diff --git a/android/build.gradle b/android/build.gradle
index 1683426..01eeda3 100644
--- a/android/build.gradle
+++ b/android/build.gradle
@@ -3,35 +3,25 @@ version '1.0'
 
 buildscript {
     repositories {
-        maven { url 'https://maven.aliyun.com/nexus/content/groups/public/' }
-        maven { url 'https://maven.aliyun.com/nexus/content/repositories/jcenter' }
-        maven { url 'https://maven.aliyun.com/nexus/content/repositories/google' }
-        maven { url 'https://maven.aliyun.com/nexus/content/repositories/gradle-plugin' }
         maven {
             allowInsecureProtocol = true
             url 'http://47.112.160.66:8081/repository/maven-releases'
         }
-//        maven { url 'https://127.0.0.1:8081/repository/maven-releases' }
         google()
         mavenCentral()
     }
 
     dependencies {
-        classpath 'com.android.tools.build:gradle:3.5.1'
+        classpath 'com.android.tools.build:gradle:3.5.4'
     }
 }
 
 rootProject.allprojects {
     repositories {
-        maven { url 'https://maven.aliyun.com/nexus/content/groups/public/' }
-        maven { url 'https://maven.aliyun.com/nexus/content/repositories/jcenter' }
-        maven { url 'https://maven.aliyun.com/nexus/content/repositories/google' }
-        maven { url 'https://maven.aliyun.com/nexus/content/repositories/gradle-plugin' }
         maven {
             allowInsecureProtocol = true
             url 'http://47.112.160.66:8081/repository/maven-releases'
         }
-//        maven { url 'http://127.0.0.1:8081/repository/maven-releases' }
         google()
         mavenCentral()
     }
diff --git a/lib/flutter_openim_sdk.dart b/lib/flutter_openim_sdk.dart
index 88c381f..f11e81b 100644
--- a/lib/flutter_openim_sdk.dart
+++ b/lib/flutter_openim_sdk.dart
@@ -25,7 +25,6 @@ export 'src/manager/im_manager.dart';
 export 'src/manager/im_message_manager.dart';
 export 'src/manager/im_offline_push_manager.dart';
 export 'src/manager/im_signaling_manager.dart';
-export 'src/manager/v2/im_message_manager_v2.dart';
 export 'src/models/conversation_info.dart';
 export 'src/models/group_info.dart';
 export 'src/models/message.dart';
diff --git a/lib/src/manager/im_conversation_manager.dart b/lib/src/manager/im_conversation_manager.dart
index f736742..4ddd1de 100644
--- a/lib/src/manager/im_conversation_manager.dart
+++ b/lib/src/manager/im_conversation_manager.dart
@@ -8,7 +8,6 @@ import 'package:flutter_openim_sdk/flutter_openim_sdk.dart';
 class ConversationManager {
   MethodChannel _channel;
   late ConversationListener conversationListener;
-  var count = 0;
 
   ConversationManager(this._channel);
 
diff --git a/lib/src/manager/im_manager.dart b/lib/src/manager/im_manager.dart
index 80527ae..7a1a183 100644
--- a/lib/src/manager/im_manager.dart
+++ b/lib/src/manager/im_manager.dart
@@ -329,10 +329,10 @@ class IMManager {
       _channel.invokeMethod<int>('getLoginStatus', _buildParam({}));
 
   /// Current user id
-  Future<String?> getLoginUid() => Future.value(uid);
+  Future<String> getLoginUid() async => uid;
 
   /// Current user info
-  Future<UserInfo> getLoginUserInfo() => Future.value(uInfo);
+  Future<UserInfo> getLoginUserInfo() async => uInfo;
 
   /// Modify current user info
   Future<String?> setSelfInfo(
diff --git a/lib/src/manager/v2/im_message_manager_v2.dart b/lib/src/manager/v2/im_message_manager_v2.dart
deleted file mode 100644
index d40f6b5..0000000
--- a/lib/src/manager/v2/im_message_manager_v2.dart
+++ /dev/null
@@ -1,123 +0,0 @@
-import 'dart:convert';
-import 'dart:io';
-
-import 'package:flutter_openim_sdk/flutter_openim_sdk.dart';
-
-extension MessageManagerV2 on MessageManager {
-  Message createTextMessageV2({required String text}) {
-    return _createMessage(contentType: MessageType.text)..content = text;
-  }
-
-  Message createTextAtMessageV2({
-    required String text,
-    required List<String> atUidList,
-  }) {
-    var atElem = AtElem(
-      text: text,
-      atUserList: atUidList,
-      isAtSelf: false,
-    );
-    return _createMessage(contentType: MessageType.at_text)
-      ..forceList = atUidList
-      ..atElem = atElem
-      ..content = jsonEncode(atElem);
-  }
-
-  Message createImageMessageV2({
-    required String imagePath,
-    required String mineType,
-    required int size,
-    required int width,
-    required int height,
-  }) {
-    return _createMessage(contentType: MessageType.picture)
-      ..pictureElem = PictureElem(
-        sourcePath: imagePath,
-        sourcePicture: PictureInfo(
-          type: mineType,
-          size: size,
-          width: width,
-          height: height,
-        ),
-      );
-  }
-
-  Message createSoundMessageV2({
-    required String soundPath,
-    required int duration,
-    required int dataSize,
-  }) {
-    return _createMessage(contentType: MessageType.voice)
-      ..soundElem = SoundElem(
-        soundPath: soundPath,
-        dataSize: dataSize,
-        duration: duration,
-      );
-  }
-
-  Message createVideoMessageV2({
-    required String videoPath,
-    required String videoType,
-    required int videoSize,
-    required int duration,
-    required String snapshotPath,
-    required int snapshotSize,
-    required int snapshotWidth,
-    required int snapshotHeight,
-  }) {
-    return _createMessage(contentType: MessageType.video)
-      ..videoElem = VideoElem(
-        videoPath: videoPath,
-        videoSize: videoSize,
-        videoType: videoType,
-        duration: duration,
-        snapshotPath: snapshotPath,
-        snapshotSize: snapshotSize,
-        snapshotHeight: snapshotHeight,
-        snapshotWidth: snapshotWidth,
-      );
-  }
-
-  Message createFileMessageV2({
-    required String filePath,
-    required String fileName,
-    required int fileSize,
-  }) {
-    return _createMessage(contentType: MessageType.file)
-      ..fileElem = FileElem(
-        fileName: fileName,
-        filePath: filePath,
-        fileSize: fileSize,
-      );
-  }
-
-/*  Message createMergerMessageV2({
-    required List<Message> messageList,
-    required String title,
-    required List<String> summaryList,
-  }) {
-    var message = _createMessage(contentType: MessageType.merger);
-    return message;
-  }
-
-  Message createForwardMessageV2({required List<Message> messageList}) {
-    var message = _createMessage();
-    return message;
-  }*/
-
-  static Message _createMessage({required contentType}) {
-    var now = DateTime.now();
-    return Message(
-      clientMsgID: 'flutter_client_${now.microsecondsSinceEpoch}',
-      createTime: now.millisecond ~/ 1000,
-      sendTime: now.millisecond ~/ 1000,
-      // sessionType: 0,//请求为单人会话1，请求为群聊会话2
-      msgFrom: 100,
-      contentType: contentType,
-      status: MessageStatus.sending,
-      platformID: Platform.isAndroid ? IMPlatform.android : IMPlatform.ios,
-      sendID: OpenIM.iMManager.uid,
-      senderNickName: OpenIM.iMManager.uInfo.name,
-    );
-  }
-}