SplashActivityViewModel.java

public class SplashActivityViewModel extends BaseViewModel<SplashActivityNavigator> {

    private static final int SPLASH_DURATION_IN_MILLIS = 1500;

    public SplashActivityViewModel(@NonNull Application application, SplashActivityNavigator navigator) {
        super(application, navigator);
    }

    void startWorking() {

        final LogInResponse.User user = PreferenceManager.getInstance(getApplication()).getUser();

        new Handler().postDelayed(new Runnable() {
            @Override
            public void run() {
                if (user == null) {
                    getNavigator().openLogInActivity();
                } else {
                    getNavigator().openMainActivity();
                }
            }
        }, SPLASH_DURATION_IN_MILLIS);
    }
}