GitHub - 10XMairing/DaggerSubComponentsExample: simple implementation of Dagger subcomponents, connecting the ApplicationComponent to the ActivityComponent. Also uses viewmodel with ViewModelFactoy and Retrofit

Dagger 2 with components and sub-components

Connecting your Application compoenent with your MainComponent making the application level dependencies in this case the Retrofit's ApiService to the Activity Level Module.
The ApiService collected from the ApplicationComponent is passed on to the constructor of ViewModel using ViewModelFactory
The data is loaded in the ViewModel (MainViewModel) RIght now only the response is logged.

All of this can be achieved in a better format using Android-dagger helper classes.