獲取 Android 應用程序內購買項目的價格以顯示給用戶

Question

我正在使用以下庫在我的 android 應用程序中集成應用程序購買：

https://github.com/anjlab/android-inapp-billing-v3#getting-listing-details-of-your-products

我想獲取要向用戶顯示的應用內商品的價格。 如果我使用庫中的getPurchaseListingDetails()方法，則必須返回一個List<SkuDetails> ，我可以從中提取價格。 但是我的代碼只返回一個空值。

BillingProcessor bp;

ArrayList<String> arrayListOfProductIds;

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

    arrayListOfProductIds = new ArrayList<>();

    arrayListOfProductIds.add("level_unlock");
    arrayListOfProductIds.add("hint_buy");
    arrayListOfProductIds.add("hint_level");

    boolean isAvailable = BillingProcessor.isIabServiceAvailable(this);
    if(isAvailable) {
        bp = BillingProcessor.newBillingProcessor(this, "MIIBIjANBgkqhkiG9w0BAQEFAAOCAQ8AMIIBCgKCAQEAz0mDL13z6FtY0Xy09ru0LST4pgy4ph6smeHEsaFbX8fZYVR6SM+eHSIA3j+DnUhiRK8QTun/VJdRnbovvX25rrMju3unAqJzur5whB/4OSXoh6YLOp5+UBiAPuQEzOFsmVhJlwZVH8ScjjwveqXmkByaTde4Ca/FrSoQpbFcuGY0BJPfSSxaQzjs9pwbhNpUqAXF3pbay4/B4o0tw9+rK/8qcGW2ZbG2V/VPQzMZKKBKfyCogY2YV37q80s8CP3tqBzbbnLOF9pmji3A/iuRheclfVuFjj1p7keXMUch2kPPrRJVtLcDbR8gBG0Gju/27zCIaFzFG2RWeu45Qkw5uQIDAQAB", this);
        bp.initialize();
    }

    LinearLayout backButtonShop = (LinearLayout) findViewById(R.id.back_button_shop);
    backButtonShop.setOnClickListener(this);

    Button priceButton01 = (Button) findViewById(R.id.price_button_01);
    priceButton01.setOnClickListener(this);

    Button priceButton02 = (Button) findViewById(R.id.price_button_02);
    priceButton02.setOnClickListener(this);

    Button priceButton03 = (Button) findViewById(R.id.price_button_03);
    priceButton03.setOnClickListener(this);

    List<SkuDetails> purchaseListingDetails = bp.getPurchaseListingDetails(arrayListOfProductIds);
    priceButton01.setText(purchaseListingDetails.get(0).currency + purchaseListingDetails.get(0).priceValue);
    priceButton02.setText(purchaseListingDetails.get(1).currency + purchaseListingDetails.get(1).priceValue);
    priceButton03.setText(purchaseListingDetails.get(2).currency + purchaseListingDetails.get(2).priceValue);

    }

}

我在priceButton01.setText(purchaseListingDetails.get(0).currency + purchaseListingDetails.get(0).priceValue);處得到一個空指針異常priceButton01.setText(purchaseListingDetails.get(0).currency + purchaseListingDetails.get(0).priceValue); 這一行是因為purchaseListingDetails為空。

如何讓它返回List<SkuDetails>而不是 null ？

Answer 1

這是因為您輸入的產品 ID 無效。 產品 ID 應該類似於"com.anjlab.test.iab.s2.p5" 。

Answer 2

這個答案來晚了，但看到它沒有被接受的答案，我會給出一個可能的解決方案：

• 您的產品 ID（“level_unlock”等）似乎有效

• 嘗試將您的代碼放在以下方法下：

   @Override public void onBillingInitialized() { <your code here> }

Answer 3

你需要執行這段代碼：

List<SkuDetails> purchaseListingDetails = bp.getPurchaseListingDetails(arrayListOfProductIds);
    priceButton01.setText(purchaseListingDetails.get(0).currency + purchaseListingDetails.get(0).priceValue);
    priceButton02.setText(purchaseListingDetails.get(1).currency + purchaseListingDetails.get(1).priceValue);
    priceButton03.setText(purchaseListingDetails.get(2).currency + purchaseListingDetails.get(2).priceValue);

在onBillingInitialized()方法中，而不是在onCreate() 。