An Introduction for Android Application Development for those who are new to the world of application development. It will be helpful, just go though once.

1. By-
SitCom Solutions
AN INTRODUCTION
TO
ANDROID APP
DEVOLOPMENT

2. Overview
• What we will cover ?
 What is android?
 Setting up Development Environment
 Project Structure
 Activity
 UI and Layouts
 Services
 Broadcast Receivers
 Deployment 1st Phase

3. Introduction
 Android Background
 Android Architecture
 Android Applications
 APIs
 Security and Permissions
 The Android Market

4. Android Background
• Mobile Operating System developed by Android Inc
 Google bought in 2005
• Based on Linux Kernel
• Open Source
• Built on Idea of being open
 All applications are equal
 Everything is swappable
• Application Layer is Java
• Has built in Google Market for Applications
• The first commercially available Smartphone running
Android was the HTC Dream, released on October 22,
2008
• Source Code released under Open Source

5. Android Background
• Supports a multitude of
devices
• Growth Rate since it
entered into mobile world

6. Android Architecture

7. Android Architecture
• Linux Kernel
• Libraries

8. Android Architecture
• Application Framework
• Applications

9. Android Applications
• Loosely coupled set of Service
• Contains
• Activities
• Services
• Broadcast Receivers
• Content Provider
• Can use other applications if
required
• Written in Java.
• Implements the “principle of least privilege”

10. APIs
• Android API level corresponds to particular Android OS
version
Other APIs
Location
Services
Telephony
Google Maps
Audio and
Video

11. Security and Permissions
• Each application is provided a unique Linux User ID
• Each App lives in its Security Sandbox
• Each App has access to privileges required by it
• Apps needs to take permissions to access end user
facilities required by an application
• Applications can share resources and data through
Intents.

12. The Android Market
•Direct access from phone
and web
•Open
•No approval
•Not Policed
•Other markets also
available
•Cost
•One time 25$ fees to
be an android
developer
•30% of cost at which
application is sold

13. Setting Up Development
Environment
• You can develop on different OS using different IDE’s.

14. Setting Up Development
Environment
• Long Way so First things first
• IDE
• Download an IDE say Eclipse
• Go to www.Eclipse.org and select download
for Java environment
• Extract it to a folder in C: with a name of
your choice
• JDK and JRE
• Download Java Development Kit and Java
Runtime Environment
• Install and Create Environment variables for
java compilation.

15. Setting Up Development
Environment
• Download Android SDK
• Go to
http://developer.android.com/sdk/installing/i
ndex.html
• Run SDK manager from root folder and install
all packages you require to develop for.

16. • Download and install ADT fro IDE here Eclipse
• Open Eclipse-> Click on Help-> Click on Install
new Software
• On next popup Window click on->ADD
• Type a name Android and URL-
https://dlssl.google.com/android/eclipse/
• On next window select all to install and click-
>Next
• Configure ADT
• Click on Window->Preferences
• Now select Android from Left Panel and browse
sdk location from right to place where you
downloaded android sdk.
Setting Up Development
Environment

17. Let’s Create an Android Project
• To do this Open Eclipse or your IDE and click on File-
>New->Other/Android Project
• If Other than select from popup window Android
Project

18. Let’s Create an Android Project
• Next select activity for your app and an icon.

19. First Page

20. Project Structure

21. Android Manifest File
• Must be available to all apps in root directory.
• Describes all Components of an Application
• Activities
• Permissions
• Services
• Data
• Intent Filter
• Application
• SDK version
• And many more to explore

22. Activities
• Backbone
• Main Entrance when started is Main Activity
• Sub Class of Activity class
• Activity state preserved in “Back Stack”

23. Activities Lifecycle

24. Activities -What we can do with
it?
• Create Views
• Get and Update Views
• Respond to View Events using “Intents”
• Create and Launch Activities
• Save Activity State
• Control how our Application responds.
• We can add “Fragments” to Activities.

25. Views and Layouts ! What are
these?
• Everything in android UI is a View because-
• View is an overloaded word
• Layouts
• Android Widgets
• UI
• Pass object to Activity and
it draws for us
• View Object
• XML Layout File

26. Layouts
• XML representation of View Objects
• Are typically ViewGroups
• Linear Layout
• Relative Layout
• Table Layout
• Absolute Layout
• Other Layouts
• List Views
• Grid Views
• Tab View
• And lot more to Explore

27. Services
• Runs in background, No UI
• Two Types
• Bound (runs till activity lives)
• Unbound (runs indefinitely)
• Service Lifecycle

28. Broadcast Receivers
• Responds to System Wide Broadcast announcements
• Can be
• Static
• Dynamic
• Some System Broadcasts are
• Low Battery notification
• Memory Full etc.

29. Deployment
• Sign your Application with your Private key
• Right Click on Project
• Go to Android Tools->Export Signed Application
• Fill the details
• Obfuscate with Proguard
• In order to diminish the misuse of your code use it.
• Open Source Java Tool in ADT
• Prevents code to be meaningfully Decompiled.
• Just add a line in default.properties
• Proguard.Config=proguard.cfg
• Export from Eclipse or other IDE
• And you are with a “.apk” file.