public void PayPalButtonClick(View arg0) {
dialog.hide();
// Create a basic PayPal payment
PayPalPayment payment = new PayPalPayment();
// Set the currency type
payment.setCurrencyType("USD");
// Set the recipient for the payment (can be a phone number)
payment.setRecipient("*****@*****.**");
// Set the payment amount, excluding tax and shipping costs
payment.setSubtotal(new BigDecimal(cost.getAmount()));
// Set the payment type--his can be PAYMENT_TYPE_GOODS,
// PAYMENT_TYPE_SERVICE, PAYMENT_TYPE_PERSONAL, or PAYMENT_TYPE_NONE
payment.setPaymentType(PayPal.PAYMENT_TYPE_GOODS);
// PayPalInvoiceData can contain tax and shipping amounts, and an
// ArrayList of PayPalInvoiceItem that you can fill out.
// These are not required for any transaction.
PayPalInvoiceData invoice = new PayPalInvoiceData();
// Set the tax amount
invoice.setTax(new BigDecimal(0));
PayPalInvoiceItem item = new PayPalInvoiceItem();
item.setID("1");
item.setName(cost.getCategory().getName());
item.setTotalPrice(new BigDecimal(cost.getAmount()));
item.setQuantity(1);
ArrayList<PayPalInvoiceItem> items = new ArrayList<>();
items.add(item);
invoice.setInvoiceItems(items);
payment.setMerchantName("House Share");
payment.setInvoiceData(invoice);
Intent checkoutIntent = PayPal.getInstance().checkout(payment, this.getContext());
startActivityForResult(checkoutIntent, REQUEST_PAYPAL_CHECKOUT);
}
