I need to just show the map on my physical device without any functionality, but each map library needs an API key or something like that, maybe someone knows any use cases for any map library for simplicity? thx!
You need an API key if you want to use the map services.
Alternatively, if you just want to point to a given pleace and display a map showing that place:
The Webview inside your app will render the map as your browser does.