Mix how app gets the cache size and clears the cache

Hybrid app packaged with Hbulider
has a requirement to get the cache size, display it, and provide the ability to clear the cache.

could you tell me how to achieve it and what are the ideas

Mar.02,2021
MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-1b36f09-405df.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b36f09-405df.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
Need Help?