更新

example/lib/main.dart

 import 'package:flutter/material.dart';
-import 'dart:async';
-
-import 'package:flutter/services.dart';
 import 'package:jd_sdk/jdsdk.dart';
 
 void main() => runApp(MyApp());

lib/jdsdk.dart

@@ -11,8 +11,8 @@ class Jdsdk {
   /// [appSecret]     app密钥
   ///
   static Future<Map<String,dynamic>> init({@required String appKey, @required String appSecret}) async {
-    final Map<String,dynamic> version = await _channel.invokeMethod('init', {"appKey": appKey, "appSecret": appSecret});
-    return version;
+    final Map<dynamic,dynamic> version = await _channel.invokeMethod('init', {"appKey": appKey, "appSecret": appSecret});
+    return Map<String,dynamic>.from(version);
   }
 
   ///