diff --git a/README.md b/README.md
index 7912cd3..1e0eea2 100644
--- a/README.md
+++ b/README.md
@@ -11,6 +11,7 @@
   * Digital signature
   * Smart poster
   * Connection handover
+  * Android application record
 * Media (MIME data)
   * Bluetooth easy pairing / Bluetooth low energy
   * other MIME data
diff --git a/lib/ndef.dart b/lib/ndef.dart
index e2e1a44..c458dbb 100644
--- a/lib/ndef.dart
+++ b/lib/ndef.dart
@@ -10,14 +10,14 @@ export 'record/signature.dart';
 export 'record/smartposter.dart';
 export 'record/text.dart';
 export 'record/uri.dart';
+export 'record/androidApplication.dart';
 
 import 'dart:typed_data';
 import 'record.dart';
 import 'utilities.dart';
 
 /// Decode raw NDEF messages (containing at least one [NDEFRecord]) from byte array
-List<NDEFRecord> decodeRawNdefMessage(Uint8List data,
-    {var typeFactory = NDEFRecord.defaultTypeFactory}) {
+List<NDEFRecord> decodeRawNdefMessage(Uint8List data, {var typeFactory = NDEFRecord.defaultTypeFactory}) {
   var records = <NDEFRecord>[];
   var stream = new ByteStream(data);
   while (!stream.isEnd()) {
@@ -36,17 +36,14 @@ List<NDEFRecord> decodeRawNdefMessage(Uint8List data,
 
 /// Decode a NDEF record, providing its parts separately.
 /// This is most useful in mobile environment because the APIs will give you these information in a separate manner.
-NDEFRecord decodePartialNdefMessage(
-    TypeNameFormat tnf, Uint8List type, Uint8List payload,
-    {required Uint8List id}) {
+NDEFRecord decodePartialNdefMessage(TypeNameFormat tnf, Uint8List type, Uint8List payload, {required Uint8List? id}) {
   var decoded = NDEFRecord.doDecode(tnf, type, payload, id: id);
   return decoded;
 }
 
 /// Encode an NDEF message (containing several [NDEFRecord]s) to byte array.
 /// Set [canonicalize] to set the MB and ME fields automatically in the first / last record.
-Uint8List encodeNdefMessage(List<NDEFRecord> records,
-    {bool canonicalize = true}) {
+Uint8List encodeNdefMessage(List<NDEFRecord> records, {bool canonicalize = true}) {
   if (records.length == 0) {
     return new Uint8List(0);
   }
diff --git a/lib/record/androidApplication.dart b/lib/record/androidApplication.dart
new file mode 100644
index 0000000..d3b73db
--- /dev/null
+++ b/lib/record/androidApplication.dart
@@ -0,0 +1,34 @@
+import 'dart:convert';
+import 'dart:typed_data';
+
+import 'package:ndef/record/externalRecord.dart';
+
+class AARRecord extends ExternalRecord {
+  static const String classType = "android.com:pkg";
+
+  @override
+  String get decodedType {
+    return AARRecord.classType;
+  }
+
+  String packageName;
+
+  AARRecord(this.packageName);
+
+  @override
+  Uint8List? get payload {
+    return Uint8List.fromList(utf8.encode(packageName));
+  }
+
+  set payload(Uint8List? payload) {
+    packageName = utf8.decode(payload!);
+  }
+
+  @override
+  String toString() {
+    var str = "AARRecord: ";
+    str += basicInfoString;
+    str += "package=$packageName";
+    return str;
+  }
+}
diff --git a/lib/record/externalRecord.dart b/lib/record/externalRecord.dart
new file mode 100644
index 0000000..30753d8
--- /dev/null
+++ b/lib/record/externalRecord.dart
@@ -0,0 +1,26 @@
+import 'dart:typed_data';
+
+import '../ndef.dart';
+
+class ExternalRecord extends NDEFRecord {
+  static const TypeNameFormat classTnf = TypeNameFormat.nfcExternal;
+
+  TypeNameFormat get tnf {
+    return classTnf;
+  }
+
+  ExternalRecord({String? decodedType, Uint8List? payload, Uint8List? id}) : super(id: id, payload: payload) {
+    if (decodedType != null) {
+      this.decodedType = decodedType;
+    }
+  }
+
+  @override
+  String toString() {
+    var str = "ExternalRecord: ";
+    str += basicInfoString;
+    str += "type=$decodedType ";
+    str += "payload=${(payload?.toHexString()) ?? '(null)'}";
+    return str;
+  }
+}