Add to MainActivity.java

Calculate price method

/**
 * Calculates the price of the order.
 * 
 * @param quantity is the number of cups of coffee ordered
 */
private void calculatePrice(int quantity) {
    int price = quantity * 5;
}

package com.example.kisho.viewbutton;
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 {
  int quantity = 0;
  @OverRide

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

  public void increment(View view) {

   quantity = quantity + 1;
   displayQuantity(quantity);
  

  }
  /**

  • This method decrement displays the increase int on the screen.
    /
    public void decrement(View view) {
    quantity = quantity - 1;
    displayQuantity (quantity);
    }
    /*
  • This method is called when the order button is clicked.
  • here displayMessage is the verbal
    */

  public void submitOrder(View view) {
  String price = "Total: $" + calculatePrice(quantity);
  displayMessage(price + "\n Thank You!");

   calculatePrice(quantity);
  

  }

  private int calculatePrice(int quantity) {
  return quantity * 5;
  }
  /**

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

  /**

  • This method increment displays the increase int on the screen.
    */
    private void displayMessage(String message){
    TextView PriceTextView = (TextView)
    findViewById(R.id.price_text_view);
    PriceTextView.setText(message);

}

@PrincePascal a shortest version would be

/**
     * Calculates the price of the order.
     *
     * @param quantity is the number of cups of coffee ordered
     */
    private int calculatePrice(int quantity) {
       return quantity * 5;
    }

DONE

Done too

Done

Done

done

This is my code to calculate price of coffees.
int quan=2;
public void submitOrder(View view)
{
String pm="Your order is "+quan+"\n Your order is ready\n";
pm=pm + " Total is $"+ calculatePrice();
pm=pm+" \n thank you visit again ";
displayMessage(pm);
}
public void increment(View view)
{
quan=quan+1;
display(quan);
}
public void decrement(View view)
{
display(quan=quan-1);
}
/**
* This method displays the given quantity value on the screen.
*/
private void display(int number) {
TextView quantityTextView = (TextView) findViewById(R.id.one_text_view);
quantityTextView.setText("" + number);
}
private void displayPrice(int number) {
TextView priceTextView = (TextView) findViewById(R.id.dollar_text_view);
priceTextView.setText(NumberFormat.getCurrencyInstance().format(number));
}
private void displayMessage(String message) {
TextView priceTextView = (TextView) findViewById(R.id.dollar_text_view);
priceTextView.setText(message);
}
private int calculatePrice() {
int price = quan * 10;
return price;
}

/**

• Calculates the price of the order.
• @param quantity is the number of cups of coffee ordered
• @param price is the price of 1 cup of coffee
  */
  private int calculatePrice(int quantity,int price){
  return (quantity * price);
  }

Done

Done

/**
* This method is called when the order button is clicked.
*/

public void submitOrder(View view) {

    int price = quantity * 5;
    //String priceMessage = "That would be $" + price + " please";
    //String priceMessage = "You owe" +" "+ price + " bucks, dude!";
    //String priceMessage = price + " dollars for " + quantity + " cups of coffee. Pay up.";
    //String priceMessage = "Total: $" + price + "\n" +  "Thank You!";
    String priceMessage = "Total: $" + price;
    //priceMessage = priceMessage + " Thank you!";
    priceMessage = priceMessage + "\nThank you!";
    displayMessage(priceMessage);

    //calculatePrice(quantity);
    // calculatePrice(quantity, 10);
    calculatePrice();
}

/**
 * Calculates the price of the order.
 *
 * @param quantity    is the number of cups of coffee ordered
 * @param pricePerCup is the price of one cup of coffee
 */

//private void calculatePrice(int quantity ) {
//private void calculatePrice(int quantity, int pricePerCup){
private void calculatePrice(){
    int price = quantity * 5;
    //int price = quantity * pricePerCup;

}

/**
 * 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);
}

/**
 * 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 text on the screen.
 */

private void displayMessage(String message) {

    TextView priceTextView = (TextView) findViewById(R.id.price_text_view);

    priceTextView.setText(message);

}

}

private void calculatePrice(int quantity) {
int price = quantity * 5;
}

I experimented with private int method_name() but without an argument, and with a return type, tho

Got the same answer

thanks for the tips guys

Very very simple

done

Can someone help me please i have a problem when i press run the program give me error select android SDK !!!!

answer 1
int numberOfCoffees =0;int price=0;
public void submitOrder(View view) {
calculatePrice(numberOfCoffees);
String PriceMessge="Total: $"+price+ " \nThank You!";
displayMessage(PriceMessge);
}

/**
 * Calculates the price of the order.
 *
 * @param quantity is the number of cups of coffee ordered
 */
private int calculatePrice(int quantity) {
     price = quantity * 5;
    return price;
}

===============================================================
answer 2
int numberOfCoffees =0;int price=0;
public void submitOrder(View view) {
calculatePrice(numberOfCoffees,10);
String PriceMessge="Total: $"+price+ " \nThank You!";
displayMessage(PriceMessge);
}

/**
 * Calculates the price of the order.
 *
 * @param quantity is the number of cups of coffee ordered
 */
private int calculatePrice(int quantity,int prix) {
     price = quantity * prix;
    return price;
}

===========================================
answer 3
int numberOfCoffees =0;int price=0;
public void submitOrder(View view) {
calculatePrice();
String PriceMessge="Total: $"+price+ " \nThank You!";
displayMessage(PriceMessge);
}

/**
 * Calculates the price of the order.
 *
 * @param price is the number of cups of coffee ordered
 */
private int calculatePrice() {
     price = numberOfCoffees * 5;
    return price;
}

please help me
I can not find the just java app code to solve this test

I declared quantity as a global variable that is updated with increment and decrement buttons......

public void submitOrder(View view) {
    displayMessage(calculatePrice(quantity));
}

@org.jetbrains.annotations.NotNull
private String calculatePrice(int quantity){
    return priceMessage + "\n" + NumberFormat.getCurrencyInstance().format(quantity * pricePerCup);
}

where to find the new code of the project of this course? as submitOrder..etc?

public int displayQuantityA(int quantity,int price_of_per_coffee) {
int calculate = quantity * price_of_per_coffee;
return calculate;
}

public int displayQuantityB() {
int calculate = quantity * 5;
return calculate;
}

public int displayQuantityB() {
int calculate = quantity * 5;
return calculate;
}

public void submitOrder(View view) {
String priceMessage = "Free";
displayMessage(priceMessage);
}