The name Android has become the most revolutionary invention in mobile industry. It is the only mobile platform that spread all over the world in very limited time period with vast improvement. In present day every customer willing to buy a mobile phone with Android OS to feel the real experience in modern mobile technology. 

Android is an open source Linux based mobile operating system which specially designed for touch screen mobile devices such as tablets, smart phones and media Pads. Google releases this code under Apache License and the most attractive thing is open source code and permissive licensing allows the software to be freely modified and distributed by device manufacturers, wireless carriers and enthusiast developers. Android has become the world’s most widely used mobile platform and it has the 75% of smart phone market share during the 3rd quarter of 2012 with 500 million devices. 

Android platform is able to create its own market for developers to write applications and also extend the functionalities and services for the device manufacturers. For mobile users the experience with Android is smarter than any other platform they had their experience. Google applications and more than 600000 applications are available for users which developed by various developers from every corner of the world. Luckily most of them are for FREE. 

Android applications are developed in JAVA language using Android Software Development Kit. The official IDE for Android application development is Eclipse and also there are several other Development Tools. Eclipse can use with Android Development Tools (ADT) plug-in and SDK includes a comprehensive set of development tools,] including a debugger, software libraries, a handset emulator based on Quick Emulator (QEMU), documentation, sample code, and tutorials.

 Android System Architecture