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Android and android versions

Android is an open-source operating system developed by Google and the Open Handset Alliance. It allows developers to write managed code in Java and uses the Linux kernel. The first commercial version was released in 2008 and it has seen ongoing updates. Android is optimized for mobile devices and enables component reuse, replacement and multitasking. The software stack includes applications, an application framework, the Linux kernel, libraries and the Android runtime which includes the Dalvik Virtual Machine. Future versions aim to overcome limitations and expand possibilities.

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ANDROID AND ANDROID PHONES
Contents History of Android Introduction of Android What is Open Handset Alliance Android versions History of Android OS Features of Android Android architecture Android apps Drawbacks Conclusion
HISTORY OF ANDROID The version history of the Android mobile operating system began with the release of the Android beta in November 2007.  The first commercial version, Android 1.0, was released in September 2008.  Android is under ongoing development by Google and the Open Handset Alliance (OHA), and has seen a number of updates to its base operating system since its initial release.
WHAT IS ANDROID? • The name "Android" comes from the term android, which refers to a robot designed to look and act like a human. • It is a open source software platform and operating system for mobile devices • Based on the Linux kernel • Developed by Google and later the Open Handset Alliance (OHA) Allows writing managed code in the Java language • Android has its own virtual machine i.e. DVM(Dalvik Virtual Machine),which is used for executing the android application. • Google purchased the initial developer of the software , android incorporated in 2005.
FEATURES OF ANDROID Background Wi-Fi location still runs even when Wi-Fi is turned off Developer logging and analyzing enhancements It is optimized for mobile devices. It enables reuse and replacement of components. Java support ,media support, multi touch, video calling,multi tasking ,voice based features, screen capture, camera ,bluetooth,gps,compass and accelerometer,3G
ANDROID ARCHITECTURE The software stack is split into These Layers:: • The application layer • The application framework • Lunix kernel • Libraries • Android run time
APPLICATION LAYER  Top most layer in android system. Include home application and native application. Works with the help of application framework to operate.
Application Framework  2nd topmost component of android system. Written in Java Programming Language.  All apps directly interact with application framework.
LINUX KERNEL  Bottom layer of android system.  Based on lunix 2.6 kernel.  Core of android architecture.  Helps in software or hardware binding for better communication.
Libraries  This layer is top of lunix kernel.  Provide different libraries useful for well functioning of android.  Java libraries build for android system.
Android run time  Third layer of android system.  Provide most important part of android – DALVIK VIRTUAL MACHINE.  DVM uses the core function of lunix.
CONCLUSION We hope that the next versions of Android have overcome the actual limitations and that the future possibilities became a reality and may this software is also developed to use in PC’s also.
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