外部付款系統的應用程式內整合指南

val purchasesUpdatedListener =
    PurchasesUpdatedListener { billingResult, purchases ->
        // Handle new Google Play purchase.
    }

val developerProvidedBillingListener =
    DeveloperProvidedBillingListener { details ->
        // Handle user selection for developer provided billing option.
    }

val billingClient = BillingClient.newBuilder(context)
    .setListener(purchasesUpdatedListener)
    .enablePendingPurchases()
    .enableBillingProgram(
        EnableBillingProgramParams.newBuilder()
            .setBillingProgram(BillingProgram.EXTERNAL_PAYMENTS)
            .setDeveloperProvidedBillingListener(developerProvidedBillingListener)
            .build())
    .build()

private PurchasesUpdatedListener purchasesUpdatedListener = new PurchasesUpdatedListener() {
    @Override
    public void onPurchasesUpdated(BillingResult billingResult, List<Purchase> purchases) {
        // Handle new Google Play purchase.
    }
};

private DeveloperProvidedBillingListener developerProvidedBillingListener =
    new DeveloperProvidedBillingListener() {
        @Override
        public void onUserSelectedDeveloperBilling(
            DeveloperProvidedBillingDetails details) {
            // Handle user selection for developer provided billing option.
        }
    };

private BillingClient billingClient = BillingClient.newBuilder(context)
    .setListener(purchasesUpdatedListener)
    .enablePendingPurchases()
    .enableBillingProgram(
        EnableBillingProgramParams.newBuilder()
            .setBillingProgram(BillingProgram.EXTERNAL_PAYMENTS)
            .setDeveloperProvidedBillingListener(developerProvidedBillingListener)
            .build())
    .build();

billingClient.isBillingProgramAvailableAsync(
  BillingProgram.EXTERNAL_PAYMENTS,
  object : BillingProgramAvailabilityListener {
    override fun onBillingProgramAvailabilityResponse(
      billingProgram: Int, billingResult: BillingResult) {
        if (billingResult.responseCode != BillingResponseCode.OK) {
            // Handle failures such as retrying due to network errors,
            // handling external payments unavailable, etc.
            return
        }

        // External payments are available. Can proceed with generating an
        // external transaction token.
})

billingClient.isBillingProgramAvailableAsync(
  BillingProgram.EXTERNAL_PAYMENTS,
  new BillingProgramAvailabilityListener() {
    @Override
    public void onBillingProgramAvailabilityResponse(
      int billingProgram, BillingResult billingResult) {
        if (billingResult.getResponseCode() != BillingResponseCode.OK) {
            // Handle failures such as retrying due to network errors,
            // handling external payments unavailable, etc.
            return;
        }

        // External payments are available. Can proceed with generating an external transaction token.
      }

    });

val params =
    BillingProgramReportingDetailsParams.newBuilder()
        .setBillingProgram(BillingProgram.EXTERNAL_PAYMENTS)
        .build()

billingClient.createBillingProgramReportingDetailsAsync(
  params,
  object : BillingProgramReportingDetailsListener {
    override fun onCreateBillingProgramReportingDetailsResponse(
      billingResult: BillingResult,
      billingProgramReportingDetails: BillingProgramReportingDetails?) {
        if (billingResult.responseCode != BillingResponseCode.OK) {
            // Handle failures such as retrying due to network errors.
            return
        }
        val externalTransactionToken =
            billingProgramReportingDetails?.externalTransactionToken
        // Persist the external transaction token locally. Pass it to
        // the external website using DeveloperBillingOptionParams when
        // launchBillingFlow is called.
    }
})

BillingProgramReportingDetailsParams params =
    BillingProgramReportingDetailsParams.newBuilder()
        .setBillingProgram(BillingProgram.EXTERNAL_PAYMENTS)
        .build();

billingClient.createBillingProgramReportingDetailsAsync(
  params,
  new BillingProgramReportingDetailsListener() {
    @Override
    public void onCreateBillingProgramReportingDetailsResponse(
      BillingResult billingResult,
      @Nullable BillingProgramReportingDetails
        billingProgramReportingDetails) {
        if (billingResult.getResponseCode() != BillingResponseCode.OK) {
            // Handle failures such as retrying due to network errors.
            return;
        }

        String transactionToken =
          billingProgramReportingDetails.getExternalTransactionToken();

        // Persist the external transaction token locally. Pass it to
        // the external website using DeveloperBillingOptionParams when
        // launchBillingFlow is called.
      }
});

val developerBillingOptionParams =
    DeveloperBillingOptionParams.newBuilder()
        .setBillingProgram(BillingProgram.EXTERNAL_PAYMENTS)
        .setLinkUri("https://www.example.com/external/purchase")
        .setLaunchMode(
            DeveloperBillingOptionParams.LaunchMode.LAUNCH_IN_EXTERNAL_BROWSER_OR_APP)
        .build()

DeveloperBillingOptionParams developerBillingOptionParams =
    DeveloperBillingOptionParams.newBuilder()
        .setBillingProgram(BillingProgram.EXTERNAL_PAYMENTS)
        .setLinkUri("https://www.example.com/external/purchase")
        .setLaunchMode(
            DeveloperBillingOptionParams.LaunchMode.LAUNCH_IN_EXTERNAL_BROWSER_OR_APP)
        .build();