Tech Winter Break + GDG On Campus .pptx

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ANDROID WORKSHOP

AKA imselmon 😎
Salman Shaikh
Hey 👋 I’m Salman
(Zain)
Founder @ Scattr, Triplist

I do
An Dr. Strange of
Development Verse
Web, Mobile, and Cloud
Development

● Basic computer literacy
● Basic math skills
● Computer & headphones
● Internet connection
● (Optional) Android device & USB cable
Prerequisites

● Build your first Android apps
● Set up Android Studio on your computer
● Learn the basics of the Kotlin programming
language
● Learn Jetpack Compose
● Discover resources to continue learning
Learning Objectives

1. Why are you here?
2. What are you goals?
3. How do you plan to achieve them?

Who would like to share?

Android is an open-source operating
system (OS) for mobile devices, such as
smartphones, tablets, and smartwatches
What is Android

TOPIC
Presentation
W
H
W
H
Say Cheesss
Wrap up
Today’s Schedule

Android Basics
with Compose Course

Unit 1: Your first
Android App

A Pathway

Take a Quiz

Earn badges!

Session Overview

Kotlin Programming
Language
Use Kotlin to start writing Android
apps.
Kotlin helps developers be more
productive.

Kotlin Playground
Write and run Kotlin code
in
the browser.

Program
A series of instructions for a
computer to perform some
action.
fun main() {
println("Hello, world!")
}
Output:
Hello, world!

Code
Step by step instructions for
what the computer should do.
fun main() {
}
Output:
Hello, world!

main Function
The main function is the entry
point, or starting point, of the
program.
Start
here
fun main() {
}
Output:
Hello, world!

Functions
A function is a segment of a program that
performs a specific task.
You can have many functions in your program
or only a single one.

Defining a function
Functions begin with the fun
keyword.
fun displayIntroduction() {
}

Defining a function
Functions have a name so that
they can be called.
}

Defining a function
Functions need a set of
parentheses after the function
name in order to surround the
function inputs.
}

Defining a function
The curly braces make up the
function body and contain the
instructions needed to execute
a task.
}

Putting it together
// We will fill this out!
}
Output:
Hi I’m Meghan and I am 28 years old

A container for a single piece of
data.
Variables

My name is and I am
years old
Variables
name age

My name is and I am years old
Variables
Name value: Meghan
Age value: 28
Output:
My name is Meghan and
I am 28 years old
Name value: Janet
Age value: 49
Output:
My name is Janet and I
am 49 years old
name age

Basic data types
Kotlin Data type What kind of data it can contain Example literal values
String Text
“Add contact”
“Search”
Int Whole integer number
32
-59873
Double Decimal number
2.0
-37123.9999
Float
Decimal number (less precise than a
Double). Has an f or F at the end of the
number.
5.0f
-1630.209f
Boolean
true or false. Use this data type when there
are only two possible values.
true
false

val keyword
Use when you expect the variable value
will not change.
Example: name
var keyword
Use when you expect the variable value can
change.
Example: age
Defining a variable

Defining a variable
Variables start with a var or val
keyword.
val name: String = "Meghan"
var age: Int = 28
}

Defining a variable
All variables must have a name.
var age: Int = 28
}

Defining a variable
Data type is the type of data
that the variable holds.
var age: Int = 28
}

Defining a variable
The initial value is the value that
is stored in the variable.
var age: Int = 28
}

Putting it together
val name = "Meghan"
val age = 28
println("Hi I'm $name and I am $age years old")
}

Putting it together
fun main() {
displayIntroduction()
}
val name = "Meghan"
val age = 28
println("Hi I'm $name and I am $age years old")
}
Output:
Hi I’m Meghan and I am 28 years old

Break

Let’s get started

Unit 1: Pathway 1

Work on Unit 1, Pathway 1
Have a Question?
Just ask

Welcome back
And congrats!

What’s coming next:

Learn More

HYYYYYYYYYOOOOOO
Optional resources to check out:
● Official Android Developers Site: developer.android.com
● Official Android Developers Blog (for announcements)
● Android Developers Medium Blog (for more technical
articles)
● Android Developers YouTube channel
● Follow @AndroidDev on Twitter
● Follow @AndroidDev on LinkedIn
● Subscribe to the Android Developer Newsletter

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