How to make Android settings well-equipped for various Android versions?

[franky]

Hi all,

What version of NDK and JDK do you recommend that I use for Qt 5.12.3 on Windows 10 x64 so that the QML apps I create using them will be working properly on devices running a variety of Android versions from 4.4 to the current one which is 9 for now? I mean a way to keep Android settings well-equipped so that the Android apps come out of this strategy will work as expected on Android devices regardless of the version of Android they're running?

Is there such an strategy?
Is making all the stuff up-to-date sufficient for that purpose?