当我将现有的PaymentMethodRequired 设置为 true 时，IsReadyToPayRequest 返回 false

Question

我按照Google Pay for Payments > Android教程中的确定使用 Google Pay API 付款的准备情况步骤来确定 Google Pay 钱包的准备情况。

在我将IsReadyToPayRequest对象existingPaymentMethodRequired中的属性设置为 之前，此方法工作正常。我的目的是确定钱包是否至少有一张卡，但我总是从请求中得到。我的环境是测试环境，Android手机注册了信用卡。有谁知道为什么？truefalse

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

    return Optional.of(isReadyToPayRequest);

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

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

  return cardPaymentMethod;
}

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;
}

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

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

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

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());
        }
      }
    }
  );
}

Answer 1

根据IsReadyToPayRequestexistingPaymentMethodRequired对象文档中属性的描述，在TEST 环境中它应该始终返回：true

注意：在TEST 环境中，如果您在IsReadyToPay() 请求中将existingPaymentMethodRequired 设置为true，则响应始终返回true。

你能确认它总是会false为你返回吗？即：文档是否不正确？