  • You can buy an IAP product
  • You can consume a IAP product (only Android)
  • You can restore purchases from App Store (only iOS)

Getting Started

For help getting started with Flutter, view our online documentation.

For help on editing plugin code, view the documentation.

Install

Add flutter_iap as a dependency in pubspec.yaml

For help on adding as a dependency, view the documentation.

Example

Note: You must set up billing information in your developer account corresponding with the platform you are testing (iTunes Connect / Google Play Console)

import 'package:flutter/material.dart';
import 'package:flutter_iap/flutter_iap.dart';

void main() => runApp(MyApp());

class MyApp extends StatefulWidget {
  @override
  _MyAppState createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {
  List<String> _productIds = [];
  List<String> _alreadyPurchased = [];

  @override
  initState() {
    super.initState();
    init();
  }

  init() async {
    // Android testers: You can use "android.test.purchased" to simulate a successful flow.
    List<String> productIds = ["com.example.testiap"];

    IAPResponse products = await FlutterIap.fetchProducts(productIds);
    if (products.status != IAPResponseStatus.ok) {
      print("Products not retrieved, error: ${products.status}");
      return;
    }

    IAPResponse purchased = await FlutterIap.fetchInventory();
    if (purchased.status != IAPResponseStatus.ok) {
      print("Inventory not retrieved, error: ${purchased.status}");
      return;
    }

    productIds = products.products
        .map((IAPProduct product) => product.productIdentifier)
        .toList();

    List<String> purchasedIds = purchased.purchases
        .map((IAPPurchase purchase) => purchase.productIdentifier)
        .toList();

    if (!mounted) return;

    setState(() {
      _productIds = productIds;
      _alreadyPurchased = purchasedIds;
    });
  }

  @override
  Widget build(BuildContext context) {
    String nextPurchase = _productIds.firstWhere(
      (id) => !_alreadyPurchased.contains(id),
      orElse: () => null,
    );

    List<Text> list = [];
    _alreadyPurchased.forEach((productId) {
      list.add(Text(productId));
    });

    if (list.isEmpty) {
      list.add(Text("No previous purchases found."));
    } else {
      list.insert(0, Text("Already purchased:"));
    }

    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: Text("flutter_iap example app"),
        ),
        body: Center(
          child: Column(
            mainAxisSize: MainAxisSize.min,
            children: <Widget>[
              Text(
                _productIds.isNotEmpty
                    ? "Available Products to purchase: $_productIds"
                    : "Not working?\n"
                    "Check that you set up in app purchases in\n"
                    "iTunes Connect / Google Play Console",
                textAlign: TextAlign.center,
                textScaleFactor: 1.25,
              ),
              SizedBox(height: 24.0),
            ].followedBy(list).toList(),
          ),
        ),
        floatingActionButton: nextPurchase != null
            ? FloatingActionButton(
                child: Icon(Icons.monetization_on),
                onPressed: () async {
                  IAPResponse response = await FlutterIap.buy(nextPurchase);
                  if (response.purchases != null) {
                    List<String> purchasedIds = response.purchases
                        .map((IAPPurchase purchase) =>
                            purchase.productIdentifier)
                        .toList();

                    setState(() {
                      _alreadyPurchased = purchasedIds;
                    });
                  }
                },
              )
            : Container(),
      ),
    );
  }
}

Contributing

This project welcomes PRs to fix issues and improve functionality.

To get started, clone the git repository to a local directory (flutter_iap), and run:

$ flutter create --template=plugin --ios-language=swift .

You can then use flutter run as usual in the example directory to get started.


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