get Received Beam String via NFC - Android Network

Android examples for Network:NFC

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  2. Android
  3. Network
  4. NFC

Description

get Received Beam String via NFC

Demo Code


//package com.java2s;

import android.content.Intent;
import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;
import android.os.Build;
import android.os.Parcelable;
import android.util.Log;

public class Main {
    private static final String TAG = "BeamReceiveHelper";

    public static String getReceivedBeamString(Intent intent) {
        byte[] beam = getReceivedBeam(intent);
        if (beam == null) {
            return null;
        }/*from   w w w .j av a2  s.c  om*/
        return new String(beam);
    }

    public static byte[] getReceivedBeam(Intent intent) {
        if (intent == null) {
            Log.d(TAG, "intest is null");
            return null;
        }
        if (Build.VERSION.SDK_INT < Build.VERSION_CODES.GINGERBREAD_MR1) {
            Log.d(TAG, "non support version");
            return null;
        }
        if (!NfcAdapter.ACTION_NDEF_DISCOVERED.equals(intent.getAction())) {
            Log.d(TAG, "Intent Action is differnt");
            return null;
        }
        Parcelable[] rawMsgs = intent
                .getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
        if (rawMsgs == null) {
            Log.d(TAG, "raw message is null");
            return null;
        }
        NdefMessage msg = (NdefMessage) rawMsgs[0];
        if (msg == null) {
            Log.d(TAG, "ndef message is null");
            return null;
        }
        NdefRecord[] ndefRecords = msg.getRecords();
        if (ndefRecords == null) {
            Log.d(TAG, "ndefRecords is null");
            return null;
        } else if (ndefRecords.length < 1) {
            Log.d(TAG, "ndefRecords length is 0");
            return null;
        }
        NdefRecord firstNdefRecord = ndefRecords[0];
        if (firstNdefRecord == null) {
            Log.d(TAG, "firstNdefRecord is null");
            return null;
        }
        return firstNdefRecord.getPayload();
    }
}

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