2. The method according to claim 1 , wherein the step A specifically comprises: A1: parsing an original MMS data packet and acquiring all the files in the original MMS data packet; every time a file is acquired, determining a format of the file by checking a content-type field of the file and saving the file into a file body of a corresponding format; A2: acquiring all the non-SMIL files in the parsing result and counting the number of all the non-SMIL files as a first non-SMIL file number.
2. The method according to claim 1 , wherein the step A specifically comprises: A1: parsing an original MMS data packet and acquiring all the files in the original MMS data packet; every time a file is acquired, determining a format of the file by checking a content-type field of the file and saving the file into a file body of a corresponding format; A2: acquiring all the non-SMIL files in the parsing result and counting the number of all the non-SMIL files as a first non-SMIL file number. 4. The method according to claim 2 , wherein for the non-SMIL files of different file formats, their respective file bodies are of list structures; all the non-SMIL file lists of different file formats are combined into a non-SMIL file sequence.