Fix runtime release platform issue (#399)

Author: trunghieuvn

packages/desktop_drop/example/lib/main.dart

@@ -6,6 +6,7 @@ import 'package:desktop_drop/desktop_drop.dart';
 import 'package:flutter/foundation.dart';
 import 'package:flutter/material.dart';
 import 'package:shared_preferences/shared_preferences.dart';
+import 'package:universal_platform/universal_platform.dart';
 
 void main() {
   runApp(const MyApp());
@@ -75,7 +76,7 @@ class MyApp extends StatelessWidget {
             const ExampleDragTarget(),
             const ExampleDragTarget(),
             const ExampleDragTarget(),
-            if (Platform.isMacOS)
+            if (UniversalPlatform.isMacOS)
               StatefulBuilder(builder: (context, setState) {
                 return Column(
                   children: [
@@ -186,7 +187,7 @@ class _ExampleDragTargetState extends State<ExampleDragTarget> {
                   style: Theme.of(context).textTheme.bodySmall,
                 ),
               ),
-            if (_list.isNotEmpty && Platform.isMacOS)
+            if (_list.isNotEmpty && UniversalPlatform.isMacOS)
               Align(
                 alignment: Alignment.bottomRight,
                 child: TextButton(

packages/desktop_drop/example/pubspec.lock

@@ -324,6 +324,14 @@ packages:
       url: "https://pub.dev"
     source: hosted
     version: "0.7.4"
+  universal_platform:
+    dependency: "direct main"
+    description:
+      name: universal_platform
+      sha256: "64e16458a0ea9b99260ceb5467a214c1f298d647c659af1bff6d3bf82536b1ec"
+      url: "https://pub.dev"
+    source: hosted
+    version: "1.1.0"
   vector_math:
     dependency: transitive
     description:

packages/desktop_drop/example/pubspec.yaml

@@ -19,6 +19,7 @@ dependencies:
   cross_file: ^0.3.2
   cupertino_icons: ^1.0.2
   shared_preferences: ^2.2.3 
+  universal_platform:
 
 dev_dependencies:
   flutter_test:

packages/desktop_drop/lib/src/channel.dart

@@ -3,6 +3,7 @@ import 'dart:convert';
 import 'package:desktop_drop/src/drop_item.dart';
 import 'package:flutter/services.dart';
 import 'package:flutter/widgets.dart';
+import 'package:universal_platform/universal_platform.dart';
 
 import 'events.dart';
 import 'utils/platform.dart'
@@ -65,7 +66,7 @@ class DesktopDrop {
         _notifyEvent(DropEnterEvent(location: _offset!));
         break;
       case "updated":
-        if (_offset == null && Platform.isLinux) {
+        if (_offset == null && UniversalPlatform.isLinux) {
           final position = (call.arguments as List).cast<double>();
           _offset = Offset(position[0], position[1]);
           _notifyEvent(DropEnterEvent(location: _offset!));

packages/desktop_drop/lib/src/drop_target.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/widgets.dart';
+import 'package:universal_platform/universal_platform.dart';
 
 import 'channel.dart';
 import 'drop_item.dart';
@@ -155,7 +156,7 @@ class _DropTargetState extends State<DropTarget> {
         localLocation: position,
       );
     } else if (event is DropDoneEvent &&
-        (_status != _DragTargetStatus.idle || Platform.isLinux) &&
+        (_status != _DragTargetStatus.idle || UniversalPlatform.isLinux) &&
         inBounds) {
       _updateStatus(
         _DragTargetStatus.idle,
@@ -211,7 +212,7 @@ class _DropTargetState extends State<DropTarget> {
 }
 
 Offset _scaleHoverPoint(BuildContext context, Offset point) {
-  if (Platform.isWindows || Platform.isAndroid) {
+  if (UniversalPlatform.isWindows || UniversalPlatform.isAndroid) {
     return point.scale(
       1 / MediaQuery.of(context).devicePixelRatio,
       1 / MediaQuery.of(context).devicePixelRatio,

packages/desktop_drop/lib/src/utils/platform.dart

@@ -1,11 +1,11 @@
-import 'dart:io' as io;
+import 'package:universal_platform/universal_platform.dart';
 
 class Platform {
-  static bool get isLinux => io.Platform.isLinux;
+  static bool get isLinux => UniversalPlatform.isLinux;
 
-  static bool get isWindows => io.Platform.isWindows;
+  static bool get isWindows => UniversalPlatform.isWindows;
 
-  static bool get isWeb => false;
+  static bool get isWeb => UniversalPlatform.isWeb;
 
-  static bool get isAndroid => io.Platform.isAndroid;
+  static bool get isAndroid => UniversalPlatform.isAndroid;
 }

packages/desktop_drop/pubspec.yaml

@@ -1,6 +1,6 @@
 name: desktop_drop
 description: A plugin which allows user dragging files to your flutter desktop applications.
-version: 0.5.0
+version: 0.5.1
 homepage: https://github.com/MixinNetwork/flutter-plugins/tree/main/packages/desktop_drop
 
 environment:
@@ -14,6 +14,7 @@ dependencies:
     sdk: flutter
   cross_file: ^0.3.4+2
   web: ^1.1.1
+  universal_platform: ^1.1.0
 
 dev_dependencies:
   flutter_test: