{"id":62758,"date":"2025-02-27T18:41:07","date_gmt":"2025-02-27T13:11:07","guid":{"rendered":"https:\/\/www.oneclickitsolution.com\/blog\/?p=62758"},"modified":"2025-04-01T16:02:42","modified_gmt":"2025-04-01T10:32:42","slug":"nfc-tags-in-flutter","status":"publish","type":"post","link":"https:\/\/www.oneclickitsolution.com\/blog\/nfc-tags-in-flutter","title":{"rendered":"Writing and Reading NFC in Flutter: The Ultimate Guide"},"content":{"rendered":"\n<p>Near Field Communication (NFC) technology enables seamless communication between devices within close proximity. When NFC is enabled on a smartphone, users can easily read and write data to NFC tags, unlocking various real-world applications.<\/p>\n\n\n\n<p>This tutorial will guide you through reading and writing NFC tags in Flutter using the <strong>nfc_manager package<\/strong>. We will create a simple <a href=\"https:\/\/www.oneclickitsolution.com\/blog\/what-is-flutter\" target=\"_blank\" rel=\"noreferrer noopener\">Flutter<\/a> app that:<\/p>\n\n\n\n<p>\u2714 Saves a URL onto an NFC tag. <\/p>\n\n\n\n<p>\u2714 Retrieves the saved URL when the tag is scanned using an NFC-enabled device. <\/p>\n\n\n\n<p>\u2714 Opens the URL automatically in a web browser upon scanning.<\/p>\n\n\n\n<p>By the end of this guide, you&#8217;ll have a solid understanding of Flutter NFC integration and how to implement NFC functionality for both Android and iOS applications.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Benefits of NFC in Flutter<\/h2>\n\n\n\n<p>NFC technology powers various use cases across industries, including: <\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1920\" height=\"1080\" src=\"https:\/\/www.oneclickitsolution.com\/blog\/wp-content\/uploads\/2025\/02\/benefits-of-nfc.png\" alt=\"benefits of nfc in flutter\" class=\"wp-image-62764\" srcset=\"https:\/\/www.oneclickitsolution.com\/blog\/wp-content\/uploads\/2025\/02\/benefits-of-nfc.png 1920w, https:\/\/www.oneclickitsolution.com\/blog\/wp-content\/uploads\/2025\/02\/benefits-of-nfc-768x432.png 768w, https:\/\/www.oneclickitsolution.com\/blog\/wp-content\/uploads\/2025\/02\/benefits-of-nfc-1536x864.png 1536w, https:\/\/www.oneclickitsolution.com\/blog\/wp-content\/uploads\/2025\/02\/benefits-of-nfc-390x220.png 390w, https:\/\/www.oneclickitsolution.com\/blog\/wp-content\/uploads\/2025\/02\/benefits-of-nfc-150x84.png 150w\" sizes=\"(max-width: 1920px) 100vw, 1920px\" \/><\/figure>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Contactless payments<\/li>\n\n\n\n<li>Smart posters with embedded URLs<\/li>\n\n\n\n<li>Digital business cards<\/li>\n\n\n\n<li>Secure authentication &amp; access control<\/li>\n\n\n\n<li>IoT device communication<\/li>\n<\/ul>\n\n\n\n<p>Flutter, a powerful cross-platform framework, allows developers to integrate NFC in Flutter for both Android and iOS. However, NFC writing is currently limited to Android due to Apple\u2019s restrictions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Important Notes for iOS and Android Users<\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>iOS:<\/strong> iPhone 7, 8, and X models do not support automatic NFC background reading. Users must manually activate the NFC reader from the Control Center.<\/li>\n\n\n\n<li><strong>Android:<\/strong> NFC functionality varies by device manufacturer and model. Most modern Android devices support background NFC reading, but some older models may require manual activation in settings.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\">Setting Up the Flutter Project<\/h2>\n\n\n\n<p>To begin, create a new Flutter project:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"html\" class=\"language-html\">flutter create nfc_demo\ncd nfc_demo<\/code><\/pre>\n\n\n\n<p>Next, add the required dependencies to <code>pubspec.yaml<\/code>:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"html\" class=\"language-html\">dependencies:\n  flutter:\n    sdk: flutter\n  nfc_manager: ^3.5.0\n  url_launcher: ^6.3.1<\/code><\/pre>\n\n\n\n<p>Run:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"html\" class=\"language-html\">flutter pub get<\/code><\/pre>\n\n\n\n<p>to install the packages.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Platform-Specific Configurations<\/h2>\n\n\n\n<h3 class=\"wp-block-heading\">Android Configuration<\/h3>\n\n\n\n<p>Modify <code><strong>android\/app\/src\/main\/AndroidManifest.xml<\/strong><\/code> to include NFC permissions:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"html\" class=\"language-html\">&lt;uses-permission android:name=\"android.permission.NFC\" \/&gt;\n&lt;uses-feature android:name=\"android.hardware.nfc\" android:required=\"true\"\/&gt;<\/code><\/pre>\n\n\n\n<p>Declare NFC tech lists:<\/p>\n\n\n\n<ol start=\"2\" class=\"wp-block-list\">\n<li><\/li>\n<\/ol>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"html\" class=\"language-html\">&lt;intent-filter&gt;\n    &lt;action android:name=\"android.nfc.action.NDEF_DISCOVERED\" \/&gt;\n    &lt;category android:name=\"android.intent.category.DEFAULT\" \/&gt;\n    &lt;data android:mimeType=\"text\/plain\" \/&gt;\n&lt;\/intent-filter&gt;<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">iOS Configuration<\/h3>\n\n\n\n<p>Enable NFC capabilities in Xcode and update <code><strong>ios\/Runner\/Info.plist<\/strong><\/code>:<\/p>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"html\" class=\"language-html\">&lt;key&gt;com.apple.developer.nfc.readersession.formats&lt;\/key&gt;\n&lt;array&gt;\n    &lt;string&gt;NDEF&lt;\/string&gt;\n&lt;\/array&gt;\n&lt;key&gt;NSNFCReaderUsageDescription&lt;\/key&gt;\n&lt;string&gt;This app requires access to NFC to read and write data to NFC tags.&lt;\/string&gt;<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Implementing NFC Writing in Flutter<\/h2>\n\n\n\n<p>Let&#8217;s create a UI for users to enter a URL and write it to an NFC tag.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Code for Writing NFC Data (nfc_write_data.dart)<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"html\" class=\"language-html\">import 'package:flutter\/material.dart';\nimport 'package:nfc_manager\/nfc_manager.dart';\nimport 'package:url_launcher\/url_launcher.dart';\nimport 'dart:convert';\n\nclass NfcWriteData extends StatefulWidget {\n  const NfcWriteData({Key? key}) : super(key: key);\n\n  @override\n  State&lt;NfcWriteData&gt; createState() =&gt; _NfcWriteDataState();\n}\n\nclass _NfcWriteDataState extends State&lt;NfcWriteData&gt; {\n  bool _isScanning = false;\n  String _urlToWrite = \"https:\/\/example.com\"; \/\/ Default URL\n\n  @override\n  Widget build(BuildContext context) {\n    return Scaffold(\n      appBar: AppBar(\n        title: const Text('NFC Write &amp; Read'),\n      ),\n      body: Column(\n        children: [\n          TextField(\n            decoration: const InputDecoration(labelText: 'Enter URL to write'),\n            onChanged: (value) =&gt; setState(() {\n              _urlToWrite = value;\n            }),\n          ),\n          ElevatedButton(\n            onPressed: () =&gt; writeData(_urlToWrite),\n            child: const Text(\"Write URL to NFC Tag\"),\n          ),\n          ElevatedButton(\n            onPressed: () =&gt; startReading(),\n            child: const Text(\"Start NFC Reading\"),\n          ),\n        ],\n      ),\n    );\n  }\n\n  void writeData(String url) async {\n    NfcManager.instance.startSession(onDiscovered: (NfcTag tag) async {\n      var ndef = Ndef.from(tag);\n      if (ndef == null || !ndef.isWritable) {\n        _isScanning = false;\n        NfcManager.instance.stopSession();\n        return;\n      }\n\n      NdefMessage message = NdefMessage(\n        [NdefRecord.createUri(Uri.parse(url))], \/\/ Writing URL as URI record\n      );\n\n      try {\n        await ndef.write(message);\n        NfcManager.instance.stopSession();\n        setState(() {\n          _isScanning = false;\n        });\n      } catch (e) {\n        NfcManager.instance.stopSession(errorMessage: e.toString());\n        setState(() {\n          _isScanning = false;\n        });\n      }\n    });\n  }\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\">How It Works<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>Users enter a URL.<\/li>\n\n\n\n<li>The app writes the URL to an NFC tag using <code><strong>NdefRecord.createUri(Uri.parse(url))<\/strong><\/code>.<\/li>\n\n\n\n<li>If writing fails, an error is displayed.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Implementing NFC Reading in Flutter<\/h2>\n\n\n\n<p>A device equipped with NFC technology must read the URL stored on the tag before automatically launching the browser to display it.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Code for Reading NFC Data (Integrated in <strong>nfc_write_data.dart)<\/strong><\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"html\" class=\"language-html\">void startReading() {\n  NfcManager.instance.startSession(onDiscovered: (NfcTag tag) async {\n    var ndef = Ndef.from(tag);\n    if (ndef == null) {\n      NfcManager.instance.stopSession();\n      return;\n    }\n\n    NdefMessage? message = await ndef.read();\n    if (message.records.isNotEmpty) {\n      NdefRecord record = message.records.first;\n      String payload = utf8.decode(record.payload);\n      payload = payload.substring(1); \/\/ Remove identifier byte\n\n      Uri? url = Uri.tryParse(payload);\n      if (url != null &amp;&amp; await canLaunchUrl(url)) {\n        await launchUrl(url); \/\/ Opens URL in browser\n      }\n    }\n\n    NfcManager.instance.stopSession();\n  });\n}<\/code><\/pre>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>How It Works<\/strong><\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>The app listens for NFC tags.<\/li>\n\n\n\n<li>It reads the URL and decodes it.<\/li>\n\n\n\n<li>If a valid URL is found, it opens the browser using <code>url_launcher<\/code>.<\/li>\n<\/ol>\n\n\n\n<h2 class=\"wp-block-heading\">Adding a Visual Indicator for NFC Scanning<\/h2>\n\n\n\n<p>&nbsp;To enhance user experience, we can display a scanning animation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Code (nfc_wrapper_view.dart)<\/h3>\n\n\n\n<pre class=\"wp-block-code\"><code lang=\"html\" class=\"language-html\">import 'package:flutter\/cupertino.dart';\nimport 'package:flutter\/material.dart';\n\nclass NFCWrapperView extends StatelessWidget {\n  const NFCWrapperView({super.key, required bool isScanning}) : _isScanning = isScanning;\n\n  final bool _isScanning;\n\n  @override\n  Widget build(BuildContext context) {\n    return Container(\n      width: 250.0,\n      height: 250.0,\n      decoration: BoxDecoration(\n        color: _isScanning ? Colors.green[100] : Colors.amber[100],\n        shape: BoxShape.circle,\n      ),\n      child: Center(\n        child: Icon(\n          CupertinoIcons.radiowaves_right,\n          size: 100,\n          color: _isScanning ? Colors.green[400] : Colors.amber[400],\n        ),\n      ),\n    );\n  }\n}<\/code><\/pre>\n\n\n\n<h2 class=\"wp-block-heading\">Conclusion<\/h2>\n\n\n\n<p>In this tutorial, we explored Flutter NFC integration by implementing NFC reading and writing using the <code><a href=\"https:\/\/pub.dev\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">nfc_manager<\/a><\/code> package. <\/p>\n\n\n\n<p><strong>We covered:<\/strong><\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Writing a URL to an NFC tag.<\/li>\n\n\n\n<li>Reading and extracting data from an NFC tag. <\/li>\n\n\n\n<li>Automatically opening the URL in a web browser. <\/li>\n\n\n\n<li>The role of an NFC-enabled device in reading and launching the stored URL.<\/li>\n<\/ul>\n\n\n\n<p>You can extend this approach to store contacts, authentication tokens, or custom data formats. Try implementing Flutter NFC reader in your own projects and explore its endless possibilities!<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">FAQs<\/h2>\n\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1740656977915\"><strong class=\"schema-faq-question\"><strong>Why does NFC writing not work on iOS?<\/strong><\/strong> <p class=\"schema-faq-answer\">iOS devices do not support NFC writing due to Apple&#8217;s restrictions. Apple only allows reading NFC tags using the <strong>NFCNDEFReaderSession<\/strong> API, but writing is not permitted for third-party applications.<br\/><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1740657025998\"><strong class=\"schema-faq-question\"><strong>Can all smartphones read and write NFC tags?<\/strong><\/strong> <p class=\"schema-faq-answer\">No, not all smartphones support NFC. While most modern Android devices have NFC functionality, some low-end models might not include NFC hardware. On iOS, only iPhone 7 and newer models support NFC reading, and NFC writing is restricted.<br\/><\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1740657076717\"><strong class=\"schema-faq-question\"><strong>Why does my app fails to detect NFC tags?<\/strong><\/strong> <p class=\"schema-faq-answer\">There could be several reasons:<br\/>1. <strong>NFC is disabled<\/strong> on the device. Ensure that NFC is turned on in the settings.<br\/>2. The tag is <strong>not an NDEF-formatted tag<\/strong>. Only NDEF tags are supported by the nfc_manager package.<br\/>3. <strong>Hardware compatibility issues<\/strong>\u2014some devices may have limited NFC functionality.<br\/>4. <strong>Incorrect intent filters<\/strong> on Android (AndroidManifest.xml should include the correct intent-filter).<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1740657146175\"><strong class=\"schema-faq-question\"><strong>Can I write other types of data (not just URLs) to NFC tags?<\/strong><\/strong> <p class=\"schema-faq-answer\">Yes, you can write various types of data, such as text, contact details (vCard), authentication tokens, and commands for IoT devices. However, your NFC tag must support the required data format.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1740657175188\"><strong class=\"schema-faq-question\"><strong>How do I test NFC functionality without a physical NFC tag?<\/strong><\/strong> <p class=\"schema-faq-answer\">If you don\u2019t have an NFC tag, you can use Android Emulator with NFC support (available in some models) or an NFC-enabled second device in P2P mode. However, iOS does not offer NFC emulation.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1740657200285\"><strong class=\"schema-faq-question\"><strong>Can I use NFC for payments in my Flutter app?<\/strong><\/strong> <p class=\"schema-faq-answer\">No, contactless payments using NFC (such as Apple Pay and Google Pay) require special APIs that are not accessible via nfc_manager. You need to use Apple Pay and Google Pay SDKs for payments.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1740657233798\"><strong class=\"schema-faq-question\"><strong>What are the security concerns with NFC?<\/strong><\/strong> <p class=\"schema-faq-answer\">1. <strong>Data interception:<\/strong> NFC has a short range, but data can still be intercepted if an attacker is close enough.<br\/>2. <strong>Malicious tags:<\/strong> An NFC tag could be programmed to open a phishing website. Always validate the data before launching a URL.<br\/>3. <strong>Unauthorized writing:<\/strong> If a tag is writable, someone else might overwrite the data. Using write protection on NFC tags can prevent this.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1740657287327\"><strong class=\"schema-faq-question\"><strong>Why does the browser not open automatically after reading the NFC tag?<\/strong><\/strong> <p class=\"schema-faq-answer\">This can happen due to:<br\/>1. <strong>Incorrect URL format<\/strong> (ensure the NFC tag contains a valid URI record).<br\/>2. <strong>Permissions issue<\/strong> (on iOS, user interaction is required before launching a URL).<br\/>3. <strong>OS-level restrictions<\/strong> (some Android versions may block automatic navigation for security reasons).<\/p> <\/div> <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Near Field Communication (NFC) technology enables seamless communication between devices within close proximity. When NFC is enabled on a smartphone, users can easily read and write data to NFC tags, unlocking various real-world applications. This tutorial will guide you through reading and writing NFC tags in Flutter using the nfc_manager package. We will create a &hellip;<\/p>\n","protected":false},"author":92,"featured_media":62767,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[516],"tags":[1690,1688,1689,1686,1687],"class_list":["post-62758","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-mobile-apps","tag-flutter-nfc-example","tag-flutter-nfc-tutorial","tag-nfc-flutter","tag-nfc-in-flutter","tag-nfc-tags"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v18.2.1 (Yoast SEO v24.8.1) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Flutter NFC Tutorial: Writing and Reading NFC Tags in Flutter<\/title>\n<meta name=\"description\" content=\"Learn how to read and write NFC tags in Flutter using the nfc_manager package. 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Apple only allows reading NFC tags using the <strong>NFCNDEFReaderSession<\/strong> API, but writing is not permitted for third-party applications.<br\/>","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.oneclickitsolution.com\/blog\/nfc-tags-in-flutter#faq-question-1740657025998","position":2,"url":"https:\/\/www.oneclickitsolution.com\/blog\/nfc-tags-in-flutter#faq-question-1740657025998","name":"Can all smartphones read and write NFC tags?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"No, not all smartphones support NFC. While most modern Android devices have NFC functionality, some low-end models might not include NFC hardware. On iOS, only iPhone 7 and newer models support NFC reading, and NFC writing is restricted.<br\/>","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.oneclickitsolution.com\/blog\/nfc-tags-in-flutter#faq-question-1740657076717","position":3,"url":"https:\/\/www.oneclickitsolution.com\/blog\/nfc-tags-in-flutter#faq-question-1740657076717","name":"Why does my app fails to detect NFC tags?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"There could be several reasons:<br\/>1. <strong>NFC is disabled<\/strong> on the device. Ensure that NFC is turned on in the settings.<br\/>2. The tag is <strong>not an NDEF-formatted tag<\/strong>. Only NDEF tags are supported by the nfc_manager package.<br\/>3. <strong>Hardware compatibility issues<\/strong>\u2014some devices may have limited NFC functionality.<br\/>4. <strong>Incorrect intent filters<\/strong> on Android (AndroidManifest.xml should include the correct intent-filter).","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.oneclickitsolution.com\/blog\/nfc-tags-in-flutter#faq-question-1740657146175","position":4,"url":"https:\/\/www.oneclickitsolution.com\/blog\/nfc-tags-in-flutter#faq-question-1740657146175","name":"Can I write other types of data (not just URLs) to NFC tags?","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"Yes, you can write various types of data, such as text, contact details (vCard), authentication tokens, and commands for IoT devices. 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