Android ppt
-
Upload
dharmdutt-gupta -
Category
Engineering
-
view
346 -
download
9
Transcript of Android ppt
androidOPERATING SYSTEM
A Training Report on:
Raj Kumar Goel Institute of Technology, GhaziabadDepartment of Computer Science and Engineering
- Created & Presented By
Dharmdutt Gupta
INDEX
INTRODUCTION
HISTORY OF ANDROID
FEATURES OF ANDROID OS
ANDROID ARCHITECTURE
EXECUTION ENVIRONMENT AND DALVIK VIRTUAL MACHINE
LIFE CYCLE OF ANDROID APPLICATION
DEVELOPMENT TOOL
CONCLUSION
REFERENCES
INTRODUCTION
A SOFTWARE PLATEFORM AND OPERATING SYSTEM FOR MOBILE DEVICES,
FULL PHONE SOFTWARE STACK INCLUDING APPLICATIONS,
BASED ON LINUX OPERATING SYSTEM,
DEVELOPED BY GOOGLE AND OPEN HANDSET ALLIANCES,
100% PURE JAVA CODE,
AN OPEN PLATEFORM FOR DEVELOPERS, USERS AND INDUSTRY.
HISTORY OF ANDROID
IN JULY, 2005, GOOGLE ACQUIRED ANDROID INC., A SMALL STARTUP COMPANY,
STARTED AS A MOBILE SOFTWARE DEVELOPMENT COMPANY ,
DEVELOPED A LINUX-BASED MOBILE DEVICE OS,
ON 5TH NOVEMBER 2007, THE OPEN HANDSET ALLIANCES FOUNDED, A CONSORTIUM OF SEVERAL COMPANIES
FIRST RELEASED IN 2008
FEATURES OF ANDRIOD OS
APPLICATION FRAMEWORK ENABLING REUSE AND REPLACEMENT OF COMPONENET,
DALVIK VIRTUAL MACHINE OPTIMIZED FOR MOBILE DEVICES,
INTEGRATED BROWSER BASED ON THE OPEN SOURCE WEB KIT ENGINE,
OPTIMIZED GRAPHICS- 2D AND 3D,
SQLITE FOR STRUCTURED DATA STORAGE,
MEDIA SUPPORT
GSM TELEPHONY, BLUETOOTH, EDGE, WI-FI 3G AND 4G,
CAMERA, GPS, COMPASS, ACCELEROMETER, GYROSCOPE ETC.,
RICH DEVELOPMENT ENVIRONMENT.
ANDROID ARCHITECTURE
EXECUTION ENVIRONMENT AND DALVIK VIRTUAL MACHINE
JAVA SOURCE DOCUMENTS
COMPILE JAVA
SOURCES USING
“JAVAC” JAVA “CLASS” DOCUMENTS
OUTPUT FROM COMPILATION
PROCESSTRANSLATE JAVA COMPILED CLASS FILES INTO “DEX”
FILES
EXECUTE UNDER THE
DALVIK VIRTUAL MACHINE
CONTINUE....
DALVIK VIRTUAL MACHINE
INTERPRETER OPTIMIZED FOR USE ON LOW POWERED, LOW MEMORY DEVICES LIKE PHONES,
DOES NOT MAKE USE OF JUST IN TIME (JIT) COMPILATION TO IMPROVE THE PERFORMANCE OF AN APPLICATION AT RUNTIME,
NOT A JAVA VIRTUAL MACHINE, IT USES ITS OWN BYTECODE FORMAT CALLED “DEX”,
ALLOWS BATTERY POWER TO BE BETTER-CONSERVED AT ALL DIFFERENT STAGES OF EXECUTION OF AN APPLICATION,
SINCE DALVIK USES THE JAVA PROGRAMMING LANGUAGE BUT NOT THE JAVA EXECUTION ENVIRONMENT (JVM), GOOGLE IS FREE TO DEVELOP ANDROID WITHOUT THE NEED TO LICENSE OR OBTAIN CERTIFICATION FROM SUN MICROSYSTEMS INC.
LIFE CYCLE OF ANDROID APPLICATIONACTIVITY
STARTS
onCreate()
onStart()
onResume()
onPause()
onStop()
ACTIVITY IS RUNNING
onDestroy()
ACTIVITY IS SHUTDOW
N
onRestart()
PROCESS IS KILLED
ANOTHER ACTIVITY COMES
INFRONT OF THE ACTIVITY
THE ACTIVITY COMES TO
THE FOREGROUN
DTHE
ACTIVITY IS NO
LONGER VISIBLE
USER NAVIGATE
S BACK TO
ACTIVITY
OTHER APPLICATIO
N NEED MEMORY
THE ACTIVITY
COMES TO THE
FOREGROUND
DEVELOPMENT TOOLS
ANDROID SDK INCLUDES A VARIETY OF CUSTOM TOOLS THAT HELP DEVELOP MOBILE APPLICATIONS ON THE ANDROID PLATFORM.
ANDROID EMULATOR,
ANDROID DEVELOPMENT TOOLS PLUGIN FOR THE ECLIPSE IDE,
DALVIK DEBUG MONITOR SERVICE (DDMS),
ANDROID DEBUG BRIDGE (ADB),
ANDROID ASSET PACKAGING TOOL (AAPT),
SQLITE3,
TRACE VIEW,
ACTIVITY CREATOR ETC.
CONCLUSION
ANDROID IS OPEN TO ALL: INDUSTRY, DEVELOPERS AND USERS,
PARTICIPATING IN MANY OF THE SUCCESSFUL OPEN SOURCE PROJECTS,
AIMS TO BE AS EASY TO BUILD FOR AS THE WEB,
GOOGLE ANDROID IS STEPPING INTO THE NEXT LEVEL OF MOBILE INTERNET.
ANDROID IS A TRULY OPEN, FREE DEVELOPMENT PLATFORM BASED ON LINUX AND OPEN SOURCE. HANDSET MAKERS CAN USE AND CUSTOMIZE THE PLATFORM WITHOUT PAYING A ROYALTY.
A COMPONENT-BASED ARCHITECTURE INSPIRED BY INTERNET MASH-UPS. PARTS OF ONE APPLICATION CAN BE USED IN ANOTHER IN WAYS NOT ORIGINALLY ENVISIONED BY THE DEVELOPER. CAN EVEN REPLACE BUILT-IN COMPONENTS WITH OWN IMPROVED VERSIONS. THIS WILL UNLEASH A NEW ROUND OF CREATIVITY IN THE MOBILE SPACE.
REFERENCES
WHITE PAPER FOR “A SPECTRUM WHITE PAPER: THOUGHTS ON GOOGLE ANDROID” FROM SPECTRUM DATA TECHNOLOGY. http://www.spectrumdt.com
http://code.google.com/android/ - GOOGLE ANDROID OFFICIAL WEBPAGE
http://www.openhandsetalliance.com/ - OPEN HANDSET ALLIANCE WEBPAGE
http://en.wikipedia.org/wiki/Android_(mobile_phone_platform) –WIKIPEDIA INFORMATION
http://googleblog.blogspot.com/ - OFFICIAL GOOGLE BLOG
THANK YOU