If you want to start a good career in Android Development, this presentation gives you a basic introduction about Android, and how you can develop your very first Android Application.

1. Operating System & Software Development Kit

2. Overview
• Introduction to Android
• Architecture of Android
• Application Building Blocks
• Developing Android App
• Career Opportunities

3. Introduction

4. Introduction to Android
• Open Source Software Platform for Mobile Application
Development
• An Open Handset Alliance Project, acquired by Google, Inc. in 2005
• A Complete Stack – Operating System + Middleware + Applications
• Powered by Linux Operating System
• Developed using C/C++ , provide development using Java

5. Android Powered Devices
• Smart Phones
• Tablets
• Washing Machine
• Coffeemaker (“Appresso”)
• Watch
• Android Powered Microwave (MAID)
• Camera (Coolpix S800c)
• Gaming Console
• E-Bike (concept by Ford Motor Co.)
• Android Powered Headrest
• Ninja Robot (boxing robot)
• Android Powered Refrigerator
• Smart TV & Pocket TV
• Chevrolet Volt integrated with Android

6. Architecture

7. Architecture of Android
Applications
Application Framework
Libraries
Android Runtime
Linux Kernel
Android Runtime
Libraries
Linux Kernel
• Dalvik Virtual machine
Application Framework
Applications
C/C++ Libraries
• Work asfile (Hardware Abstraction Layer)
• .dex HAL
• API Interface application
Built in and User
Interface through Java
• Device Drivers Efficient
• Compact and
• Activity manager.apk files
Can install using
• Limited memory & Power
Handling User Interface
• memory management
• Content ->Phone-> .jar ->WeChat, Web Browser,
Providers
Example: .class Dialer, .dex
• .java
• 2D/3DAndroid or others
Graphics
Process Management
Hello
• Location Manager etc
• Core LibrariesBrowser Engine, SQLite
Media Acces,
Networking
•
Java Standard Edition

8. Application Building Blocks

9. Application Building Blocks
• Activity
• Intents
• Service
• Content Providers

10. Activities
• Corresponds to one UI Screen
• But they can be – faceless, floating window,
return a value

11. Intents
• Think intent as an object or description what you want DONE!
• Example- view, call, play etc.
• System matches intent with activity that can best provide the
service
• Activities and IntentRecievers describe what intent can service
Activity 1
Intent (says : I want to do this)
Activity 2

12. Services
• Components that run in a background
• Music player, download etc.

13. Content Providers
App 2
App 1
• Sharing of data across applications
• Address book, photo gallery
• Provide uniform API for:
Content Provider
(eg. address book)
• Query
• Delete, update & insert
App 3
App 4

14. Developing Android App

15. Android Software Development Kit (SDK)
• Java SDK (at least Java SDK 5)
• Android SDK
(http://developer.android.com/sdk/index.html)

16. Android SDK

17. Android Software Development Kit (SDK)
• Install the Java and set CLASSPATH and
PATH
• Unzip the downloaded Android SDK,
and run Eclipse (run as admin)

18. Android Application Life Cycle
onCreate()
onStart()
Starting
onRestart()
onStart()
onResume()
Running
onResume()
onSaveInstanceState()
onPause()
Paused
Stopped
onSaveInstanceState()
onStop()
onDestroy()
Destroyed
onDestroy()

19. What’s inside an App ?
Default
Activity
Libraries
Other
Default
Default
Activities
Activity
Activity
Service
Content
Android Manifest
Drawable
Layouts
Values
Assets

20. Android SDK Manager
Using this tool, we
can download the
required APIs &
Libraries, for
application.

21. Let’s start developing
•
•
•
•
Start Eclipse (ADT)
File -> new -> project
Select Android Application Project
Click next

22. • Enter Application Name
• HelloAndroid
• Enter Project Name
• HelloAndroid
• Enter Package Name
• com.example.helloandroid
• Minimum Required SDK
• API 10
• Target SDK : API 10
• Compile With: API 10
• Theme : none

23. Let’s start developing
• Choose all other options as default.
• Click next -> next -> next -> finish…..
• Now we are ready to Code and Develop

24. Let’s start developing
• MainActivity.java : for back-end programming
• Activity_main.xml : for designing layout (UI)
• Double Click the activity_main.xml
• Eclipse will show its
• Graphical layout : for drag-n-drop design
• Activity_main.xml : for code based design

26. Let’s start developing
• In this application, we want to bind an event to that button
• Whenever user click (or touch) that button, the text box
must display “Hello Android”
• We have designed our UI, and now its time for code in
java.

27. Let’s start developing
package com.example.helloandroid;
import android.os.Bundle;
import android.app.Activity;
import android.view.Menu;
import android.view.View;
import android.view.View.OnClickListener;
import android.widget.Button;
import android.widget.EditText;

28. public class MainActivity extends Activity implements OnClickListener {
private EditText txt;
private Button btn;
protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_main);
txt = (EditText) findViewById(R.id.editText1);
btn = (Button) findViewById(R.id.button1);
btn.setOnClickListener(this);
}
public void onClick(View v) {
txt.setText("Hello Android");
}
}

29. Running the Application
• We need to set an emulator to test on PC.
• In eclipse, click Android Virtual device Manager icon.
• It will popup a dialog box, that you can use to
create your emulator.
• In that dialog box, click new button to add an emulator.

31. Wowww!! We have done it!
Now its ready to launch
Press Ctrl + F11 to Run

33. Congratulations!
You create your very first App!
Now, its time to publish it to the world

34. Publishing Android App on Google Play Store
• https://play.google.com/apps/publish/signup/
• $25 (Rs. 1600 – 1700) one time fee, pay via Google Wallet

36. Upload APK file
• Find .apk of your project in bin
folder of your workspace
• Upload it using Screen Instructions
• Manage Pricing & Distribution
• Manage Store Listing
• Available for end-user, anywhere in
the world

37. Career Opportunities

38. Career in Android Development
• Salary
• Highest Salary Increases – 9% from 2012-2013
• 2012 : $85,000 - $1,22,500 , 2013 : $92,750 $1,33,500 (networkworld.com survey)
• Future Scope & Growth
• The more devices, the more software required, the more developer
required
• Get experience in Java & programming, help you to switch if you needed

39. Thanks!
-
Hemant Kumar Chapoliya
http://hemantchhapoliya.co.in