diff --git a/example/lib/main.dart b/example/lib/main.dart
index 6670eb6..1924881 100644
--- a/example/lib/main.dart
+++ b/example/lib/main.dart
@@ -1,7 +1,6 @@
-import 'package:flutter/material.dart';
-import 'dart:async';
+import 'dart:io';
 
-import 'package:flutter/services.dart';
+import 'package:flutter/material.dart';
 import 'package:flutter_openim_sdk/flutter_openim_sdk.dart';
 
 void main() {
@@ -16,6 +15,7 @@ class MyApp extends StatefulWidget {
 class _MyAppState extends State<MyApp> {
   @override
   void initState() {
+    _initSDK();
     super.initState();
   }
 
@@ -28,21 +28,81 @@ class _MyAppState extends State<MyApp> {
         ),
         body: Column(
           children: [
-            TextButton(onPressed: _testApi, child: Text('api')),
+            TextButton(onPressed: _login, child: Text('login')),
           ],
         ),
       ),
     );
   }
 
-  void _testApi() {
-    // FlutterOpenimSdk.iMManager.initSDK(
-    //   platform: platform,
-    //   ipApi: ipApi,
-    //   ipWs: ipWs,
-    //   dbPath: dbPath,
-    //   listener: listener,
-    // );
+  void _login() {
+    if (OpenIM.iMManager.isInitialized)
+      OpenIM.iMManager.login(uid: '', token: '');
+  }
+
+  void _initSDK() async {
+    // Initialize SDK
+    OpenIM.iMManager
+      ..initSDK(
+        platform: Platform.isAndroid ? IMPlatform.android : IMPlatform.ios,
+        ipApi: '',
+        ipWs: '',
+        dbPath: '',
+        listener: OnInitSDKListener(
+          connecting: () {},
+          connectFailed: (code, error) {},
+          connectSuccess: () {},
+          kickedOffline: () {},
+          userSigExpired: () {},
+          selfInfoUpdated: (user) {},
+        ),
+      )
+
+      // Add message listener (remove when not in use)
+      ..messageManager.addAdvancedMsgListener(OnAdvancedMsgListener(
+        recvMessageRevoked: (msgId) {},
+        recvC2CReadReceipt: (list) {},
+        recvNewMessage: (msg) {},
+      ))
+
+      // Set up message sending progress listener
+      ..messageManager.setMsgSendProgressListener(OnMsgSendProgressListener(
+        progressCallback: (msgId, progress) {},
+      ))
+
+      // Set up friend relationship listener
+      ..friendshipManager.setFriendshipListener(OnFriendshipListener(
+        blackListAdd: (u) {},
+        blackListDeleted: (u) {},
+        friendApplicationListAccept: (u) {},
+        friendApplicationListAdded: (u) {},
+        friendApplicationListDeleted: (u) {},
+        friendApplicationListReject: (u) {},
+        friendInfoChanged: (u) {},
+        friendListAdded: (u) {},
+        friendListDeleted: (u) {},
+      ))
+
+      // Set up conversation listener
+      ..conversationManager.setConversationListener(OnConversationListener(
+        conversationChanged: (list) {},
+        newConversation: (list) {},
+        totalUnreadMsgCountChanged: (count) {},
+        syncServerFailed: () {},
+        syncServerFinish: () {},
+        syncServerStart: () {},
+      ))
 
+      // Set up group listener
+      ..groupManager.setGroupListener(OnGroupListener(
+        applicationProcessed: (groupId, opUser, agreeOrReject, opReason) {},
+        groupCreated: (groupId) {},
+        groupInfoChanged: (groupId, info) {},
+        memberEnter: (groupId, list) {},
+        memberInvited: (groupId, opUser, list) {},
+        memberKicked: (groupId, opUser, list) {},
+        memberLeave: (groupId, info) {},
+        receiveJoinApplication: (groupId, info, opReason) {},
+      ));
   }
 }
diff --git a/lib/src/manager/im_manager.dart b/lib/src/manager/im_manager.dart
index f80f072..b8c912e 100644
--- a/lib/src/manager/im_manager.dart
+++ b/lib/src/manager/im_manager.dart
@@ -1,5 +1,4 @@
 import 'dart:convert';
-import 'dart:developer';
 
 import 'package:flutter/services.dart';
 import 'package:flutter_openim_sdk/flutter_openim_sdk.dart';
@@ -15,6 +14,7 @@ class IMManager {
   late InitSDKListener _initSDKListener;
   late String uid;
   late UserInfo uInfo;
+  bool isInitialized = false;
 
   IMManager(this._channel) {
     conversationManager = ConversationManager(_channel);
@@ -277,17 +277,29 @@ class IMManager {
     required InitSDKListener listener,
   }) {
     _initSDKListener = listener;
-    return _channel.invokeMethod(
-      'initSDK',
-      _buildParam(
-        {"platform": platform, "ipApi": ipApi, "ipWs": ipWs, "dbDir": dbPath},
-      ),
-    );
+    return _channel
+        .invokeMethod(
+            'initSDK',
+            _buildParam(
+              {
+                "platform": platform,
+                "ipApi": ipApi,
+                "ipWs": ipWs,
+                "dbDir": dbPath
+              },
+            ))
+        .then((value) {
+      isInitialized = true;
+      return value;
+    });
   }
 
   ///
   Future<dynamic> unInitSDK() {
-    return _channel.invokeMethod('unInitSDK', _buildParam({}));
+    return _channel.invokeMethod('unInitSDK', _buildParam({})).then((value) {
+      isInitialized = false;
+      return value;
+    });
   }
 
   /// login sdk