The document describes a PaymentService class that handles payment authorization for an Uber clone app. The class implements a Purchase callback to handle payment success, failure, and cancellation. Upon payment success, it makes a REST call to pass the payment nonce to the server and update the ride status. It also contains methods to start the payment process by ride ID and fetch a payment token from the server. The code sample at the end shows adding payment buttons to a ride request dialog that call the PaymentService on click to start the payment process.

1. Creating an Uber Clone - Part XXXII

2. Braintree cn1lib
© Codename One 2017 all rights reserved

3. public class PaymentService implements Purchase.Callback {
private String rideId;
private PaymentService(String rideId) {
this.rideId = rideId;
}
public static void sendPaymentAuthorization(String rideId) {
Purchase.startOrder(new PaymentService(rideId));
}
@Override
public void onPurchaseSuccess(String nonce) {
Log.p("Payment succeeded we got a nonce: " + nonce);
Rest.get(SERVER_URL + "pay/token").
acceptJson().
queryParam("ride", rideId).
queryParam("nonce", nonce).
getAsStringAsync(new Callback<Response<String>>() {
@Override
public void onSucess(Response<String> value) {
}
@Override
public void onError(Object sender, Throwable err, int errorCode, String
PaymentService

4. public class PaymentService implements Purchase.Callback {
private String rideId;
private PaymentService(String rideId) {
this.rideId = rideId;
}
public static void sendPaymentAuthorization(String rideId) {
Purchase.startOrder(new PaymentService(rideId));
}
@Override
public void onPurchaseSuccess(String nonce) {
Log.p("Payment succeeded we got a nonce: " + nonce);
Rest.get(SERVER_URL + "pay/token").
acceptJson().
queryParam("ride", rideId).
queryParam("nonce", nonce).
getAsStringAsync(new Callback<Response<String>>() {
@Override
public void onSucess(Response<String> value) {
}
@Override
public void onError(Object sender, Throwable err, int errorCode, String
PaymentService

5. public class PaymentService implements Purchase.Callback {
private String rideId;
private PaymentService(String rideId) {
this.rideId = rideId;
}
public static void sendPaymentAuthorization(String rideId) {
Purchase.startOrder(new PaymentService(rideId));
}
@Override
public void onPurchaseSuccess(String nonce) {
Log.p("Payment succeeded we got a nonce: " + nonce);
Rest.get(SERVER_URL + "pay/token").
acceptJson().
queryParam("ride", rideId).
queryParam("nonce", nonce).
getAsStringAsync(new Callback<Response<String>>() {
@Override
public void onSucess(Response<String> value) {
}
@Override
public void onError(Object sender, Throwable err, int errorCode, String
PaymentService

6. public void onSucess(Response<String> value) {
}
@Override
public void onError(Object sender, Throwable err, int errorCode, String errorMessage) {
Log.p("Payment server error!");
ToastBar.showErrorMessage("There was an error processing your payment: " + errorMessage);
}
});
}
@Override
public void onPurchaseFail(String a) {
Log.p("Payment failed!");
ToastBar.showErrorMessage("There was an error processing your payment: " + a);
}
@Override
public void onPurchaseCancel() {
Log.p("Purchase Canceled");
}
@Override
public String fetchToken() {
return Rest.get(SERVER_URL + "pay/token").
acceptJson().
getAsString().
getResponseData();
}
}
PaymentService

7. public void onSucess(Response<String> value) {
}
@Override
public void onError(Object sender, Throwable err, int errorCode, String errorMessage) {
Log.p("Payment server error!");
ToastBar.showErrorMessage("There was an error processing your payment: " + errorMessage);
}
});
}
@Override
public void onPurchaseFail(String a) {
Log.p("Payment failed!");
ToastBar.showErrorMessage("There was an error processing your payment: " + a);
}
@Override
public void onPurchaseCancel() {
Log.p("Purchase Canceled");
}
@Override
public String fetchToken() {
return Rest.get(SERVER_URL + "pay/token").
acceptJson().
getAsString().
getResponseData();
}
}
PaymentService

8. private void hailRideImpl(User car, final Container pinLayer) {
// snipped the top as the code is unchanged
Button ok = new Button("Pay With Cash", "BlackButton");
Button pay = new Button("Pay With Credit", "BlackButton");
Container dialog = BoxLayout.encloseY(driver, stars, ok, pay);
dialog.setUIID("SearchingDialog");
pinLayer.add(SOUTH, dialog);
revalidate();
ok.addActionListener(ee -> {
dialog.remove();
revalidate();
});
pay.addActionListener(ee -> {
dialog.remove();
revalidate();
PaymentService.sendPaymentAuthorization("" + car.currentRide.getLong());
});
}
hailRideImpl

9. private void hailRideImpl(User car, final Container pinLayer) {
// snipped the top as the code is unchanged
Button ok = new Button("Pay With Cash", "BlackButton");
Button pay = new Button("Pay With Credit", "BlackButton");
Container dialog = BoxLayout.encloseY(driver, stars, ok, pay);
dialog.setUIID("SearchingDialog");
pinLayer.add(SOUTH, dialog);
revalidate();
ok.addActionListener(ee -> {
dialog.remove();
revalidate();
});
pay.addActionListener(ee -> {
dialog.remove();
revalidate();
PaymentService.sendPaymentAuthorization("" + car.currentRide.getLong());
});
}
hailRideImpl