/**
 * This app displays an order form to order coffee.
 */
public class MainActivity extends AppCompatActivity {
    int quantity = 2;
    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
    }

    /**
     * This method is called when the order button is clicked.
     */
    public void submitOrder(View view) {
        int numberOfCoffees = 2;
        display(numberOfCoffees);
        displayPrice(numberOfCoffees * 5);
    }
    /**
     * This method is called when the order button is clicked.
     */
    public void increment(View view) {
        quantity = quantity + 1;
        display(quantity);
    }
    /**
     * This method is called when the order button is clicked.
     */
    public void decrement(View view) {
        quantity = quantity - 1;
        display(quantity);
    }