Android Introduction

Android is a Linux based operating system for mobiles such as smart mobiles and tablets.

It was developed by OHA.

Android Incorporation is a small company established in 2003 at California.

This company is acquired by the google in 2005.

Google formed a group  “Open Hanset Alliance” in 2007.

To develop open standards for mobile devices , in this group 40+ companies joined.

The group contains Mobile Manufaturing companies, network companies, Mobile operators, semi conductor companies joined.

Definition of Android:

Android is a software stack comprising not only operating system but also middleware( the programming allows applications to talk to a network) and applications.

Features of Android:

Android Os supports Camera, Bluetooth, compass and Accelerometer, Wifi.

Runtime environment is Dalvik Virtual Machine. It is a register based Virtual Machine.

Integrated browser based on Webkit engine.

Sqlite for storing the data.

Support for GSM, CDMA technologies.

Versions:

Versions	Name	API level
Android	Apple Pie	1
Android	Banana Bread	2
Android    1.5	Cupcake	3
Android    1.6	Donut	4
Android    2.1	Eclair	7
Android    2.2	Froyo	8
Android 2.3 to 2.3.2	Gingerbread	9
Android 2.3.3 to 2.3.7	Gingerbread	10
Android 3.0	Honeycomb	11
Android 3.1	Honeycomb	12
Android 3.2	Honeycomb	13
Android 4.0-4.0.2	Ice Cream Sand witch	14
Android 4.0.3 to 4.0.4	Ice Cream Sand witch	15
Android 4.1	Jelly Bean	16