Android_Workshop

Android Workshop
&
Motivation
Senthil ACS
Welcome All !

Three Things
Engineering
Android
JOB !!! 

“It is an art of making things
that benefit people”

Engineering
Innovative & Creative
Design
Develop
Deliver
Maintain Quality
Self Motivation – Most important

Why Self Motivation?
Motivation drives your growth
Beneficiaries – You and your organization
Today’s Motivation – Android
Helps you get a job !

Don’t Ignore
Theoretical Knowledge – Very Important
Mathematics
Data Structures & Algorithms
C Language, OOP
Engineering Ethics

No!
It is NOT an
Operating System !

What is Android?
An open source software stack build on top of Linux
Layered Architecture like any typical Operating System

Android Development
Third party app development
Our agenda
Ability to monetize apps
http://developer.android.com
Native Platform development
Mobile Phone makers (HTC, Samsung, Motorola)
Genuine geeks
Cannot monetize
http://source.android.com

Android Development
Languages in Android
Java
C, C++
Hybrid using JNI [Java Native Interface]

Android SDK
Started – Cupcake (1.5)
Current – Kit Kat(4.4.2)
Specialty – Works on low memory models
Your requirements
Windows/Linux/Mac
Android SDK – Free from http://developer.android.com

I do…
Listen when the bell rings to Start, Stop
Think of the answer
Write the answer
Remember that I have written the answer

Android Correlation
Listen when the bell rings to Start, Stop
Broadcast Receivers
Think of the answer
Services
Write the answer
Activity
Remember that I have written the answer
Storage

Android SDK
It is a ZIP file ~ 500 MB
Extract it to some location
Open <SDK>eclipseeclipse.exe
Opens up ADT (Android Development Tools)

Simple Application
Use Android ADT
File -> New-> Android Application Project
Provide App Name
Finish
You are DONE !!

App Components
Source
Resources
Drawables (various screen sizes)
Layout (various screen sizes)
Strings (various languages)
Manifest
Contains all activities, services, providers, receivers,
permissions required by the application

Concepts Revisited..
UI (Activity)
Background Worker (Service)
App Storage (Shared Prefs, Internal/External Storage,
Content Providers)
Change Listeners (Broadcast Receiver)

Android Activity
Foreground concept
A UI window containing various views (Button,
TextView, Label etc) – Similar to Java Swings
View elements may listen for user actions
An application can have various activities
One can start another (Opening one window from
another window) – Using startActivity(intent)

Launcher Activity
The activity that shows up when the app is launched
Manifest changes
<activity android:name=".ExampleActivity"
android:icon="@drawable/app_icon">
<intent-filter>
<action android:name="android.intent.action.MAIN" />
<category android:name="android.intent.category.LAUNCHER" />
</intent-filter>
</activity>

Services
To run in background & no UI
Types - Started Services, Bound Services
Started Services
Owned by the application
Typically started by an activity
Bound Services
Owned by the application
Shared by others – Binder

Invoking a Service
startService()
Code to start a service
Intent intent = new Intent(this, HelloService.class);
startService(intent);
onStartCommand()
bindService()
onBind()
Requires an Intent action/Service class name

Started Service
Intent Service
Offloads to a Worker Thread
Provides a Work Queue
Stops the service once work is done
Less code
Normal Service
Manually create background thread
Multi threaded work
More code

Application Storage
Shared Preferences
User’s settings
Key-Value Pairs
Internal Storage
App’s private data
Cannot be accessed by other apps
External Storage
Public data
Typically sdcard

Content Providers
http://, ftp://, smtp://, isbn://
Content is categorized and is provided access

Content Providers
content://
SQLite databases
Efficient data access
Can be accessed by other apps (Controllable)
Example: content://com.android.contacts/friends

Content Providers
Contacts
Browser History
SMS Inbox
Images
Songs
Videos

Broadcast Receivers
Hey Friend! Inform us when the results are out!!
Above statement – Registration
You – Listener
Your Friend – Broadcaster
“When the results are out” – Intent

Broadcast Receivers
Register for event notifications
Signal Change Notification
On boot complete Notification
Battery Notification
Location Change Notification
Etc…
Communicate results from one app to other/others

Broadcast Receivers
Registration
Permanent
Register in Manifest
Example: onBootComplete
On/Off
Register/Unregister when required
Example: Location Change Notification

Intent & Intent Filter
Intent – The intention behind doing something
Pass Data - Used in Services example
Intent Filter – What are my intentions?
What to listen for - Used in Broadcast receivers

Android Permissions
Declared in Manifest
Required if your app uses Android sensitive infrastructure
Read/Write contacts
Read Network State
Read/Write External Storage (App Storage)
OnBootComplete
Etc…

Benefits of learning Android
Massive market share (>80%) of global smartphone
share.
Samsung, Motorola, Sony, LG, HTC are major players
Play Store – 1 million apps
Get a fundoo job
Monetize your application

IT Slow Down
Not really
IT slow down – Services Company
Outsourcing problems
Indian Rupee depreciation
Product Companies still doing good

JOB !!!
Show your marks and answer simple Questions
Learn Android + One app in PlayStore
Data Structures + Algorithms + 1 Mobile Platform

JOB !!!
Show your marks and answer simple questions – Indian
Services Companies
Infosys, Wipro, HCL, CTS, TCS
Android – Good Product Companies
Zomato, Zynga, SAP, Ericsson
Data Structures + Algorithms + 1 Mobile Platform –
Premium Product Companies
Google, Yahoo, Microsoft, Akamai

What Now !!!
Students
Pick up Android SDK and use the developer link to kick start
Develop small apps and relish 
Find an idea, develop it and put it in playstore.
25$ to put in PlayStore

What Now !!!
College
Get a Google Play Store account
Motivate students to develop more mobile apps
Let the students place their apps after thorough review
Benefits
Better job opportunities for students
Better brand image for the college
Increased technological competency

Android_Workshop

More Related Content

What's hot (20)

Viewers also liked (10)

Similar to Android_Workshop (20)

Android_Workshop