onepref 0.0.8

A package you can use to implement in app purchases easily and work with sharePrefences, other useful widgets to make your development easily.

example/lib/main.dart

import 'package:example/utils/constants.dart';
import 'package:flutter/material.dart';
import 'dart:io';

// ignore: depend_on_referenced_packages
import 'package:in_app_purchase/in_app_purchase.dart';
import 'package:in_app_purchase_android/in_app_purchase_android.dart';

import 'package:onepref/onepref.dart';

void main() async {
  WidgetsFlutterBinding.ensureInitialized();
  await OnePref.init();
  runApp(const MyApp());
}

class MyApp extends StatefulWidget {
  const MyApp({super.key});

  @override
  State<MyApp> createState() => _MyAppState();
}

class _MyAppState extends State<MyApp> {

  late final List<ProductDetails> _products = <ProductDetails>[];

  // create a new instance of this class
  IApEngine iApEngine = IApEngine();
  bool isSubscribed = false;

  //Use ProductId type to create product ids
  final List<ProductId> _productsIds = [
    ProductId(id: "test_sub_weekly1", isConsumable: false),
    ProductId(id: "test_sub_monthly1", isConsumable: false),
  ];


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

    isSubscribed = OnePref.getPremium()!;

    iApEngine.inAppPurchase.purchaseStream.listen((purchaseDetailsList) {
      //listen to the purchases, it will be called everytime there's a purchase or restore purchase.
      listenPurchasedActivities(purchaseDetailsList);
    }, onDone: () {
      print("onDone");
    }, onError: (Object error) {
      print("onError");
    });

    //get products
    getProducts();
  }

  void getProducts() async {
    // This method will handle the query of products from the store.
    await iApEngine.getIsAvailable().then((value) async => {
      if (value)
        {
          await iApEngine.queryProducts(_productsIds).then((value) => {
            setState(() => {
              _products.addAll(value.productDetails),
            })
          })
        }
    });
  }

  Future<void> listenPurchasedActivities(List<PurchaseDetails> list) async {
    if (list.isNotEmpty) {
      for (var purchaseDetails in list) {
        if (purchaseDetails.status == PurchaseStatus.purchased ||
            purchaseDetails.status == PurchaseStatus.restored) {
          //This is for the android
          if (Platform.isAndroid &&
              iApEngine
                  .getProductIdsOnly(_productsIds)
                  .contains(purchaseDetails.productID)) {
            final InAppPurchaseAndroidPlatformAddition androidPlatformAddition =
            iApEngine.inAppPurchase.getPlatformAddition<
                InAppPurchaseAndroidPlatformAddition>();
            await androidPlatformAddition.consumePurchase(purchaseDetails).then(
                  (value) => setState(() => {
                OnePref.setPremium(true),// activate the premium
                isSubscribed = OnePref.getPremium() ?? false,
              }),
            );
          }

          //handles pending purchases
          if (purchaseDetails.pendingCompletePurchase) {
            await iApEngine.inAppPurchase
                .completePurchase(purchaseDetails)
                .then(
                  (value) => setState(() => {
                OnePref.setPremium(true),// activate the premium
                isSubscribed = OnePref.getPremium() ?? false,
              }),
            );
          }
        }
      }
    } else {
      setState(() {
        OnePref.setPremium(false);// de-activate the premium
        isSubscribed = OnePref.getPremium() ?? false;
      });
    }
  }
  @override
  Widget build(BuildContext context) {

    return MaterialApp(
      title: 'Flutter Demo',
      theme: ThemeData(
        primarySwatch: Colors.blue,
      ),
      home: Scaffold(
        body: SafeArea(
          child: Container(
            decoration: const BoxDecoration(
              color: Colors.black,

            ),
            child: Column(
              children: [
                Padding(
                  padding:
                  const EdgeInsets.symmetric(vertical: 20, horizontal: 20),
                  child: Row(
                    mainAxisAlignment: MainAxisAlignment.spaceBetween,
                    children: [
                      OnClickAnimation(
                          onTap: () => {

                          },
                          child: const Text(
                            "Dismiss",
                            style: TextStyle(
                                color: Colors.white,
                                fontWeight: FontWeight.bold),
                          )),
                      OnClickAnimation(
                        onTap: () async => {
                          await InAppPurchase.instance.restorePurchases().then(
                                (value) => {
                              _products.clear(),
                              getProducts(),
                            },
                          ),
                        },
                        child: const Text(
                          "Restore",
                          style: TextStyle(
                              color: Colors.white, fontWeight: FontWeight.bold),
                        ),
                      ),
                    ],
                  ),
                ),
                Padding(
                  padding: const EdgeInsets.symmetric(
                      horizontal: 50.0, vertical: 25.0),
                  child: Row(
                    children: [
                      Expanded(
                        child: Row(
                          children: [
                            const Text(
                              "${Constants.appName} Go ",
                              style: TextStyle(
                                color: Colors.white,
                                fontSize: 30,
                                fontWeight: FontWeight.bold,
                              ),
                            ),
                            Container(
                              decoration: BoxDecoration(
                                borderRadius: BorderRadius.circular(10),
                                color:
                                isSubscribed ? Colors.green : Colors.orange,
                              ),
                              child: const Padding(
                                padding: EdgeInsets.all(8.0),
                                child: Text(
                                  "PRO",
                                  style: TextStyle(color: Colors.white),
                                ),
                              ),
                            )
                          ],
                        ),
                      )
                    ],
                  ),
                ),
                SizedBox(
                  height: 120,
                  child: ListView.builder(
                    itemCount: Constants.benefits.length,
                    itemBuilder: (context, index) => Benefit(
                      title: Constants.benefits[index],
                      icon: Icons.check,
                      iconBackgroundColor: Colors.orange,
                      iconColor: Colors.white,
                      titleStyle: const TextStyle(color: Colors.white),
                    ),
                  ),
                ),
                Visibility(
                  visible: !_products.isNotEmpty,
                  child: const SizedBox(
                    height: 90,
                    width: 90,
                    child: CircularProgressIndicator(),
                  ),
                ),
                Expanded(
                  child: Visibility(
                    visible: _products.isNotEmpty,
                    child: ListView.builder(
                      itemBuilder: ((context, index) => Padding(
                        padding: const EdgeInsets.symmetric(
                            vertical: 5.0, horizontal: 25.0),
                        child: Row(
                          children: [
                            Expanded(
                              child: Container(
                                  decoration: BoxDecoration(
                                    border: Border.all(
                                      color: Colors.orange,
                                      width: 0.5,
                                    ),
                                  ),
                                  child: Padding(
                                      padding: const EdgeInsets.symmetric(
                                        horizontal: 15.0,
                                      ),
                                      child: ListTile(
                                        title: Text(
                                          _products[index].price,
                                          style: const TextStyle(
                                            color: Colors.white,
                                          ),
                                        ),
                                        subtitle: Text(
                                          _products[index].description,
                                          style: const TextStyle(
                                            color: Colors.white,
                                          ),
                                        ),
                                        trailing: OnClickAnimation(
                                          onTap: () => {
                                            iApEngine.handlePurchase(
                                                _products[index],
                                                _productsIds)
                                          },
                                          child: const Text(
                                            "Subscribe",
                                            style: TextStyle(
                                              color: Colors.white,
                                            ),
                                          ),
                                        ),
                                      ))),
                            ),
                          ],
                        ),
                      )),
                      itemCount: _products.length,
                    ),
                  ),
                ),
                const Padding(
                  padding:
                  EdgeInsets.symmetric(vertical: 25.0, horizontal: 25.0),
                  child: Text(
                    "Subscritions automatically renews monthly until canceled.",
                    textAlign: TextAlign.center,
                    style: TextStyle(
                      fontSize: 14,
                      color: Colors.white,
                    ),
                  ),
                )
              ],
            ),
          ),
        ),
      )
    );
  }
}