从Google Play获取价格，应用内购买

Question

我想直接从Google Play获得应用内商品的价格，而不是硬编码。我发现以下功能

public String getPricesDev() throws RemoteException, JSONException{
    String packageName = mContext.getPackageName();
    ArrayList<String> skuList = new ArrayList<String>();
    skuList.add("batforerproven.permanent.cat1"); //Is this correct? Name of products?
    skuList.add("batforerproven.permanent.cat2");
    Bundle querySkus = new Bundle();
    querySkus.putStringArrayList("ITEM_ID_LIST", skuList);
    Bundle skuDetails = mService.getSkuDetails(3,packageName, ITEM_TYPE_INAPP, querySkus);
    int response = skuDetails.getInt("RESPONSE_CODE");
    if (response == 0) {
        ArrayList<String> responseList 
        = skuDetails.getStringArrayList("DETAILS_LIST");
        for (String thisResponse : responseList) {
            JSONObject object = new JSONObject(thisResponse);
            String sku = object.getString("productId");
            String price = object.getString("price");
            if(sku.contains("batforerproven.permanent.cat2")) return price; 
        }
    } 
    return "Not found";
}

问题是，我试图在绑定服务之前使用这些代码。（mService为空）

在onCreate（）中，我进行了一些UI设置，然后调用

mIabHelper = new IabHelper(this, base64EncodedPublicKey);
    mIabHelper.startSetup(new IabHelper.OnIabSetupFinishedListener() {
        public void onIabSetupFinished(IabResult result) 
        {
            if (!result.isSuccess()) {
                Toast.makeText(BuyExtras.this, "Feil ved kobling mot Google Play.", Toast.LENGTH_LONG).show();
            } else {             
                mIabHelper.queryInventoryAsync(mReceivedInventoryListener);
            }
        }
    });

然后我尝试调用mIabHelper.getPricesDev()，但它导致指针为空，因为mService为空。。。

我应该调用哪些功能来设置服务？

Answer 1

我通过对现有代码进行简单更改来解决这个问题。。我所做的是改变

mIabHelper.queryInventoryAsync(mReceivedInventoryListener);

至

ArrayList<String> additionalSkuList = new ArrayList<String>();
additionalSkuList.add(ITEM_CAT_1);
additionalSkuList.add(ITEM_CAT_2);
additionalSkuList.add(ITEM_CAT_3);
additionalSkuList.add(ITEM_PREMIUM);
mIabHelper.queryInventoryAsync(true, additionalSkuList, mQueryFinishedListener);

在听众中，我添加了

cat1Desc.setText(inventory.getSkuDetails(ITEM_CAT_1).getDescription());
cat2Desc.setText(inventory.getSkuDetails(ITEM_CAT_2).getDescription());
cat3Desc.setText(inventory.getSkuDetails(ITEM_CAT_3).getDescription());
PremiumDesc.setText(inventory.getSkuDetails(ITEM_PREMIUM).getDescription());
buyCat1Btn.setText(inventory.getSkuDetails(ITEM_CAT_1).getPrice());
buyCat2Btn.setText(inventory.getSkuDetails(ITEM_CAT_2).getPrice());
buyCat3Btn.setText(inventory.getSkuDetails(ITEM_CAT_3).getPrice());
buyPremiumBtn.setText(inventory.getSkuDetails(ITEM_PREMIUM).getPrice());