如何在android中实现恢复购买

Question

感谢您访问我的页面。

几天前，我开发了一个简单的安卓游戏，里面有应用内计费。

现在我要实现恢复购买功能，但是不知道怎么点。

我已经进行了几天的谷歌搜索，并找到了许多帮助它的链接，但它们现在对我不起作用。

请让我知道如何以编程方式进行。

我在哪里可以找到恢复购买的样品？

我已经在应用内购买了，但没有恢复购买。

我使用的是 Android Studio 1.5.1。

我已推荐http://www.techotopia.com/index.php/An_Android_Studio_Google_Play_In-app_Billing_Tutorial 实施应用内购买。

请帮帮我:(

提前致谢。

Answer 1

如果您使用 v3 实施 InApp Purchase，则无需担心恢复 Purchase 实施。您可以查询库存并捕获现有的采购信息。请检查实施。

我在这里所做的是我已经有一个购买模块。当我完成购买时，我会将信息发送到我们的服务器。重新登录或返回应用后，无论用户是否已购买，服务器都会发送当前用户的购买信息。如果服务器给出否定结果，我将检查查询库存是否有任何现有购买。为此，我在 MainActivity onCreate() 中使用以下代码。

 mHelper = new IabHelper(this, base64EncodedPublicKey);
        mHelper.enableDebugLogging(true);
        Log.d(TAG, "Starting setup.");
        mHelper.startSetup(new IabHelper.OnIabSetupFinishedListener() {
            public void onIabSetupFinished(IabResult result) {
                Log.d(TAG, "Setup finished.");
                if (!result.isSuccess()) {
                    Log.e(TAG, "In App Set UP error:: Please check gmail account settings/ Credit Card Info etc");
                    return;
                }
                if (mHelper == null) return;
                mBroadcastReceiver = new IabBroadcastReceiver(MainActivity.this);
                IntentFilter broadcastFilter = new IntentFilter(IabBroadcastReceiver.ACTION);

                registerReceiver(mBroadcastReceiver, broadcastFilter);

                Log.d(TAG, "Setup successful. Querying inventory.");
                if (mSupplier.getmSubscriptionStatus() == 0) { // This is the Status given from Local Server 0- UnScubscribed User, 1- Subscribed User
                    mHelper.queryInventoryAsync(mGotInventoryListenerForPurchase);
                }
            }
        });

在结果中，您可以识别现有的购买信息。

IabHelper.QueryInventoryFinishedListener mGotInventoryListenerForPurchase = new IabHelper.QueryInventoryFinishedListener() {
            public void onQueryInventoryFinished(IabResult result, Inventory inventory) {
                try {
                    Log.d(TAG, "Query inventory For Purchase finished.");
                    String payload = // Your developer payload
                    if (mHelper == null) return;
                    if (result.isFailure()) {
                        Log.v(TAG, "PURCHSE RESULT ERROR- NO PURCHASE AVAILABLE");
                        return;
                    }
                    Log.v(TAG, "Query inventory For Purchase was successful.");
                    if (mSkuDetailList == null || mSkuDetailList.isEmpty()) {
                        Log.v(TAG, "SKU INFO FROM LOCAL SERVER- UNABLE TO PURCHASE");
                        return;
                    }
                    Purchase premiumPurchase = null;
                    for (IabSkuDetailModel data : mSkuDetailList) {

                        // Filter the purchase info using SKU:::
                        premiumPurchase = inventory.getPurchase(data.getmPackageName());
                        if (premiumPurchase != null) {
                            break;
                        }
                    }
                    if (premiumPurchase == null) {
                        Log.v(TAG, "NO Available Purchase for this user");
                        return;
                    }
                    if (verifyDeveloperPayload(premiumPurchase)) {
                        Log.v(TAG, "Purchase is there already ::: developer payload is Matching:: This need to update Local Server: No need to purchase agian");
                        if (premiumPurchase.getSku().equalsIgnoreCase(mSelectedSku)) {
                            IabPurchaseUpdateReq request = new IabPurchaseUpdateReq();
                            request.setmPurchaseToken(premiumPurchase.getToken());
                            request.setmUserId("" + mSupplier.getmUserId());
                            request.setmPublicKey(IabConstants.IAB_RSA_PUBLIC_KEY);
                            request.setmSignature(premiumPurchase.getSignature());
                            request.setmSubscriptionId(premiumPurchase.getSku());
                            request.setmPurchaseObj(premiumPurchase.getOriginalJson());

                            //Update "result to local Server"
                        } else {
                            Log.v(TAG, "SKU mismatch ::: ");
                        }
                    } else {
                         Log.v(TAG, "Developer payload error:: Wrong Purchase");
                    }
                } catch (Exception e) {
                    e.printStackTrace();
                }
            }
        };