flutter_nfc_kit

Flutter NFC Kit

Yet another plugin to provide NFC functionality on Android, iOS and browsers (by WebUSB, see below).

This plugin's functionalities include:

• read metadata and read & write NDEF records of tags / cards complying with:
  • ISO 14443 Type A & Type B (NFC-A / NFC-B / MIFARE Classic / MIFARE Plus / MIFARE Ultralight / MIFARE DESFire)
  • ISO 18092 (NFC-F / FeliCa)
  • ISO 15693 (NFC-V)
• R/W block / page / sector level data of tags complying with:
  • MIFARE Classic / Ultralight (Android only, MIFARE Classic Read & Write block for iOS)
  • ISO 15693 (iOS only)
• transceive raw commands with tags / cards complying with:
  • ISO 7816 Smart Cards (layer 4, in APDUs)
  • other device-supported technologies (layer 3, in raw commands, see documentation for platform-specific supportability)

Note that due to API limitations, not all operations are supported on all platforms. You are welcome to submit PRs to add support for any standard-specific operations.

This library uses ndef for NDEF record encoding & decoding.

Contributing

Please refer to CONTRIBUTING.md for more information.

Setup

Android

We have the following minimum version requirements for Android plugin:

• Java 17
• Gradle 8.9
• Android SDK 24 (you must set corresponding jvmTarget in you app's build.gradle)
• Android Gradle Plugin 8.7

To use this plugin on Android, you also need to:

• Add android.permission.NFC to your AndroidManifest.xml.

iOS

This plugin now supports Swift package manager, and requires iOS 13+.

• Add Near Field Communication Tag Reader Session Formats Entitlements to your entitlements.
• Add NFCReaderUsageDescription to your Info.plist.
• Add com.apple.developer.nfc.readersession.felica.systemcodes and com.apple.developer.nfc.readersession.iso7816.select-identifiers to your Info.plist as needed. WARNING: for iOS 14.5 and earlier versions, you MUST add them before invoking poll with readIso18092 or readIso15693 enabled, or your NFC WILL BE TOTALLY UNAVAILABLE BEFORE REBOOT due to a CoreNFC bug.
• Open Runner.xcworkspace with Xcode and navigate to project settings then the tab Signing & Capabilities.
• Select the Runner in targets in left sidebar then press the "+ Capability" in the left upper corner and choose Near Field Communication Tag Reading.

Web

The web version of this plugin does not actually support NFC in browsers, but uses a specific WebUSB protocol, so that Flutter programs can communicate with dual-interface (NFC / USB) devices in a platform-independent way.

Make sure you understand the statement above and the protocol before using this plugin.

Usage

We provide simple code example and a example application.

Refer to the documentation for more information.

Error codes

We use error codes with similar meaning as HTTP status code. Brief explanation and error cause in string (if available) will also be returned when an error occurs.

Operation Mode

We provide two operation modes: polling (default) and event streaming. Both can give the same NFCTag object. Please see example for more details.

Performance Optimization (Android)

For Android applications, you can optimize NFC tag detection performance using the androidReaderModeFlags parameter:

// Skip automatic NDEF discovery for ~500ms faster detection
// and disable platform sounds for custom feedback
const flags = 0x80 | 0x100; // FLAG_READER_SKIP_NDEF_CHECK | FLAG_READER_NO_PLATFORM_SOUNDS

final tag = await FlutterNfcKit.poll(
  androidReaderModeFlags: flags,
);

Common flags from NfcAdapter:

• 0x80 - FLAG_READER_SKIP_NDEF_CHECK: Skip automatic NDEF discovery, improving detection speed by ~500ms
• 0x100 - FLAG_READER_NO_PLATFORM_SOUNDS: Disable system beep/vibration for custom audio/haptic feedback

These flags are particularly useful for applications that:

• Need fast tag detection (e.g., access control, fast payments)
• Implement custom user feedback instead of system sounds
• Use custom NDEF reading logic instead of automatic discovery