> For the complete documentation index, see [llms.txt](https://docs.payments.thalescloud.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.payments.thalescloud.io/nfc-wallet-sdk-android/es/implement-nfc-wallet/manage-digital-cards/set-the-default-payment-card.md).

# Establecer la tarjeta de pago predeterminada

## Resumen

La tarjeta digital predeterminada es la tarjeta que su **aplicación de billetera digital** selecciona automáticamente para pagos sin contacto.

El **usuario final** puede mantener la tarjeta digital predeterminada o cambiar de tarjeta en su interfaz antes de confirmar el pago.

Ver [Implementar pagos sin contacto](/nfc-wallet-sdk-android/es/implement-nfc-wallet/make-payment/implement-contactless-payments.md).

## Integración del SDK

### Establecer la tarjeta de pago predeterminada

Llame a `DigitalizedCard.setDefault()` en la `DigitalizedCard` que desea establecer como predeterminada.

{% hint style="warning" %}
Antes de establecer una tarjeta digital como predeterminada, confirme que esté activa y tenga al menos un pago restante (clave de pago). Use los campos de estado de la tarjeta y estado de la clave de pago en [Mostrar tarjetas digitales](/nfc-wallet-sdk-android/es/implement-nfc-wallet/manage-digital-cards/display-digital-cards.md#retrieve-digital-card-information) para validar ambos.

* Llame a `DigitalizedCardStatus.getState()` para verificar el estado de la tarjeta.
* Llame a `DigitalizedCardStatus.getNumberOfPaymentsLeft()` para comprobar los pagos restantes.
  {% endhint %}

El ejemplo a continuación establece la tarjeta digital predeterminada para pagos sin contacto.

{% code title="SetDefaultCard.java" %}

```java
public void setDefault(final DigitalizedCard digitalizedCard) {
    digitalizedCard.setDefault(
        PaymentType.CONTACTLESS,
        new AsyncHandlerVoid(new AsyncHandlerVoid.Delegate() {
            @Override
            public void onSuccess() {
                // Tarjeta predeterminada establecida con éxito.
            }

            @Override
            public void onError(final String error) {
                // TODO: manejar el error
            }
        })
    );
}
```

{% endcode %}

### `DigitalizedCardManager` para la gestión de la tarjeta predeterminada

`DigitalizedCardManager` proporciona APIs adicionales para la gestión de la tarjeta predeterminada:

* `DigitalizedCardManager.getDefault()`: Recuperar el **ID de la tarjeta tokenizada** de la tarjeta predeterminada.
* `DigitalizedCardManager.unsetDefaultCard()`: Anular la tarjeta predeterminada actual. Después de eso, no hay ninguna tarjeta seleccionada por defecto.


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