Handheld Device Open Source Operating System

By Shraddha ShelarDYP

Android Operating System: • Linux Based Open Source operating system

for Smart phones, tablets.• Invented By OHA: Open Handheld Alliance.• Google Announced initial version of Android

Software Development.• Android has its own Virtual machine called

DVM(Dalvik Virtual Machine)

OHA: Open Handset Alliances:• It is the business alliance firm to develop a

standard mobile device.

Wireless Application Protocol:

Android Versions:

Android Versions: •Android 1.0(Angel Cake): 2008•Android 1.1(Battenberg): Feb 2009•Android 1.5(Cupcake): April 2009•Android 1.6(Donut): Sept 2009•Android 2.0/2.1(Eclair):Oct 2009•Android 2.2-2.3(froyo) :2010•Android 2.3-2.3.7): end 2010•Android 3.0-3.2.6(Honeycomb):2011•Android 4.0-4.0.4(Ice-Cream Sandwich):2012•Android 4.1-4.3.1)2013•Android 4.4-4.4.4(Kitkat)Sept 2013•Android 5.0(Lollipop):nov 2014•Now, Which one is the Latest version ?????????

Android Architecture:

Architecture Conti….1. Linux Kernel: It works as HAL(Hardware Abstraction

Layer), Network Management, Device Driver, Process Management

2. Libraries: C/C++ Libraries, Interface Through Java, Surface manager, Graphics, Media Codes, SQLite, Browser Engine

3. Android Runtime: i.Dalvik VM: Dex File, Compact and efficient than class files, Limited Memory and battery power. ii. Core Libraries: Java , Collection of I/O 4. Application Framework: It gives the higher level services

in the form of java classes5. Application.

Advantage of Android:

Dis-Advantages:

Android Application Support:

Life Cycle of Android Activity:

• OnCreate();• onStart();• onResume();• onPause();• OnStop();• onDistroy();• onRestart();

Future of Android:

Conclusion:

• Android is doing progressive development so fast and hence we hope that next version of android will actually overcome all the limitations of it.