// The finished onCreate method
@Override
protected void onCreate(Bundle savedInstanceState) {
   super.onCreate(savedInstanceState);
   setContentView(R.layout.activity_main);
   mViewModel = ViewModelProviders.of(this).get(ScoreViewModel.class);
   displayForTeamA(mViewModel.scoreTeamA);
   displayForTeamB(mViewModel.scoreTeamB);
}

// An example of both reading and writing to the ViewModel
public void addOneForTeamA(View v) {
   mViewModel.scoreTeamA = mViewModel.scoreTeamA + 1;
   displayForTeamA(mViewModel.scoreTeamA);
}