feat: return empty tag stream on non-Android device

Signed-off-by: Harry Chen <[email protected]>

Author: Harry-Chen

lib/flutter_nfc_kit.dart

@@ -7,6 +7,7 @@ import 'package:ndef/ndef.dart' as ndef;
 import 'package:ndef/ndef.dart' show TypeNameFormat; // for generated file
 import 'package:ndef/utilities.dart';
 import 'package:json_annotation/json_annotation.dart';
+import 'package:universal_platform/universal_platform.dart';
 
 part 'flutter_nfc_kit.g.dart';
 
@@ -277,14 +278,17 @@ class FlutterNfcKit {
 
   static const MethodChannel _channel = MethodChannel('flutter_nfc_kit/method');
 
-  static const EventChannel _tagEventChannel =
+  static final EventChannel _tagEventChannel =
       EventChannel('flutter_nfc_kit/event');
 
   /// Stream of NFC tag events. Each event is a [NFCTag] object.
   ///
   /// This is only supported on Android.
   /// On other platforms, this stream will always be empty.
   static Stream<NFCTag> get tagStream {
+    if (!UniversalPlatform.isAndroid) {
+      return const Stream<NFCTag>.empty();
+    }
     return _tagEventChannel.receiveBroadcastStream().map((dynamic event) {
       final Map<String, dynamic> json = jsonDecode(event as String);
       return NFCTag.fromJson(json);

pubspec.yaml

@@ -1,6 +1,6 @@
 name: flutter_nfc_kit
 description: Provide NFC functionality on Android, iOS & Web, including reading metadata, read & write NDEF records, and transceive layer 3 & 4 data with NFC tags / cards
-version: 3.6.0
+version: 3.6.1
 homepage: "https://github.com/nfcim/flutter_nfc_kit"
 
 environment:
@@ -17,6 +17,7 @@ dependencies:
   convert: ^3.1.1
   logging: ^1.2.0
   web: ^1.1.1
+  universal_platform: ^1.1.0
 
 dev_dependencies:
   flutter_test: