create NFC Ndef Text App Message - Android Network

Android examples for Network:NFC Message

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Description

create NFC Ndef Text App Message

Demo Code

/*//w  w w.j a v  a 2  s.  co m
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
import android.content.Context;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.nfc.Tag;
import android.nfc.tech.Ndef;
import java.nio.charset.Charset;
import java.util.Locale;

public class Main{
    public static NdefMessage createNdefTextAppMessage(Context context,
            String content) {
        if (content.length() == 0)
            return null;
        NdefRecord textRecord = NFCHelper.createTextRecord(content,
                Locale.getDefault(), true);
        NdefRecord aar = NdefRecord.createApplicationRecord(context
                .getPackageName());
        return new NdefMessage(new NdefRecord[] { textRecord, aar });
    }
    public static NdefRecord createTextRecord(String payload,
            Locale locale, boolean encodeInUtf8) {
        byte[] langBytes = locale.getLanguage().getBytes(
                Charset.forName("US-ASCII"));
        Charset utfEncoding = encodeInUtf8 ? Charset.forName("UTF-8")
                : Charset.forName("UTF-16");
        byte[] textBytes = payload.getBytes(utfEncoding);
        int utfBit = encodeInUtf8 ? 0 : (1 << 7);
        char status = (char) (utfBit + langBytes.length);
        byte[] data = new byte[1 + langBytes.length + textBytes.length];
        data[0] = (byte) status;
        System.arraycopy(langBytes, 0, data, 1, langBytes.length);
        System.arraycopy(textBytes, 0, data, 1 + langBytes.length,
                textBytes.length);
        NdefRecord record = new NdefRecord(NdefRecord.TNF_WELL_KNOWN,
                NdefRecord.RTD_TEXT, new byte[0], data);
        return record;
    }
}

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