write NFC String to record - Android Network

Android examples for Network:NFC Record

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Description

write NFC String to record

Demo Code


//package com.java2s;
import java.io.IOException;
import java.io.UnsupportedEncodingException;

import android.nfc.FormatException;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;

import android.nfc.Tag;

import android.nfc.tech.Ndef;

public class Main {
    static void writeString(String text, Tag tag) throws IOException,
            FormatException {//from   w  ww . j  ava  2 s . c  o  m

        NdefRecord[] records = { createStringRecord(text) };
        NdefMessage message = new NdefMessage(records);
        Ndef ndef = Ndef.get(tag);
        ndef.connect();
        ndef.writeNdefMessage(message);
        ndef.close();
    }

    private static NdefRecord createStringRecord(String text)
            throws UnsupportedEncodingException {

        //create the message in according with the standard
        String lang = "en";
        byte[] textBytes = text.getBytes();
        byte[] langBytes = lang.getBytes("US-ASCII");
        int langLength = langBytes.length;
        int textLength = textBytes.length;

        byte[] payload = new byte[1 + langLength + textLength];
        payload[0] = (byte) langLength;

        // copy langbytes and textbytes into payload
        System.arraycopy(langBytes, 0, payload, 1, langLength);
        System.arraycopy(textBytes, 0, payload, 1 + langLength, textLength);

        NdefRecord recordNFC = new NdefRecord(NdefRecord.TNF_WELL_KNOWN,
                NdefRecord.RTD_TEXT, new byte[0], payload);
        return recordNFC;
    }
}

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