diff --git a/example/lib/main.dart b/example/lib/main.dart
index 7775d9b..c4ec1b6 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -7,7 +7,9 @@ void main() {
   runApp(const MyApp());
 }
 
+/// Example app widget for the plugin.
 class MyApp extends StatefulWidget {
+  /// Constructor of MyApp widget.
   const MyApp({Key key}) : super(key: key);
 
   @override
diff --git a/lib/receive_intent.dart b/lib/receive_intent.dart
index 5a88e0d..58e28c5 100644
--- a/lib/receive_intent.dart
+++ b/lib/receive_intent.dart
@@ -3,7 +3,16 @@ import 'dart:convert';
 
 import 'package:flutter/services.dart';
 
+/// Result code indicating that operation succeeded.
+///
+/// Same as [`Activity.RESULT_OK`](https://developer.android.com/reference/android/app/Activity#RESULT_OK)
+/// but for the Dart world.
 const kActivityResultOk = -1;
+
+/// Result code indicating that operation canceled.
+///
+/// Same as [`Activity.RESULT_CANCELED`](https://developer.android.com/reference/android/app/Activity#RESULT_CANCELED)
+/// but for the Dart world.
 const kActivityResultCanceled = 0;
 
 class Intent {