IMPORTANT: Remember to add your package name before you copy and paste this java code into the JustJava app's MainActivity.java file.

MainActivity.java

/**
 * IMPORTANT: Make sure you are using the correct package name. 
 * This example uses the package name:
 * package com.example.android.justjava
 * If you get an error when copying this code into Android studio, update it to match teh package name found
 * in the project's AndroidManifest.xml file.
 **/
 
 package com.example.android.justjava; 
 


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

/**
 * 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 order button is clicked.
     */
    public void submitOrder(View view) {
        display(1);
    }

    /**
     * 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);
    }
}

its my last project of the Android Developers final project for Congratulations to Nani

BUTTON CLICK
Modify activity_main.xml to add this Button XML attribute.
android:onClick = "submitOrder"
Replace entire MainActivity.java file with the file provided in the link to the code.
Run app on device. what can i do? pls tell me the answer of these Question
What happens when you click on the Button?

Modify activity_main.xml to add this Button XML attribute.
android:onClick = "submitOrder"
Replace entire MainActivity.java file with the file provided in the link to the code.
Run app on device.
What happens when you click on the Button?
Solution

1. I modify activity_main.xml to onclick attribute
2. I copy the MainActivity.java by new version ,then I click to run,it display nicely
3. it update the quantity value one
   I still didn't get the answer of the question ? Help Help

fun main()
{
mood == "happy" && weather == "Sunny" -> "go for a walk"
else -> "Stay home and read."
if else->
whatShouldIDoToday("sad")
}

Create a program that suggests an activity based on various parameters.

1. Start in a new file with a main function.
2. From main(), create a function, whatShouldIDoToday().
3. Let the function have three parameters.
   mood: a required string parameter
   weather: a string parameter that defaults to "sunny"
   temperature: an Integer parameter that defaults to 24 (Celsius).
4. Use a when construct to return some activities based on combinations of conditions. For example:
   mood == "happy" && weather == "Sunny" -> "go for a walk"
   else -> "Stay home and read."
5. Copy/paste your finished function into REPL, and call it with combinations of arguments. For example:
   whatShouldIDoToday("sad")

Stay home and read.

fun describe(obj: Any): String =when(mood == "happy" && weather == "Sunny" -> "go for a walk")
{
mood -> "happy"
"sunny" -> "Go for a walk"
weather -> "Stay home and read."
else -> whatShouldIDoToday("Sad")
}
fun main() {
println(describe(happy))
println(describe("sunny"))
println(describe(weather))
println(describe("WhatShouldIDoToday"))

}

//The output is //
Go for a walk
Stay home and read.
Sad

hello

hi can I make u my friend.

Sure! :) O zi buna, Alexandru Dades +40755890524

…

On Sun, 6 Jul 2025 at 15:36, bama397 ***@***.***> wrote: ***@***.**** commented on this gist. ------------------------------ hello hi can I make u my friend. — Reply to this email directly, view it on GitHub <https://gist.github.com/udacityandroid/83242daf8a43b743d05e98733a35b19f#gistcomment-5664926> or unsubscribe <https://github.com/notifications/unsubscribe-auth/AH7GP4NJB7BGZEDDKTBP6ZT3HEJ3XBFKMF2HI4TJMJ2XIZLTSKBKK5TBNR2WLJDUOJ2WLJDOMFWWLO3UNBZGKYLEL5YGC4TUNFRWS4DBNZ2F6YLDORUXM2LUPGBKK5TBNR2WLJDHNFZXJJDOMFWWLK3UNBZGKYLEL52HS4DFVRZXKYTKMVRXIX3UPFYGLK2HNFZXIQ3PNVWWK3TUUZ2G64DJMNZZDAVEOR4XAZNEM5UXG5FFOZQWY5LFVAZTQMRXGAZDINFHORZGSZ3HMVZKMY3SMVQXIZI> . You are receiving this email because you commented on the thread. Triage notifications on the go with GitHub Mobile for iOS <https://apps.apple.com/app/apple-store/id1477376905?ct=notification-email&mt=8&pt=524675> or Android <https://play.google.com/store/apps/details?id=com.github.android&referrer=utm_campaign%3Dnotification-email%26utm_medium%3Demail%26utm_source%3Dgithub> .

ሰላም ጓደኞቼ

finally i did it after hard works
try this code
package _"com.example.android.justjava" -(make sure to write you package name)

import android.os.Bundle;
import android.view.View;
import android.widget.Button;
import android.widget.TextView;
import androidx.appcompat.app.AppCompatActivity;
public class MainActivity extends AppCompatActivity {

@OverRide
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
TextView num = findViewById(R.id.num);
Button order1 = findViewById(R.id.order);
/**
* This method is called when the order button is clicked.
/
order1.setOnClickListener(new View.OnClickListener() {
@OverRide
public void onClick(View view) {
display1(1);
}
/*
* This method displays the given quantity value on the screen.
*/
private void display1(int number)
{
// TextView quantity = (TextView) findViewById(R.id.quantity);
num.setText("" + number);
}

});

}
}

Hie Good people, anyone using Android Studio, Narwhal 2025.1.1, looking for help, I am stuck here with confusing java code errors. Here is my "activity_main.xml" solution, please help,,

<TextView
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Quantity"
    android:textAllCaps="true"
    android:textSize="16sp"
    android:padding="8dp" />
<TextView
    android:id="@+id/quantity_text_view"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="0"
    android:textSize="16sp"
    android:textColor="@android:color/black"
    android:padding="8dp" />
<Button
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:text="Order"
    android:textAllCaps="true"
    android:onClick="submitOrder"
    android:layout_margin="8dp" />

Looking for the java code solution to make this work, I have googled these things up, they talk about updating the code and stuff, changing dependencies and stuff, I have been going through codes, line by line, word for word, it is just adding confusion upon confusion, thank you to those who will help!

Anyone around? Hey there!

I have tried a lot but I can't get the exact response for the answer

Modify activity_main.xml to add this Button XML attribute.
android:onClick = "submitOrder"
Replace entire MainActivity.java file with the file provided in the link to the code.
Run app on device.
What happens when you click on the Button?

Same here @ahmed-seid, should we start by learning Java, my friend? To be honest it's wrecking my head!

Hie people. What's up? Anyone with the JAVA code solution here!