Android media library data update

Android maintains many internal databases, such as media databases and contact databases.

The Media Database receives intent. action_media_intent, intent. action_boot_complete, intent. action_media_scanner_scan_file and other peripherals such as the SD card are automatically scanned during broadcast, and information is obtained and written to the database. Therefore, if you want to call the system's scanning function, you can send broadcasts,

Call sendbroadcast (new intent (intent. action_media_intent, Uri. parse ("file: //" + environment. getexternalstoragedirectory ()));

The system also provides other functions that can be called by sending broadcasts. This is an idea .....