While other classes handle de?¬?nition and storage of
NDEF messages the NDEFTagConnection interface provides the basic connection for
exchanging this NDEF data between NFC devices or NFC tag. This interface does not
concern itself with physical type of the contactless target; it simply reads and writes the
data. The protocol to do achieve this read and write process is extended from GCF.
Javax.microedition.contactless.rf: Although this API implementation
aims to use NDEF records as standard, it also provides access to physical RF targets that
do not support NDEF. This package contains one interface, PlainTagConnection,
which encloses functionality to detect RFID tags. This is done to enable comprehensive
support for various types of RFID tags since it would be undesirable to have an API
to support all different types of tags.
Javax.microedition.contactless.sc: This package is responsible for communication
with external smart cards. Although JSR-177 covers communication with smart
cards, through an APDU connection, JSR-257 de?¬?nes an ISO14443 connection interface to
access smart cards. Unlike an APDU connection, an ISO4443 connection can read both
resident and external smart cards and provide access at a much lower level.
Javax.microedition.contactless.visual: This package provides support for
visual tag targets which are detected as contactless targets.
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