Do I need compatibility if the application is written for a specific device?

Question

Android

You need to write a highly specialized application for a specific device - a tablet on Android 7.0.
Can you still need Backward Compability during development?
If not, but then I will switch to Android 8.0, will I need backward compatibility?
Maybe there are some additional tips for such a narrowly focused development? :)

Answer 1

Can you still need Backward Compability during development?
I don't know, it depends on TK. If the TOR does not assume backward compatibility with previous versions, then there is no need to bother. Such issues are resolved at the stage of compiling Wishlist, but not as during the writing of the project. Depending on the life cycle chosen, the customer may want to add support for older buckets later on, but that's not your problem.
If not, but then I will switch to Android 8.0, will I need backward compatibility?
Backward compatible != binary compatible. In general, the old code for Android +- fully runs on new versions, there are nuances, but there are not many of them.
I can advise using support libraries v7, v4, etc. It's a good idea to immediately write for the maximum number of android versions, if this does not involve large labor costs. Support libraries are as compatible as possible with the usual android APIs, and code using support libraries from code for a specific OS version usually differs only in different imports.