WebAPI/WebNFC: Difference between revisions

- Gaia Application developers can avail Nfc-Utility helper library (<$GAIA_HOME>/apps/system/js/nfc_util.js> to perform routine tasks  

  such as parse incoming  NDEF records or construct NDEF records.  

- NfcUtils in {{bug|963556}} will provide some basic constants and utility functions to create and parse NDEF records and  

  offers a set of utility functions to handle NDEF messages according to NFCForum-TS-NDEF_1.0.

It exposes the following functions public methods to Nfc Gaia applications.

- parseNDEF            : Parse a NDEF message

- parseHandoverNDEF    : Parse a NDEF message that represents a handover request

                          or a handover select message

- searchForBluetoothAC : Search for a Bluetooth Alternate Carrier in a

                          handover NDEF message

- parseBluetoothSSP    : Parses a Carrier Data Record that contains a

                          Bluetooth Secure Simple Pairing record

- encodeHandoverRequest: Returns a NDEF message that contains a handover

                          request message

- encodeHandoverSelect:  Returns a NDEF message that contains a handover

                          select message

''Sample example to demonstrate the construction of an url as an NDEF Message:''

  var tnf    = NDEF.TNF_WELL_KNOWN;

  var type    = NDEF.RTD_URI;

  var id      = new Uint8Array();

  // Short Record, 0x3 or "http://"

  var payload = new Uint8Array(NfcUtils.fromUTF8('\u0003mozilla.org'));

  var  urlNDEF = new MozNDEFRecord(tnf, type, id, payload);

  // Call writeNdef() API with urlNDEF