package com.example.android.justjava;

import android.os.Bundle;
import android.support.v7.app.AppCompatActivity;
import android.view.View;
import android.widget.TextView;
import java.text.NumberFormat;

/**
 * This app displays an order form to order coffee.
 */
public class MainActivity extends AppCompatActivity {

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_main);
}

/**
 * This method is called when the + button is clicked.
 */
public void increment(View view) {
    int quantity = 2;
    quantity = 3;
    display(quantity);
}

/**
 * This method is called when the - button is clicked.
 */
public void decrement(View view) {
    int quantity = 1;
    display(quantity);
}

/**
 * This method is called when the order button is clicked.
 */
public void submitView view) {
    int coffeesNum = 2;
    display(coffeesNum);
    displayPrice(coffeesNum * 5);
}
/**
 * This method displays the given price on the screen.
 */
private void displayPrice(int number) {
    TextView priceTextView = (TextView) findViewById(R.id.price_text_view);
    priceTextView.setText(NumberFormat.getCurrencyInstance().format(number));
}

/**
 * This method displays the given quantity value on the screen.
 */
private void display(int number) {
    TextView quantityTextView = (TextView) findViewById(R.id.quantity_text_view);
    quantityTextView.setText("" + number);
}