Junior — Middle
Can you explain the concept of scope in Jetpack ViewModel and how it is used?
sobes.tech AI
Answer from AI
Scope in Jetpack ViewModel defines the lifecycle of the ViewModel and which UI components it is associated with.
For example, if a ViewModel is created with the scope of an Activity, it will live as long as the Activity and retain its state during fragment recreations within that Activity. If a ViewModel is created with the scope of a specific Fragment, it will be destroyed along with that Fragment.
This allows for efficient management of UI state and data, avoiding loss of information during configuration changes or navigation. In code, it looks like this:
val viewModel = ViewModelProvider(this).get(MyViewModel::class.java) // this - Fragment or Activity
Where this defines the scope of the ViewModel.