I published another Android application today, bringing the total of my published Android applications to 3.
The Android Application, Main Viewer NG, also known as TextViewerNG, is an Android text and html viewer. It allows the user to view text or HTML files stored on your Android device, or on the SD card.
It uses the enhanced Lysesoft AndExplorer (if installed) to select files on your Android device. Otherwise, it opens up a dialog allowing the user to enter the filename to view.
While developing and using this application, there were quite a few times when I forgot what I was supposed to do after launching the application. To fix this issue, after every few seconds, if no activity is detected, a hint is displayed informing the user to press the menu key in order to load a file.
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