教學課程

如果您是透過 Google Play 商店發布 Android 應用程式，就可以將該應用程式與 Google Pay API 整合。您也可以將該應用程式設為接受付款卡。如要整合應用程式並將其設為接受付款卡，請按照本教學課程的步驟操作。

步驟 1：定義 Google Pay API 版本。
步驟 2：為付款服務供應商申請付款代碼。
步驟 3：定義支援的付款卡發卡機構。
步驟 4：說明您允許的付款方式。
步驟 5：建立 PaymentsClient 執行個體。
步驟 6：判斷是否適合使用 Google Pay API 付款。
步驟 7：建立 PaymentDataRequest 物件。
步驟 8：針對使用者手勢註冊事件處理常式。
步驟 9：處理回應物件。
完整的實作範例。

步驟 1：定義 Google Pay API 版本

宣告應用程式使用的 Google Pay API 版本。主要版本和次要版本會影響每個傳送物件中預期的欄位，並且會包含在回應中。

建立基本要求物件，其中包含所有其他要求物件中存在的屬性。

Kotlin

    private val baseRequest = JSONObject().apply {
        put("apiVersion", 2)
        put("apiVersionMinor", 0)
    }PaymentsUtil.kt

Java

  private static JSONObject getBaseRequest() throws JSONException {
    return new JSONObject().put("apiVersion", 2).put("apiVersionMinor", 0);
  }PaymentsUtil.java

步驟 2：替付款服務供應商申請付款權杖

Google 會將付款人所選卡片的相關資訊加密，以便付款服務供應商安全地處理。

Kotlin

private fun gatewayTokenizationSpecification(): JSONObject {
    return JSONObject().apply {
        put("type", "PAYMENT_GATEWAY")
        put("parameters", JSONObject(mapOf(
                "gateway" to "example",
                "gatewayMerchantId" to "exampleGatewayMerchantId")))
    }
}

Java

  private static JSONObject getGatewayTokenizationSpecification() throws JSONException {
    return new JSONObject() {{
      put("type", "PAYMENT_GATEWAY");
      put("parameters", new JSONObject() {{
        put("gateway", "example");
        put("gatewayMerchantId", "exampleGatewayMerchantId");
      }});
    }};
  }PaymentsUtil.java

將 example 和 exampleGatewayMerchantId 替換為適用於付款服務供應商的值。請參閱下表，找出服務供應商適用的特定 gateway 和 gatewayMerchantId 值：

閘道	參數和文件
ABA PayWay	"gateway": "ababank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
accept.blue	"gateway": "acceptblue" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
ACI	"gateway": "aciworldwide" "gatewayMerchantId": "`YOUR_ENTITY_ID`" 開發人員說明文件
ACpay	"gateway": "acpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Acquired.com	"gateway": "acquired" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Adyen	"gateway": "adyen" "gatewayMerchantId": "`YOUR_MERCHANT_ACCOUNT_NAME`" 開發人員說明文件
Airba Pay	"gateway": "airbapay" "gatewayMerchantId": "`YOUR_MERCHANT_ACCOUNT_NAME`" 開發人員說明文件
Airvend	"gateway": "airvend" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Airwallex	"gateway": "airwallex" "gatewayMerchantId": "`YOUR_MERCHANT_ACCOUNT_NAME`" 開發人員說明文件
Akurateco	"gateway": "akuratecolab" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Alfa-Bank	"gateway": "alfabank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Algoritma	"gateway": "algoritma" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Allinpay	"gateway": "allinpayintl" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
AllPayments	"gateway": "allpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
alticepay	"gateway": "alticepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Anedot	"gateway": "anedot" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
ApcoPay	"gateway": "apcopay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
APPEX	"gateway": "epos" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
AsiaBill	"gateway": "asiabill" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 沒有可用的開發人員說明文件
Assist	"gateway": "assist" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Assist Belarus	"gateway": "belassist" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Assist Kazakhstan	"gateway": "assistkz" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Aurus	"gateway": "auruspay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Axerve	"gateway": "gestpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Bank 131	"gateway": "bank131" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Bank Vostok	"gateway": "bankvostok" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Barclaycard	"gateway": "barclayssmartpayadvance" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Barion	"gateway": "barion" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
BCC.KZ	"gateway": "bccpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
bePaid	"gateway": "ecomcharge" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Bereke Bank	"gateway": "berekepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Billing Systems	"gateway": "billingsystems" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Bizzon	"gateway": "bizzon" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Blocks	"gateway": "blocks" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Bluefin	"gateway": "bluefin" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Blue Media	"gateway": "bluemedia" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
BlueSnap	"gateway": "bluesnap" "gatewayMerchantId": "`YOUR_shopToken`" 開發人員說明文件
BPC	"gateway": "bpcpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
BR-DGE	"gateway": "comcarde" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Braintree	"gateway": "braintree" "braintree:apiVersion": "v1" "braintree:sdkVersion": "braintree.client.`VERSION`" "braintree:merchantId": "`YOUR_BRAINTREE_MERCHANT_ID`" "braintree:clientKey": "`YOUR_BRAINTREE_TOKENIZATION_KEY`" 開發人員說明文件
Braspag	"gateway": "cielo" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
BridgerPay	"gateway": "bridgerpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Buya	"gateway": "buya" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
CardConnect	"gateway": "cardconnect" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Cardknox	"gateway": "cardknox" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Cardstream	"gateway": "crst" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Cashflows	"gateway": "cashflowsgateway" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
國泰世華商業銀行	"gateway": "cathaybk" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
CCAvenue UAE	"gateway": "ccavenueuae" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Cecabank	"gateway": "cecabank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Celerispay	"gateway": "celerispay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
CentralPay	"gateway": "centralpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Chargehive	"gateway": "chargehive" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
CharityEngine	"gateway": "charityengine" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Chase Merchant Services	"gateway": "chase" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Checkout.com	"gateway": "checkoutltd" "gatewayMerchantId": "`YOUR_PUBLIC_KEY`" 開發人員說明文件
CityPay	"gateway": "citypay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Cloud9 Payment Gateway (C9PG)	"gateway": "c9pg" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
CloudPayments	"gateway": "cloudpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
CloudWalk	"gateway": "cloudwalk" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 开发者文档
Computop	"gateway": "computop" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
ConcordPay	"gateway": "concordpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Connectum	"gateway": "connectum" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
ConnexPay	"gateway": "connexpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Corefy	"gateway": "paycoreio" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Corvus Pay	"gateway": "corvuspay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Credorax	"gateway": "credorax" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
CrossPay	"gateway": "crosspay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
CTBC Bank	"gateway": "ctbcbank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
CURO Payments	"gateway": "curopayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Cybersource	"gateway": "cybersource" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
danube.pay	"gateway": "danubepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Datacap Systems, Inc.	"gateway": "datacap systems inc." "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Datatrans	"gateway": "datatrans" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
DECTA	"gateway": "decta" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 沒有可用的開發人員說明文件
Deutsche Bank AG	"gateway": "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 沒有可用的開發人員說明文件
Deutsche Bank – Merchant Solutions	"gateway": "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
DG Financial Technology, Inc.	"gateway": "veritrans" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Digital Finance	"gateway": "digitalfinance" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
dLocal	"gateway": "dlocal" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
DNA Payments	"gateway": "dnapayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Dojo	"gateway": "dojo" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Dotpay	"gateway": "dotpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
e-SiTef - Software Express	"gateway": "softwareexpress" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
EasyPay	"gateway": "easypay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
EBANX	"gateway": "ebanx" "gatewayMerchantId": "`YOUR_PUBLIC_INTEGRATION_KEY`" 開發人員說明文件
eCard	"gateway": "ecard" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
ECOMMPAY	"gateway": "ecommpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Ecopaynet	"gateway": "ecopaynet" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
ECPay	"gateway": "ecpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 沒有可用的開發人員說明文件
eGHL	"gateway": "eghl" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Elavon (Converge)	"gateway": "convergepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Emerchantpay	"gateway": "emerchantpay" "gatewayMerchantID": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
emspay	"gateway": "emsonline" "gatewayMerchantID": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
EpicPay	"gateway": "epicpay" "gatewayMerchantID": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Espago	"gateway": "espago" "gatewayMerchantID": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
EveryPay	"gateway": "everypay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
EVONET	"gateway": "cardinfolink" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Evopay	"gateway": "evopay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Evo Payment Gateway	"gateway": "evopaymentgateway" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 沒有可用的開發人員說明文件
exactly.com	"gateway": "exactly" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Exact Payments	"gateway": "exactpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Fat Zebra	"gateway": "fatzebra" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Fenige	"gateway": "fenige" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Fibonatix	"gateway": "fibonatixparagon" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Financial Line	"gateway": "finline" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Finanso UA	"gateway": "finansoua" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
FINEXUS	"gateway": "finexus" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Finix	"gateway": "finix" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
First American by Deluxe	"gateway": "firstpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
First Data (Payeezy)	"gateway": "firstdata" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
FIS Biller Solutions	"gateway": "fisglobalbsp" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Fluid Pay	"gateway": "fluidpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
FM Finance LTD	"gateway": "fmfinanceltd" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
ForteBank	"gateway": "fortebank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Freedom Finance Bank	"gateway": "axayscom" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
FreedomPay	"gateway": "freedompay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Freepay	"gateway": "freepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Frontstream	"gateway": "frontstreampayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Fung Payments	"gateway": "fungpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
GBPayments	"gateway": "gbpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
geidea	"gateway": "geidea" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
GETTRX	"gateway": "globalelectronictechnology" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Global One Pay	"gateway": "globalonepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 沒有可用的開發人員說明文件
Global Payments	"gateway": "globalpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
GMO Payment Gateway	"gateway": "gmopg" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
GoDaddy Payments	"gateway": "godaddypayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Good Idea Technologies	"gateway": "git" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
GoPay	"gateway": "gopay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
GP Webpay	"gateway": "gpwebpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 沒有可用的開發人員說明文件
Gr4vy	"gateway": "gr4vy" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Gravity Payments	"gateway": "gravitypayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Halyk Bank	"gateway": "halykbank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Helcim	"gateway": "helcim" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
HIPS	"gateway": "hips" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
HiTrust	"gateway": "hitrustpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Hyp	"gateway": "hyp" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
icard	"gateway": "icardwallet" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
iKhokha	"gateway": "ikhokha" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
IMOJE	"gateway": "imoje" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Impaya	"gateway": "impayarus" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
InPlat	"gateway": "inplat" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
InstaMed	"gateway": "instamed" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
IntellectMoney	"gateway": "intellectmoney" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Interactive Transaction Solutions	"gateway": "interactivets" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Interswitch Payment Gateway	"gateway": "interswitch" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Intervale	"gateway": "intervale" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
ioka (TOO Payment Processing)	"gateway": "ioka" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
iPay88	"gateway": "ipay88" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
IPSI	"gateway": "ipsi" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
iQmetrix	"gateway": "iqmetrixpaymentservicesgateway" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
IXOPAY	"gateway": "ixopay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
JetPay	"gateway": "jetpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
JudoPay	"gateway": "judopay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 沒有可用的開發人員說明文件
Kassa	"gateway": "kassacom" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
kassa24pay	"gateway": "kassa24pay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Kineox	"gateway": "kineox" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Klix by Citadele	"gateway": "klix" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Lapsa Payments	"gateway": "lapsapayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
LHV Pank	"gateway": "lhvpank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Liberty	"gateway": "liberty" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Life Pay	"gateway": "lifepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Limepay	"gateway": "limepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
LiqPay	"gateway": "liqpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Littlepay	"gateway": "littlepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
LogPay	"gateway": "logpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Loyale	"gateway": "loyale" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
lynck	"gateway": "lynck" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Lyra	"gateway": "lyra" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Magnetiq Bank	"gateway": "magnetiq" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
MakeCommerce (Maksekeskus)	"gateway": "maksekeskus" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Mastercard Payment Gateway Services	"gateway": "mpgs" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Mandarin	"gateway": "mandarin" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Market Pay	"gateway": "marketpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
MerchantE	"gateway": "merchante" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Merchant Warrior	"gateway": "merchantwarrior" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Minsait Payments Systems	"gateway": "minsaitpaymentsgateway" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
MITEC	"gateway": "mitecmx" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
MIXPLAT	"gateway": "mixplat" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
MOBI.Money	"gateway": "mobimoney" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Modulbank	"gateway": "modulbank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Molpay	"gateway": "molpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 沒有可用的開發人員說明文件
Mondido	"gateway": "mondido" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Monei	"gateway": "monei" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
monek	"gateway": "monek" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Moneris	"gateway": "moneris" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Moneta	"gateway": "moneta" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 沒有可用的開發人員說明文件
Monext	"gateway": "monext" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Money.Mail.Ru	"gateway": "moneymailru" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
MPay	"gateway": "managepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
mstartipg	"gateway": "mstartipg" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Multicarta	"gateway": "mulitcarta" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
MultiSafepay	"gateway": "multisafepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Mundipagg	"gateway": "mundipagg" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
MyCheck	"gateway": "mycheck" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
MyChoice2Pay	"gateway": "mychoice2pay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
MyFatoorah	"gateway": "myfatoorah" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
MyPay	"gateway": "mypay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 沒有可用的開發人員說明文件
myPOS	"gateway": "mypos" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
N&TS Group	"gateway": "netsgroup" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
NCCC	"gateway": "nccc" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Neon Pay	"gateway": "neonpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Netopia	"gateway": "netopia" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Netvalve	"gateway": "netvalve" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
藍新金流 (原為「STPath」、「Pay2Go」)	"gateway": "newebpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Newtech	"gateway": "newtechmobile" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Nexi	"gateway": "nexi" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
NMI	"gateway": "gatewayservices" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
noon payments	"gateway": "noonpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Noqoody Pay	"gateway": "noqoodypay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Novalnet	"gateway": "novalnet" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
NTT DATA	"gateway": "nttdatahk" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Nuvei	"gateway": "nuvei" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Oceanpayment	"gateway": "oceanpayment" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Omise	"gateway": "omise" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
One Inc	"gateway": "oneinc" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Onelya	"gateway": "onelya" "gatewayMerchantId": "`YOUR_GATWAY_MERCHANT_ID`" 開發人員說明文件
Onerway	"gateway": "ronghan" "gatewayMerchantId": "`YOUR_GATWAY_MERCHANT_ID`" 開發人員說明文件
OneVision Limited	"gateway": "onevision" "gatewayMerchantId": "`YOUR_GATWAY_MERCHANT_ID`" 開發人員說明文件
OnPay	"gateway": "onpayio" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Opayo by Elavon	"gateway": "opayoelavon" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Oschadbank	"gateway": "oschadbank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
pagarme	"gateway": "pagarme" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PagBank	"gateway": "pagbank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PagBrasil	"gateway": "pagbrasil" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PagSeguro	"gateway": "pagsegurointernational" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PAY2M	"gateway": "pay2m" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Payarc	"gateway": "payarc" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PAYCOMET	"gateway": "paycomet" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Paydock	"gateway": "paydock" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
首信易支付	"gateway": "payeasenet" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayEngine	"gateway": "payengine" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayFabric	"gateway": "payfabric" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayFacto	"gateway": "payfacto" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
paygent	"gateway": "paygent" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Payhub	"gateway": "payhub" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayLane	"gateway": "paylane" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Payler	"gateway": "payler" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayLink®	"gateway": "paylink" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Payload	"gateway": "payload" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Paymark	"gateway": "paymark" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayMaster	"gateway": "paymaster" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Payment Fusion	"gateway": "paymentfusion" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Paymentvision	"gateway": "paymentvision" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Paymentwall	"gateway": "paymentwall" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Paymo	"gateway": "paymo" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Paymob	"gateway": "gpaymob" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Paymtech	"gateway": "paymtech" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayNearMe	"gateway": "paynearme" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Payneteasy	"gateway": "payneteasy" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Pay.nl	"gateway": "paynl" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Paynopain	"gateway": "paynopain" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayOne	"gateway": "payone" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayOnline	"gateway": "payonline" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Payoo	"gateway": "payoo" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayPlus	"gateway": "payplus" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Payrails	"gateway": "payrails" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Payrexx	"gateway": "payrexx" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayRiff	"gateway": "payriff" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Payrix	"gateway": "payrix" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Paysafe	"gateway": "paysafe" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Payscout	"gateway": "payscout" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Paysend Business	"gateway": "paysend" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Paysoft	"gateway": "paysoft" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Pay360	"gateway": "pay360" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
paytech	"gateway": "paytechsolutions" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayTech Ukraine	"gateway": "paytech" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Paythru	"gateway": "paythru" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Payture	"gateway": "payture" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayU	"gateway": "payu" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayU LATAM	"gateway": "payulatam" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PAYUNi	"gateway": "payuni" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayU Romania	"gateway": "payuro" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PayU Russia	"gateway": "payuru" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Payway	"gateway": "payway" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Paywiser	"gateway": "paywiser" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Pelecard	"gateway": "pelecard" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Pikassa	"gateway": "pikassa" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PingPong	"gateway": "pingpongx" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Pin Payments	"gateway": "pinpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Planet	"gateway": "cccpayment" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PlanetPay	"gateway": "itcardpaymentservice" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Plategka.com	"gateway": "plategkacom" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Platon	"gateway": "platon" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Pomelo	"gateway": "pomelopay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Portmone	"gateway": "portmonecom" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Primer	"gateway": "primer" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Procard	"gateway": "procard" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
ProcessOut	"gateway": "processout" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Przelewy24	"gateway": "przelewy24" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PSB Bank	"gateway": "psbank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PSCB	"gateway": "pscbru" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
PXP Financial	"gateway": "pxpfinancial" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
QIWI	"gateway": "qiwi" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Qualpay	"gateway": "qualpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
QuickPay	"gateway": "quickpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Qvalent	"gateway": "qvalent" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Radial	"gateway": "radial" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Rapyd	"gateway": "rapyd" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
RBK.money	"gateway": "rbkmoney" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Rebail Capital	"gateway": "rebailcapital" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Rebilly	"gateway": "Rebilly" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Recurly	"gateway": "recurly" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Reddot	"gateway": "reddotpayment" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Redsys	"gateway": "redsys" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Reepay	"gateway": "reepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
RocketGate	"gateway": "rocketgate" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Russian Standard Bank	"gateway": "rsb" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Ryft	"gateway": "ryft" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Saferpay	"gateway": "worldlinesaferpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Safexpay	"gateway": "safexpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Sberbank	"gateway": "sberbank" "gatewayMerchantId": "`YOUR_ORGANIZATION_NAME`" 開發人員說明文件
SEB Baltic	"gateway": "sebbaltic" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Sense Bank	"gateway": "sensebank" "gatewayMerchantId": "`YOUR_ORGANIZATION_NAME`" 開發人員說明文件
SensePass	"gateway": "sensepass" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Shift4	"gateway": "shift4payments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Shiji Group	"gateway": "shijipaymentsolutions" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
SH Start High	"gateway": "shstartpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
simbasoft	"gateway": "simbasoft" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Sipay	"gateway": "sipay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Softbank Payment Service	"gateway": "sbps" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Solid	"gateway": "solid" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Sony Payment Services	"gateway": "sonypaymentservices" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Splitit	"gateway": "splitit" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Spreedly	"gateway": "spreedly" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Square	"gateway": "square" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
SredaPay	"gateway": "sredapay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Stancer	"gateway": "stancer" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Stripe	"gateway": "stripe" "stripe:version": "2018-10-31" "stripe:publishableKey": "`YOUR_PUBLIC_STRIPE_KEY`" 開發人員說明文件
紅陽科技	"gateway": "esafe" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Surfboard Payments	"gateway": "surfboard" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Swedbank Baltic	"gateway": "swedbankbaltic" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
TabaPay	"gateway": "tabapay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
TapPay (喬睿科技)	"gateway": "tappay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
TapPayments	"gateway": "tappayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
tarlanpayments	"gateway": "tarlanpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
TAS Link	"gateway": "taslink" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Tatra banka (CardPay)	"gateway": "tatrabanka" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 沒有可用的開發人員說明文件
TEKO	"gateway": "teko" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Tinkoff	"gateway": "tinkoff" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
theMAP	"gateway": "themap" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
tillpayments	"gateway": "themap" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
TPay.com	"gateway": "tpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Transact Campus	"gateway": "transactcampus" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Transaction Services Network	"gateway": "tns" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Transpayrent	"gateway": "transpayrent" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Tranzila	"gateway": "tranzila" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Tranzzo	"gateway": "tranzzo" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Tribe Payments	"gateway": "tribepayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Truevo	"gateway": "truevo" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
TrustPay	"gateway": "trustpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Trust Payments	"gateway": "trustpayments" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Tuna	"gateway": "tuna" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
2can&ibox	"gateway": "twocan" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
UAPAY	"gateway": "uapay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
UBRR	"gateway": "ubrrpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Ukrcard	"gateway": "ukrcardpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
UkrGasBank Pay	"gateway": "ukrgasbankpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Unibank OJSC	"gateway": "unibankcheckout" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
unitedfinancialcorporation	"gateway": "unitedfinancialcorporation" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Uniteller	"gateway": "uniteller" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Unitpay	"gateway": "unitpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Unlimint	"gateway": "unlimint" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Unzer	"gateway": "unzer" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Unzer Austria	"gateway": "unzeraustria" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
UPC	"gateway": "upc" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Upgate	"gateway": "upgate" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
USAePay	"gateway": "usaepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
UseePay	"gateway": "useepay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Valitor	"gateway": "valitor" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Vantiv	"gateway": "vantiv" "vantiv:merchantPayPageId": "`YOUR_PAY_PAGE_ID`" "vantiv:merchantOrderId": "`YOUR_ORDER_ID`" "vantiv:merchantTransactionId": "`YOUR_TRANSACTION_ID`" "vantiv:merchantReportGroup": "*web" 開發人員說明文件
Verestro	"gateway": "verestro" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Very Good Security	"gateway": "verygoodsecurity" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Vindicia	" "gateway": "vindicia" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Viva Wallet	"gateway": "vivawallet" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
VTEX	"gateway": "vtex" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Walletdoc	"gateway": "walletdoc" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Walletto	"gateway": "walletto" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
WayForPay	"gateway": "wayforpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
WEAT	"gateway": "weatpay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
WhenThen	"gateway": "whenthen" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Windcave	"gateway": "windcave" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Wirebank	"gateway": "wirebank" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Wirecard	"gateway": "wirecard" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
WOOPPAY	"gateway": "wooppay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
WooshPay	"gateway": "swooshtransfer" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Worldline (GlobalCollect)	"gateway": "globalcollect" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Worldline - Ingenico (WL Online Checkout)	"gateway": "worldlineingenicoogone" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Worldline Nordics (Worldline Online Checkout)	"gateway": "worldlineonlinecheckout" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Worldline Sips	"gateway": "wlsips" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Worldnet	"gateway": "worldnet" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Worldpay	"gateway": "worldpay" "gatewayMerchantId": "`YOUR_WORLDPAY_MERCHANT_ID`" 開發人員說明文件
Wpay	"gateway": "wpayaus" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
WSPay	"gateway": "wspay" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
XPATE	"gateway": "xpate" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
xpay	"gateway": "xpaycomua" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
YIĞIM Payment System	"gateway": "yigim" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 沒有可用的開發人員說明文件
ЮKassa (YooKassa)	"gateway": "yoomoney" "gatewayMerchantId": "`YOUR_SHOP_ID`" 開發人員說明文件
Z-credit	"gateway": "zcredit" "gatewayMerchantId": "`YOUR_SHOP_ID`" 開發人員說明文件
ZEN.com	"gateway": "zen" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Zest	"gateway": "zestpayment" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件
Zuora	"gateway": "zuora" "gatewayMerchantId": "`YOUR_GATEWAY_MERCHANT_ID`" 開發人員說明文件

提示：example 在測試環境中為有效的閘道名稱。如想試用 API，您可以直接使用上方的程式碼範例，無須進行任何變更。使用 example 閘道時，您的網站不會收到可進行交易的卡片資料，但使用者流程看起來完全相同。

PAYMENT_GATEWAY 代碼化類型是商家最常在 Google Pay API 中實作的卡片付款方式。如果系統不支援您的付款服務供應商，您或許可以透過 DIRECT 整合的方式接受透過 Google Pay 付款。詳情請參閱直接權杖化說明文件。

步驟 3：定義支援的付款卡發卡機構

定義應用程式接受的發卡機構。

Kotlin

private val allowedCardNetworks = JSONArray(listOf(
        "AMEX",
        "DISCOVER",
        "INTERAC",
        "JCB",
        "MASTERCARD",
        "VISA"))

Java

private static JSONArray getAllowedCardNetworks() {
  return new JSONArray()
      .put("AMEX")
      .put("DISCOVER")
      .put("INTERAC")
      .put("JCB")
      .put("MASTERCARD")
      .put("VISA");
}

Google Pay API 可能會傳回在 Google.com 中已有記錄的卡片 (PAN_ONLY)，或傳回 Android 裝置上已透過 3-D 安全密文驗證的裝置權杖 (CRYPTOGRAM_3DS)。

Kotlin

private val allowedCardAuthMethods = JSONArray(listOf(
        "PAN_ONLY",
        "CRYPTOGRAM_3DS"))

Java

private static JSONArray getAllowedCardAuthMethods() {
  return new JSONArray()
      .put("PAN_ONLY")
      .put("CRYPTOGRAM_3DS");
}

詳情請參閱 JSON 物件參考資料中的 CardParameters。如要取得 Android 裝置權杖的相關支援，請洽詢閘道或處理方以確認支援的發卡機構。

步驟 4：說明允許的付款方式

為了說明應用程式對 CARD 付款方式的支援狀況，請結合支援的驗證方法和支援的發卡機構。

Kotlin

    private fun baseCardPaymentMethod(): JSONObject {
        return JSONObject().apply {

            val parameters = JSONObject().apply {
                put("allowedAuthMethods", allowedCardAuthMethods)
                put("allowedCardNetworks", allowedCardNetworks)
                put("billingAddressRequired", true)
                put("billingAddressParameters", JSONObject().apply {
                    put("format", "FULL")
                })
            }

            put("type", "CARD")
            put("parameters", parameters)
        }
    }PaymentsUtil.kt

Java

  private static JSONObject getBaseCardPaymentMethod() throws JSONException {
    JSONObject cardPaymentMethod = new JSONObject();
    cardPaymentMethod.put("type", "CARD");

    JSONObject parameters = new JSONObject();
    parameters.put("allowedAuthMethods", getAllowedCardAuthMethods());
    parameters.put("allowedCardNetworks", getAllowedCardNetworks());
    // Optionally, you can add billing address/phone number associated with a CARD payment method.
    parameters.put("billingAddressRequired", true);

    JSONObject billingAddressParameters = new JSONObject();
    billingAddressParameters.put("format", "FULL");

    parameters.put("billingAddressParameters", billingAddressParameters);

    cardPaymentMethod.put("parameters", parameters);

    return cardPaymentMethod;
  }PaymentsUtil.java

擴充基本卡片付款方式物件，以說明預期傳回至應用程式的資訊，其中必須包含權杖化付款資料。

Kotlin

    private fun cardPaymentMethod(): JSONObject {
        val cardPaymentMethod = baseCardPaymentMethod()
        cardPaymentMethod.put("tokenizationSpecification", gatewayTokenizationSpecification())

        return cardPaymentMethod
    }PaymentsUtil.kt

Java

  private static JSONObject getCardPaymentMethod() throws JSONException {
    JSONObject cardPaymentMethod = getBaseCardPaymentMethod();
    cardPaymentMethod.put("tokenizationSpecification", getGatewayTokenizationSpecification());

    return cardPaymentMethod;
  }PaymentsUtil.java

如要進一步瞭解支援的 parameters，請參閱 JSON 物件參考資料中的 CardParameters。

除了 CARD 之外，Google Pay 也支援 PAYPAL 付款方式。如要進一步瞭解如何將 PayPal 新增為 Google Pay 付款方式，請參閱 PayPal 的開發人員說明文件。

步驟 5：建立 PaymentsClient 執行個體

在 Activity 的 onCreate 方法中建立 PaymentsClient 執行個體。PaymentsClient 的用途是與 Google Pay API 互動。

Kotlin

    fun createPaymentsClient(activity: Activity): PaymentsClient {
        val walletOptions = Wallet.WalletOptions.Builder()
                .setEnvironment(Constants.PAYMENTS_ENVIRONMENT)
                .build()

        return Wallet.getPaymentsClient(activity, walletOptions)
    }PaymentsUtil.kt

Java

  public static PaymentsClient createPaymentsClient(Activity activity) {
    Wallet.WalletOptions walletOptions =
        new Wallet.WalletOptions.Builder().setEnvironment(Constants.PAYMENTS_ENVIRONMENT).build();
    return Wallet.getPaymentsClient(activity, walletOptions);
  }PaymentsUtil.java

步驟 6：判斷是否已準備好使用 Google Pay API 付款

使用下列程式碼片段，替基本要求物件新增允許的付款方式：

Kotlin

    fun isReadyToPayRequest(): JSONObject? {
        return try {
            baseRequest.apply {
                put("allowedPaymentMethods", JSONArray().put(baseCardPaymentMethod()))
            }

        } catch (e: JSONException) {
            null
        }
    }PaymentsUtil.kt

Java

  public static Optional<JSONObject> getIsReadyToPayRequest() {
    try {
      JSONObject isReadyToPayRequest = getBaseRequest();
      isReadyToPayRequest.put(
          "allowedPaymentMethods", new JSONArray().put(getBaseCardPaymentMethod()));

      return Optional.of(isReadyToPayRequest);

    } catch (JSONException e) {
      return Optional.empty();
    }
  }PaymentsUtil.java

在顯示 Google Pay 按鈕之前，請呼叫 isReadyToPay API，以判斷使用者是否能透過 Google Pay API 付款。如需完整的設定屬性清單，請參閱 IsReadyToPayRequest JSON 物件說明文件。

Kotlin

    private fun possiblyShowGooglePayButton() {

        val isReadyToPayJson = PaymentsUtil.isReadyToPayRequest() ?: return
        val request = IsReadyToPayRequest.fromJson(isReadyToPayJson.toString()) ?: return

        // The call to isReadyToPay is asynchronous and returns a Task. We need to provide an
        // OnCompleteListener to be triggered when the result of the call is known.
        val task = paymentsClient.isReadyToPay(request)
        task.addOnCompleteListener { completedTask ->
            try {
                completedTask.getResult(ApiException::class.java)?.let(::setGooglePayAvailable)
            } catch (exception: ApiException) {
                // Process error
                Log.w("isReadyToPay failed", exception)
            }
        }
    }CheckoutActivity.kt

Java

  private void possiblyShowGooglePayButton() {

    final Optional<JSONObject> isReadyToPayJson = PaymentsUtil.getIsReadyToPayRequest();
    if (!isReadyToPayJson.isPresent()) {
      return;
    }

    // The call to isReadyToPay is asynchronous and returns a Task. We need to provide an
    // OnCompleteListener to be triggered when the result of the call is known.
    IsReadyToPayRequest request = IsReadyToPayRequest.fromJson(isReadyToPayJson.get().toString());
    Task<Boolean> task = paymentsClient.isReadyToPay(request);
    task.addOnCompleteListener(this,
        new OnCompleteListener<Boolean>() {
          @Override
          public void onComplete(@NonNull Task<Boolean> task) {
            if (task.isSuccessful()) {
              setGooglePayAvailable(task.getResult());
            } else {
              Log.w("isReadyToPay failed", task.getException());
            }
          }
        });
  }CheckoutActivity.java

如範例所示，最好在收到來自 isReadyToPay 函式的成功結果後，才將 Google Pay 顯示為付款選項。實作付款選項時，在版面配置中透過 include 顯示 Google Pay 付款按鈕是最常見的做法。如要進一步瞭解應用程式可用的 Google Pay 付款按鈕、標誌和標記，請參閱品牌宣傳指南。

步驟 7：建立 PaymentDataRequest 物件

PaymentDataRequest JSON 物件會說明在 Google Pay 付款畫面中，要求付款人提供的資訊。

請提供交易價格和所提供價格的狀態相關資訊。詳情請參閱 TransactionInfo JSON 物件說明文件。

以下例子說明如何取得價格、價格狀態和幣別交易資訊。

重要事項：如果商家在歐洲經濟區 (EEA) 或採行嚴格客戶驗證 (SCA) 機制的任何其他國家/地區處理交易，則須加入 countryCode、totalPrice 和 merchantName 參數，以符合 SCA 規定。

Kotlin

    private fun getTransactionInfo(price: String): JSONObject {
        return JSONObject().apply {
            put("totalPrice", price)
            put("totalPriceStatus", "FINAL")
            put("countryCode", Constants.COUNTRY_CODE)
            put("currencyCode", Constants.CURRENCY_CODE)
        }
    }PaymentsUtil.kt

Java

  private static JSONObject getTransactionInfo(String price) throws JSONException {
    JSONObject transactionInfo = new JSONObject();
    transactionInfo.put("totalPrice", price);
    transactionInfo.put("totalPriceStatus", "FINAL");
    transactionInfo.put("countryCode", Constants.COUNTRY_CODE);
    transactionInfo.put("currencyCode", Constants.CURRENCY_CODE);
    transactionInfo.put("checkoutOption", "COMPLETE_IMMEDIATE_PURCHASE");

    return transactionInfo;
  }PaymentsUtil.java

提供可讓使用者查看的商家名稱。詳情請參閱 MerchantInfo JSON 物件說明文件。

以下範例顯示如何取得商家名稱：

Kotlin

private val merchantInfo: JSONObject =
        JSONObject().put("merchantName", "Example Merchant")

Java

  private static JSONObject getMerchantInfo() throws JSONException {
    return new JSONObject().put("merchantName", "Example Merchant");
  }PaymentsUtil.java

將基本要求物件指派給新的 PaymentDataRequest JSON 物件。接下來，請新增應用程式支援的付款方式，包括設定回應中應包含的任何其他資料。最後，請新增交易和提出要求商家的相關資訊。

以下範例說明如何要求付款資料：

Kotlin

fun getPaymentDataRequest(price: String): JSONObject? {
    try {
        return baseRequest.apply {
            put("allowedPaymentMethods", JSONArray().put(cardPaymentMethod()))
            put("transactionInfo", getTransactionInfo(price))
            put("merchantInfo", merchantInfo)

            // An optional shipping address requirement is a top-level property of the
            // PaymentDataRequest JSON object.
            val shippingAddressParameters = JSONObject().apply {
                put("phoneNumberRequired", false)
                put("allowedCountryCodes", JSONArray(listOf("US", "GB")))
            }
            put("shippingAddressParameters", shippingAddressParameters)
            put("shippingAddressRequired", true)
        }
    } catch (e: JSONException) {
        return null
    }
}

Java

  public static Optional<JSONObject> getPaymentDataRequest(long priceCents) {

    final String price = PaymentsUtil.centsToString(priceCents);

    try {
      JSONObject paymentDataRequest = PaymentsUtil.getBaseRequest();
      paymentDataRequest.put(
          "allowedPaymentMethods", new JSONArray().put(PaymentsUtil.getCardPaymentMethod()));
      paymentDataRequest.put("transactionInfo", PaymentsUtil.getTransactionInfo(price));
      paymentDataRequest.put("merchantInfo", PaymentsUtil.getMerchantInfo());

      /* An optional shipping address requirement is a top-level property of the PaymentDataRequest
      JSON object. */
      paymentDataRequest.put("shippingAddressRequired", true);

      JSONObject shippingAddressParameters = new JSONObject();
      shippingAddressParameters.put("phoneNumberRequired", false);

      JSONArray allowedCountryCodes = new JSONArray(Constants.SHIPPING_SUPPORTED_COUNTRIES);

      shippingAddressParameters.put("allowedCountryCodes", allowedCountryCodes);
      paymentDataRequest.put("shippingAddressParameters", shippingAddressParameters);
      return Optional.of(paymentDataRequest);

    } catch (JSONException e) {
      return Optional.empty();
    }
  }PaymentsUtil.java

詳情請參閱 PaymentDataRequest JSON 物件說明文件。

步驟 8：針對使用者手勢註冊事件處理常式

如要在使用者啟用 Google Pay 付款按鈕後顯示 Google Pay 付款畫面，請定義 OnClickListener。

Kotlin

        googlePayButton.setOnClickListener { requestPayment() }CheckoutActivity.kt

Java

    googlePayButton.setOnClickListener(
        new View.OnClickListener() {
          @Override
          public void onClick(View view) {
            requestPayment(view);
          }
        });CheckoutActivity.java

PaymentDataRequest 物件是代表付款資料要求的 Parcelable。PaymentDataRequest 會提供支援付款所需的資訊。使用 AutoResolveHelper 類別自動解析 Task，然後再處理 Activity 類別中 onActivityResult 方法的結果。

步驟 9：處理回應物件

當付款人成功在 Google Pay 付款畫面中提供要求的資訊後，系統就會將 PaymentData 物件傳回給 onActivityResult。

如要將付款資訊傳送至處理方，並向使用者顯示確認購買的訊息，請將成功的回應轉換為 JSON。如果傳送至 PaymentDataRequest 的 transactionInfo.totalPriceStatus 是 ESTIMATED，你必須先顯示最終價格，才能向傳回的付款方式扣款。

擷取 paymentData 回應中的付款代碼。如果你執行了閘道整合，請將這個權杖傳送至閘道，不要進行任何修改。

Kotlin

    public override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        when (requestCode) {
            // Value passed in AutoResolveHelper
            LOAD_PAYMENT_DATA_REQUEST_CODE -> {
                when (resultCode) {
                    RESULT_OK ->
                        data?.let { intent ->
                            PaymentData.getFromIntent(intent)?.let(::handlePaymentSuccess)
                        }

                    RESULT_CANCELED -> {
                        // The user cancelled the payment attempt
                    }

                    AutoResolveHelper.RESULT_ERROR -> {
                        AutoResolveHelper.getStatusFromIntent(data)?.let {
                            handleError(it.statusCode)
                        }
                    }
                }

                // Re-enables the Google Pay payment button.
                googlePayButton.isClickable = true
            }
        }
    }CheckoutActivity.kt

Java

  public void onActivityResult(int requestCode, int resultCode, Intent data) {
    switch (requestCode) {
      // value passed in AutoResolveHelper
      case LOAD_PAYMENT_DATA_REQUEST_CODE:
        switch (resultCode) {

          case Activity.RESULT_OK:
            PaymentData paymentData = PaymentData.getFromIntent(data);
            handlePaymentSuccess(paymentData);
            break;

          case Activity.RESULT_CANCELED:
            // The user cancelled the payment attempt
            break;

          case AutoResolveHelper.RESULT_ERROR:
            Status status = AutoResolveHelper.getStatusFromIntent(data);
            handleError(status.getStatusCode());
            break;
        }

        // Re-enables the Google Pay payment button.
        googlePayButton.setClickable(true);
    }
  }CheckoutActivity.java

如要進一步瞭解回應的內容和結構，請參閱 PaymentData JSON 物件參考資料。

完整的實作範例

下列程式碼片段顯示了正確設定的完整專案範例。如需專案層級的設定步驟，請參閱設定專案一節。

CheckoutActivity.kt (Kotlin)

範例 Activity 假設你的版面配置中含有 id 屬性為 googlepay_button 的 Google Pay 付款按鈕。

/*
 * Copyright 2018 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.android.gms.samples.wallet.activity

import android.app.Activity
import android.content.Intent
import android.os.Bundle
import android.text.Html
import android.util.Log
import android.view.View
import android.widget.Toast
import com.google.android.gms.common.api.ApiException
import com.google.android.gms.samples.wallet.util.PaymentsUtil
import com.google.android.gms.samples.wallet.R
import com.google.android.gms.samples.wallet.util.Json
import com.google.android.gms.wallet.*
import kotlinx.android.synthetic.main.activity_checkout.*
import org.json.JSONArray
import org.json.JSONException
import org.json.JSONObject

/**
 * Checkout implementation for the app
 */
class CheckoutActivity : Activity() {

    private val SHIPPING_COST_CENTS = 9 * PaymentsUtil.CENTS.toLong()

    /**
     * A client for interacting with the Google Pay API.
     *
     * @see [PaymentsClient](https://developers.google.com/android/reference/com/google/android/gms/wallet/PaymentsClient)
     */
    private lateinit var paymentsClient: PaymentsClient

    private lateinit var garmentList: JSONArray
    private lateinit var selectedGarment: JSONObject

    /**
     * Arbitrarily-picked constant integer you define to track a request for payment data activity.
     *
     * @value #LOAD_PAYMENT_DATA_REQUEST_CODE
     */
    private val LOAD_PAYMENT_DATA_REQUEST_CODE = 991

    /**
     * Initialize the Google Pay API on creation of the activity
     *
     * @see Activity.onCreate
     */
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_checkout)

        // Set up the mock information for our item in the UI.
        selectedGarment = fetchRandomGarment()
        displayGarment(selectedGarment)

        // Initialize a Google Pay API client for an environment suitable for testing.
        // It's recommended to create the PaymentsClient object inside of the onCreate method.
        paymentsClient = PaymentsUtil.createPaymentsClient(this)
        possiblyShowGooglePayButton()

        googlePayButton.setOnClickListener { requestPayment() }
    }

    /**
     * Determine the viewer's ability to pay with a payment method supported by your app and display a
     * Google Pay payment button.
     *
     * @see [](https://developers.google.com/android/reference/com/google/android/gms/wallet/PaymentsClient.html.isReadyToPay
    ) */
    private fun possiblyShowGooglePayButton() {

        val isReadyToPayJson = PaymentsUtil.isReadyToPayRequest() ?: return
        val request = IsReadyToPayRequest.fromJson(isReadyToPayJson.toString()) ?: return

        // The call to isReadyToPay is asynchronous and returns a Task. We need to provide an
        // OnCompleteListener to be triggered when the result of the call is known.
        val task = paymentsClient.isReadyToPay(request)
        task.addOnCompleteListener { completedTask ->
            try {
                completedTask.getResult(ApiException::class.java)?.let(::setGooglePayAvailable)
            } catch (exception: ApiException) {
                // Process error
                Log.w("isReadyToPay failed", exception)
            }
        }
    }

    /**
     * If isReadyToPay returned `true`, show the button and hide the "checking" text. Otherwise,
     * notify the user that Google Pay is not available. Please adjust to fit in with your current
     * user flow. You are not required to explicitly let the user know if isReadyToPay returns `false`.
     *
     * @param available isReadyToPay API response.
     */
    private fun setGooglePayAvailable(available: Boolean) {
        if (available) {
            googlePayButton.visibility = View.VISIBLE
        } else {
            Toast.makeText(
                    this,
                    "Unfortunately, Google Pay is not available on this device",
                    Toast.LENGTH_LONG).show();
        }
    }

    private fun requestPayment() {

        // Disables the button to prevent multiple clicks.
        googlePayButton.isClickable = false

        // The price provided to the API should include taxes and shipping.
        // This price is not displayed to the user.
        val garmentPrice = selectedGarment.getDouble("price")
        val priceCents = Math.round(garmentPrice * PaymentsUtil.CENTS.toLong()) + SHIPPING_COST_CENTS

        val paymentDataRequestJson = PaymentsUtil.getPaymentDataRequest(priceCents)
        if (paymentDataRequestJson == null) {
            Log.e("RequestPayment", "Can't fetch payment data request")
            return
        }
        val request = PaymentDataRequest.fromJson(paymentDataRequestJson.toString())

        // Since loadPaymentData may show the UI asking the user to select a payment method, we use
        // AutoResolveHelper to wait for the user interacting with it. Once completed,
        // onActivityResult will be called with the result.
        if (request != null) {
            AutoResolveHelper.resolveTask(
                    paymentsClient.loadPaymentData(request), this, LOAD_PAYMENT_DATA_REQUEST_CODE)
        }
    }

    /**
     * Handle a resolved activity from the Google Pay payment sheet.
     *
     * @param requestCode Request code originally supplied to AutoResolveHelper in requestPayment().
     * @param resultCode Result code returned by the Google Pay API.
     * @param data Intent from the Google Pay API containing payment or error data.
     * @see [Getting a result
     * from an Activity](https://developer.android.com/training/basics/intents/result)
     */
    public override fun onActivityResult(requestCode: Int, resultCode: Int, data: Intent?) {
        when (requestCode) {
            // Value passed in AutoResolveHelper
            LOAD_PAYMENT_DATA_REQUEST_CODE -> {
                when (resultCode) {
                    RESULT_OK ->
                        data?.let { intent ->
                            PaymentData.getFromIntent(intent)?.let(::handlePaymentSuccess)
                        }

                    RESULT_CANCELED -> {
                        // The user cancelled the payment attempt
                    }

                    AutoResolveHelper.RESULT_ERROR -> {
                        AutoResolveHelper.getStatusFromIntent(data)?.let {
                            handleError(it.statusCode)
                        }
                    }
                }

                // Re-enables the Google Pay payment button.
                googlePayButton.isClickable = true
            }
        }
    }

    /**
     * PaymentData response object contains the payment information, as well as any additional
     * requested information, such as billing and shipping address.
     *
     * @param paymentData A response object returned by Google after a payer approves payment.
     * @see [Payment
     * Data](https://developers.google.com/pay/api/android/reference/object.PaymentData)
     */
    private fun handlePaymentSuccess(paymentData: PaymentData) {
        val paymentInformation = paymentData.toJson() ?: return

        try {
            // Token will be null if PaymentDataRequest was not constructed using fromJson(String).
            val paymentMethodData = JSONObject(paymentInformation).getJSONObject("paymentMethodData")
            val billingName = paymentMethodData.getJSONObject("info")
                    .getJSONObject("billingAddress").getString("name")
            Log.d("BillingName", billingName)

            Toast.makeText(this, getString(R.string.payments_show_name, billingName), Toast.LENGTH_LONG).show()

            // Logging token string.
            Log.d("GooglePaymentToken", paymentMethodData
                    .getJSONObject("tokenizationData")
                    .getString("token"))

        } catch (e: JSONException) {
            Log.e("handlePaymentSuccess", "Error: " + e.toString())
        }

    }

    /**
     * At this stage, the user has already seen a popup informing them an error occurred. Normally,
     * only logging is required.
     *
     * @param statusCode will hold the value of any constant from CommonStatusCode or one of the
     * WalletConstants.ERROR_CODE_* constants.
     * @see [
     * Wallet Constants Library](https://developers.google.com/android/reference/com/google/android/gms/wallet/WalletConstants.constant-summary)
     */
    private fun handleError(statusCode: Int) {
        Log.w("loadPaymentData failed", String.format("Error code: %d", statusCode))
    }

    private fun fetchRandomGarment() : JSONObject {
        if (!::garmentList.isInitialized) {
            garmentList = Json.readFromResources(this, R.raw.tshirts)
        }

        val randomIndex:Int = Math.round(Math.random() * (garmentList.length() - 1)).toInt()
        return garmentList.getJSONObject(randomIndex)
    }

    private fun displayGarment(garment:JSONObject) {
        detailTitle.setText(garment.getString("title"))
        detailPrice.setText("\$${garment.getString("price")}")

        val escapedHtmlText:String = Html.fromHtml(garment.getString("description")).toString()
        detailDescription.setText(Html.fromHtml(escapedHtmlText))

        val imageUri = "@drawable/${garment.getString("image")}"
        val imageResource = resources.getIdentifier(imageUri, null, packageName)
        detailImage.setImageResource(imageResource)
    }
}
CheckoutActivity.kt

PaymentsUtil.kt (Kotlin)

這個範例檔案會建構適合建立 IsReadyToPayRequest 或 PaymentDataRequest 的 JSON 物件。

/*
 * Copyright 2017 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.android.gms.samples.wallet.util

import android.app.Activity
import com.google.android.gms.samples.wallet.Constants
import com.google.android.gms.wallet.PaymentsClient
import com.google.android.gms.wallet.Wallet
import org.json.JSONArray
import org.json.JSONException
import org.json.JSONObject
import java.math.BigDecimal
import java.math.RoundingMode

/**
 * Contains helper static methods for dealing with the Payments API.
 *
 * Many of the parameters used in the code are optional and are set here merely to call out their
 * existence. Please consult the documentation to learn more and feel free to remove ones not
 * relevant to your implementation.
 */
object PaymentsUtil {
    val CENTS = BigDecimal(100)

    /**
     * Create a Google Pay API base request object with properties used in all requests.
     *
     * @return Google Pay API base request object.
     * @throws JSONException
     */
    private val baseRequest = JSONObject().apply {
        put("apiVersion", 2)
        put("apiVersionMinor", 0)
    }

    /**
     * Gateway Integration: Identify your gateway and your app's gateway merchant identifier.
     *
     *
     * The Google Pay API response will return an encrypted payment method capable of being charged
     * by a supported gateway after payer authorization.
     *
     *
     * TODO: Check with your gateway on the parameters to pass and modify them in Constants.java.
     *
     * @return Payment data tokenization for the CARD payment method.
     * @throws JSONException
     * @see [PaymentMethodTokenizationSpecification](https://developers.google.com/pay/api/android/reference/object.PaymentMethodTokenizationSpecification)
     */
    private fun gatewayTokenizationSpecification(): JSONObject {
        return JSONObject().apply {
            put("type", "PAYMENT_GATEWAY")
            put("parameters", JSONObject(Constants.PAYMENT_GATEWAY_TOKENIZATION_PARAMETERS))
        }
    }

    /**
     * `DIRECT` Integration: Decrypt a response directly on your servers. This configuration has
     * additional data security requirements from Google and additional PCI DSS compliance complexity.
     *
     *
     * Please refer to the documentation for more information about `DIRECT` integration. The
     * type of integration you use depends on your payment processor.
     *
     * @return Payment data tokenization for the CARD payment method.
     * @throws JSONException
     * @see [PaymentMethodTokenizationSpecification](https://developers.google.com/pay/api/android/reference/object.PaymentMethodTokenizationSpecification)
     */
    private fun directTokenizationSpecification(): JSONObject {
        if (Constants.DIRECT_TOKENIZATION_PUBLIC_KEY == "REPLACE_ME" ||
                (Constants.DIRECT_TOKENIZATION_PARAMETERS.isEmpty() ||
                 Constants.DIRECT_TOKENIZATION_PUBLIC_KEY.isEmpty())) {

            throw RuntimeException(
                    "Please edit the Constants.java file to add protocol version & public key.")
        }

        return JSONObject().apply {
            put("type", "DIRECT")
            put("parameters", JSONObject(Constants.DIRECT_TOKENIZATION_PARAMETERS))
        }
    }

    /**
     * Card networks supported by your app and your gateway.
     *
     *
     * TODO: Confirm card networks supported by your app and gateway & update in Constants.java.
     *
     * @return Allowed card networks
     * @see [CardParameters](https://developers.google.com/pay/api/android/reference/object.CardParameters)
     */
    private val allowedCardNetworks = JSONArray(Constants.SUPPORTED_NETWORKS)

    /**
     * Card authentication methods supported by your app and your gateway.
     *
     *
     * TODO: Confirm your processor supports Android device tokens on your supported card networks
     * and make updates in Constants.java.
     *
     * @return Allowed card authentication methods.
     * @see [CardParameters](https://developers.google.com/pay/api/android/reference/object.CardParameters)
     */
    private val allowedCardAuthMethods = JSONArray(Constants.SUPPORTED_METHODS)

    /**
     * Describe your app's support for the CARD payment method.
     *
     *
     * The provided properties are applicable to both an IsReadyToPayRequest and a
     * PaymentDataRequest.
     *
     * @return A CARD PaymentMethod object describing accepted cards.
     * @throws JSONException
     * @see [PaymentMethod](https://developers.google.com/pay/api/android/reference/object.PaymentMethod)
     */
    // Optionally, you can add billing address/phone number associated with a CARD payment method.
    private fun baseCardPaymentMethod(): JSONObject {
        return JSONObject().apply {

            val parameters = JSONObject().apply {
                put("allowedAuthMethods", allowedCardAuthMethods)
                put("allowedCardNetworks", allowedCardNetworks)
                put("billingAddressRequired", true)
                put("billingAddressParameters", JSONObject().apply {
                    put("format", "FULL")
                })
            }

            put("type", "CARD")
            put("parameters", parameters)
        }
    }

    /**
     * Describe the expected returned payment data for the CARD payment method
     *
     * @return A CARD PaymentMethod describing accepted cards and optional fields.
     * @throws JSONException
     * @see [PaymentMethod](https://developers.google.com/pay/api/android/reference/object.PaymentMethod)
     */
    private fun cardPaymentMethod(): JSONObject {
        val cardPaymentMethod = baseCardPaymentMethod()
        cardPaymentMethod.put("tokenizationSpecification", gatewayTokenizationSpecification())

        return cardPaymentMethod
    }

    /**
     * An object describing accepted forms of payment by your app, used to determine a viewer's
     * readiness to pay.
     *
     * @return API version and payment methods supported by the app.
     * @see [IsReadyToPayRequest](https://developers.google.com/pay/api/android/reference/object.IsReadyToPayRequest)
     */
    fun isReadyToPayRequest(): JSONObject? {
        return try {
            baseRequest.apply {
                put("allowedPaymentMethods", JSONArray().put(baseCardPaymentMethod()))
            }

        } catch (e: JSONException) {
            null
        }
    }

    /**
     * Information about the merchant requesting payment information
     *
     * @return Information about the merchant.
     * @throws JSONException
     * @see [MerchantInfo](https://developers.google.com/pay/api/android/reference/object.MerchantInfo)
     */
    private val merchantInfo: JSONObject =
            JSONObject().put("merchantName", "Example Merchant")

    /**
     * Creates an instance of [PaymentsClient] for use in an [Activity] using the
     * environment and theme set in [Constants].
     *
     * @param activity is the caller's activity.
     */
    fun createPaymentsClient(activity: Activity): PaymentsClient {
        val walletOptions = Wallet.WalletOptions.Builder()
                .setEnvironment(Constants.PAYMENTS_ENVIRONMENT)
                .build()

        return Wallet.getPaymentsClient(activity, walletOptions)
    }

    /**
     * Provide Google Pay API with a payment amount, currency, and amount status.
     *
     * @return information about the requested payment.
     * @throws JSONException
     * @see [TransactionInfo](https://developers.google.com/pay/api/android/reference/object.TransactionInfo)
     */
    @Throws(JSONException::class)
    private fun getTransactionInfo(price: String): JSONObject {
        return JSONObject().apply {
            put("totalPrice", price)
            put("totalPriceStatus", "FINAL")
            put("countryCode", Constants.COUNTRY_CODE)
            put("currencyCode", Constants.CURRENCY_CODE)
        }
    }

    /**
     * An object describing information requested in a Google Pay payment sheet
     *
     * @return Payment data expected by your app.
     * @see [PaymentDataRequest](https://developers.google.com/pay/api/android/reference/object.PaymentDataRequest)
     */
    fun getPaymentDataRequest(priceCemts: Long): JSONObject? {
        return try {
            baseRequest.apply {
                put("allowedPaymentMethods", JSONArray().put(cardPaymentMethod()))
                put("transactionInfo", getTransactionInfo(priceCemts.centsToString()))
                put("merchantInfo", merchantInfo)

                // An optional shipping address requirement is a top-level property of the
                // PaymentDataRequest JSON object.
                val shippingAddressParameters = JSONObject().apply {
                    put("phoneNumberRequired", false)
                    put("allowedCountryCodes", JSONArray(listOf("US", "GB")))
                }
                put("shippingAddressParameters", shippingAddressParameters)
                put("shippingAddressRequired", true)
            }
        } catch (e: JSONException) {
            null
        }
    }
}

/**
 * Converts cents to a string format accepted by [PaymentsUtil.getPaymentDataRequest].
 *
 * @param cents value of the price.
 */
fun Long.centsToString() = BigDecimal(this)
        .divide(PaymentsUtil.CENTS)
        .setScale(2, RoundingMode.HALF_EVEN)
        .toString()
PaymentsUtil.kt

CheckoutActivity.java (Java)

範例 Activity 假設你的版面配置中含有 id 屬性為 googlepay_button 的 Google Pay 付款按鈕。

/*
 * Copyright 2020 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.android.gms.samples.wallet.activity;

import android.app.Activity;
import android.content.Intent;
import android.os.Bundle;
import android.text.Html;
import android.util.Log;
import android.view.View;
import android.widget.Toast;

import com.google.android.gms.common.api.Status;
import com.google.android.gms.samples.wallet.databinding.ActivityCheckoutBinding;
import com.google.android.gms.samples.wallet.util.PaymentsUtil;
import com.google.android.gms.samples.wallet.R;
import com.google.android.gms.samples.wallet.util.Json;
import com.google.android.gms.tasks.OnCompleteListener;
import com.google.android.gms.tasks.Task;
import com.google.android.gms.wallet.AutoResolveHelper;
import com.google.android.gms.wallet.IsReadyToPayRequest;
import com.google.android.gms.wallet.PaymentData;
import com.google.android.gms.wallet.PaymentDataRequest;
import com.google.android.gms.wallet.PaymentsClient;

import java.util.Locale;
import java.util.Optional;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import androidx.annotation.NonNull;
import androidx.appcompat.app.AppCompatActivity;

/**
 * Checkout implementation for the app
 */
public class CheckoutActivity extends AppCompatActivity {

  // Arbitrarily-picked constant integer you define to track a request for payment data activity.
  private static final int LOAD_PAYMENT_DATA_REQUEST_CODE = 991;

  private static final long SHIPPING_COST_CENTS = 90 * PaymentsUtil.CENTS_IN_A_UNIT.longValue();

  // A client for interacting with the Google Pay API.
  private PaymentsClient paymentsClient;

  private ActivityCheckoutBinding layoutBinding;
  private View googlePayButton;

  private JSONArray garmentList;
  private JSONObject selectedGarment;

  /**
   * Initialize the Google Pay API on creation of the activity
   *
   * @see Activity#onCreate(android.os.Bundle)
   */
  @Override
  protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    initializeUi();

    // Set up the mock information for our item in the UI.
    try {
      selectedGarment = fetchRandomGarment();
      displayGarment(selectedGarment);
    } catch (JSONException e) {
      throw new RuntimeException("The list of garments cannot be loaded");
    }

    // Initialize a Google Pay API client for an environment suitable for testing.
    // It's recommended to create the PaymentsClient object inside of the onCreate method.
    paymentsClient = PaymentsUtil.createPaymentsClient(this);
    possiblyShowGooglePayButton();
  }

  /**
   * Handle a resolved activity from the Google Pay payment sheet.
   *
   * @param requestCode Request code originally supplied to AutoResolveHelper in requestPayment().
   * @param resultCode  Result code returned by the Google Pay API.
   * @param data        Intent from the Google Pay API containing payment or error data.
   * @see <a href="https://developer.android.com/training/basics/intents/result">Getting a result
   * from an Activity</a>
   */
  @Override
  public void onActivityResult(int requestCode, int resultCode, Intent data) {
    switch (requestCode) {
      // value passed in AutoResolveHelper
      case LOAD_PAYMENT_DATA_REQUEST_CODE:
        switch (resultCode) {

          case Activity.RESULT_OK:
            PaymentData paymentData = PaymentData.getFromIntent(data);
            handlePaymentSuccess(paymentData);
            break;

          case Activity.RESULT_CANCELED:
            // The user cancelled the payment attempt
            break;

          case AutoResolveHelper.RESULT_ERROR:
            Status status = AutoResolveHelper.getStatusFromIntent(data);
            handleError(status.getStatusCode());
            break;
        }

        // Re-enables the Google Pay payment button.
        googlePayButton.setClickable(true);
    }
  }

  private void initializeUi() {

    // Use view binding to access the UI elements
    layoutBinding = ActivityCheckoutBinding.inflate(getLayoutInflater());
    setContentView(layoutBinding.getRoot());

    // The Google Pay button is a layout file – take the root view
    googlePayButton = layoutBinding.googlePayButton.getRoot();
    googlePayButton.setOnClickListener(
        new View.OnClickListener() {
          @Override
          public void onClick(View view) {
            requestPayment(view);
          }
        });
  }

  private void displayGarment(JSONObject garment) throws JSONException {
    layoutBinding.detailTitle.setText(garment.getString("title"));
    layoutBinding.detailPrice.setText(
        String.format(Locale.getDefault(), "$%.2f", garment.getDouble("price")));

    final String escapedHtmlText = Html.fromHtml(
        garment.getString("description"), Html.FROM_HTML_MODE_COMPACT).toString();
    layoutBinding.detailDescription.setText(Html.fromHtml(
        escapedHtmlText, Html.FROM_HTML_MODE_COMPACT));

    final String imageUri = String.format("@drawable/%s", garment.getString("image"));
    final int imageResource = getResources().getIdentifier(imageUri, null, getPackageName());
    layoutBinding.detailImage.setImageResource(imageResource);
  }

  /**
   * Determine the viewer's ability to pay with a payment method supported by your app and display a
   * Google Pay payment button.
   *
   * @see <a href="https://developers.google.com/android/reference/com/google/android/gms/wallet/
   * PaymentsClient.html#isReadyToPay(com.google.android.gms.wallet.
   * IsReadyToPayRequest)">PaymentsClient#IsReadyToPay</a>
   */
  private void possiblyShowGooglePayButton() {

    final Optional<JSONObject> isReadyToPayJson = PaymentsUtil.getIsReadyToPayRequest();
    if (!isReadyToPayJson.isPresent()) {
      return;
    }

    // The call to isReadyToPay is asynchronous and returns a Task. We need to provide an
    // OnCompleteListener to be triggered when the result of the call is known.
    IsReadyToPayRequest request = IsReadyToPayRequest.fromJson(isReadyToPayJson.get().toString());
    Task<Boolean> task = paymentsClient.isReadyToPay(request);
    task.addOnCompleteListener(this,
        new OnCompleteListener<Boolean>() {
          @Override
          public void onComplete(@NonNull Task<Boolean> task) {
            if (task.isSuccessful()) {
              setGooglePayAvailable(task.getResult());
            } else {
              Log.w("isReadyToPay failed", task.getException());
            }
          }
        });
  }

  /**
   * If isReadyToPay returned {@code true}, show the button and hide the "checking" text. Otherwise,
   * notify the user that Google Pay is not available. Please adjust to fit in with your current
   * user flow. You are not required to explicitly let the user know if isReadyToPay returns {@code
   * false}.
   *
   * @param available isReadyToPay API response.
   */
  private void setGooglePayAvailable(boolean available) {
    if (available) {
      googlePayButton.setVisibility(View.VISIBLE);
    } else {
      Toast.makeText(this, R.string.googlepay_status_unavailable, Toast.LENGTH_LONG).show();
    }
  }

  /**
   * PaymentData response object contains the payment information, as well as any additional
   * requested information, such as billing and shipping address.
   *
   * @param paymentData A response object returned by Google after a payer approves payment.
   * @see <a href="https://developers.google.com/pay/api/android/reference/
   * object#PaymentData">PaymentData</a>
   */
  private void handlePaymentSuccess(PaymentData paymentData) {

    // Token will be null if PaymentDataRequest was not constructed using fromJson(String).
    final String paymentInfo = paymentData.toJson();
    if (paymentInfo == null) {
      return;
    }

    try {
      JSONObject paymentMethodData = new JSONObject(paymentInfo).getJSONObject("paymentMethodData");
      // If the gateway is set to "example", no payment information is returned - instead, the
      // token will only consist of "examplePaymentMethodToken".

      final JSONObject tokenizationData = paymentMethodData.getJSONObject("tokenizationData");
      final String token = tokenizationData.getString("token");
      final JSONObject info = paymentMethodData.getJSONObject("info");
      final String billingName = info.getJSONObject("billingAddress").getString("name");
      Toast.makeText(
          this, getString(R.string.payments_show_name, billingName),
          Toast.LENGTH_LONG).show();

      // Logging token string.
      Log.d("Google Pay token: ", token);

    } catch (JSONException e) {
      throw new RuntimeException("The selected garment cannot be parsed from the list of elements");
    }
  }

  /**
   * At this stage, the user has already seen a popup informing them an error occurred. Normally,
   * only logging is required.
   *
   * @param statusCode will hold the value of any constant from CommonStatusCode or one of the
   *                   WalletConstants.ERROR_CODE_* constants.
   * @see <a href="https://developers.google.com/android/reference/com/google/android/gms/wallet/
   * WalletConstants#constant-summary">Wallet Constants Library</a>
   */
  private void handleError(int statusCode) {
    Log.e("loadPaymentData failed", String.format("Error code: %d", statusCode));
  }

  public void requestPayment(View view) {

    // Disables the button to prevent multiple clicks.
    googlePayButton.setClickable(false);

    // The price provided to the API should include taxes and shipping.
    // This price is not displayed to the user.
    try {
      double garmentPrice = selectedGarment.getDouble("price");
      long garmentPriceCents = Math.round(garmentPrice * PaymentsUtil.CENTS_IN_A_UNIT.longValue());
      long priceCents = garmentPriceCents + SHIPPING_COST_CENTS;

      Optional<JSONObject> paymentDataRequestJson = PaymentsUtil.getPaymentDataRequest(priceCents);
      if (!paymentDataRequestJson.isPresent()) {
        return;
      }

      PaymentDataRequest request =
          PaymentDataRequest.fromJson(paymentDataRequestJson.get().toString());

      // Since loadPaymentData may show the UI asking the user to select a payment method, we use
      // AutoResolveHelper to wait for the user interacting with it. Once completed,
      // onActivityResult will be called with the result.
      if (request != null) {
        AutoResolveHelper.resolveTask(
            paymentsClient.loadPaymentData(request),
            this, LOAD_PAYMENT_DATA_REQUEST_CODE);
      }

    } catch (JSONException e) {
      throw new RuntimeException("The price cannot be deserialized from the JSON object.");
    }
  }

  private JSONObject fetchRandomGarment() {

    // Only load the list of items if it has not been loaded before
    if (garmentList == null) {
      garmentList = Json.readFromResources(this, R.raw.tshirts);
    }

    // Take a random element from the list
    int randomIndex = Math.toIntExact(Math.round(Math.random() * (garmentList.length() - 1)));
    try {
      return garmentList.getJSONObject(randomIndex);
    } catch (JSONException e) {
      throw new RuntimeException("The index specified is out of bounds.");
    }
  }
}
CheckoutActivity.java

PaymentsUtil.java (Java)

這個範例檔案會建構適合建立 IsReadyToPayRequest 或 PaymentDataRequest 的 JSON 物件。

/*
 * Copyright 2020 Google Inc.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package com.google.android.gms.samples.wallet.util;

import android.app.Activity;

import com.google.android.gms.samples.wallet.Constants;
import com.google.android.gms.wallet.PaymentsClient;
import com.google.android.gms.wallet.Wallet;

import java.math.BigDecimal;
import java.math.RoundingMode;
import java.util.Optional;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

/**
 * Contains helper static methods for dealing with the Payments API.
 *
 * <p>Many of the parameters used in the code are optional and are set here merely to call out their
 * existence. Please consult the documentation to learn more and feel free to remove ones not
 * relevant to your implementation.
 */
public class PaymentsUtil {

  public static final BigDecimal CENTS_IN_A_UNIT = new BigDecimal(100d);

  /**
   * Create a Google Pay API base request object with properties used in all requests.
   *
   * @return Google Pay API base request object.
   * @throws JSONException
   */
  private static JSONObject getBaseRequest() throws JSONException {
    return new JSONObject().put("apiVersion", 2).put("apiVersionMinor", 0);
  }

  /**
   * Creates an instance of {@link PaymentsClient} for use in an {@link Activity} using the
   * environment and theme set in {@link Constants}.
   *
   * @param activity is the caller's activity.
   */
  public static PaymentsClient createPaymentsClient(Activity activity) {
    Wallet.WalletOptions walletOptions =
        new Wallet.WalletOptions.Builder().setEnvironment(Constants.PAYMENTS_ENVIRONMENT).build();
    return Wallet.getPaymentsClient(activity, walletOptions);
  }

  /**
   * Gateway Integration: Identify your gateway and your app's gateway merchant identifier.
   *
   * <p>The Google Pay API response will return an encrypted payment method capable of being charged
   * by a supported gateway after payer authorization.
   *
   * <p>TODO: Check with your gateway on the parameters to pass and modify them in Constants.java.
   *
   * @return Payment data tokenization for the CARD payment method.
   * @throws JSONException
   * @see <a href=
   * "https://developers.google.com/pay/api/android/reference/object#PaymentMethodTokenizationSpecification">PaymentMethodTokenizationSpecification</a>
   */
  private static JSONObject getGatewayTokenizationSpecification() throws JSONException {
    return new JSONObject() {{
      put("type", "PAYMENT_GATEWAY");
      put("parameters", new JSONObject() {{
        put("gateway", "example");
        put("gatewayMerchantId", "exampleGatewayMerchantId");
      }});
    }};
  }

  /**
   * {@code DIRECT} Integration: Decrypt a response directly on your servers. This configuration has
   * additional data security requirements from Google and additional PCI DSS compliance complexity.
   *
   * <p>Please refer to the documentation for more information about {@code DIRECT} integration. The
   * type of integration you use depends on your payment processor.
   *
   * @return Payment data tokenization for the CARD payment method.
   * @throws JSONException
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#PaymentMethodTokenizationSpecification">PaymentMethodTokenizationSpecification</a>
   */
  private static JSONObject getDirectTokenizationSpecification()
      throws JSONException, RuntimeException {
    if (Constants.DIRECT_TOKENIZATION_PARAMETERS.isEmpty()
        || Constants.DIRECT_TOKENIZATION_PUBLIC_KEY.isEmpty()
        || Constants.DIRECT_TOKENIZATION_PUBLIC_KEY == null
        || Constants.DIRECT_TOKENIZATION_PUBLIC_KEY == "REPLACE_ME") {
      throw new RuntimeException(
          "Please edit the Constants.java file to add protocol version & public key.");
    }
    JSONObject tokenizationSpecification = new JSONObject();

    tokenizationSpecification.put("type", "DIRECT");
    JSONObject parameters = new JSONObject(Constants.DIRECT_TOKENIZATION_PARAMETERS);
    tokenizationSpecification.put("parameters", parameters);

    return tokenizationSpecification;
  }

  /**
   * Card networks supported by your app and your gateway.
   *
   * <p>TODO: Confirm card networks supported by your app and gateway & update in Constants.java.
   *
   * @return Allowed card networks
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#CardParameters">CardParameters</a>
   */
  private static JSONArray getAllowedCardNetworks() {
    return new JSONArray(Constants.SUPPORTED_NETWORKS);
  }

  /**
   * Card authentication methods supported by your app and your gateway.
   *
   * <p>TODO: Confirm your processor supports Android device tokens on your supported card networks
   * and make updates in Constants.java.
   *
   * @return Allowed card authentication methods.
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#CardParameters">CardParameters</a>
   */
  private static JSONArray getAllowedCardAuthMethods() {
    return new JSONArray(Constants.SUPPORTED_METHODS);
  }

  /**
   * Describe your app's support for the CARD payment method.
   *
   * <p>The provided properties are applicable to both an IsReadyToPayRequest and a
   * PaymentDataRequest.
   *
   * @return A CARD PaymentMethod object describing accepted cards.
   * @throws JSONException
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#PaymentMethod">PaymentMethod</a>
   */
  private static JSONObject getBaseCardPaymentMethod() throws JSONException {
    JSONObject cardPaymentMethod = new JSONObject();
    cardPaymentMethod.put("type", "CARD");

    JSONObject parameters = new JSONObject();
    parameters.put("allowedAuthMethods", getAllowedCardAuthMethods());
    parameters.put("allowedCardNetworks", getAllowedCardNetworks());
    // Optionally, you can add billing address/phone number associated with a CARD payment method.
    parameters.put("billingAddressRequired", true);

    JSONObject billingAddressParameters = new JSONObject();
    billingAddressParameters.put("format", "FULL");

    parameters.put("billingAddressParameters", billingAddressParameters);

    cardPaymentMethod.put("parameters", parameters);

    return cardPaymentMethod;
  }

  /**
   * Describe the expected returned payment data for the CARD payment method
   *
   * @return A CARD PaymentMethod describing accepted cards and optional fields.
   * @throws JSONException
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#PaymentMethod">PaymentMethod</a>
   */
  private static JSONObject getCardPaymentMethod() throws JSONException {
    JSONObject cardPaymentMethod = getBaseCardPaymentMethod();
    cardPaymentMethod.put("tokenizationSpecification", getGatewayTokenizationSpecification());

    return cardPaymentMethod;
  }

  /**
   * An object describing accepted forms of payment by your app, used to determine a viewer's
   * readiness to pay.
   *
   * @return API version and payment methods supported by the app.
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#IsReadyToPayRequest">IsReadyToPayRequest</a>
   */
  public static Optional<JSONObject> getIsReadyToPayRequest() {
    try {
      JSONObject isReadyToPayRequest = getBaseRequest();
      isReadyToPayRequest.put(
          "allowedPaymentMethods", new JSONArray().put(getBaseCardPaymentMethod()));

      return Optional.of(isReadyToPayRequest);

    } catch (JSONException e) {
      return Optional.empty();
    }
  }

  /**
   * Provide Google Pay API with a payment amount, currency, and amount status.
   *
   * @return information about the requested payment.
   * @throws JSONException
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#TransactionInfo">TransactionInfo</a>
   */
  private static JSONObject getTransactionInfo(String price) throws JSONException {
    JSONObject transactionInfo = new JSONObject();
    transactionInfo.put("totalPrice", price);
    transactionInfo.put("totalPriceStatus", "FINAL");
    transactionInfo.put("countryCode", Constants.COUNTRY_CODE);
    transactionInfo.put("currencyCode", Constants.CURRENCY_CODE);
    transactionInfo.put("checkoutOption", "COMPLETE_IMMEDIATE_PURCHASE");

    return transactionInfo;
  }

  /**
   * Information about the merchant requesting payment information
   *
   * @return Information about the merchant.
   * @throws JSONException
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#MerchantInfo">MerchantInfo</a>
   */
  private static JSONObject getMerchantInfo() throws JSONException {
    return new JSONObject().put("merchantName", "Example Merchant");
  }

  /**
   * An object describing information requested in a Google Pay payment sheet
   *
   * @return Payment data expected by your app.
   * @see <a
   * href="https://developers.google.com/pay/api/android/reference/object#PaymentDataRequest">PaymentDataRequest</a>
   */
  public static Optional<JSONObject> getPaymentDataRequest(long priceCents) {

    final String price = PaymentsUtil.centsToString(priceCents);

    try {
      JSONObject paymentDataRequest = PaymentsUtil.getBaseRequest();
      paymentDataRequest.put(
          "allowedPaymentMethods", new JSONArray().put(PaymentsUtil.getCardPaymentMethod()));
      paymentDataRequest.put("transactionInfo", PaymentsUtil.getTransactionInfo(price));
      paymentDataRequest.put("merchantInfo", PaymentsUtil.getMerchantInfo());

      /* An optional shipping address requirement is a top-level property of the PaymentDataRequest
      JSON object. */
      paymentDataRequest.put("shippingAddressRequired", true);

      JSONObject shippingAddressParameters = new JSONObject();
      shippingAddressParameters.put("phoneNumberRequired", false);

      JSONArray allowedCountryCodes = new JSONArray(Constants.SHIPPING_SUPPORTED_COUNTRIES);

      shippingAddressParameters.put("allowedCountryCodes", allowedCountryCodes);
      paymentDataRequest.put("shippingAddressParameters", shippingAddressParameters);
      return Optional.of(paymentDataRequest);

    } catch (JSONException e) {
      return Optional.empty();
    }
  }

  /**
   * Converts cents to a string format accepted by {@link PaymentsUtil#getPaymentDataRequest}.
   *
   * @param cents value of the price in cents.
   */
  public static String centsToString(long cents) {
    return new BigDecimal(cents)
        .divide(CENTS_IN_A_UNIT, RoundingMode.HALF_EVEN)
        .setScale(2, RoundingMode.HALF_EVEN)
        .toString();
  }
}
PaymentsUtil.java