diff --git a/CHANGELOG.md b/CHANGELOG.md
index 53a71009..bbde3043 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,9 +1,17 @@
 ## NEXT
 
-* 支持gcm推送点击
+## 3.8.3+4
+* 修复消息attribute类型变为bool类型；
+* 修复群组免打扰属性不准；
+* 修复ios importMessages方法bug；
+* 修复群、聊天室禁言时不执行回调的bug；
+* 修复下载方法不执行callback；
+* 构造文件消息提供设置文件大小属性；
+* 修改`EMGroupChangeListener` 为 `EMGroupEventListener`
 
 ## 3.8.3+3
-* 修复安卓下resendMessage方法发送失败时不回调onError。
+* 修复安卓下resendMessage方法发送失败时不回调onError；
+* 修复fetchChatRoomMembers返回类型错误；
 
 ## 3.8.3+2
 * 增加群组已读回执；
diff --git a/README.md b/README.md
index f7beeb96..89ae1bde 100644
--- a/README.md
+++ b/README.md
@@ -28,7 +28,7 @@ Demo中使用的音视频是针对声网音视频封装的[EaseCallKit](https://
 1. 修改 `pubspec.yaml`;
 ```dart
 dependencies:
-  im_flutter_sdk: ^3.8.3+3
+  im_flutter_sdk: ^3.8.3+4
 ```
 
 2. 执行`flutter pub get`;
@@ -1656,25 +1656,18 @@ try{
 #### 更新自己的用户属性
 ```dart
  try {
-     
-      Map aMap = {'nickName': 'gagaga', 'mail': 'xxx@easemob.com'};
-      EMUserInfo updateUserInfo =
-          await EMClient.getInstance.userInfoManager.updateOwnUserInfo(aMap);
-    } on EMError catch (e) {
-      print('操作失败，原因是: $e');
-    }
-```
-#### 更新自己的某一个用户属性
-```dart
-   try {
-      EMUserInfoType infoType = EMUserInfoType.EMUserInfoTypeBirth;
-      String updateValue = '2021.01.01';
-      EMUserInfo updateUserInfo = await EMClient.getInstance.userInfoManager
-          .updateOwnUserInfoWithType(infoType, updateValue);
+    EMUserInfo info = EMUserInfo(EMClient.getInstance.currentUsername);
+    info.copyWith(
+      sign: "修改签名",
+      nickName: "用户属性昵称",
+      mail: "xxx@easemob.com",
+    );
+    await EMClient.getInstance.userInfoManager.updateOwnUserInfo(info);
     } on EMError catch (e) {
       print('操作失败，原因是: $e');
     }
 ```
+
 #### 获取多用户的用户属性
 ```dart
   try {
diff --git a/android/src/main/java/com/easemob/im_flutter_sdk/EMHelper.java b/android/src/main/java/com/easemob/im_flutter_sdk/EMHelper.java
index fca0c3a5..7af0212a 100644
--- a/android/src/main/java/com/easemob/im_flutter_sdk/EMHelper.java
+++ b/android/src/main/java/com/easemob/im_flutter_sdk/EMHelper.java
@@ -526,44 +526,7 @@ static Map<String, Object> toJson(EMMessage message) {
         }
 
         if (message.ext().size() > 0 && null != message.ext()) {
-            HashMap<String, Object> map = new HashMap<>();
-            for (Map.Entry entry:message.ext().entrySet()) {
-                String key = entry.getKey().toString();
-                try {
-                    JSONObject value = message.getJSONObjectAttribute(key);
-                    map.put(key, value);
-                    continue;
-                }
-                catch (HyphenateException e) {
-                }
-                try {
-                    boolean value =  message.getBooleanAttribute(key);
-                    map.put(key, value);
-                    continue;
-                } catch (HyphenateException e) {
-                }
-
-                try {
-                    JSONArray value = message.getJSONArrayAttribute(key);
-                    map.put(key, value);
-                    continue;
-                } catch (HyphenateException e) {
-                }
-                try {
-                    int value = message.getIntAttribute(key);
-                    map.put(key, value);
-                    continue;
-                } catch (HyphenateException e){
-                }
-
-                try {
-                    String value = message.getStringAttribute(key);
-                    map.put(key, value);
-                    continue;
-                } catch (HyphenateException e) {
-                }
-            }
-            data.put("attributes", map);
+            data.put("attributes", message.ext());
         }
         data.put("from", message.getFrom());
         data.put("to", message.getTo());
diff --git a/example/ios/Runner.xcodeproj/project.pbxproj b/example/ios/Runner.xcodeproj/project.pbxproj
index f7c89e5f..eaef0504 100644
--- a/example/ios/Runner.xcodeproj/project.pbxproj
+++ b/example/ios/Runner.xcodeproj/project.pbxproj
@@ -161,7 +161,7 @@
 		97C146E61CF9000F007C117D /* Project object */ = {
 			isa = PBXProject;
 			attributes = {
-				LastUpgradeCheck = 1020;
+				LastUpgradeCheck = 1300;
 				ORGANIZATIONNAME = "";
 				TargetAttributes = {
 					97C146ED1CF9000F007C117D = {
diff --git a/example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme b/example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
index a28140cf..3db53b6e 100644
--- a/example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
+++ b/example/ios/Runner.xcodeproj/xcshareddata/xcschemes/Runner.xcscheme
@@ -1,6 +1,6 @@
 <?xml version="1.0" encoding="UTF-8"?>
 <Scheme
-   LastUpgradeVersion = "1020"
+   LastUpgradeVersion = "1300"
    version = "1.3">
    <BuildAction
       parallelizeBuildables = "YES"
diff --git a/example/lib/pages/account/login_page.dart b/example/lib/pages/account/login_page.dart
index d2f607ab..e5edb155 100644
--- a/example/lib/pages/account/login_page.dart
+++ b/example/lib/pages/account/login_page.dart
@@ -1,5 +1,3 @@
-import 'dart:ui';
-
 import 'package:easeim_flutter_demo/widgets/common_widgets.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_smart_dialog/flutter_smart_dialog.dart';
diff --git a/example/lib/pages/chat/chat_page.dart b/example/lib/pages/chat/chat_page.dart
index 2bd35e8e..6e499991 100644
--- a/example/lib/pages/chat/chat_page.dart
+++ b/example/lib/pages/chat/chat_page.dart
@@ -372,13 +372,6 @@ class _ChatPageState extends State<ChatPage>
   /// 消息长按
   _messageOnLongPress(EMMessage msg) async {
     print('长按消息 $msg');
-    String toAddUsername;
-    String reason;
-    try {
-      EMClient.getInstance.contactManager.addContact(toAddUsername, reason);
-    } on EMError catch (e) {
-      debugPrint(e.toString());
-    }
   }
 
   /// 发送文字消息
diff --git a/example/lib/widgets/wx_expression.dart b/example/lib/widgets/wx_expression.dart
index 7447a3c4..3dcef94d 100644
--- a/example/lib/widgets/wx_expression.dart
+++ b/example/lib/widgets/wx_expression.dart
@@ -1,6 +1,3 @@
-import 'dart:ui';
-
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 
 ///表情组件
diff --git a/ios/Classes/EMChatManagerWrapper.m b/ios/Classes/EMChatManagerWrapper.m
index d42e260c..37fb7d4a 100644
--- a/ios/Classes/EMChatManagerWrapper.m
+++ b/ios/Classes/EMChatManagerWrapper.m
@@ -375,7 +375,7 @@ - (void)importMessages:(NSDictionary *)param
                 result:(FlutterResult)result {
     __weak typeof(self) weakSelf = self;
     NSArray *dictAry = param[@"messages"];
-    NSMutableArray *messages;
+    NSMutableArray *messages = [NSMutableArray array];
     for (NSDictionary *dict in dictAry) {
         [messages addObject:[EMMessage fromJson:dict]];
     }
@@ -395,7 +395,8 @@ - (void)downloadAttachment:(NSDictionary *)param
                     result:(FlutterResult)result {
     __weak typeof(self) weakSelf = self;
     __block EMMessage *msg = [EMMessage fromJson:param[@"message"]];
-    [EMClient.sharedClient.chatManager downloadMessageAttachment:msg
+    EMMessage *needDownMSg = [EMClient.sharedClient.chatManager getMessageWithMessageId:msg.messageId];
+    [EMClient.sharedClient.chatManager downloadMessageAttachment:needDownMSg
                                                         progress:^(int progress)
      {
         [weakSelf.messageChannel invokeMethod:EMMethodKeyOnMessageProgressUpdate
@@ -432,7 +433,8 @@ - (void)downloadThumbnail:(NSDictionary *)param
                    result:(FlutterResult)result {
     __weak typeof(self) weakSelf = self;
     __block EMMessage *msg = [EMMessage fromJson:param[@"message"]];
-    [EMClient.sharedClient.chatManager downloadMessageThumbnail:msg
+    EMMessage *needDownMSg = [EMClient.sharedClient.chatManager getMessageWithMessageId:msg.messageId];
+    [EMClient.sharedClient.chatManager downloadMessageThumbnail:needDownMSg
                                                        progress:^(int progress)
      {
         [weakSelf.messageChannel invokeMethod:EMMethodKeyOnMessageProgressUpdate
@@ -638,6 +640,7 @@ - (void)onConversationRead:(NSString *)from
 - (void)messagesDidReceive:(NSArray *)aMessages {
     NSMutableArray *msgList = [NSMutableArray array];
     for (EMMessage *msg in aMessages) {
+        
         [msgList addObject:[msg toJson]];
     }
     [self.channel invokeMethod:EMMethodKeyOnMessagesReceived
diff --git a/lib/src/em_chat_manager.dart b/lib/src/em_chat_manager.dart
index bd7b0e27..af98f543 100644
--- a/lib/src/em_chat_manager.dart
+++ b/lib/src/em_chat_manager.dart
@@ -2,8 +2,6 @@ import "dart:async";
 
 import 'package:flutter/services.dart';
 import 'package:im_flutter_sdk/im_flutter_sdk.dart';
-import 'models/em_domain_terms.dart';
-import 'em_sdk_method.dart';
 
 class EMChatManager implements EMMessageStatusListener {
   static const _channelPrefix = 'com.easemob.im';
diff --git a/lib/src/em_chat_room_manager.dart b/lib/src/em_chat_room_manager.dart
index 5d7ee5c9..e4cba2f7 100644
--- a/lib/src/em_chat_room_manager.dart
+++ b/lib/src/em_chat_room_manager.dart
@@ -3,9 +3,6 @@ import "dart:async";
 import 'package:flutter/services.dart';
 import 'package:im_flutter_sdk/src/models/em_domain_terms.dart';
 import "em_listeners.dart";
-import 'em_sdk_method.dart';
-import 'package:im_flutter_sdk/src/models/em_cursor_result.dart';
-import 'package:im_flutter_sdk/src/models/em_page_result.dart';
 
 class EMChatRoomManager {
   static const _channelPrefix = 'com.easemob.im';
@@ -65,13 +62,13 @@ class EMChatRoomManager {
           break;
         case EMChatRoomEvent.ON_MUTE_LIST_ADDED:
           String roomId = event['roomId'];
-          List<String> mutes = event['mutes'];
+          List<String> mutes = List.from(event['mutes']);
           String? expireTime = event['expireTime'];
           listener.onMuteListAddedFromChatRoom(roomId, mutes, expireTime);
           break;
         case EMChatRoomEvent.ON_MUTE_LIST_REMOVED:
           String roomId = event['roomId'];
-          List<String> mutes = event['mutes'];
+          List<String> mutes = List.from(event['mutes']);
           listener.onMuteListRemovedFromChatRoom(roomId, mutes);
           break;
         case EMChatRoomEvent.ON_ADMIN_ADDED:
@@ -97,12 +94,12 @@ class EMChatRoomManager {
           break;
         case EMChatRoomEvent.ON_WHITE_LIST_ADDED:
           String roomId = event['roomId'];
-          List<String> members = event["whitelist"];
+          List<String> members = List.from(event["whitelist"]);
           listener.onWhiteListAddedFromChatRoom(roomId, members);
           break;
         case EMChatRoomEvent.ON_WHITE_LIST_REMOVED:
           String roomId = event['roomId'];
-          List<String> members = event["whitelist"];
+          List<String> members = List.from(event["whitelist"]);
           listener.onWhiteListRemovedFromChatRoom(roomId, members);
           break;
         case EMChatRoomEvent.ON_ALL_MEMBER_MUTE_STATE_CHANGED:
diff --git a/lib/src/em_client.dart b/lib/src/em_client.dart
index 2410c206..d36a68f8 100644
--- a/lib/src/em_client.dart
+++ b/lib/src/em_client.dart
@@ -10,10 +10,9 @@ import 'em_userInfo_manager.dart';
 import 'em_group_manager.dart';
 import 'em_listeners.dart';
 import 'em_push_manager.dart';
-import 'em_sdk_method.dart';
 
 import 'models/em_domain_terms.dart';
-import 'models/em_options.dart';
+
 import 'tools/em_log.dart';
 
 class EMClient {
diff --git a/lib/src/em_contact_manager.dart b/lib/src/em_contact_manager.dart
index 96e0831d..15ad21b2 100644
--- a/lib/src/em_contact_manager.dart
+++ b/lib/src/em_contact_manager.dart
@@ -3,10 +3,6 @@ import 'dart:async';
 import 'package:flutter/services.dart';
 import 'package:im_flutter_sdk/im_flutter_sdk.dart';
 
-import 'em_listeners.dart';
-import 'em_sdk_method.dart';
-import 'models/em_domain_terms.dart';
-
 class EMContactManager {
   static const _channelPrefix = 'com.easemob.im';
   static const MethodChannel _channel = const MethodChannel(
diff --git a/lib/src/em_group_manager.dart b/lib/src/em_group_manager.dart
index cd99836e..33f15c1c 100644
--- a/lib/src/em_group_manager.dart
+++ b/lib/src/em_group_manager.dart
@@ -3,11 +3,6 @@ import 'dart:async';
 import 'package:flutter/services.dart';
 import 'package:im_flutter_sdk/im_flutter_sdk.dart';
 
-import 'models/em_domain_terms.dart';
-import 'em_sdk_method.dart';
-//import 'em_domain_terms.dart';
-import 'em_listeners.dart';
-
 class EMGroupManager {
   static const _channelPrefix = 'com.easemob.im';
   static const MethodChannel _channel = const MethodChannel(
@@ -560,12 +555,12 @@ class EMGroupManager {
   }
 
   /// @nodoc addGroupChangeListener - Adds [listener] to be aware of group change events.
-  void addGroupChangeListener(EMGroupChangeListener listener) {
+  void addGroupChangeListener(EMGroupEventListener listener) {
     _groupChangeListeners.add(listener);
   }
 
   /// @nodoc removeGroupChangeListener - Remove [listener] from the listener list.
-  void removeGroupChangeListener(EMGroupChangeListener listener) {
+  void removeGroupChangeListener(EMGroupEventListener listener) {
     if (_groupChangeListeners.contains(listener)) {
       _groupChangeListeners.remove(listener);
     }
@@ -573,7 +568,7 @@ class EMGroupManager {
 
   /// @nodoc
   Future<void> _onGroupChanged(Map? map) async {
-    for (EMGroupChangeListener listener in _groupChangeListeners) {
+    for (EMGroupEventListener listener in _groupChangeListeners) {
       var type = map!['type'];
       switch (type) {
         case EMGroupChangeEvent.ON_INVITATION_RECEIVED:
@@ -638,13 +633,13 @@ class EMGroupManager {
           break;
         case EMGroupChangeEvent.ON_MUTE_LIST_ADDED:
           String groupId = map['groupId'];
-          List<String> mutes = map['mutes'];
+          List<String> mutes = List.from(map['mutes']);
           int? muteExpire = map['muteExpire'];
           listener.onMuteListAddedFromGroup(groupId, mutes, muteExpire);
           break;
         case EMGroupChangeEvent.ON_MUTE_LIST_REMOVED:
           String groupId = map['groupId'];
-          List<String> mutes = map['mutes'];
+          List<String> mutes = List.from(map['mutes']);
           listener.onMuteListRemovedFromGroup(groupId, mutes);
           break;
         case EMGroupChangeEvent.ON_ADMIN_ADDED:
@@ -691,12 +686,12 @@ class EMGroupManager {
           break;
         case EMGroupChangeEvent.ON_WHITE_LIST_ADDED:
           String groupId = map["groupId"];
-          List<String> members = map['whitelist'];
+          List<String> members = List.from(map['whitelist']);
           listener.onWhiteListAddedFromGroup(groupId, members);
           break;
         case EMGroupChangeEvent.ON_WHITE_LIST_REMOVED:
           String groupId = map["groupId"];
-          List<String> members = map['whitelist'];
+          List<String> members = List.from(map['whitelist']);
           listener.onWhiteListRemovedFromGroup(groupId, members);
           break;
         case EMGroupChangeEvent.ON_ALL_MEMBER_MUTE_STATE_CHANGED:
diff --git a/lib/src/em_listeners.dart b/lib/src/em_listeners.dart
index b0140e5f..db97ca63 100644
--- a/lib/src/em_listeners.dart
+++ b/lib/src/em_listeners.dart
@@ -11,11 +11,18 @@ abstract class EMConnectionListener {
 /// @nodoc
 abstract class EMMultiDeviceListener {
   /// @nodoc
-  void onContactEvent(EMContactGroupEvent? event, String? target, String? ext);
+  void onContactEvent(
+    EMContactGroupEvent? event,
+    String? target,
+    String? ext,
+  );
 
   /// @nodoc
   void onGroupEvent(
-      EMContactGroupEvent? event, String? target, List<String>? usernames);
+    EMContactGroupEvent? event,
+    String? target,
+    List<String>? usernames,
+  );
 }
 
 abstract class EMCustomListener {
@@ -164,6 +171,7 @@ class EMGroupChangeEvent {
       "onAllMemberMuteStateChanged";
 }
 
+@Deprecated('Use EMGroupEventListener.')
 abstract class EMGroupChangeListener {
   /// id是[groupId], 名称是[groupName]的群邀请被[inviter]拒绝,理由是[reason]
   void onInvitationReceivedFromGroup(
@@ -240,3 +248,80 @@ abstract class EMGroupChangeListener {
   /// 群组禁言状态发生变化
   void onAllGroupMemberMuteStateChanged(String groupId, bool isAllMuted);
 }
+
+abstract class EMGroupEventListener {
+  /// id是[groupId], 名称是[groupName]的群邀请被[inviter]拒绝,理由是[reason]
+  void onInvitationReceivedFromGroup(
+      String groupId, String? groupName, String inviter, String? reason);
+
+  /// 收到用户[applicant]申请加入id是[groupId], 名称是[groupName]的群，原因是[reason]
+  void onRequestToJoinReceivedFromGroup(
+      String groupId, String? groupName, String applicant, String? reason);
+
+  /// 入群申请被同意
+  void onRequestToJoinAcceptedFromGroup(
+      String groupId, String? groupName, String accepter);
+
+  /// 入群申请被拒绝
+  void onRequestToJoinDeclinedFromGroup(
+      String groupId, String? groupName, String decliner, String? reason);
+
+  /// 入群邀请被同意
+  void onInvitationAcceptedFromGroup(
+      String groupId, String invitee, String? reason);
+
+  /// 入群邀请被拒绝
+  void onInvitationDeclinedFromGroup(
+      String groupId, String invitee, String? reason);
+
+  /// 被移出群组
+  void onUserRemovedFromGroup(String groupId, String? groupName);
+
+  /// 群组解散
+  void onGroupDestroyed(String groupId, String? groupName);
+
+  /// @nodoc 自动同意加群
+  void onAutoAcceptInvitationFromGroup(
+      String groupId, String inviter, String? inviteMessage);
+
+  /// 群禁言列表增加
+  void onMuteListAddedFromGroup(
+      String groupId, List<String> mutes, int? muteExpire);
+
+  /// 群禁言列表减少
+  void onMuteListRemovedFromGroup(String groupId, List<String> mutes);
+
+  /// 群管理增加
+  void onAdminAddedFromGroup(String groupId, String admin);
+
+  /// 群管理被移除
+  void onAdminRemovedFromGroup(String groupId, String admin);
+
+  /// 群所有者变更
+  void onOwnerChangedFromGroup(
+      String groupId, String newOwner, String oldOwner);
+
+  /// 有用户加入群
+  void onMemberJoinedFromGroup(String groupId, String member);
+
+  /// 有用户离开群
+  void onMemberExitedFromGroup(String groupId, String member);
+
+  /// 群公告变更
+  void onAnnouncementChangedFromGroup(String groupId, String announcement);
+
+  /// 群共享文件增加
+  void onSharedFileAddedFromGroup(String groupId, EMGroupSharedFile sharedFile);
+
+  /// 群共享文件被删除
+  void onSharedFileDeletedFromGroup(String groupId, String fileId);
+
+  /// 有用户被添加到群组白名单
+  void onWhiteListAddedFromGroup(String groupId, List<String> members);
+
+  /// 有用户从群组白名单被移除
+  void onWhiteListRemovedFromGroup(String groupId, List<String> members);
+
+  /// 群组禁言状态发生变化
+  void onAllGroupMemberMuteStateChanged(String groupId, bool isAllMuted);
+}
diff --git a/lib/src/em_push_manager.dart b/lib/src/em_push_manager.dart
index b142fc54..119b3363 100644
--- a/lib/src/em_push_manager.dart
+++ b/lib/src/em_push_manager.dart
@@ -2,7 +2,6 @@ import 'dart:io';
 
 import 'package:flutter/services.dart';
 
-import 'em_sdk_method.dart';
 import 'models/em_domain_terms.dart';
 
 class EMPushManager {
diff --git a/lib/src/em_userInfo_manager.dart b/lib/src/em_userInfo_manager.dart
index 40cc7aba..f7014edf 100644
--- a/lib/src/em_userInfo_manager.dart
+++ b/lib/src/em_userInfo_manager.dart
@@ -1,8 +1,6 @@
 import 'dart:async';
 import 'package:flutter/services.dart';
 import 'package:im_flutter_sdk/im_flutter_sdk.dart';
-import 'em_sdk_method.dart';
-import 'models/em_userInfo.dart';
 
 class EMUserInfoManager {
   static const _channelPrefix = 'com.easemob.im';
diff --git a/lib/src/models/em_conversation.dart b/lib/src/models/em_conversation.dart
index 011bb1e4..c7d4d3a8 100644
--- a/lib/src/models/em_conversation.dart
+++ b/lib/src/models/em_conversation.dart
@@ -1,10 +1,6 @@
 import 'dart:core';
 import 'package:flutter/services.dart';
 import 'package:im_flutter_sdk/im_flutter_sdk.dart';
-import 'package:im_flutter_sdk/src/models/em_error.dart';
-import 'package:im_flutter_sdk/src/models/em_message.dart';
-
-import '../em_sdk_method.dart';
 
 enum EMConversationType {
   Chat, // 单聊消息
diff --git a/lib/src/models/em_message.dart b/lib/src/models/em_message.dart
index 88a8a271..a4fb55ea 100644
--- a/lib/src/models/em_message.dart
+++ b/lib/src/models/em_message.dart
@@ -2,7 +2,6 @@ import 'dart:math';
 
 import 'package:flutter/services.dart';
 import 'package:im_flutter_sdk/im_flutter_sdk.dart';
-import 'package:im_flutter_sdk/src/em_sdk_method.dart';
 
 // 消息类型
 enum EMMessageChatType {
@@ -99,9 +98,7 @@ class MessageCallBackManager {
   }
 
   addMessage(EMMessage message) {
-    if (message.status != EMMessageStatus.SUCCESS) {
-      cacheMessageMap[message.localTime.toString()] = message;
-    }
+    cacheMessageMap[message.localTime.toString()] = message;
   }
 
   removeMessage(EMMessage message) {
@@ -213,10 +210,12 @@ class EMMessage {
     required String username,
     required String filePath,
     String displayName = '',
+    int? fileSize,
   }) : this.createSendMessage(
             to: username,
             body: EMFileMessageBody(
               localPath: filePath,
+              fileSize: fileSize,
               displayName: displayName,
             ));
 
@@ -227,6 +226,7 @@ class EMMessage {
     String displayName = '',
     String thumbnailLocalPath = '',
     bool sendOriginalImage = false,
+    int? fileSize,
     double width = 0,
     double height = 0,
   }) : this.createSendMessage(
@@ -246,6 +246,7 @@ class EMMessage {
     required String filePath,
     String displayName = '',
     int duration = 0,
+    int? fileSize,
     String thumbnailLocalPath = '',
     double width = 0,
     double height = 0,
@@ -255,6 +256,7 @@ class EMMessage {
               localPath: filePath,
               displayName: displayName,
               duration: duration,
+              fileSize: fileSize,
               thumbnailLocalPath: thumbnailLocalPath,
               width: width,
               height: height,
@@ -265,12 +267,14 @@ class EMMessage {
     required String username,
     required String filePath,
     int duration = 0,
+    int? fileSize,
     String displayName = '',
   }) : this.createSendMessage(
             to: username,
             body: EMVoiceMessageBody(
                 localPath: filePath,
                 duration: duration,
+                fileSize: fileSize,
                 displayName: displayName));
 
   /// 构造发送的位置消息
@@ -584,8 +588,11 @@ class EMFileMessageBody extends EMMessageBody {
   EMFileMessageBody({
     this.localPath,
     this.displayName,
+    int? fileSize,
     EMMessageBodyType type = EMMessageBodyType.FILE,
-  }) : super(type: type);
+  }) : super(type: type) {
+    this.fileSize = fileSize ?? 0;
+  }
 
   EMFileMessageBody.fromJson(
       {required Map map, EMMessageBodyType type = EMMessageBodyType.FILE})
@@ -664,11 +671,13 @@ class EMImageMessageBody extends EMFileMessageBody {
     String? displayName,
     this.thumbnailLocalPath,
     this.sendOriginalImage,
+    int? fileSize,
     this.width,
     this.height,
   }) : super(
           localPath: localPath,
           displayName: displayName,
+          fileSize: fileSize,
           type: EMMessageBodyType.IMAGE,
         );
 
@@ -727,12 +736,14 @@ class EMVideoMessageBody extends EMFileMessageBody {
     String? localPath,
     String? displayName,
     this.duration,
+    int? fileSize,
     this.thumbnailLocalPath,
     this.height,
     this.width,
   }) : super(
           localPath: localPath,
           displayName: displayName,
+          fileSize: fileSize,
           type: EMMessageBodyType.VIDEO,
         );
 
@@ -790,10 +801,12 @@ class EMVoiceMessageBody extends EMFileMessageBody {
   EMVoiceMessageBody({
     localPath,
     String? displayName,
+    int? fileSize,
     this.duration,
   }) : super(
           localPath: localPath,
           displayName: displayName,
+          fileSize: fileSize,
           type: EMMessageBodyType.VOICE,
         );
 
@@ -854,7 +867,10 @@ class EMCustomMessageBody extends EMMessageBody {
   Map<String, dynamic> toJson() {
     final Map<String, dynamic> data = super.toJson();
     data['event'] = event;
-    data['params'] = params;
+    if (params != null) {
+      data['params'] = params;
+    }
+
     return data;
   }
 
diff --git a/lib/src/models/em_push_config.dart b/lib/src/models/em_push_config.dart
index 271f71b4..e622b528 100644
--- a/lib/src/models/em_push_config.dart
+++ b/lib/src/models/em_push_config.dart
@@ -1,7 +1,6 @@
 import 'package:flutter/services.dart';
 
 import '../tools/em_log.dart';
-import '../tools/em_extension.dart';
 
 import 'em_domain_terms.dart';
 
diff --git a/lib/src/models/em_userInfo.dart b/lib/src/models/em_userInfo.dart
index 3cd62e65..441fb9f5 100644
--- a/lib/src/models/em_userInfo.dart
+++ b/lib/src/models/em_userInfo.dart
@@ -14,43 +14,99 @@ enum EMUserInfoType {
 class EMUserInfo {
   EMUserInfo(String aUserId);
 
+  EMUserInfo._private({
+    required this.userId,
+    this.nickName,
+    this.avatarUrl,
+    this.mail,
+    this.phone,
+    this.gender,
+    this.sign,
+    this.birth,
+    this.ext,
+  });
+
   factory EMUserInfo.fromJson(Map map) {
-    EMUserInfo info = EMUserInfo.private(map['userId']);
+    EMUserInfo info = EMUserInfo._private(
+      userId: map['userId'],
+    );
     info.nickName = map['nickName'];
     info.avatarUrl = map['avatarUrl'];
     info.mail = map['mail'];
     info.phone = map['phone'];
-    info.gender = map['gender'];
+    if (map.containsKey("gender")) {
+      if (map['gender'] as int != 0) {
+        info.gender = map['gender'] as int;
+      }
+    }
     info.sign = map['sign'];
     info.birth = map['birth'];
     info.ext = map['ext'];
     return info;
   }
 
+  EMUserInfo copyWith({
+    String? nickName,
+    String? avatarUrl,
+    String? mail,
+    String? phone,
+    int? gender,
+    String? sign,
+    String? birth,
+    String? ext,
+  }) {
+    return EMUserInfo._private(
+      userId: this.userId,
+      nickName: nickName ?? this.nickName,
+      avatarUrl: avatarUrl ?? this.avatarUrl,
+      mail: mail ?? this.mail,
+      phone: phone ?? this.phone,
+      gender: gender ?? this.gender,
+      sign: sign ?? this.sign,
+      birth: birth ?? this.birth,
+      ext: ext ?? this.birth,
+    );
+  }
+
   Map toJson() {
     Map data = Map();
     data['userId'] = userId;
-    data['nickName'] = nickName;
-    data['avatarUrl'] = avatarUrl;
-    data['mail'] = mail;
-    data['phone'] = phone;
-    data['gender'] = gender;
-    data['sign'] = sign;
-    data['birth'] = birth;
-    data['ext'] = ext;
+    if (nickName != null) {
+      data['nickName'] = nickName;
+    }
+    if (avatarUrl != null) {
+      data['avatarUrl'] = avatarUrl;
+    }
+    if (mail != null) {
+      data['mail'] = mail;
+    }
+    if (phone != null) {
+      data['phone'] = phone;
+    }
+    if (gender != null) {
+      data['gender'] = gender;
+    }
+    if (sign != null) {
+      data['sign'] = sign;
+    }
+    if (birth != null) {
+      data['birth'] = birth;
+    }
+    if (ext != null) {
+      data['ext'] = ext;
+    }
+
     return data;
   }
 
-  EMUserInfo.private(this.userId);
-
   String userId = '';
-  String? nickName = '';
-  String? avatarUrl = '';
-  String? mail = '';
-  String? phone = '';
-  int? gender = 0;
-  String? sign = '';
-  String? birth = '';
-  String? ext = '';
+  String? nickName;
+  String? avatarUrl;
+  String? mail;
+  String? phone;
+  int? gender;
+  String? sign;
+  String? birth;
+  String? ext;
   int expireTime = DateTime.now().millisecondsSinceEpoch;
 }
diff --git a/lib/src/tools/em_extension.dart b/lib/src/tools/em_extension.dart
index 8ddaeed1..1ac2d527 100644
--- a/lib/src/tools/em_extension.dart
+++ b/lib/src/tools/em_extension.dart
@@ -8,6 +8,8 @@ extension MapExtension on Map {
       return this[key] == 0 ? false : true;
     } else if (this[key] is String) {
       return this[key].toString().length == 0 ? false : true;
+    } else if (this[key] is bool) {
+      return this[key];
     } else {
       return false;
     }
diff --git a/pubspec.yaml b/pubspec.yaml
index 981f7db7..c3292cd2 100644
--- a/pubspec.yaml
+++ b/pubspec.yaml
@@ -1,6 +1,6 @@
 name: im_flutter_sdk
 description: Easemob IM flutter SDK.
-version: 3.8.3+3
+version: 3.8.3+4
 homepage: http://www.easemob.com/product/im
 
 environment: