I recently wrote 2 Windows scripts that very quickly pulls all Android apps from the Android phone, and install them back to the Android phone, for disaster recovery purposes.
Pulling Android apps from the Android phone
getapps.cmdadb shell ls /data/app > apps.txtc:\cygwin\bin\unix2dos --u2d apps.txtfor /F %%i in (apps.txt) do adb pull /data/app/%%i .
Restoring Android apps to the Android phone
installapps.cmdfor /f %%i in (apps.txt) do adb install %%i
In 2017, with the release of Delphi 10.2 Tokyo, Embarcadero introduced a specialized implementation of the Observer pattern into the System.Classes unit. While it has been in the wild for 9 years, it remains a "hidden" architecture for many, primarily because it serves as the invisible engine behind LiveBindings. Other than live bindings, you can also use the Observer pattern as a way to update component settings to the Windows registry, an .ini file, or persist it elsewhere.
System.Classes