netmonster-core VS architecture-samples

I looked at it for about 2s and found this link: https://github.com/mroczis/netmonster-core

Most of what you can access is covered by TelephonyManager - take a look at the source code for NetMonster if you want an example to go off of.

Check whether CA is active

Also, a heads up - NetMonster isn't always accurate in its determination of CA. It makes guesses with a few steps - first, it checks whether CA is active at all, and then it just gets a list of every neighboring cell your phone can see.

It makes these guesses based on whether LTE-A is active and what neighboring EARFCNs are detected.

Here's an example project on GitHub that demonstrates how to use a ViewModel in practice: https://github.com/android/architecture-samples/tree/master/BasicSample

For me this one is the best: Architecture samples it's easy to understand and covers lots of concepts.

Since I never had a mentor or any courses I decided to follow anyone in their development approaches and my choice was google team. There are repo which is supported and update for years, it changes and might slightly differ in branches. But it could answer your questions.

For merging multiple data-sources, like network and database, I can use Repository backed with NetworkDataSources and DbDataSources. For data manipulation, Kotlin's collection has many useful functions (map, reduce, groupBy, count, etc.). If I want to ensure a data can only be emitted once, a simple modification to LiveData is enough (SingleLiveData

Take a look on Android blueprints https://github.com/android/architecture-samples