Compose_Camp_Session_1_2.pptx

This work is licensed under the Apache 2.0 License
WELCOME TO
COMPOSE CAMP
SESSION 1
01-OCTOBER-2022
5:00 PM - 6:00 PM

Jenil Nagrecha
IIT Patna | EEE'24
Facilitator
LinkedIn
I am currently pursuing Electrical and Electronics
Engineering from IIT Patna I've been making mobile
apps for a year by using Android and flutter, I am also
an active member of open-source community for
flutter apps and have created a few apps of my own
you can visit my GitHub profile to know more about my
projects!!

Android studio
Installation
Android
Studio Basics
Kotlin
Playground
Learn Basics of Kotlin and
How to use it in Android
Studio.
Learn Basics of Android
Studio and Lookout on
Features of Android
Studio.
Install and set up Android
Studio, so that you can
create your first project
and run it on a device or
emulator.
Topics For Session 1 -
Kotlin Playground

Android Studio
Android Studio is the official integrated development environment
(IDE) for Android app development built and distributed by Google.
An IDE contains tools that make it easy for software developers to
design, build, run, and test software, in this case, apps for the
Android platform. Android Studio uses IntelliJ IDEA as its foundation
and includes the Android plugin pre-installed along with some
modifications specifically for the Android platform.

Installation steps - Windows
The following are the system requirements for Android Studio on Windows.
● 64-bit Microsoft® Windows® 8/10/11
● x86_64 CPU architecture; 2nd generation Intel Core or newer, or AMD CPU with
support for a Windows Hypervisor
● 8 GB RAM or more
● 8 GB of available disk space minimum (IDE + Android SDK + Android Emulator)
● 1280 x 800 minimum screen resolution
Check system requirements

Download and install
Android Studio
Download Android Studio from the Android Studio download page.
You can Follow this Link for installation - Installation Guide refer this link

Welcome to Android Studio 🥳🎉

Refer to this link
Here’s How to create a new project

Android Studio Overview (Refer to this link)

WELCOME TO
COMPOSE CAMP
SESSION 2
01-OCTOBER-2022
6:00 PM - 7:00 PM

Doubts
Express any doubts you
facing in any of above
things we will be
discussing.
AVD is a system installed
on your machine which
enables us to install apps
in android without any
physical device.
Topics For Session 2-
AVD Setup

Setup AVD
In this task, you'll use the Device Manager to create an Android Virtual
Device (AVD). An AVD is a software version, also called an emulator, of a
mobile device that runs on your computer and mimics the configuration of
a particular type of Android device. This could be any phone, tablet, TV,
watch, or Android auto device. You'll use the AVD to run the Birthday Card
app.
refer to link

Setup AVD refer to link

How to
connect
your
Android
device

Enable USB Debugging
● On your Android device, tap Settings > About phone.
● Tap Build number seven times.
● If prompted, enter your device password or pin. You know
you succeeded when you see a You are now a developer!
message.
refer to link

From here in computer, you can run
your Android app in AVD or
physical Android device(Just select
the device and click on play button)

Kotlin PlayGround
● Variables
● Functions
● Write conditionals in Kotlin
● Use nullability in Kotlin
● Use classes and objects in Kotlin
● Use function types and lambda expressions in Kotlin

Variable and data types refer to link

Variable and data types
fun main() {
val count: Int = 2
println("You have $count unread messages.")
}
OUTPUT : You have 2 unread messages.
refer to link

String :
fun main() {
val nextMeeting = "Next meeting is:"
val date = "January 1"
val reminder = nextMeeting + date
println(reminder)
}
OUTPUT : Next meeting is:January 1
refer to link

Double :
fun main() {
val trip1: Double = 3.20
val totalTripLength: Double = trip1 + trip2 + trip3
println("$totalTripLength miles left to destination")
}
OUTPUT : 9.02 miles left to destination

Boolean :
fun main() {
val notificationsEnabled: Boolean = false
println("Are notifications enabled? " + notificationsEnabled)
}
OUTPUT : Are notifications enabled? false

Functions in Kotlin
fun main() {
birthdayGreeting()
}
fun birthdayGreeting() {
println("Happy Birthday, Rover!")
println("You are now 5 years old!")
}
OUTPUT : Happy Birthday, Rover!
You are now 5 years old!
refer to link

Return a value from Function
fun birthdayGreeting(): String {
val nameGreeting = "Happy Birthday, Rover!"
val ageGreeting = "You are now 5 years old!"
return "$nameGreetingn$ageGreeting"
}
OUTPUT : Happy Birthday, Rover!
fun main() {
val greeting = birthdayGreeting()
println(greeting)
}
refer to link

Add a parameter to a function
fun birthdayGreeting(name: String): String {
val nameGreeting = "Happy Birthday, $name!"
val ageGreeting = "You are now 5 years old!"
}
OUTPUT : Happy Birthday, REX!
fun main() {
println(birthdayGreeting("REX"))
}
refer to link

Add parameters to a function
fun birthdayGreeting(name: String, age: Int): String {
val nameGreeting = "Happy Birthday, $name!"
val ageGreeting = "You are now $age years old!"
}
OUTPUT : Happy Birthday, REX!
fun main() {
println(birthdayGreeting("REX", 6))
}

Write Conditionals
● If/Else condition -

If/Else Condition
● Take an example over here -
fun main() {
val trafficLightColor = "Black"
if (trafficLightColor == "Red") {
println("Stop")
} else if (trafficLightColor =="Yellow")
{
println("Slow")
} else {
println("Go")
}
}
refer to link

Write Conditionals
● When conditional -

When Conditional
● Take an example over here -
fun main() {
val trafficLightColor = "Yellow"
when (trafficLightColor) {
"Red" -> println("Stop")
"Yellow" -> println("Slow")
"Green" -> println("Go")
else -> println("Invalid traffic-light color")
}
}
refer to link

Nullability in Kotlin
In Unit 1, you learned that when you declare a variable, you need to assign it a value
immediately. For example, when you declare a Favourite Actor variable, you may assign
it a "Sandra" string value immediately.
what if you don't have a
favorite actor?
refer to link

Nullability in Kotlin
Nullable vs Non-nullable Variables
fun main() {
var favoriteActor: String =
"Sandra Oh"
favoriteActor = null
println(favoriteActor)
}
Output Error :
fun main() {
var favoriteActor: String? =
"Sandra Oh"
favoriteActor = null
}
Output :
Sandra Oh
null
refer to link

Classes and Objects
● Defining a Class -
class SmartDevice {
// empty body
}
fun main() {
}
refer to link

Classes and Objects
● Defining class methods -
class SmartDevice {
fun turnOn(){
println("Smart device is turned on.")
}
fun turnOff(){
println("Smart device is turned off.")
}
}
fun main() {
val smartTvDevice = SmartDevice()
smartTvDevice.turnOn()
smartTvDevice.turnOff()
}
refer to link

Classes and Objects
● Defining class properties -
class SmartDevice {
val name = "Android TV"
val category = "Entertainment"
var deviceStatus = "online"
fun turnOn(){
println("Smart device is turned on.")
}
fun turnOff(){
println("Smart device is turned off.")
}
}
fun main(){
val smartTvDevice = SmartDevice()
println("Device name is: ${smartTvDevice.name}")
smartTvDevice.turnOn()
smartTvDevice.turnOff()
}
refer to link
Must Read

Thankyou
See you in session 3
and 4..

Compose_Camp_Session_1_2.pptx

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Compose_Camp_Session_1_2.pptx