Saving Data on Android

ViewModel
, 
LiveData
, 
WorkManager
 and 
DataBinding
.
•
UI
 contains widgets, helpers, animation, transition and utility components that 
allow you to design apps with a good, easy-to-use interface.
•
Foundation
 provides components that bring backwards compatibility with other 
Android tools and libraries. It includes 
Android KTX
 and 
AppCompat
.
•
Behavior
 helps your app integrate with Android's native services, such as 
permissions and notifications. It includes the 
Download Manager
, 
Media
 and 
Preferences
 APIs.
At this point you might be wondering...
What does all of this have to do with Room?
Well, Room is part of the architecture components previously mentioned and it is 
Google's ORM meant to replace other libraries such as greenDao or SugarORM.
An app built with Room and Google's architecture components usually relies on a set 
of components you're going to see in detail in the following sections.