Android Studio: Transparent Checkout Paid Market

Question

I’m trying to integrate for the first time the transparent checkout for Android Mercadopago.

I already downloaded and put to work in Emulator the latest version of the application https://github.com/mercadopago/px-android.

On the Github page above, it is explained how to integrate the transparent checkout of Mercadopago with only one line of code.

new MercadoPagoCheckout.Builder("public_key", "checkout_preference_id")
    .build()
    .startPayment(activityOrContext, requestCode);

Where public_key we got on the Mercadopago credentials page. But the String checkout_preference_id I don’t know how to create, even though almost at the end of the Github page has a template for how to create it.

Create your preference id

curl -X POST \
     'https://api.mercadopago.com/checkout/preferences?access_token=ACCESS_TOKEN' \
     -H 'Content-Type: application/json' \
     -d '{
           "items": [
               {
               "title": "Dummy Item",
               "description": "Multicolor Item",
               "quantity": 1,
               "currency_id": "ARS",
               "unit_price": 10.0
               }
           ],
           "payer": {
               "email": "[email protected]"
           }
     }'

I tried to put a String any in checkout_preference_id, but it didn’t work. It just worked String provided in the Github application example itself:

private static final String DUMMY_PREFERENCE_ID = "243962506-0bb62e22-5c7b-425e-a0a6-c22d0f4758a9";

All other ways to implement presented in the example application require a fake payment confirmation reply.

Due to my little experience with application development, I have no idea how to create and pass this variable.

I appreciate if someone can help create and pass the variable checkout_preference_id.

EDITED

I would also be very grateful if someone could solve the problem of confirmation of fake payment, exemplifying with code.

I think checkout_preference_id can be accessed via Marketplace on a website or maybe when creating a curl using Android webservice. So this part is still a mystery to me.

Regarding the alternative way to create a payment with Mercadopago, we have other arguments to pass:

new MercadoPagoCheckout.Builder("public_key", checkoutPreference, paymentConfiguration)
                .build()
                .startPayment(activityOrContext, requestCode);

Where checkoutPreference allows us to create a custom item to sell.

final Item item = new Item.Builder("Product Title", 1, new BigDecimal(12.3)).setDescription("Product Description").build();
CheckoutPreference checkoutPreference = new CheckoutPreference.Builder(Sites.BRASIL, "[email protected]", Collections.singletonList(item)).setDefaultInstallments(1).build();

paymentConfiguration is where the confirmation of false payment is implemented.

PaymentConfiguration paymentConfiguration = new PaymentConfiguration.Builder(new MyPaymentProcessor()).build();

Where the class MyPaymentProcessor() and other classes on which it depends can be found in the Github example.