This is a part of an online Codename One course published around 2017 see it all for free at https://debugagent.com/series/cn1

1. Native Payment - Part I

2. Braintree
© Codename One 2017 all rights reserved

3. What do we Need to Do?
✦Get a nonce using a token, heres the API snippet for
Android:
© Codename One 2017 all rights reserved
public void onBraintreeSubmit(View v) {
DropInRequest dropInRequest = new DropInRequest()
.clientToken(token);
startActivityForResult(dropInRequest.getIntent(this), REQUEST_CODE);
}

4. And iOS
✦This is what we need to do in iOS:
© Codename One 2017 all rights reserved
- (void)showDropIn:(NSString *)clientTokenOrTokenizationKey {
BTDropInRequest *request = [[BTDropInRequest alloc] init];
BTDropInController *dropIn = [[BTDropInController alloc]
initWithAuthorization:clientTokenOrTokenizationKey request:request handler:^(BTDropInController *
_Nonnull controller, BTDropInResult * _Nullable result, NSError * _Nullable error) {
if (error != nil) {
NSLog(@"ERROR");
} else if (result.cancelled) {
NSLog(@"CANCELLED");
} else {
// Use the BTDropInResult properties to update your UI
}
}];
[self presentViewController:dropIn animated:YES completion:nil];
}

5. And iOS
✦This is what we need to do in iOS:
© Codename One 2017 all rights reserved
- (void)showDropIn:(NSString *)clientTokenOrTokenizationKey {
BTDropInRequest *request = [[BTDropInRequest alloc] init];
BTDropInController *dropIn = [[BTDropInController alloc]
initWithAuthorization:clientTokenOrTokenizationKey request:request handler:^(BTDropInController *
_Nonnull controller, BTDropInResult * _Nullable result, NSError * _Nullable error) {
if (error != nil) {
NSLog(@"ERROR");
} else if (result.cancelled) {
NSLog(@"CANCELLED");
} else {
// Use the BTDropInResult properties to update your UI
}
}];
[self presentViewController:dropIn animated:YES completion:nil];
}

6. And iOS
✦This is what we need to do in iOS:
© Codename One 2017 all rights reserved
- (void)showDropIn:(NSString *)clientTokenOrTokenizationKey {
BTDropInRequest *request = [[BTDropInRequest alloc] init];
BTDropInController *dropIn = [[BTDropInController alloc]
initWithAuthorization:clientTokenOrTokenizationKey request:request handler:^(BTDropInController *
_Nonnull controller, BTDropInResult * _Nullable result, NSError * _Nullable error) {
if (error != nil) {
NSLog(@"ERROR");
} else if (result.cancelled) {
NSLog(@"CANCELLED");
} else {
// Use the BTDropInResult properties to update your UI
}
}];
[self presentViewController:dropIn animated:YES completion:nil];
}

7. And iOS
✦This is what we need to do in iOS:
© Codename One 2017 all rights reserved
- (void)showDropIn:(NSString *)clientTokenOrTokenizationKey {
BTDropInRequest *request = [[BTDropInRequest alloc] init];
BTDropInController *dropIn = [[BTDropInController alloc]
initWithAuthorization:clientTokenOrTokenizationKey request:request handler:^(BTDropInController *
_Nonnull controller, BTDropInResult * _Nullable result, NSError * _Nullable error) {
if (error != nil) {
NSLog(@"ERROR");
} else if (result.cancelled) {
NSLog(@"CANCELLED");
} else {
// Use the BTDropInResult properties to update your UI
}
}];
[self presentViewController:dropIn animated:YES completion:nil];
}

8. And iOS
✦This is what we need to do in iOS:
© Codename One 2017 all rights reserved
- (void)showDropIn:(NSString *)clientTokenOrTokenizationKey {
BTDropInRequest *request = [[BTDropInRequest alloc] init];
BTDropInController *dropIn = [[BTDropInController alloc]
initWithAuthorization:clientTokenOrTokenizationKey request:request handler:^(BTDropInController *
_Nonnull controller, BTDropInResult * _Nullable result, NSError * _Nullable error) {
if (error != nil) {
NSLog(@"ERROR");
} else if (result.cancelled) {
NSLog(@"CANCELLED");
} else {
// Use the BTDropInResult properties to update your UI
}
}];
[self presentViewController:dropIn animated:YES completion:nil];
}

9. And iOS
✦This is what we need to do in iOS:
© Codename One 2017 all rights reserved
- (void)showDropIn:(NSString *)clientTokenOrTokenizationKey {
BTDropInRequest *request = [[BTDropInRequest alloc] init];
BTDropInController *dropIn = [[BTDropInController alloc]
initWithAuthorization:clientTokenOrTokenizationKey request:request handler:^(BTDropInController *
_Nonnull controller, BTDropInResult * _Nullable result, NSError * _Nullable error) {
if (error != nil) {
NSLog(@"ERROR");
} else if (result.cancelled) {
NSLog(@"CANCELLED");
} else {
// Use the BTDropInResult properties to update your UI
}
}];
[self presentViewController:dropIn animated:YES completion:nil];
}

10. And iOS
✦This is what we need to do in iOS:
© Codename One 2017 all rights reserved
- (void)showDropIn:(NSString *)clientTokenOrTokenizationKey {
BTDropInRequest *request = [[BTDropInRequest alloc] init];
BTDropInController *dropIn = [[BTDropInController alloc]
initWithAuthorization:clientTokenOrTokenizationKey request:request handler:^(BTDropInController *
_Nonnull controller, BTDropInResult * _Nullable result, NSError * _Nullable error) {
if (error != nil) {
NSLog(@"ERROR");
} else if (result.cancelled) {
NSLog(@"CANCELLED");
} else {
// Use the BTDropInResult properties to update your UI
}
}];
[self presentViewController:dropIn animated:YES completion:nil];
}

11. And iOS
✦This is what we need to do in iOS:
© Codename One 2017 all rights reserved
- (void)showDropIn:(NSString *)clientTokenOrTokenizationKey {
BTDropInRequest *request = [[BTDropInRequest alloc] init];
BTDropInController *dropIn = [[BTDropInController alloc]
initWithAuthorization:clientTokenOrTokenizationKey request:request handler:^(BTDropInController *
_Nonnull controller, BTDropInResult * _Nullable result, NSError * _Nullable error) {
if (error != nil) {
NSLog(@"ERROR");
} else if (result.cancelled) {
NSLog(@"CANCELLED");
} else {
// Use the BTDropInResult properties to update your UI
}
}];
[self presentViewController:dropIn animated:YES completion:nil];
}

12. So all we need…
✦Is one method:
© Codename One 2017 all rights reserved
import com.codename1.system.NativeInterface;
public interface BraintreeNative extends NativeInterface {
public void showChargeUI(String clientToken);
}
Tip
We generate stubs by right
clicking the native interface
and selecting Generate
Native Stubs

13. But we also need…
✦Callbacks for results… Left them as stubs for now
© Codename One 2017 all rights reserved
public class BraintreePaymentCallback {
public static void onPurchaseSuccess(String nonce) {
}
public static void onPurchaseFail(String errorMessage) {
}
public static void onPurchaseCancel() {
}
}

14. Purchase Class
✦ Invoking native interfaces directly is bad practice
✦ They are an implementation detail and should be
abstracted
✦ Enter the Purchase class which hides the
implementation and also provides a generic
implementation based on the JavaScript port of
Braintree
© Codename One 2017 all rights reserved

15. public class Purchase {
boolean flag;
public void startOrder() {
BraintreeNative bn = NativeLookup.create(BraintreeNative.class);
String token = "token-snipped";
if(bn != null && bn.isSupported()) {
bn.showChargeUI(token);
} else {
Form buy = new Form(new BorderLayout());
buy.getToolbar().setUIID("DarkToolbar");
Form previous = Display.getInstance().getCurrent();
buy.getToolbar().addMaterialCommandToLeftBar("", FontImage.MATERIAL_CANCEL, e ->
previous.showBack());
BrowserComponent cmp = new BrowserComponent();
buy.add(BorderLayout.CENTER, cmp);
cmp.setPage("html-snipped", null);
buy.show();
}
if(flag) {
BraintreePaymentCallback.onPurchaseCancel();
BraintreePaymentCallback.onPurchaseFail(null);
BraintreePaymentCallback.onPurchaseSuccess(null);
}
}
}
Purchase
Compiler Issue
iOS VM strips unused code and could
remove these without that flag…