{"id":42067,"date":"2025-08-28T20:46:12","date_gmt":"2025-08-28T15:16:12","guid":{"rendered":"https:\/\/mobisoftinfotech.com\/resources\/?p=42067"},"modified":"2025-12-06T16:50:03","modified_gmt":"2025-12-06T11:20:03","slug":"build-nfc-reader-writer-app-flutter-nfc-manager","status":"publish","type":"post","link":"https:\/\/mobisoftinfotech.com\/resources\/blog\/flutter-development\/build-nfc-reader-writer-app-flutter-nfc-manager","title":{"rendered":"Complete Guide to Building NFC Reader and Writer Apps in Flutter Using NFC Manager Package &#8211; Step-by-Step Tutorial"},"content":{"rendered":"<p>Near Field Communication (NFC) is a short-range wireless technology that lets devices share data when they are close. You find it in contactless payments, smart business cards, and other daily tools that make life easy. For mobile developers, adding an NFC reader and writer to apps opens up many possibilities.<\/p>\n\n\n\n<p>Flutter, Google\u2019s UI toolkit, lets you build apps for mobile, web, and desktop from one codebase. It makes creating cross-platform apps with rich features more efficient. The NFC Manager Flutter packag<strong>e<\/strong> helps implement NFC reader writer features on both Android and iOS. This step-by-step tutorial will show how to build an NFC app in Flutter that can read from and write to NFC tags.<\/p>\n\n\n\n<p>Businesses can also partner with professional<a href=\"https:\/\/mobisoftinfotech.com\/services\/flutter-app-development-company?utm_source=blog_cta&amp;utm_campaign=build-nfc-reader-writer-app-flutter-nfc-manager\"> Flutter app development services<\/a> to streamline development and ensure robust NFC functionality.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Project Setup for Your Flutter NFC Project<\/strong><\/h2>\n\n\n\n<p>Before we dive into the code, let&#8217;s get our project set up and ready.<\/p>\n\n\n\n<h3 class=\"wp-block-heading h3-list\"><strong><strong>Prerequisites for Implementing NFC in Flutter<\/strong><\/strong><\/h3>\n\n\n\n<p>Make sure you have the following installed and ready:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Flutter SDK:<\/strong> Install the Flutter SDK by following the official documentation.<\/li>\n\n\n\n<li><strong>Basic understanding of Dart and Flutter:<\/strong> You need to know the basics of the Dart language and the Flutter framework.<\/li>\n\n\n\n<li><strong>A physical device that supports NFC:<\/strong> You cannot test Flutter NFC reader writer apps on simulators or emulators. You need an Android or iOS device that supports NFC.<\/li>\n<\/ul>\n\n\n\n<p>For scaling teams or projects, you can also consider working with<a href=\"https:\/\/mobisoftinfotech.com\/services\/hire-flutter-developers?utm_source=blog&amp;utm_campaign=build-nfc-reader-writer-app-flutter-nfc-manager\"> dedicated Flutter developers for hire<\/a> to speed up implementation.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/mobisoftinfotech.com\/services\/flutter-app-development-company?utm_source=blog_cta&amp;utm_campaign=build-nfc-reader-writer-app-flutter-nfc-manager\"><noscript><img decoding=\"async\" width=\"855\" height=\"363\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/08\/flutter-nfc-growth.png\" alt=\"Flutter NFC app development for growth\" class=\"wp-image-42093\" title=\"Flutter NFC Tutorial for Business Growth\"><\/noscript><img decoding=\"async\" width=\"855\" height=\"363\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20855%20363%22%3E%3C%2Fsvg%3E\" alt=\"Flutter NFC app development for growth\" class=\"wp-image-42093 lazyload\" title=\"Flutter NFC Tutorial for Business Growth\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/08\/flutter-nfc-growth.png\"><\/a><\/figure>\n\n\n\n<h3 class=\"wp-block-heading h3-list\"><strong><strong><strong>Creating a New Flutter Project<\/strong><\/strong><\/strong><\/h3>\n\n\n\n<p>To start, create a new Flutter project by running the following command in your terminal:<\/p>\n\n\n<pre class=\"wp-block-code\"><span><code class=\"hljs\">flutter create nfc_demo<\/code><\/span><\/pre>\n\n\n<p>This will create a new directory named nfc_demo with the basic Flutter project structure. Open this project in your favorite IDE, such as Visual Studio Code or Android Studio.<\/p>\n\n\n\n<p>If you\u2019re new, our<a href=\"https:\/\/mobisoftinfotech.com\/resources\/blog\/flutter-development\/flutter-state-management-bloc-tutorial?utm_source=blog&amp;utm_campaign=build-nfc-reader-writer-app-flutter-nfc-manager\"> Flutter BLoC state management tutorial<\/a> is a good place to start learning about state handling in apps.<\/p>\n\n\n\n<h3 class=\"wp-block-heading h3-list\"><strong><strong><strong>Adding Dependencies<\/strong><\/strong><\/strong><\/h3>\n\n\n\n<p>Next, we need to add the nfc_manager package to our project. Open the pubspec.yaml file and add the following line under dependencies:<\/p>\n\n\n\n<p>YAML<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-1\" data-shcb-language-name=\"CSS\" data-shcb-language-slug=\"css\"><span><code class=\"hljs language-css\"><span class=\"hljs-selector-tag\">dependencies<\/span>:\n <span class=\"hljs-selector-tag\">flutter<\/span>:\n   <span class=\"hljs-selector-tag\">sdk<\/span>: <span class=\"hljs-selector-tag\">flutter<\/span>\n\n # <span class=\"hljs-selector-tag\">The<\/span> <span class=\"hljs-selector-tag\">following<\/span> <span class=\"hljs-selector-tag\">adds<\/span> <span class=\"hljs-selector-tag\">the<\/span> <span class=\"hljs-selector-tag\">Cupertino<\/span> <span class=\"hljs-selector-tag\">Icons<\/span> <span class=\"hljs-selector-tag\">font<\/span> <span class=\"hljs-selector-tag\">to<\/span> <span class=\"hljs-selector-tag\">your<\/span> <span class=\"hljs-selector-tag\">application<\/span>.\n # <span class=\"hljs-selector-tag\">Use<\/span> <span class=\"hljs-selector-tag\">with<\/span> <span class=\"hljs-selector-tag\">the<\/span> <span class=\"hljs-selector-tag\">CupertinoIcons<\/span> <span class=\"hljs-selector-tag\">class<\/span> <span class=\"hljs-selector-tag\">for<\/span> <span class=\"hljs-selector-tag\">iOS<\/span> <span class=\"hljs-selector-tag\">style<\/span> <span class=\"hljs-selector-tag\">icons<\/span>.\n <span class=\"hljs-selector-tag\">cupertino_icons<\/span>: ^1<span class=\"hljs-selector-class\">.0<\/span><span class=\"hljs-selector-class\">.8<\/span>\n<span class=\"hljs-selector-tag\">nfc_manager<\/span>: ^4<span class=\"hljs-selector-class\">.0<\/span><span class=\"hljs-selector-class\">.2<\/span>\n<span class=\"hljs-selector-tag\">nfc_manager_ndef<\/span>: ^1<span class=\"hljs-selector-class\">.0<\/span><span class=\"hljs-selector-class\">.1<\/span>\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-1\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">CSS<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">css<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>After adding the dependency, run the following command in your terminal to install it:<\/p>\n\n\n\n<p>Bash<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-2\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\">flutter pub <span class=\"hljs-keyword\">get<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-2\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>The nfc_manager Flutter package is the core dependency that provides the necessary APIs to interact with the device\u2019s NFC hardware for reading and writing NFC tags.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Implementing NFC Features<\/strong><\/h2>\n\n\n\n<p>With the project set up, we can now start implementing NFC in Flutter.<\/p>\n\n\n\n<h3 class=\"wp-block-heading h3-list\"><strong><strong><strong>Checking for NFC Availability<\/strong><\/strong><\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><noscript><img decoding=\"async\" width=\"855\" height=\"383\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/08\/nfc-operations-flow-flutter.png\" alt=\"NFC reader writer Flutter step-by-step operations flow\" class=\"wp-image-42096\" title=\"NFC Reader Writer Flow in Flutter\"><\/noscript><img decoding=\"async\" width=\"855\" height=\"383\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20855%20383%22%3E%3C%2Fsvg%3E\" alt=\"NFC reader writer Flutter step-by-step operations flow\" class=\"wp-image-42096 lazyload\" title=\"NFC Reader Writer Flow in Flutter\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/08\/nfc-operations-flow-flutter.png\"><\/figure>\n\n\n\n<p>Before attempting any NFC operation, it&#8217;s crucial to check if the device hardware actually supports NFC. This prevents errors and allows you to provide a better user experience by, for example, disabling NFC-related UI elements.<\/p>\n\n\n\n<p><strong>Code Snippet:<\/strong><\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-3\" data-shcb-language-name=\"JavaScript\" data-shcb-language-slug=\"javascript\"><span><code class=\"hljs language-javascript\"><span class=\"hljs-keyword\">import<\/span> <span class=\"hljs-string\">'dart:io'<\/span>;\n<span class=\"hljs-keyword\">import<\/span> <span class=\"hljs-string\">'dart:typed_data'<\/span>;\n\n<span class=\"hljs-keyword\">import<\/span> <span class=\"hljs-string\">'package:flutter\/material.dart'<\/span>;\n<span class=\"hljs-keyword\">import<\/span> <span class=\"hljs-string\">'package:nfc_manager\/ndef_record.dart'<\/span>;\n<span class=\"hljs-keyword\">import<\/span> <span class=\"hljs-string\">'package:nfc_manager\/nfc_manager.dart'<\/span>;\n<span class=\"hljs-keyword\">import<\/span> <span class=\"hljs-string\">'package:nfc_manager_ndef\/nfc_manager_ndef.dart'<\/span>;\n<span class=\"hljs-keyword\">import<\/span> <span class=\"hljs-string\">'package:nfc_manager\/src\/nfc_manager_android\/pigeon.g.dart'<\/span>;\n\n<span class=\"hljs-keyword\">import<\/span> <span class=\"hljs-string\">'nfc_scan_result.dart'<\/span>;\n\n\n<span class=\"hljs-comment\">\/\/ A boolean to check if NFC is available on the device.<\/span>\nbool isNfcAvailable = <span class=\"hljs-literal\">false<\/span>;\n\nFuture&lt;<span class=\"hljs-keyword\">void<\/span>&gt; _checkNfcAvailability() <span class=\"hljs-keyword\">async<\/span> {\n setState(() <span class=\"hljs-keyword\">async<\/span> {\n   isNfcAvailable = <span class=\"hljs-keyword\">await<\/span> NfcManager.instance.isAvailable();\n });\n}\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-3\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">JavaScript<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">javascript<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h4 class=\"wp-block-heading\"><strong>Code Explanation:<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li>NfcManager.instance.isAvailable(): This asynchronous method returns a Future&lt;void&gt; which resolves to true if the device has NFC hardware and it is enabled, and false otherwise.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading h3-list\"><strong><strong><strong>Reading NFC Tags<\/strong><\/strong><\/strong><\/h3>\n\n\n\n<p>To start reading an NFC tag, you need to initiate a session and listen for tag discovery. This is the first step in building a Flutter NFC reader app.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Code Snippet:<\/strong><\/h4>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-4\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">void startRead(BuildContext context) async {\n  <span class=\"hljs-keyword\">if<\/span> (_isScanning) <span class=\"hljs-keyword\">return<\/span>;\n\n  setState(() {\n    _isScanning = <span class=\"hljs-keyword\">true<\/span>;\n    _status = <span class=\"hljs-string\">'Hold a tag near the device...'<\/span>;\n  });\n\n  <span class=\"hljs-keyword\">try<\/span> {\n    await NfcManager.instance.startSession(\n      pollingOptions: {NfcPollingOption.iso14443},\n      onDiscovered: (NfcTag tag) async {\n        <span class=\"hljs-keyword\">try<\/span> {\n          <span class=\"hljs-keyword\">final<\/span> result = await _readTagData(tag);\n\n          <span class=\"hljs-comment\">\/\/ Extract NDEF Text record (RTD-Text) if present<\/span>\n          <span class=\"hljs-keyword\">final<\/span> ndefText = extractNdefText(result);\n\n          setState(() {\n            _status = (ndefText != <span class=\"hljs-keyword\">null<\/span> &amp;&amp; ndefText.isNotEmpty)\n                ? <span class=\"hljs-string\">'Tag read successfully! Text: $ndefText'<\/span>\n                : <span class=\"hljs-string\">'Tag read successfully! No valid NDEF text found.'<\/span>;\n          });\n        } <span class=\"hljs-keyword\">catch<\/span> (e) {\n          setState(() {\n            _status = <span class=\"hljs-string\">'Error during read: $e'<\/span>;\n          });\n        } <span class=\"hljs-keyword\">finally<\/span> {\n          await NfcManager.instance.stopSession();\n          setState(() =&gt; _isScanning = <span class=\"hljs-keyword\">false<\/span>);\n        }\n      },\n    );\n  } <span class=\"hljs-keyword\">catch<\/span> (e) {\n    setState(() {\n      _status = <span class=\"hljs-string\">'Failed to start NFC session: $e'<\/span>;\n      _isScanning = <span class=\"hljs-keyword\">false<\/span>;\n    });\n  }\n}\n\nString? extractNdefText(NFCScanResult result) {\n  <span class=\"hljs-keyword\">final<\/span> ndef = result.data&#091;<span class=\"hljs-string\">'ndef'<\/span>];\n  <span class=\"hljs-keyword\">if<\/span> (ndef is Map &amp;&amp; ndef&#091;<span class=\"hljs-string\">'records'<\/span>] is <span class=\"hljs-keyword\">List<\/span> &amp;&amp; ndef&#091;<span class=\"hljs-string\">'records'<\/span>].isNotEmpty) {\n    <span class=\"hljs-keyword\">final<\/span> record = ndef&#091;<span class=\"hljs-string\">'records'<\/span>]&#091;<span class=\"hljs-number\">0<\/span>];\n    <span class=\"hljs-keyword\">if<\/span> (record is Map &amp;&amp; record&#091;<span class=\"hljs-string\">'type'<\/span>] != <span class=\"hljs-keyword\">null<\/span> &amp;&amp; record&#091;<span class=\"hljs-string\">'payload'<\/span>] != <span class=\"hljs-keyword\">null<\/span>) {\n      <span class=\"hljs-keyword\">final<\/span> typeBytes = record&#091;<span class=\"hljs-string\">'type'<\/span>];\n      <span class=\"hljs-keyword\">final<\/span> payloadBytes = record&#091;<span class=\"hljs-string\">'payload'<\/span>];\n      <span class=\"hljs-keyword\">if<\/span> (typeBytes is <span class=\"hljs-keyword\">List<\/span> &amp;&amp; String.fromCharCodes(typeBytes) == <span class=\"hljs-string\">'T'<\/span> &amp;&amp; payloadBytes is <span class=\"hljs-keyword\">List<\/span>) {\n        <span class=\"hljs-keyword\">final<\/span> payload = Uint8List.fromList(payloadBytes);\n        <span class=\"hljs-keyword\">if<\/span> (payload.isEmpty) <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-keyword\">null<\/span>;\n\n        <span class=\"hljs-comment\">\/\/ NFC Forum Text RTD:<\/span>\n        <span class=\"hljs-comment\">\/\/ payload&#091;0] = status byte<\/span>\n        <span class=\"hljs-comment\">\/\/ bit7: 0=UTF-8, 1=UTF-16<\/span>\n        <span class=\"hljs-comment\">\/\/ bits0..5: language code length (n)<\/span>\n        <span class=\"hljs-comment\">\/\/ payload&#091;1..n]: language code<\/span>\n        <span class=\"hljs-comment\">\/\/ payload&#091;1+n..]: text<\/span>\n        <span class=\"hljs-keyword\">final<\/span> status = payload;\n        <span class=\"hljs-keyword\">final<\/span> isUtf16 = (status &amp; <span class=\"hljs-number\">0x80<\/span>) != <span class=\"hljs-number\">0<\/span>;\n        <span class=\"hljs-keyword\">final<\/span> langLen = status &amp; <span class=\"hljs-number\">0x3F<\/span>;\n\n        <span class=\"hljs-keyword\">if<\/span> (payload.length &lt; <span class=\"hljs-number\">1<\/span> + langLen) <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-keyword\">null<\/span>;\n\n        <span class=\"hljs-keyword\">final<\/span> textBytes = payload.sublist(<span class=\"hljs-number\">1<\/span> + langLen);\n        <span class=\"hljs-keyword\">try<\/span> {\n          <span class=\"hljs-keyword\">return<\/span> isUtf16 ? String.fromCharCodes(textBytes) : utf8.decode(textBytes);\n        } <span class=\"hljs-keyword\">catch<\/span> (_) {\n          <span class=\"hljs-keyword\">return<\/span> String.fromCharCodes(textBytes);\n        }\n      }\n    }\n  }\n  <span class=\"hljs-keyword\">return<\/span> <span class=\"hljs-keyword\">null<\/span>;\n}\n\nFuture&lt;NFCScanResult&gt; _readTagData(NfcTag tag) async {\n  <span class=\"hljs-keyword\">final<\/span> result = NFCScanResult(\n    tag: tag,\n    timestamp: DateTime.now(),\n    tagType: <span class=\"hljs-string\">'Unknown'<\/span>,\n    uid: <span class=\"hljs-string\">'Unknown'<\/span>,\n    data: {},\n  );\n\n  <span class=\"hljs-keyword\">try<\/span> {\n    <span class=\"hljs-comment\">\/\/ Extract UID from common locations in raw map<\/span>\n    <span class=\"hljs-keyword\">final<\/span> raw = tag.data;\n    <span class=\"hljs-keyword\">List<\/span>&lt;int&gt;? idBytes;\n    <span class=\"hljs-keyword\">if<\/span> (raw is Map &amp;&amp; raw&#091;<span class=\"hljs-string\">'id'<\/span>] is <span class=\"hljs-keyword\">List<\/span>) {\n      idBytes = (raw&#091;<span class=\"hljs-string\">'id'<\/span>] <span class=\"hljs-keyword\">as<\/span> <span class=\"hljs-keyword\">List<\/span>).cast&lt;int&gt;();\n    } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span> (raw is Map &amp;&amp; raw&#091;<span class=\"hljs-string\">'nfca'<\/span>] is Map &amp;&amp; raw&#091;<span class=\"hljs-string\">'nfca'<\/span>]&#091;<span class=\"hljs-string\">'identifier'<\/span>] is <span class=\"hljs-keyword\">List<\/span>) {\n      idBytes = (raw&#091;<span class=\"hljs-string\">'nfca'<\/span>]&#091;<span class=\"hljs-string\">'identifier'<\/span>] <span class=\"hljs-keyword\">as<\/span> <span class=\"hljs-keyword\">List<\/span>).cast&lt;int&gt;();\n    } <span class=\"hljs-keyword\">else<\/span> <span class=\"hljs-keyword\">if<\/span> (raw is Map &amp;&amp; raw&#091;<span class=\"hljs-string\">'mifareclassic'<\/span>] is Map &amp;&amp; raw&#091;<span class=\"hljs-string\">'mifareclassic'<\/span>]&#091;<span class=\"hljs-string\">'identifier'<\/span>] is <span class=\"hljs-keyword\">List<\/span>) {\n      idBytes = (raw&#091;<span class=\"hljs-string\">'mifareclassic'<\/span>]&#091;<span class=\"hljs-string\">'identifier'<\/span>] <span class=\"hljs-keyword\">as<\/span> <span class=\"hljs-keyword\">List<\/span>).cast&lt;int&gt;();\n    }\n\n    <span class=\"hljs-keyword\">if<\/span> (idBytes != <span class=\"hljs-keyword\">null<\/span>) {\n      <span class=\"hljs-keyword\">final<\/span> uid = idBytes.map((b) =&gt; b.toRadixString(<span class=\"hljs-number\">16<\/span>).padLeft(<span class=\"hljs-number\">2<\/span>, <span class=\"hljs-string\">'0'<\/span>)).join().toUpperCase();\n      result.uid = uid;\n      result.data&#091;<span class=\"hljs-string\">'UID'<\/span>] = uid;\n    }\n\n    <span class=\"hljs-keyword\">final<\/span> ndef = Ndef.from(tag);\n    <span class=\"hljs-keyword\">if<\/span> (ndef != <span class=\"hljs-keyword\">null<\/span>) {\n      result.tagType = <span class=\"hljs-string\">'NDEF'<\/span>;\n      <span class=\"hljs-keyword\">if<\/span> (ndef.cachedMessage != <span class=\"hljs-keyword\">null<\/span>) {\n        <span class=\"hljs-keyword\">final<\/span> message = ndef.cachedMessage!;\n        result.data&#091;<span class=\"hljs-string\">'ndef'<\/span>] = {\n          <span class=\"hljs-string\">'records'<\/span>: message.records.map((record) {\n            <span class=\"hljs-keyword\">return<\/span> {\n              <span class=\"hljs-string\">'type'<\/span>: record.type,\n              <span class=\"hljs-string\">'payload'<\/span>: record.payload,\n              <span class=\"hljs-string\">'tnf'<\/span>: record.typeNameFormat.index,\n              <span class=\"hljs-string\">'id'<\/span>: record.identifier,\n            };\n          }).toList(),\n        };\n      } <span class=\"hljs-keyword\">else<\/span> {\n        result.data&#091;<span class=\"hljs-string\">'ndef'<\/span>] = {<span class=\"hljs-string\">'records'<\/span>: &lt;Map&lt;String, dynamic&gt;&gt;&#091;]};\n      }\n    } <span class=\"hljs-keyword\">else<\/span> {\n      result.tagType = <span class=\"hljs-string\">'Non-NDEF'<\/span>;\n    }\n  } <span class=\"hljs-keyword\">catch<\/span> (e) {\n    result.data&#091;<span class=\"hljs-string\">'error'<\/span>] = e.toString();\n  }\n\n  <span class=\"hljs-keyword\">return<\/span> result;\n}\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-4\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h4 class=\"wp-block-heading\"><strong>Code Explanation:<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>NfcManager.instance.startSession(&#8230;):<\/strong> This function starts an NFC reader\/writer Flutter session.<\/li>\n\n\n\n<li><strong>onDiscovered: (NfcTag tag) async { &#8230; }:<\/strong> This callback is executed when an NFC tag is discovered. The NfcTag object contains the data.<\/li>\n\n\n\n<li><strong>Ndef.from(tag): <\/strong>We get the NDEF (NFC Data Exchange Format) specific data from the tag.<\/li>\n\n\n\n<li><strong>NfcManager.instance.stopSession():<\/strong> It&#8217;s important to stop the session after processing the tag to release system resources.<\/li>\n\n\n\n<li><strong>extractNdefText(&#8230;):<\/strong> Parses the first NDEF Text Record (type &#8216;T&#8217;) and decodes the text according to the NFC Forum Text RTD specification.<\/li>\n\n\n\n<li><strong>UID extraction:<\/strong> Reads the tag\u2019s unique identifier from the raw tag map and formats it as an uppercase hex string.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading h3-list\"><strong><strong><strong>Handling Permissions<\/strong><\/strong><\/strong><\/h3>\n\n\n\n<figure class=\"wp-block-image size-full\"><noscript><img decoding=\"async\" width=\"855\" height=\"571\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/08\/flutter-nfc-permissions.png\" alt=\"Flutter nfc_manager permissions Android iOS\" class=\"wp-image-42094\" title=\"NFC Manager Permission Setup\"><\/noscript><img decoding=\"async\" width=\"855\" height=\"571\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20855%20571%22%3E%3C%2Fsvg%3E\" alt=\"Flutter nfc_manager permissions Android iOS\" class=\"wp-image-42094 lazyload\" title=\"NFC Manager Permission Setup\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/08\/flutter-nfc-permissions.png\"><\/figure>\n\n\n\n<p>For iOS, you need to add the &#8220;Near Field Communication Tag Reading&#8221; capability in Xcode. You also need to add the following key to your Info.plist file:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-5\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\">info.plist\n<span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">key<\/span>&gt;<\/span>NFCReaderUsageDescription<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">key<\/span>&gt;<\/span>\n  <span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">string<\/span>&gt;<\/span>NFC is used to read tags.<span class=\"hljs-tag\">&lt;\/<span class=\"hljs-name\">string<\/span>&gt;<\/span>\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-5\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>For Android, add the following permission to your AndroidManifest.xml file:<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-6\" data-shcb-language-name=\"HTML, XML\" data-shcb-language-slug=\"xml\"><span><code class=\"hljs language-xml\"><span class=\"hljs-tag\">&lt;<span class=\"hljs-name\">uses-permission<\/span> <span class=\"hljs-attr\">android:name<\/span>=<span class=\"hljs-string\">\"android.permission.NFC\"<\/span> \/&gt;<\/span><\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-6\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">HTML, XML<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">xml<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<p>Following platform-specific practices ensures smooth integration, which is why many enterprises rely on an experienced<a href=\"https:\/\/mobisoftinfotech.com\/services\/mobile-app-development-company?utm_source=blog&amp;utm_campaign=build-nfc-reader-writer-app-flutter-nfc-manager\"> mobile app development company<\/a> to guide them through multi-platform NFC implementation.<\/p>\n\n\n\n<h3 class=\"wp-block-heading h3-list\"><strong><strong><strong>Writing to NFC Tags<\/strong><\/strong><\/strong><\/h3>\n\n\n\n<p>Writing data to NFC tags in Flutter is also straightforward.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>Code Snippet:<\/strong><\/h4>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-7\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">Future&lt;void&gt; _startNFCWrite() async {\n  <span class=\"hljs-keyword\">final<\/span> text = _writeTextController.text.trim();\n  <span class=\"hljs-keyword\">if<\/span> (text.isEmpty) {\n    setState(() {\n      _status = <span class=\"hljs-string\">'Please enter text to write to the NFC card'<\/span>;\n    });\n    <span class=\"hljs-keyword\">return<\/span>;\n  }\n\n  <span class=\"hljs-keyword\">try<\/span> {\n    setState(() {\n      _isScanning = <span class=\"hljs-keyword\">true<\/span>;\n      _status = _isIOS\n          ? <span class=\"hljs-string\">'Hold a writable NFC card near the top of your iPhone...'<\/span>\n          : <span class=\"hljs-string\">'Hold a writable NFC card near the back of your device...'<\/span>;\n    });\n\n    await NfcManager.instance.startSession(\n      pollingOptions: {NfcPollingOption.iso14443},\n      onDiscovered: (NfcTag tag) async {\n        <span class=\"hljs-keyword\">try<\/span> {\n          <span class=\"hljs-keyword\">final<\/span> ndef = Ndef.from(tag);\n          <span class=\"hljs-keyword\">if<\/span> (ndef == <span class=\"hljs-keyword\">null<\/span>) {\n            <span class=\"hljs-keyword\">throw<\/span> <span class=\"hljs-keyword\">Exception<\/span>(<span class=\"hljs-string\">'This tag does not support NDEF'<\/span>);\n          }\n          <span class=\"hljs-keyword\">if<\/span> (!ndef.isWritable) {\n            <span class=\"hljs-keyword\">throw<\/span> <span class=\"hljs-keyword\">Exception<\/span>(<span class=\"hljs-string\">'This tag is not writable'<\/span>);\n          }\n\n          <span class=\"hljs-comment\">\/\/ Build an NDEF Text Record (type 'T') using NFC Forum Text RTD<\/span>\n          <span class=\"hljs-keyword\">final<\/span> languageCode = <span class=\"hljs-string\">'en'<\/span>;\n          <span class=\"hljs-keyword\">final<\/span> langBytes = utf8.encode(languageCode);\n          <span class=\"hljs-keyword\">final<\/span> textBytes = utf8.encode(text);\n          <span class=\"hljs-keyword\">final<\/span> statusByte = langBytes.length &amp; <span class=\"hljs-number\">0x3F<\/span>; <span class=\"hljs-comment\">\/\/ bit7=0 (UTF-8), lower 6 = lang length<\/span>\n\n          <span class=\"hljs-keyword\">final<\/span> payload = Uint8List.fromList(&#091;\n            statusByte,\n            ...langBytes,\n            ...textBytes,\n          ]);\n\n          <span class=\"hljs-keyword\">final<\/span> textRecord = NdefRecord(\n            typeNameFormat: TypeNameFormat.wellKnown,\n            type: Uint8List.fromList(<span class=\"hljs-string\">'T'<\/span>.codeUnits),\n            identifier: Uint8List(<span class=\"hljs-number\">0<\/span>),\n            payload: payload,\n          );\n\n          <span class=\"hljs-keyword\">final<\/span> message = NdefMessage(records: &#091;textRecord]);\n          await ndef.write(message: message);\n\n          setState(() {\n            _status = <span class=\"hljs-string\">'Data written successfully to NFC card!'<\/span>;\n          });\n        } <span class=\"hljs-keyword\">catch<\/span> (e) {\n          setState(() {\n            _status = <span class=\"hljs-string\">'Error writing to card: $e'<\/span>;\n          });\n        } <span class=\"hljs-keyword\">finally<\/span> {\n          await NfcManager.instance.stopSession();\n          setState(() =&gt; _isScanning = <span class=\"hljs-keyword\">false<\/span>);\n        }\n      },\n    );\n  } <span class=\"hljs-keyword\">catch<\/span> (e) {\n    setState(() {\n      _isScanning = <span class=\"hljs-keyword\">false<\/span>;\n      _status = <span class=\"hljs-string\">'Error starting NFC write: $e'<\/span>;\n    });\n  }\n}\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-7\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h4 class=\"wp-block-heading\"><strong>Code Breakdown:<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>NfcManager.instance.startSession(&#8230;):<\/strong> This function starts an NFC write session in Flutter for writing.<\/li>\n\n\n\n<li><strong>onDiscovered: (NfcTag tag) async { &#8230; }:<\/strong> Triggered when a tag is detected and ready for write operations.<\/li>\n\n\n\n<li><strong>Ndef.from(tag):<\/strong> Retrieves the NDEF interface for the detected tag.<\/li>\n\n\n\n<li><strong>ndef.isWritable: <\/strong>Ensures the tag supports writing before proceeding.<\/li>\n\n\n\n<li><strong>NdefMessage(&#8230;) + NdefRecord(&#8230;):<\/strong> We construct an NFC Forum Text record (type \u2018T\u2019) with a proper status byte, language code, and UTF-8 text payload.<\/li>\n\n\n\n<li><strong>ndef.write(message: message):<\/strong> Writes the NDEF message to the tag.<\/li>\n\n\n\n<li><strong>NfcManager.instance.stopSession():<\/strong> We stop the session after the write is complete or if an error occurs.<\/li>\n<\/ul>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>User Interface (UI) Design<\/strong><\/h2>\n\n\n\n<figure class=\"wp-block-image size-full\"><noscript><img decoding=\"async\" width=\"855\" height=\"385\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/08\/flutter-nfc-app-screens.png\" alt=\"Flutter NFC project app screens with NFC reader writer features\" class=\"wp-image-42092\" title=\"Flutter NFC Project Screens\"><\/noscript><img decoding=\"async\" width=\"855\" height=\"385\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20855%20385%22%3E%3C%2Fsvg%3E\" alt=\"Flutter NFC project app screens with NFC reader writer features\" class=\"wp-image-42092 lazyload\" title=\"Flutter NFC Project Screens\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/08\/flutter-nfc-app-screens.png\"><\/figure>\n\n\n\n<p>A simple, intuitive Flutter NFC reader writer UI improves the experience.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>UI Code Snippet:<\/strong><\/h4>\n\n\n\n<p>Dart<\/p>\n\n\n<pre class=\"wp-block-code\" aria-describedby=\"shcb-language-8\" data-shcb-language-name=\"PHP\" data-shcb-language-slug=\"php\"><span><code class=\"hljs language-php\">@override\nvoid initState() {\n  super.initState();\n  _checkNfcAvailability();\n}\n@override\nvoid dispose() {\n  _writeTextController.dispose();\n  super.dispose();\n}\n@override\nWidget build(BuildContext context) {\n  <span class=\"hljs-keyword\">return<\/span> Scaffold(\n    appBar: AppBar(title: <span class=\"hljs-keyword\">const<\/span> Text(<span class=\"hljs-string\">'NFC Reader\/Writer'<\/span>)),\n    body: Center(\n      child: isNfcAvailable\n          ? Padding(\n              padding: <span class=\"hljs-keyword\">const<\/span> EdgeInsets.all(<span class=\"hljs-number\">16.0<\/span>),\n              child: Column(\n                mainAxisAlignment: MainAxisAlignment.center,\n                children: &lt;Widget&gt;&#091;\n                  Text(<span class=\"hljs-string\">'Status: $_status'<\/span>),\n                  <span class=\"hljs-keyword\">const<\/span> SizedBox(height: <span class=\"hljs-number\">16<\/span>),\n                  ElevatedButton(\n                    onPressed: _isScanning ? <span class=\"hljs-keyword\">null<\/span> : () =&gt; startRead(context),\n                    child: <span class=\"hljs-keyword\">const<\/span> Text(<span class=\"hljs-string\">'Read NFC Tag'<\/span>),\n                  ),\n                  <span class=\"hljs-keyword\">const<\/span> SizedBox(height: <span class=\"hljs-number\">24<\/span>),\n                  TextField(\n                    controller: _writeTextController,\n                    decoration: <span class=\"hljs-keyword\">const<\/span> InputDecoration(\n                      labelText: <span class=\"hljs-string\">'Text to write'<\/span>,\n                      border: OutlineInputBorder(),\n                    ),\n                  ),\n                  <span class=\"hljs-keyword\">const<\/span> SizedBox(height: <span class=\"hljs-number\">12<\/span>),\n                  ElevatedButton(\n                    onPressed: _isScanning ? <span class=\"hljs-keyword\">null<\/span> : _startNFCWrite,\n                    child: <span class=\"hljs-keyword\">const<\/span> Text(<span class=\"hljs-string\">'Write to NFC Tag'<\/span>),\n                  ),\n                ],\n              ),\n            )\n          : <span class=\"hljs-keyword\">const<\/span> Text(<span class=\"hljs-string\">'NFC not available in this device'<\/span>),\n    ),\n  );}\n<\/code><\/span><small class=\"shcb-language\" id=\"shcb-language-8\"><span class=\"shcb-language__label\">Code language:<\/span> <span class=\"shcb-language__name\">PHP<\/span> <span class=\"shcb-language__paren\">(<\/span><span class=\"shcb-language__slug\">php<\/span><span class=\"shcb-language__paren\">)<\/span><\/small><\/pre>\n\n\n<h4 class=\"wp-block-heading\"><strong>Code Explanation:<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>_checkNfcAvailability():<\/strong> Checks if the device supports NFC and updates the UI.<\/li>\n\n\n\n<li><strong>ElevatedButton (Read):<\/strong> Starts an NFC read session and listens for tag discovery.<\/li>\n\n\n\n<li><strong>TextField + ElevatedButton (Write): <\/strong>Accepts user input and writes it as an NDEF Text record to a writable tag.<\/li>\n\n\n\n<li><strong>Disabled buttons while scanning: <\/strong>Prevents multiple sessions and improves user experience.<\/li>\n<\/ul>\n\n\n\n<p>If you plan to extend your NFC-enabled app with networking, you can check out our<a href=\"https:\/\/mobisoftinfotech.com\/resources\/blog\/flutter-development\/flutter-dio-tutorial-http-client?utm_source=blog&amp;utm_campaign=build-nfc-reader-writer-app-flutter-nfc-manager\"> Flutter Dio HTTP client tutorial<\/a> for efficient API integration.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Testing the Application<\/strong><\/h2>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Connect your NFC-enabled device to your computer.<\/li>\n\n\n\n<li>Run the app using flutter run.<\/li>\n\n\n\n<li>The UI will tell you if NFC is available. If it is, tap the &#8220;Read NFC Tag&#8221; button and bring an NFC tag close to your device&#8217;s NFC antenna (usually on the back).<\/li>\n\n\n\n<li>To write, enter text, tap the &#8220;Write to NFC Tag&#8221; button, and bring a writable NFC tag near the device.<\/li>\n<\/ul>\n\n\n\n<p>For apps with heavy processing in the background, you can also explore<a href=\"https:\/\/mobisoftinfotech.com\/resources\/blog\/flutter-development\/flutter-isolates-background-processing?utm_source=blog&amp;utm_medium=internal_link&amp;utm_campaign=build-nfc-reader-writer-app-flutter-nfc-manager&amp;utm_content=flutter-isolates-background-processing\"> Flutter isolates background processing<\/a> to improve responsiveness.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><strong>Conclusion<\/strong><\/h2>\n\n\n\n<p>The nfc_manager Flutter package makes it easy to add solid NFC reader and writer functionality to your Flutter apps. We have established the flow of NFC checking for NFC<strong>&nbsp; <\/strong>availability, reading NFC<strong> <\/strong>tags, writing <strong>&nbsp;<\/strong>NDEF records, and handling potential errors. There are more advanced features to explore, such as handling different NDEF record types.<\/p>\n\n\n\n<p>If you\u2019d like to dive deeper into implementation or access sample code, check out the official <a href=\"https:\/\/github.com\/mobisoftinfotech\/flutter-nfc-tutorial\">GitHub repository<\/a>.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/mobisoftinfotech.com\/contact-us?utm_source=blog_cta&amp;utm_campaign=build-nfc-reader-writer-app-flutter-nfc-manager\"><noscript><img decoding=\"async\" width=\"855\" height=\"363\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/08\/flutter-nfc-tech.png\" alt=\"Build NFC app Flutter with the right tech stack\" class=\"wp-image-42095\" title=\"Build Your NFC App in Flutter\"><\/noscript><img decoding=\"async\" width=\"855\" height=\"363\" src=\"data:image\/svg+xml,%3Csvg%20xmlns%3D%22http%3A%2F%2Fwww.w3.org%2F2000%2Fsvg%22%20viewBox%3D%220%200%20855%20363%22%3E%3C%2Fsvg%3E\" alt=\"Build NFC app Flutter with the right tech stack\" class=\"wp-image-42095 lazyload\" title=\"Build Your NFC App in Flutter\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2025\/08\/flutter-nfc-tech.png\"><\/a><\/figure>\n\n\n<div class=\"modern-author-card\">\n    <div class=\"author-card-content\">\n        <div class=\"author-info-section\">\n            <div class=\"author-avatar\">\n                <noscript><img decoding=\"async\" src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2024\/07\/Gajanan-1.png\" alt=\"Gajanan Garkar\"><\/noscript><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"Gajanan Garkar\" data-src=\"https:\/\/mobisoftinfotech.com\/resources\/wp-content\/uploads\/2024\/07\/Gajanan-1.png\" class=\" lazyload\">\n            <\/div>\n            <div class=\"author-details\">\n                <h3 class=\"author-name\">Gajanan Garkar<\/h3>\n                <p class=\"author-title\">Software Engineer<\/p>\n                <a href=\"javascript:void(0);\" class=\"read-more-link read-more-btn\" onclick=\"toggleAuthorBio(this); return false;\">Read more <noscript><img decoding=\"async\" src=\"\/assets\/images\/blog\/Vector.png\" alt=\"expand\" class=\"read-more-arrow down-arrow\"><\/noscript><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"expand\" class=\"read-more-arrow down-arrow lazyload\" data-src=\"\/assets\/images\/blog\/Vector.png\"><\/a>\n                <div class=\"author-bio-expanded\">\n                    <p>With over 5+ years of experience in developing innovative applications across Android, iOS, Web, Windows, and macOS platforms, I excel in Dart, Java, and Kotlin. My expertise spans the entire development lifecycle, from requirement analysis and technical documentation to coding, testing, and implementation. Skilled in design patterns like GetX, Provider, Bloc, SQLite, MVC, MVVM, and Singleton, I am adept at translating business needs into robust technical solutions. Recognized for my collaborative approach and award-winning performance, I am dedicated to transforming visionary concepts into impactful results.<\/p>\n                    <div class=\"author-social-links\"><div class=\"social-icon\"><a href=\"https:\/\/www.linkedin.com\/in\/gajanan-garkar?utm_source=share&amp;utm_campaign=share_via&amp;utm_content=profile&amp;utm_medium=ios_app\" target=\"_blank\" rel=\"nofollow noopener\"><i class=\"icon-sprite linkedin\"><\/i><\/a><\/div><\/div>\n                    <a href=\"javascript:void(0);\" class=\"read-more-link read-less-btn\" onclick=\"toggleAuthorBio(this); return false;\" style=\"display: none;\">Read less <noscript><img decoding=\"async\" src=\"\/assets\/images\/blog\/Vector.png\" alt=\"collapse\" class=\"read-more-arrow up-arrow\"><\/noscript><img decoding=\"async\" src=\"data:image\/gif;base64,R0lGODlhAQABAIAAAAAAAP\/\/\/yH5BAEAAAAALAAAAAABAAEAAAIBRAA7\" alt=\"collapse\" class=\"read-more-arrow up-arrow lazyload\" 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