Saving Data on Android

Room and Google's architecture 
components
Android has been around for quite some time. In the beginning, Android apps were 
very simple and most performed trivial tasks, including calculators, calendars and to-
do lists. But things have changed and mobile apps are more complex than ever. Now, 
there are media players, social networks, chat apps and even fast-paced 3D games.
As apps became more complex, the code followed suit. Developers adopted their own 
practices on how to develop the architecture of their apps. Some programmers 
preferred to use an MVVM architecture with SugarORM while others preferred to use
Saving Data on Android
Chapter 5: Room Architecture
raywenderlich.com
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MVP with greenDAO and Firebase. This led to confusion since there was no 
recommended or official way of doing things.
Therefore, at the 2018 I/O conference Google announced 
Jetpack
, a set of libraries 
focused on creating a robust architecture for your apps by eliminating boilerplate 
code and simplifying complex tasks such as database interactions and background 
tasks.
Jetpack is focused on four areas of Android Development:
•
Architecture
 contains components that allow you to create robust apps that are 
scalable, maintainable and easy to test. It includes libraries such as