Saving Data on Android

Separation of Concerns
: Activities and fragments usually have to execute 
different operations such as database transactions, HTTP requests, UI updates and 
more. It is better to separate 
View
s from the business logic by delegating this task 
to a more appropriate class such as the 
ViewModel
s.
But how does the ViewModel help solve these issues?
Well, 
ViewModel
 is specifically designed to hold and manage data related to your 
user interface. Just like 
LiveData
 the 
ViewModel
 is lifecycle aware, which means that 
it can react to the state of your Android components. Furthermore, using factories, 
and dependency management, it can survive configuration changes such as screen 
rotations. Therefore you won't need to manually restore data using methods such as 
onSaveInstanceState()
, you can simply retrieve everything you stored within the 
ViewModel
.
Saving Data on Android Chapter 9: Using Room with Google's Architecture Components
raywenderlich.com
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The 
ViewModel
 sounds like the perfect choice to manage the questions and answers 
for your DroidQuiz app, right?
You should find a package under