Unresolved reference: SavedStateVMFactory

Question

I am following the "Guide to app architecture" (Jetpack) and it cannot resolve references as below.

I already added the libraries:

build.gradle (Module: app):

def lifecycle_version = "2.0.0"
implementation "androidx.lifecycle:lifecycle-runtime:$lifecycle_version"
implementation "androidx.lifecycle:lifecycle-extensions:$lifecycle_version"

build.gradle (Project: ProjectName)

allprojects {
    repositories {
        google()
        jcenter()    
    }
}

What is missing to work?

Answer 1

There's two issues:

1) ViewModel-SavedState is a separate artifact that needs to be included:

def viewmodel_savedstate_version = "1.0.0-alpha02"
implementation "androidx.lifecycle:lifecycle-viewmodel-savedstate:1.0.0-alpha01"

2) As per the 1.0.0-alpha02 release notes:

SavedStateVMFactory is renamed to SavedStateViewModelFactory.

So make sure you're using SavedStateViewModelFactory in any place where you would otherwise have used SavedStateVMFactory.