Represents a listener for card input events. Note that events are not one-time events. For instance, a user can "complete" the CVC many times by deleting and re-entering the value.
void onFocusChange(@NotNull com.stripe.android.view.CardInputListener.FocusField focusField)
Called whenever the field of focus within the widget changes.
enum CardInputListener.FocusFieldto which the focus has just changed.
Called when a potentially valid card number has been completed in the
class CardNumberEditText. May be called multiple times if the user edits
Called when a expiration date (one that has not yet passed) has been entered. May be called multiple times, if the user edits the date.
Called when a potentially valid CVC has been entered. The only verification performed on the number is that it is the correct length. May be called multiple times, if the user edits the CVC.