After upgrading to the Android SDK 1.6, and upgrading my Android phone to Android 1.6, I was puzzled why my SMS Backup application stopped working, as it wasn't able to write to the SD card, until I realize that I was blocked by the Android's permission system.
Adding the android.permission.WRITE_EXTERNAL_STORAGE to the manifest solved the problem.
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