write NFC Tag - Android Network

Description

write NFC Tag
Demo Code


//package com.java2s;
import android.content.Context;
import android.nfc.FormatException;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.Tag;
import android.nfc.TagLostException;
import android.nfc.tech.Ndef;
import android.nfc.tech.NdefFormatable;
import java.io.IOException;
import java.nio.charset.Charset;

public class Main {
    public static boolean writeTag(Context context, Tag tag, String data) {
        // Record to launch Play Store if app is not installed
        NdefRecord appRecord = NdefRecord.createApplicationRecord(context
                .getPackageName());/*from w w  w . ja va  2 s.c om*/

        // Record with actual data we care about
        NdefRecord relayRecord = new NdefRecord(NdefRecord.TNF_MIME_MEDIA,
                new String("application/" + context.getPackageName())
                        .getBytes(Charset.forName("US-ASCII")), null,
                data.getBytes());

        // Complete NDEF message with both records
        NdefMessage message = new NdefMessage(new NdefRecord[] {
                relayRecord, appRecord });

        try {
            // If the tag is already formatted, just write the message to it
            Ndef ndef = Ndef.get(tag);
            if (ndef != null) {
                ndef.connect();

                // Make sure the tag is writable
                if (!ndef.isWritable()) {
                    // DialogUtils.displayErrorDialog(mainScriptContext,
                    // R.string.nfcReadOnlyErrorTitle,
                    // R.string.nfcReadOnlyError);
                    return false;
                }

                // Check if there's enough space on the tag for the message
                int size = message.toByteArray().length;
                if (ndef.getMaxSize() < size) {
                    // DialogUtils.displayErrorDialog(mainScriptContext,
                    // R.string.nfcBadSpaceErrorTitle,
                    // R.string.nfcBadSpaceError);
                    return false;
                }

                try {
                    // Write the data to the tag
                    ndef.writeNdefMessage(message);

                    // DialogUtils.displayInfoDialog(mainScriptContext,
                    // R.string.nfcWrittenTitle, R.string.nfcWritten);
                    return true;
                } catch (TagLostException tle) {
                    // DialogUtils.displayErrorDialog(mainScriptContext,
                    // R.string.nfcTagLostErrorTitle, R.string.nfcTagLostError);
                    return false;
                } catch (IOException ioe) {
                    // DialogUtils.displayErrorDialog(mainScriptContext,
                    // R.string.nfcFormattingErrorTitle,
                    // R.string.nfcFormattingError);
                    return false;
                } catch (FormatException fe) {
                    // DialogUtils.displayErrorDialog(mainScriptContext,
                    // R.string.nfcFormattingErrorTitle,
                    // R.string.nfcFormattingError);
                    return false;
                }
                // If the tag is not formatted, format it with the message
            } else {
                NdefFormatable format = NdefFormatable.get(tag);
                if (format != null) {
                    try {
                        format.connect();
                        format.format(message);

                        // DialogUtils.displayInfoDialog(mainScriptContext,
                        // R.string.nfcWrittenTitle, R.string.nfcWritten);
                        return true;
                    } catch (TagLostException tle) {
                        // DialogUtils
                        // .displayErrorDialog(mainScriptContext,
                        // R.string.nfcTagLostErrorTitle,
                        // R.string.nfcTagLostError);
                        return false;
                    } catch (IOException ioe) {
                        // DialogUtils.displayErrorDialog(mainScriptContext,
                        // R.string.nfcFormattingErrorTitle,
                        // R.string.nfcFormattingError);
                        return false;
                    } catch (FormatException fe) {
                        // DialogUtils.displayErrorDialog(mainScriptContext,
                        // R.string.nfcFormattingErrorTitle,
                        // R.string.nfcFormattingError);
                        return false;
                    }
                } else {
                    // DialogUtils.displayErrorDialog(mainScriptContext,
                    // R.string.nfcNoNdefErrorTitle, R.string.nfcNoNdefError);
                    return false;
                }
            }
        } catch (Exception e) {
            // DialogUtils.displayErrorDialog(mainScriptContext,
            // R.string.nfcUnknownErrorTitle, R.string.nfcUnknownError);
        }

        return false;
    }
}
write NFC Tag - Android Network

Description

Demo Code

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