Google Pay API get the charged amount

Question

I am following the tutorial here to integrate google pay API to obtain funds for my app. So far I have successfully managed to make charging but I am finding it very hard to get the charged amount on successful transfer.

The google wallet dependency I am using is

implementation 'com.google.android.gms:play-services-wallet:15.0.1'

I want to get the charged amount in MainActivity'sonActivityResult as I make the request from another Fragment . But the Intent data has only the Email address and billing status. The only logical way I can think of is to somehow inject the charged amount manullay to Intent data but I can't seem to find a way around.

I tried to set a parameter here but It doesn't show up in the Intent I receive in the onActivityResult.

Can anyone give me a hand here?

public void requestPayment(BigDecimal amount) {
        // Disables the button to prevent multiple clicks.
        //mGooglePayButton.setClickable(false);

        // The price provided to the API should include taxes and shipping.
        // This price is not displayed to the user.

        String chargeAmount = amount.divide(MICROS).setScale(2, RoundingMode.HALF_EVEN).toString();

//        String price = PaymentsUtil.microsToString(chargeAmount);

        TransactionInfo transaction = PaymentsUtil.createTransaction(chargeAmount);

        Parcel parcel = Parcel.obtain();
        parcel.writeString(chargeAmount);
        parcel.recycle();
        transaction.writeToParcel(parcel, 0);

        PaymentDataRequest request = PaymentsUtil.createPaymentDataRequest(transaction);

        Task<PaymentData> futurePaymentData = mPaymentsClient.loadPaymentData(request);


        // 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.
        AutoResolveHelper.resolveTask(futurePaymentData, Objects.requireNonNull(getActivity()), LOAD_PAYMENT_DATA_REQUEST_CODE);


    }

Answer 1

Note that the retrieval of the payment token does not imply that a payment transaction happened successfully. This is something that only happens when you submit your order for processing through your payment processor or gateway. When that happens, this typically includes an order id and final charged amount.

I'd suggest this as a more specific way to account for successful transactions.