MainActivity.java

public class MainActivity extends AppCompatActivity {
    private TextView dataTextView;
    private TextView counterTextView;
    private StateViewModel stateViewModel;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        dataTextView = findViewById(R.id.data_textview);
        counterTextView = findViewById(R.id.counter_textview);
        setupModelView();
        attachObservers();
    }

    // Deal with loading state from ViewModel
    private void setupModelView() {
        stateViewModel = ViewModelProviders.of(this).get(StateViewModel.class);
        dataTextView.setText(String.format("Data: %s", stateViewModel.getData()));
    }

    private void attachObservers() {
        stateViewModel
                .getCounter()
                .observe(
                        this,
                        count -> {
                            counterTextView.setText(
                                    String.format("Count: %s", Long.toString(count)));
                        });
    }
}