android presentation
TRANSCRIPT
I am
Open Source
http://www.android.com/
I am Android
What is Android?• Android is an Operating system and platform for mobile devices
• We can write different apps to run on mobile phones
• Android is Lightweight and full featured
• Android is an Open Source Product, we can download SDK free
• Android is under version 3 of the Apache Software License (ASL)
• A SDK is available to build, compile, test and debug user applications
• Mostly open sourced under the Apache and other open source licenses
• Android is developed by Google and later the Open Handset Alliance
(OHA)
• Allows writing managed code in the Java language
• Good framework based on Java
Android is based of Linux Kernel 2.6 but Android is not Linux
What is the OHA?
• OHA stands for Open Handset Alliance.
• (OHA) is a business alliance of 84 firms to develop open standards for mobile
devices.
• The OHA was established on 5 November 2007, led by Google with 34 members
• It's a consortium of several companies
(84 Firms of OHA)
Android Features
• Provides us SDK for developing Applications
• Runs on Dalvik virtual machine
• Video and audio codecs
• Bluetooth 3G, and WiFi, Camera
• Integrated browser based on the open source WebKit engine
• Optimized graphics powered by a custom 2D graphics library; 3D graphics based
• SQLite for structured data storage
• Media support for common audio, video, and still image formats (MPEG4, H.264,
• MP3, AAC, AMR, JPG, PNG, GIF)
• GSM Telephony (hardware dependent)
Versions of Android
Ice Cream SandwichAndroid 4.0
HoneycombAndroid 3.0
GingerbreadAndroid 2.3
Android 2.2Android 2.2
ÉclairAndroid 2.1
DonutAndroid 1.6
CupcakeAndroid 1.5
CodenamePlatform
History of Android
• Android Inc, was founded in Palo Alto, California, United States
• Developed by Andy Rubin, Rich Miner, Nick Sears and Cris White - October 2003
• Google acquired Android Inc. August 2005
• The Open Handset Allience, a consortium of several companies was formed-
November 2007
• Android Beta SDK Realeased November 2007
Android 1.0
• The Android 1.0 was launched in 23 September 2008
• The first Android device, the HTC Dream(G1), featuring Android 1.0. Integrated with Google Services
• Web browser to show, zoom and full HTML and XHTML WebPages, multiple pages show as windows
• Android Market app downloads and updates
• Multitasking, Instant Messaging, Wifi and Bluetooth
Android 1.5(Cupcake)
• The Cupcake was launched in 30 April 2009
• Based on Linux Kernel 2.6.27 • Faster Camera start up and image capture• Much faster GPS• Onscreen Soft Keyboard• Directly uploads videos to Youtube and
Picasa
Android 1.6(Donut)
• The Donut was launched in 15 September 2009
• Based on Linux Kernel 2.6.29 - Quick Search box and Voice Search
• Integrated camera, camcorder and gallary, toggle between still and video capture modes
• Battery usage indicator• CDMA support• Multilingual text-to-speech function
Android 2.0(Eclair)
• The Éclair was launched in 26 October 2009
• Multiple Accounts for email and contact synchronization
• Bluetooth 2.1 Support• New browser User-interface and
support for HTML5• New calendar features
Android 2.2(Froyo)
• Based on Linux Kernel 2.6.32• The Froyo was launched in 20 May,2010• New tips widget for home screen• Improve exchange support• Hotspot Support• Multiple keyboard language• Adobe Flash 10.1.
Android 2.3(Gingerbread )
• Gingerbread was launched in 6, December 2010
• UI refinements for simplicity and speed• New keyboard for faster text input• One-touch word selection and
copy/paste• Internet Calling
Android 3.0(Honeycomb) - 10 May 2011• Honeycomb was launched in 10 May
2011 • Specially optimized for tablets and
devices with larger screen sizes• Refined multitasking, rich notifications,
home screen customizations widgets • Bluetooth tethering• Built-in support for Media/Picture
Transfer Protocol
Android Version Distribution( As On July 5,2011 )
Android Architecture
Where the Android Stands in Market Survey (March,2011)
What is Dalvik? • Custom VM implementation
• Provides application portability
• Run optimized file format (.dex)
• Java .class / .jar converted to .dex at build time
• Support multi processes per VM
• Uses its own bytecode, not Java bytecode.
• Optimized for mobile devices
• Relies on the underlying OS for process separation, memory management and
threading
• Designed to run multiple VM instances efficiently
• Executes its own type of byte code in files created from Java class files
Advantages of Android
• The ability for anyone to customize the Google Android platform
• The consumer will benefit from having a wide range of mobile applications to
choose from since the monopoly will be broken by Google Android
• Men will be able to customize a mobile phones using Google Android platform
like never before
• Features like weather details, opening screen, live RSS feeds and even the
icons on the opening screen will be able to be customized
• In addition the entertainment functionalities will be taken a much higher by
Google Android being able to offer online real time multiplayer games
Security In Android
• Applications are signed with a certificate
• Applications run in their own process with a unique user id
• Permissions restrict access to the data on the device
• Permissions granted by user on installation of application
• Permissions that application need and declaration of custom
permissions is done in the application manifest file
Android Libraries• Most of the Android Libraries are created in C and C++
• System C library - A BSD-derived implementation of the standard C system
library (libc), tuned for embedded Linux-based devices
• Media Libraries - based on PacketVideo's OpenCORE; the libraries support
playback and recording of many popular audio and video formats, as well as
static image files, including MPEG4, H.264, MP3, AAC, AMR, JPG, and PNG
• Surface Manager - Manages access to the display subsystem and seamlessly
composites 2D and 3D graphic layers from multiple applications
Android Libraries• LibWebCore - A modern web browser engine which powers both the
Android browser and an embeddable web view
• SGL - The underlying 2D graphics engine
• 3D libraries - An implementation based on OpenGL ES 1.0 APIs; the
libraries use either hardware 3D acceleration (where available) or the
included, highly optimized 3D software rasterizer
• FreeType - Bitmap and vector font rendering
• SQLite - A powerful and lightweight relational database engine
available to all applications
System Requirement for Developing Android Application
We need following things for developing the android applications:
• Java (http://www.java.com/en/download/index.jsp)
• Android SDK (http://developer.android.com/sdk/index.html)
• Eclipse IDE (http://www.eclipse.org/downloads/)
Questions
Thank you for your Time and Attention!
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