SL4A - Android Overview

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Android is a Linux based operating system, designed primarily for portable devices like smartphones and tablet. Android is more than an operating system. It is a software stack that provides many features for users, developers and manufacturers.

Android Version Features
Android (Alpha) 1.0 First version of Android
Android 1.5 (Cupcake) Added auto-rotation option, copy and paste feature added in the web browser
Android 1.6 (Donut) Voice search and Search box were added
Android 2.0/2.1 (Éclair) Bluetooth 2.1 support
Android 2.2/2.2.3(Froyo) Support for Adobe Flash 10.1
Android 2.3/2.3.7 (Gingerbread) Internet calling, one touch word selection and copy/paste
Android 3.0/3.2.6 (Honeycomb) This version is available only for tablets.Features include support for multi-core processors, ability to encrypt all user data
Android 4.0/4.0.4 (Ice cream sandwich) Virtual button in the UI, ability to shut down apps that are using data in the background
Android 4.1/4.3.1 (Jelly Bean) Based on Linux Kernel 3.0.31? Smoother User Interface, Bluetooth data transfer for Android Beam
Android 4.4/4.4.4,4.4W/4.4W.2 (KitKat) Integration with cloud storage, Built-In sensors, Lock Art Screen
Android 5.0/5.1.1 (Lollipop) Improved RAM and Battery Management, Fixes for sudden App closure, issues with wireless connections, notifications etc.

It is open source and business friendly. The user can choose to replace built-in applications with applications of their choice. Many versions of Android have been released since its original release.

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