Introduction to Android (in-short) - Itvedant, Thane | Mumbai | Navi Mumbai

Before we begin
In order to learn Android you must have some Basic knowledge Java.
Java: prerequisites for android development
 OOPS – Abstraction, Encapsulation, Polymorphism and Inheritance
 Tokens – Primitive data types, variables, constants, keywords such as
static, final, try, catch, etc.
 Type Casting and Visibility
 Arrays and Operators
 Control Statements

Before we begin
 Class Fundamentals – Inner and Anonymous Classes
 Inheritance, Interface, Package
 Multithreading and Exception Handling
 Java Annotations and IO
 Generics and Collections

Before we begin
Tools to use :
Android Studio
Android phone

Quiz Time  1/7
Sharing of common information is achieved by the concept of ?
a. polymorphism
b. encapsulation
c. inheritance
d. none of above

Quiz Time  2/7
Which constructs an anonymous inner class instance?
a. Runnable r = new Runnable() { };
b. Runnable r = new Runnable(public void run() { });
c. Runnable r = new Runnable { public void run(){}};
d. System.out.println(new Runnable() {public void run() { }});

Quiz Time  3/7
You want subclasses in any package to have access to members of a
superclass. Which is the most restrictive access that accomplishes this
objective?
a. public
b. private
c. protected
d. transient

Quiz Time  4/7
Which class can not be subclass in java ?
a. parent class
b. final class
c. abstract class

Quiz Time  5/7
Why are generics used?
a. Generics make code more fast.
b. Generics make code more optimised and readable.
c. Generics add stability to your code by making more of your bugs
detectable at compile time.
d. Generics add stability to your code by making more of your bugs
detectable at run time.

Quiz Time  6/7
Which of the following reference types cannot be generic?
a. Anonymous inner class
b. Interface
c. Inner class
d. All of the above

Quiz Time  7/7
public class Foo {
public static void main(String[] args) {
try { return; }
finally {
System.out.println( "Finally" );
}
}
}
What will be the output of the program?
a. An exception is thrown at runtime.
b. Compilation fails.
c. The code runs with no output.
d. Finally

History of Android
 Creation:
 Android, Inc. was founded in Palo Alto, California, United States in October 2003 by
Andy Rubin, Rich Miner, Nick Sears and Chris White
 Acquisition by Google:
 Google acquired Android Inc. in August 2005
 Open Handset Alliance (OHA)
 Android is then wholly developed by OHA with key employees Rubin, Rich and
Chris.
 In November 5, 2007, the OHA, a consortium of 84 firms has develop an open
standards for mobile devices.
 On the same day OHA also unveiled their first product, Android , a mobile device
platform built on the Linux Kernel version 2.6

History of Android Versions
 Android 1.0 – The Android Era officially began on October 22nd, 2008, when the T-
Mobile G1 launched in the United States
 Pull-down notification window
 Home screen widgets
 Deep, rich Gmail integration
 The Android Market
 Android 1.1 – It’s no coincidence that Danger’s Hiptop platform, which gave birth to the
sidekick, had been offering painless, phased over-the-air OS updates for years –
February 2009
 Dessert is Served – Android 1.5 “Cupcake” – In retrospect, it’s amazing to think that
Google could’ve shipped Android w/o any sort of soft keyboard. – July 2009
 On screen keyboard
 Clipboard improvements
 Video Capture and playbacks

 Android 1.6 Donut – Android 1.6 Donut was a far bigger deal than it’s “0.1”
increment would let on, perhaps none of the “Under The Hood” changes had a
more profound effect on the platform than resolution independence –
September 15, 2009
 Multiple screen resolution support
 Quick search box
 Android 2.0 / 2.1 Eclair – “BIG” would be an accurate description all around –
November 2009
 Multiple accounts support
 Google Maps Navigation
 Live Wallpapers
 Speech-to-text
 A new Lock Screen

 Android 2.2 Froyo – What did Google have to showcase in Froyo? Plenty – Mid
2010
 Redesigned home screen
 Android 2.3 Gingerbread – Google used the launch of Gingerbread as an
opportunity to gain some footing in the Mobile Gaming Market - December 2010
 More granular control over copy and paste
 Better battery and app management tools
 Support for front facing cameras
 Android 3.X Honeycomb – Honeycomb was, to say the least, and oddity –
divergence in Google’s Hard-Charging path towards smartphone dominance. –
February 2011
 The death of physical buttons
 Concept of action bar

 Android 4.0 Ice Cream Sandwich – ICS is, w/o question, the BIGGEST change for
Android in phones yet – October 2011
 Home screen improvements
 Android Beam (NFC Support)
 Face Unlock
 Data usage analysis
 New Calendar and Mail maps
 Android 4.1 Jelly Bean – After Honeycomb’s failure, a revamped tablet strategy –
July 2012
 Roboto refresh – Android’s signature font has been reworked
 Expandable, actionable notifications
 Widget flexibility
 Predictive text

 Android 4.2 Jelly Bean – Here comes the point updates – November 2012
 Redesigned clock app and clock widgets
 Multiple user profiles
 Photospheres – panoramic images
 Daydream screensavers
 Android 4.3 Jelly Bean – Designed with gaming and Nexus 7 in mind – July
2013
 Android 4.4 Kitkat – Refining android for Everyone – October 2013
 Kitkat is faster, more efficient and less resource intensive

 Android 5.0 Lollypop – Putting Android on every screen – November 12,
2014
 Material Design
 Improved Notifications – notification on lock screen
 Project Volta – Improved battery life
 Android everywhere – Android Wear, Android TV, Android Auto

Linux Kernel
 Works as Hardware Access Layer (HAL)
 Device Drivers
 Memory Management
 Process Management
 Networking
 Security Settings

Libraries
 C/C++ libraries (Native libraries)
 Surface Manager
 Media Framework
 SQLite
 WebKit
 OpenGL

Android Runtime
 Dalvik Virtual Machine
 Developed by Dan Bornstein of Google
 .dex files
 Higher efficiency in low resource environments
 Multiple instances of VM
 Limited Memory and battery power
 Core Java Libraries
 java.*, javax.* - Basic java classes
 org.* - Internet/Web services
 android.* - App life cycle
 junit.* - Unit Testing

Application Framework
 Package Manager
 Window Manager
 Activity Manager
 Content Providers
 Telephony Manager
 Location Manager
 Resource Manager
 Notification Manager

Applications
 Built in user apps
 Apps from Android play store

Application Components
 Activity:
 Single screen with user interface
 IntentReceivers:
 Components that correspond to broadcast “Intents”
 Way to respond to external notification or alarms
 Intents:
 Think of Intents as a verb or object; a description of what you want done
e.g. VIEW, CALL, PLAY, etc.
 Activities and IntentReceivers describe what intents they can service
 Services:
 Faceless components that can run in background
e.g. music player, network download, live wallpaper, sync, etc.

Application Components
 ContentProviders:
 Enable sharing of data across applications:
e.g. address book, photo gallery
 Provides uniform APIs for querying, delete, update, insert
 Content is represented by URI and MIME type

Hello World Program
 Create Project with Android Studio

Hello World Program
 Select the minimum API level which your app supports.

Hello World Program
 Add an Activity

Hello World Program
 Configure your Activity
 Click Finish.
 Your project is created. Now run your project on real device or AVD.

Running our First Program on Real Device
 Plugin your device to machine using USB cable.
 Enable USB debugging on your device.
 Open one of your project files from Android Studio and click Run from
toolbar or press Shift+F10
 In the Run as Window that appears, select Android Application and click
OK.
 Android Studio installs the app on your device and starts it.

Running our First Program on the Emulator
 In Android Studio, click Android Virtual Device Manager from the
toolbar.
 In the AVD panel click Create Virtual Device.
 Select the Category and the phone model and click Next.
 In Select Image window, select system image and click Next.
 In Configure AVD window fill in the details for the AVD. Give it a name,
orientation, etc. then click Finish.
 Open one of your project files from Android Studio and click Run from
toolbar or press Shift+F10
 In the Run as Window that appears, select Android Application and click
OK.

Directory Structure of Android Studio Project

End of Lecture
Thank You!
Questions?

Introduction to Android (in-short) - Itvedant, Thane | Mumbai | Navi Mumbai

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