Example of dependency injection, referenced by https://www.reddit.com/r/androiddev/comments/aw860w/doesnt_dependency_injection_break_encapsulation/ehku2tt/

LocalProfileAPI.java

public class LocalProfileAPI implements ProfileAPI {

    public Profile retrieveProfile() {
        /*... retrieve from DB or something ...*/
        return new Profile();
    }
}

Model.java

class Model {

    private ProfileAPI api;

    @Inject
    public Model(ProfileAPI api) {
        this.api = api;
    }

    public Profile getProfile() {
        return api.retrieveProfile();
    }
}

Presenter.java

class Presenter {
    private Model model;

    @Inject
    public Presenter(Model model) {
        this.model = model;
    }

    public void showProfile() {
        Profile profile = model.getProfile();
        doSomethingWithProfile();
    }

    private void doSomethingWithProfile() {
        /*...*/
    }
}

ProfileAPI.java

interface ProfileAPI {
    public Profile retrieveProfile();
}

RemoteProfileAPI.java

public class RemoteProfileAPI implements ProfileAPI {
    public Profile retrieveProfile() {
        /*... retrieve from Remote or something ...*/
        return new Profile();
    }
}

Screen.java

class Screen {

    private Presenter presenter;

    @Inject
    public Screen(Presenter presenter) {
        this.presenter = presenter;
    }

    public void onSomeEvent(){
        presenter.showProfile();
    }
}