AndroidViewModel instantiated without passing application context?

Question

I am currently digging through the Android Room with a View sample app, full source code available here. In this project, an WordViewModel of type Android

Answer 1

Dependencies

def lifecycle_version = "2.2.0"
implementation "androidx.lifecycle:lifecycle-runtime-ktx:$lifecycle_version"
implementation "androidx.lifecycle:lifecycle-viewmodel-ktx:$lifecycle_version"
implementation "androidx.lifecycle:lifecycle-livedata-ktx:$lifecycle_version"
kapt "androidx.lifecycle:lifecycle-common-java8:$lifecycle_version"

implementation "androidx.fragment:fragment-ktx:1.2.4"

Application Class

class App : Application() {
    //Code
}

AndroidViewModel Class

class TestVM (app : android.app.Application) : AndroidViewModel(app){
    // Cast app to the application class
    val myApplication : App = app as App
}

In Fragment

override fun onCreate(savedInstanceState: Bundle?) {
    super.onCreate(savedInstanceState)
    val viewModel = ViewModelProvider(this).get(TestVM::class.java)
}