Transaction

To get available currencies you have to use this method

private void getCurrencies() {
        try {
            // get list of available currencies from tetra
            transactionCurrencyValues = getTransaction().getAvailableCurrencies();
            // check transactionCurrencyValues contains values
            if (!transactionCurrencyValues.isEmpty()) {
                // init list of currencies code to display
                List transactionCurrencyCode = new ArrayList();
                // create a list of currencies code to display
                transactionCurrencyValues.forEach(currency -> {
                    transactionCurrencyCode.add(currency.getCode());
                });
            } else {

            }
        } catch (IngenicoException e) {
            e.printStackTrace();
        }
    }

Register the listener for transaction Done

 getTransaction().registerTransactionDoneListener(this);

Start transaction

private void startTransaction() {
    // Initialize numeric code value
    Long currencyNumericCode = -1L;
    // Check availability of items in spinner
    if (transactionCurrencyValues.size() > 0 ) {
        // Get selected numeric code value
        currencyNumericCode = (long) (transactionCurrencyValues.get(0)).getNumericCode();
    }
    // Cast to final numeric code value
    Long finalCurrencyNumericCode = currencyNumericCode;
    new Thread(() -> {
        try {
            // Fill transaction parameters
            TransactionInputData inputData = TransactionInputData.builder()
                    .setAmount(new BigDecimal(5.20))
                    .setCurrency(finalCurrencyNumericCode)
                    .setTransactionType(TransactionTypes.SALE)
                    .build();

            // Start the transaction
            TransactionRequest request = getTransaction().start(inputData);

            // Request accepted?
            if (!request.isRequestAccepted())
                throw new Exception("Could not start transaction: " + request.getTransactionStatus());

            // Fine, ongoing payment
            changeState(PaymentState.InProgress);
        } catch (Exception e) {
            Log.e(TAG, "Start transaction failed", e);
        }
    }).start();
}

To abort transaction you have to use this source code

private void abortOngoingTransaction() {
    new Thread(() -> {
        try {
            getTransaction().abortOngoingTransaction();
        } catch (Exception e) {

            Log.e(TAG, "Abort transaction failed", e);

            isProcesscing = false;
        }
    }).start();
}

When the transaction is done you have to check the result

@Override
public void onTransactionDone(TransactionResult transactionResult) {
    boolean success = transactionResult.getStatus() == TransactionStatus.TXN_STATUS_TXN_APPROVED;


    mContext.runOnUiThread(() -> {
        // Show OK or KO according to the transaction success
        if(success){
            mPaymenetListener.paymentDoneListener(transactionResult);
        }else{
            mPaymenetListener.paymentErrorListener(transactionResult.getStatus().name());
        }
        isProcesscing = false;

    });
    changeState(PaymentState.Done);
}