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


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