NFC call On Resume - Android Network

Android examples for Network:NFC

  1. HOME
  2. Android
  3. Network
  4. NFC

Description

NFC call On Resume

Demo Code


//package com.java2s;

import android.app.Activity;
import android.app.PendingIntent;

import android.content.Intent;
import android.content.IntentFilter;

import android.nfc.NdefMessage;
import android.nfc.NdefRecord;
import android.nfc.NfcAdapter;

import android.os.Parcelable;

import android.util.Log;

public class Main {
    public static final String TAG = "NFC";
    private static boolean mResumed = false;
    private static NfcAdapter mNfcAdapter;
    private static PendingIntent mNfcPendingIntent;
    private static IntentFilter[] mNdefExchangeFilters;

    public static void callOnResume(Activity activity) {
        mResumed = true;/*from   w  w w  . j  a  v  a 2 s  . c om*/
        // Sticky notes received from Android
        if (NfcAdapter.ACTION_NDEF_DISCOVERED.equals(activity.getIntent()
                .getAction())) {
            NdefMessage[] messages = getNdefMessages(activity.getIntent());
            byte[] payload = messages[0].getRecords()[0].getPayload();
            activity.setIntent(new Intent()); // Consume this intent.
        }
        enableNdefExchangeMode(activity);
    }

    public static NdefMessage[] getNdefMessages(Intent intent) {
        // Parse the intent
        NdefMessage[] msgs = null;
        String action = intent.getAction();
        if (NfcAdapter.ACTION_TAG_DISCOVERED.equals(action)
                || NfcAdapter.ACTION_NDEF_DISCOVERED.equals(action)) {
            Parcelable[] rawMsgs = intent
                    .getParcelableArrayExtra(NfcAdapter.EXTRA_NDEF_MESSAGES);
            if (rawMsgs != null) {
                msgs = new NdefMessage[rawMsgs.length];
                for (int i = 0; i < rawMsgs.length; i++) {
                    msgs[i] = (NdefMessage) rawMsgs[i];
                }
            } else {
                // Unknown tag type
                byte[] empty = new byte[] {};
                NdefRecord record = new NdefRecord(NdefRecord.TNF_UNKNOWN,
                        empty, empty, empty);
                NdefMessage msg = new NdefMessage(
                        new NdefRecord[] { record });
                msgs = new NdefMessage[] { msg };
            }
        } else {
            Log.d(TAG, "Unknown intent.");
        }
        return msgs;
    }

    private static void enableNdefExchangeMode(Activity activity) {
        mNfcAdapter
                .enableForegroundNdefPush(activity, getMessageAsNdef(""));
        mNfcAdapter.enableForegroundDispatch(activity, mNfcPendingIntent,
                mNdefExchangeFilters, null);
    }

    public static NdefMessage getMessageAsNdef(String message) {
        byte[] textBytes = message.getBytes();
        NdefRecord textRecord = new NdefRecord(NdefRecord.TNF_MIME_MEDIA,
                "text/plain".getBytes(), new byte[] {}, textBytes);
        return new NdefMessage(new NdefRecord[] { textRecord });
    }
}

Related Tutorials