TencentIMSDK.AddRecvNewMsgCallback((List<Message> messages, string user_data)=>{
  foreach(Message message in messages)
  {
    foreach (Elem elem in message.message_elem_array)
    {
      // 有下一个消息
      if (elem.elem_type == TIMElemType.kTIMElem_Text)
      {
         string text = elem.text_elem_content;
      }
    }
  }
})

TencentIMSDK.AddRecvNewMsgCallback((List<Message> messages, string user_data)=>{
  foreach(Message message in messages)
  {
    foreach (Elem elem in message.message_elem_array)
    {
      // 有下一个消息
      if (elem.elem_type == TIMElemType.kTIMElem_Custom)
      {
         string data = elem.custom_elem_data;
         string desc = elem.custom_elem_desc;
         string ext = elem.custom_elem_ext;
      }
    }
  }
})

TencentIMSDK.AddRecvNewMsgCallback((List<Message> messages, string user_data)=>{
  foreach(Message message in messages)
  {
    foreach (Elem elem in message.message_elem_array)
    {
      // 有下一个消息
      if (elem.elem_type == TIMElemType.kTIMElem_Image)
      {
         string path = elem.image_elem_orig_path; // 图片上传时的路径，消息发送者才会有这个字段，消息发送者可用这个字段将图片预先上屏，优化上屏体验。
         switch(elem.image_elem_level)
         {
          case TIMImageLevel.kTIMImageLevel_Orig: // 原图发送
          {
            string id = elem.image_elem_orig_id;
            int h = elem.image_elem_orig_pic_height;
            int w = elem.image_elem_orig_pic_width;
            int size = elem.image_elem_orig_pic_size;
            string url = elem.image_elem_orig_url;
            break;
          }
          case TIMImageLevel.kTIMImageLevel_HD: // 高清图发送(图片较大)
          {
            string id = elem.image_elem_large_id;
            int h = elem.image_elem_large_pic_height;
            int w = elem.image_elem_large_pic_width;
            int size = elem.image_elem_large_pic_size;
            string url = elem.image_elem_large_url;
            break;
          }
          case TIMImageLevel.kTIMImageLevel_Compression: // 高压缩率图发送(图片较小,默认值)
          {
            string id = elem.image_elem_thumb_id;
            int h = elem.image_elem_orig_thumb_height;
            int w = elem.image_elem_orig_thumb_width;
            int size = elem.image_elem_orig_thumb_size;
            string url = elem.image_elem_thumb_url;
            break;
          }
         }
      }
    }
  }
})

TencentIMSDK.AddRecvNewMsgCallback((List<Message> messages, string user_data)=>{
  foreach(Message message in messages)
  {
    foreach (Elem elem in message.message_elem_array)
    {
      // 有下一个消息
      if (elem.elem_type == TIMElemType.kTIMElem_Video)
      {
       // 解析视频消息属性，封面、播放地址、宽高、大小等。
       string type = elem.video_elem_video_type;
       int size = elem.video_elem_video_size;
       int duration = elem.video_elem_video_duration;
       string path = elem.video_elem_video_path;
       string url = elem.video_elem_video_url;
       int imageType = elem.video_elem_image_type;
       int imageSize = elem.video_elem_image_size;
       int w = elem.video_elem_image_width;
       int h = elem.video_elem_image_height;
       string imagePath = elem.video_elem_image_path;
       string url = elem.video_elem_image_url;
      }
    }
  }
})

TencentIMSDK.AddRecvNewMsgCallback((List<Message> messages, string user_data)=>{
  foreach(Message message in messages)
  {
    foreach (Elem elem in message.message_elem_array)
    {
      // 有下一个消息
      if (elem.elem_type == TIMElemType.kTIMElem_Sound)
      {
       // 解析语音消息 播放地址，本地地址，大小，时长等。
       int size = elem.sound_elem_file_size;
       int duration = elem.sound_elem_file_time;
       string path = elem.sound_elem_file_path;
       string url = elem.sound_elem_url;
      }
    }
  }
})

TencentIMSDK.AddRecvNewMsgCallback((List<Message> messages, string user_data)=>{
  foreach(Message message in messages)
  {
    foreach (Elem elem in message.message_elem_array)
    {
      // 有下一个消息
      if (elem.elem_type == TIMElemType.kTIMElem_File)
      {
       // 解析文件消息 文件名、文件大小、url等。
       int size = elem.file_elem_file_size;
       string path = elem.file_elem_file_path;
       string name = elem.file_elem_file_name;
       string url = elem.file_elem_url;
      }
    }
  }
})

TencentIMSDK.AddRecvNewMsgCallback((List<Message> messages, string user_data)=>{
  foreach(Message message in messages)
  {
    foreach (Elem elem in message.message_elem_array)
    {
      // 有下一个消息
      if (elem.elem_type == TIMElemType.kTIMElem_Location)
      {
       // 解析地理位置消息，经纬度、描述等。
       double longitude = elem.location_elem_longitude;
       double latitude = elem.location_elem_latitude;
       string desc = elem.location_elem_desc;
      }
    }
  }
})

TencentIMSDK.AddRecvNewMsgCallback((List<Message> messages, string user_data)=>{
  foreach(Message message in messages)
  {
    foreach (Elem elem in message.message_elem_array)
    {
      // 有下一个消息
      if (elem.elem_type == TIMElemType.kTIMElem_Face)
      {
       string data = elem.face_elem_buf;
       int index = elem.face_elem_index;
      }
    }
  }
})

if(tip.group_tips_elem_tip_type == TIMGroupTipType.kTIMGroupTip_GroupInfoChange){
        tip.group_tips_elem_group_id; // 所属群组
        message.group_tips_elem_tip_type; // 群Tips类型
        message.group_tips_elem_op_user_info; // 操作人资料
        message.group_tips_elem_changed_user_info_array; // 被操作人资料
        message.group_tips_elem_group_change_info_array; // 群信息变更详情
        message.group_tips_elem_member_change_info_array; // 群成员变更信息
}

TencentIMSDK.SetMsgElemUploadProgressCallback((Message message, int index, int cur_size, int total_size, string user_data)=>{
    // message 当前正在发送的消息实例
  // index 当前正在上传的文件序号
  // cur_size 当前正在上传的文件大小MB
  // total_size 当前正在上传的文件总大小
})

foreach (Elem elem in message.message_elem_array) {
   // 有下一个消息
}