NFC tags are based on a number of independently developed technologies and offer a wide range of capabilities. The TagTechnology implementations provide access to these different technologies and capabilities. Some sub-classes map to technology specification (for example NfcA, IsoDep, others map to pseudo-technologies or capabilities (for example Ndef, NdefFormatable).
It is mandatory for all Android NFC devices to provide the following TagTechnology implementations.
NfcA (also known as ISO 14443-3A)
NfcB (also known as ISO 14443-3B)
NfcF (also known as JIS 6319-4)
NfcV (also known as ISO 15693)
Ndef on NFC Forum Type 1, Type 2, Type 3 or Type 4 compliant tags
It is optional for Android NFC devices to provide the following TagTechnology implementations. If it is not provided, the Android device will never enumerate that class via getTechList().
NdefFormatable must only be enumerated on tags for which this Android device is capable of formatting. Proprietary knowledge is often required to format a tag to make it NDEF compatible.
TagTechnology implementations provide methods that fall into two classes: cached getters and I/O operations.
IsoDep Provides access to ISO-DEP (ISO 14443-4) properties and I/O operations on a Tag.
MifareClassic Provides access to MIFARE Classic properties and I/O operations on a Tag.
MifareUltralight Provides access to MIFARE Ultralight properties and I/O operations on a Tag.
Ndef Provides access to NDEF content and operations on a Tag.
NdefFormatable Provide access to NDEF format operations on a Tag.
NfcA Provides access to NFC-A (ISO 14443-3A) properties and I/O operations on a Tag.
NfcB Provides access to NFC-B (ISO 14443-3B) properties and I/O operations on a Tag.
NfcBarcode Provides access to tags containing just a barcode.
NfcF Provides access to NFC-F (JIS 6319-4) properties and I/O operations on a Tag.
NfcV Provides access to NFC-V (ISO 15693) properties and I/O operations on a Tag.
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