write NFC Message To Tag - Android Network

Android examples for Network:NFC Message

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Description

write NFC Message To Tag

Demo Code


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

import android.nfc.NdefMessage;

import android.nfc.Tag;

import android.nfc.tech.Ndef;
import android.nfc.tech.NdefFormatable;

public class Main {
    private static boolean writeMsgToTag(NdefMessage message,
            Tag detectedTag) {/*ww w .j  av  a2  s.c o m*/
        System.out.println("writing msg to tag");
        int size = message.toByteArray().length;
        try {
            Ndef ndef = Ndef.get(detectedTag);
            if (ndef != null) {
                ndef.connect();

                if (!ndef.isWritable()) {
                    //Toast.makeText(context, "Tag is read-only.", Toast.LENGTH_LONG).show();
                    return false;
                }
                if (ndef.getMaxSize() < size) {
                    //Toast.makeText(context, "The data cannot written to tag, Tag capacity is " + ndef.getMaxSize() + " bytes, message is " + size + " bytes.", Toast.LENGTH_LONG).show();
                    return false;
                }

                ndef.writeNdefMessage(message);
                ndef.close();
                //Toast.makeText(context, "Message is written over to tag, message=" + message, Toast.LENGTH_LONG).show();
                return true;
            } else {
                NdefFormatable ndefFormat = NdefFormatable.get(detectedTag);
                if (ndefFormat != null) {
                    try {
                        ndefFormat.connect();
                        ndefFormat.format(message);
                        ndefFormat.close();
                        //Toast.makeText(context, "The data is written to the tag ", Toast.LENGTH_SHORT).show();
                        return true;
                    } catch (IOException e) {
                        //Toast.makeText(context, "Failed to format tag", Toast.LENGTH_SHORT).show();
                        return false;
                    }
                } else {
                    //Toast.makeText(context, "NDEF is not supported", Toast.LENGTH_SHORT).show();
                    return false;
                }
            }
        } catch (Exception e) {
            //Toast.makeText(context, "Write opreation is failed", Toast.LENGTH_SHORT).show();
            return false;
        }

    }
}

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