获取android应用程序向用户显示的应用内购买项目的价格

Question

我正在使用以下库将应用内购买集成到我的android应用中：

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

我想获得应用程序内项目的价格，以显示给用户。如果使用库中的getPurchaseListingDetails（）方法，则会出现列表

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上得到一个空指针异常。setText（purchaseListingDetails.get（0）。货币购买清单详细信息。得到（0）。价格价值） 此行，因为purchaseListingDetails为空。

我如何让它返回List




Answer 1

您需要执行以下代码块：

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（）中。

Answer 2

这个答案已经晚了，但鉴于它没有被接受的答案，我将给出一个可能的解决方案：

>

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

Answer 3

这是因为您输入的产品ID无效。产品ID应该看起来像这样"com.anjlab.test.iab.s2. p5"。