Android應用內結算條件？

Question

我想知道如何創建條件（例如，如果用戶購買項目可以顯示特定活動，如果沒有，不。）那么我該如何編寫，檢查用戶是否購買了該項目。 您認為代碼可以適用於您只能購買一次的商品嗎？

我按照指南寫了它。 這是我的代碼。

public class Acquisti_In_App extends Activity {

    private static final String TAG = "com.Amarildo.Acquisti_In_App";
    IabHelper mHelper;

    static final String PRINCIPIANTE_SKU = "com.amarildo.raccolta_principiante";
    static final String INTERMEDIO_SKU = "com.amarildo.raccolta_intermedio";
    static final String AVANZATO_SKU = "com.amarildo.raccolta_avanzato";

    private Button principiante, intermedio, avanzato;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.acquisti_in_app);

        principiante = (Button)findViewById(R.id.principiante);
        intermedio = (Button)findViewById(R.id.intermedio);
        avanzato = (Button)findViewById(R.id.avanzato);


        String base64EncodedPublicKey =
                "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAwPC4dwcGb33Hp+823BtSe909sXNIHHkmzLOJCynHWh73P4BJZmsRm5oESGBcpwQTrak3hpthOtyJI4deSbg6N67nRjV9aJ3jXWAhOD//CLQvTZDtBHy9V4B+G5BhXNxd6BscNfa0iullCzbKyDuPou+o66dTItM0TFJAGEHiizdToY7peJrtLN5X4P+wRCzGiL3Awan7ZEj26y+U0lDQbWzCTKacIbr+K4giazaRvT217FnKuvVUIeqf0eiy+SqYsdYEQFy0XT6wmICO3LsoOSgPNyu8Nlezp3tqiMMjSae14hu7YFnBXxtrn9fHeaAlx/osnEs79VDNMYybFdJYOwIDAQAB";

        mHelper = new IabHelper(this, base64EncodedPublicKey);

        mHelper.startSetup(new
                                   IabHelper.OnIabSetupFinishedListener() {
                                       public void onIabSetupFinished(IabResult result)
                                       {
                                           if (!result.isSuccess()) {
                                               Log.d(TAG, "In-app Billing setup failed: " +
                                                       result);
                                           } else {
                                               Log.d(TAG, "In-app Billing is set up OK");
                                           }
                                       }
                                   });
    }

    public void principiante(View view) {
        mHelper.launchPurchaseFlow(this, PRINCIPIANTE_SKU, 10001, mPurchaseFinishedListener, "principiante");
    }

    public void intermedio(View view) {
        mHelper.launchPurchaseFlow(this, INTERMEDIO_SKU, 10002, mPurchaseFinishedListener, "intermedio");
    }

    public void avanzato(View view) {
        mHelper.launchPurchaseFlow(this, AVANZATO_SKU, 10003, mPurchaseFinishedListener, "avanzato");
    }

    @Override
    protected void onActivityResult(int requestCode, int resultCode, Intent data) {
        if (!mHelper.handleActivityResult(requestCode,
                resultCode, data)) {
            super.onActivityResult(requestCode, resultCode, data);
        }
    }

    IabHelper.OnIabPurchaseFinishedListener mPurchaseFinishedListener
            = new IabHelper.OnIabPurchaseFinishedListener() {
        public void onIabPurchaseFinished(IabResult result,
                                          Purchase purchase)
        {
            if (result.isFailure()) {
                // Handle error
                return;
            }
            else if (purchase.getSku().equals(PRINCIPIANTE_SKU)) {
                consumeItem();
            }
            else if (purchase.getSku().equals(INTERMEDIO_SKU)) {
                consumeItem();
            }
            else if (purchase.getSku().equals(AVANZATO_SKU)) {
                consumeItem();
            }

        }
    };

    public void consumeItem() {
        mHelper.queryInventoryAsync(mReceivedInventoryListener);
    }

    IabHelper.QueryInventoryFinishedListener mReceivedInventoryListener
            = new IabHelper.QueryInventoryFinishedListener() {
        public void onQueryInventoryFinished(IabResult result,
                                             Inventory inventory) {

            if (result.isFailure()) {
                //trattere errore
            } else {
                mHelper.consumeAsync(inventory.getPurchase(PRINCIPIANTE_SKU),mConsumeFinishedListener);
                mHelper.consumeAsync(inventory.getPurchase(INTERMEDIO_SKU),mConsumeFinishedListener);
                mHelper.consumeAsync(inventory.getPurchase(AVANZATO_SKU),mConsumeFinishedListener);
            }
        }
    };

    IabHelper.OnConsumeFinishedListener mConsumeFinishedListener =
            new IabHelper.OnConsumeFinishedListener() {
                public void onConsumeFinished(Purchase purchase,
                                              IabResult result) {

                    if (result.isSuccess()) {
                        //clickButton.setEnabled(true);
                    } else {
                        // handle error
                    }
                }
            };

    @Override
    public void onDestroy() {
        super.onDestroy();
        if (mHelper != null) mHelper.dispose();
        mHelper = null;
    }
}

Answer 1

當用戶啟動應用程序或購買結束后，您應該通過ServiceConnection調用方法getPurchases來檢查該用戶所做的購買：

Bundle ownedItems = mService.getPurchases(3, getPackageName(), "inapp", null);

如果您正在使用耗材，那么您應該使用consumePurchase方法使用它們：

int response = mService.consumePurchase(3, getPackageName(), token);

如Android開發者頁面中所述 ：

Google Play服務僅返回當前登錄到設備的用戶帳戶所做的購買。 如果請求成功，則返回的Bundle的響應代碼為0.響應Bundle還包含產品ID列表，每次購買的訂單詳細信息列表以及每次購買的簽名。

當您獲得購買時，您可以檢查用戶購買的項目，並顯示與其購買相對應的活動/片段。 從頁面中的示例代碼：

int response = ownedItems.getInt("RESPONSE_CODE");
if (response == 0) {
   ArrayList<String> ownedSkus =
      ownedItems.getStringArrayList("INAPP_PURCHASE_ITEM_LIST");
   ArrayList<String>  purchaseDataList =
      ownedItems.getStringArrayList("INAPP_PURCHASE_DATA_LIST");
   ArrayList<String>  signatureList =
      ownedItems.getStringArrayList("INAPP_DATA_SIGNATURE");
   String continuationToken = 
      ownedItems.getString("INAPP_CONTINUATION_TOKEN");

   for (int i = 0; i < purchaseDataList.size(); ++i) {
      String purchaseData = purchaseDataList.get(i);
      String signature = signatureList.get(i);
      String sku = ownedSkus.get(i);

      // do something with this purchase information
      // e.g. display the updated list of products owned by user
   } 

   // if continuationToken != null, call getPurchases again 
   // and pass in the token to retrieve more items
}

像這樣，您可以指定應向用戶顯示哪些活動或片段。

另外，我建議您將應用內結算流程的令牌放在另一個文件中，這只是一個安全措施。