flutter_inapp_purchase 0.1.0

In App Purchase plugin for flutter.

flutter_inapp

In App Purchase plugin for flutter. This project has been forked from react-native-iap. We are trying to have same experience of in-app-purchase in flutter as in react-native. Since dooboolab is working alone currently, need much improvement with the testing and maintenance. We will keep working on it as time goes by just like we did in react-native-iap. PR is always welcomed.

Getting Started

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

For help on editing plugin code, view the documentation.

Methods

Func	Param	Return	Description
prepare		String	Prepare IAP module. Must be called on Android before any other purchase flow methods. In ios, it will simply call canMakePayments method and return value.
getProducts	List<String> Product IDs/skus	List<IAPItem>	Get a list of products (consumable and non-consumable items, but not subscriptions). Note: On iOS versions earlier than 11.2 this method will return subscriptions if they are included in your list of SKUs. This is because we cannot differentiate between IAP products and subscriptions prior to 11.2.
getSubscriptions	List<String> Subscription IDs/skus	List<IAPItem>	Get a list of subscriptions. Note: On iOS this method has the same output as getProducts. Because iOS does not differentiate between IAP products and subscriptions.
getPurchaseHistory		List<IAPItem>	Gets an invetory of purchases made by the user regardless of consumption status (where possible)
getAvailablePurchases		List<IAPItem>	Get all purchases made by the user (either non-consumable, or haven't been consumed yet)
buySubscription	string Subscription ID/sku, string Old Subscription ID/sku (on Android)	json	Create (buy) a subscription to a sku. For upgrading/downgrading subscription on Android pass second parameter with current subscription ID, on iOS this is handled automatically by store.
buyProduct	string Product ID/sku	json	Buy a product
buyProductWithoutFinishTransaction	string Product ID/sku	json	Buy a product without finish transaction call (iOS only)
finishTransaction	void	String	Send finishTransaction call to Apple IAP server. Call this function after receipt validation process
consumePurchase	String Purchase token	String	Consume a product (on Android.) No-op on iOS.
endConnection		String	End billing connection (on Android.) No-op on iOS.

Install

Add flutter_iap as a dependency in pubspec.yaml

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

Configuring in app purchase

• Please refer to Blog.

Example

Below code is just a cp from example project. You can test this in real example project.

import 'package:flutter/material.dart';
import 'dart:async';
import 'dart:io';

import 'package:flutter/services.dart';
import 'package:flutter_inapp/flutter_inapp.dart';

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

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

class _MyAppState extends State<MyApp> {
  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 = [];

  @override
  void initState() {
    super.initState();
    initPlatformState();
  }

  // Platform messages are asynchronous, so we initialize in an async method.
  Future<void> initPlatformState() async {
    String platformVersion;
    // Platform messages may fail, so we use a try/catch PlatformException.
    try {
      platformVersion = await FlutterInapp.platformVersion;
    } on PlatformException {
      platformVersion = 'Failed to get platform version.';
    }

    // prepare
    var result = await FlutterInapp.prepare;
    print ('result: $result');

    // If the widget was removed from the tree while the asynchronous platform
    // message was in flight, we want to discard the reply rather than calling
    // setState to update our non-existent appearance.
    if (!mounted) return;

    setState(() {
      _platformVersion = platformVersion;
    });
  }

  Future<Null> _buyProduct(IAPItem item) async {
    try {
      var bought = await FlutterInapp.buyProduct(item.productId);
      print('bought - ${bought.toString()}');
    } catch (error) {
      print('$error');
    }

  }

  Future<Null> _getProduct() async {
    List<IAPItem> items = await FlutterInapp.getProducts(_productLists);
    for (var item in items) {
      print('${item.toString()}');
      this._items.add(item);
    }

    setState(() {
      this._items = items;
    });
  }

  _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,
                ),
              ),
            ),
            FlatButton(
              color: Colors.orange,
              onPressed: () {
                this._buyProduct(item);
              },
              child: Row(
                children: <Widget>[
                  Expanded(
                    child: Container(
                      height: 48.0,
                      alignment: Alignment(-1.0, 0.0),
                      child: Text('Buy Item'),
                    ),
                  ),
                ],
              ),
            ),
          ],
        ),
      ),
    )).toList();
    return widgets;
  }

  @override
  Widget build(BuildContext context) {
    return MaterialApp(
      home: Scaffold(
        appBar: AppBar(
          title: const Text('Flutter Inapp Plugin by dooboolab'),
        ),
        body:
          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
                        ),
                      ),
                    ),
                    Container(
                      height: 60.0,
                      margin: EdgeInsets.only(bottom: 10.0),
                      child: ListView(
                        scrollDirection: Axis.horizontal,
                        children: <Widget>[
                          Row(
                            children: <Widget>[
                              Container(
                                margin: EdgeInsets.symmetric(horizontal: 15.0),
                                child: FlatButton(
                                  color: Colors.green,
                                  padding: EdgeInsets.all(0.0),
                                  onPressed: () async {
                                    await FlutterInapp.prepare;
                                  },
                                  child: Container(
                                    padding: EdgeInsets.symmetric(horizontal: 20.0),
                                    alignment: Alignment(0.0, 0.0),
                                    child: Text(
                                      'Connect Billing',
                                      style: TextStyle(
                                        fontSize: 16.0,
                                      ),
                                    ),
                                  ),
                                ),
                              ),
                              FlatButton(
                                color: Colors.green,
                                padding: EdgeInsets.all(0.0),
                                onPressed: () {
                                  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(
                                margin: EdgeInsets.only(left: 15.0),
                                child: FlatButton(
                                  color: Colors.green,
                                  padding: EdgeInsets.all(0.0),
                                  onPressed: () async {
                                    await FlutterInapp.endConnection;
                                    setState(() {
                                      this._items = [];
                                    });
                                  },
                                  child: Container(
                                    padding: EdgeInsets.symmetric(horizontal: 20.0),
                                    alignment: Alignment(0.0, 0.0),
                                    child: Text(
                                      'End Connection',
                                      style: TextStyle(
                                        fontSize: 16.0,
                                      ),
                                    ),
                                  ),
                                ),
                              ),
                            ],
                          ),
                        ],
                      ),
                    ),
                    Column(
                      children: this._renderInapps(),
                    ),
                  ],
                ),
              ],
            ),
          ),
      ),
    );
  }
}