Android Overview Android

What is Android?

What is Android?

  • Android is open source and Linux-based Operating System for mobile devices.
  • Android was developed by Open Handset Alliance led by Google and other companies.
  • A unified approach is offered by Android to application development for mobile devices. Developers need only develop for Android and the applications need to be run on different devices powered by Android.
  • The first beta version of the Android Software Development Kit (SDK) was released by Google in 2007 where as the first commercial version, Android 1.0, was released in September 2008.
  • On June 27, 2012, at the Google I/O conference, Google announced the next Android version, 4.1 Jelly Bean.
  • Jelly Bean is an incremental update, with the primary aim of improving the user interface, both in terms of functionality and performance.
  • The source code for Android is available under free and open source software licenses.
  • Google publishes most of the code under the Apache License version 2.0 and the rest, Linux kernel changes, under the GNU General Public License version 2.

Why Android?

Why Android?

Features of Android

Android is a powerful operating system competing with Apple 4GS and the following features are supported.

Sr.No.
Feature & Description
1
Beautiful UI
Android OS basic screen provides a beautiful and intuitive user interface.
2
Connectivity
GSM/EDGE, IDEN, CDMA, EV-DO, UMTS, Bluetooth, Wi-Fi, LTE, NFC and WiMAX.
3
Storage
SQLite, a lightweight relational database, is used for data storage purposes.
4
Media support
H.263, H.264, MPEG-4 SP, AMR, AMR-WB, AAC, HE-AAC, AAC 5.1, MP3, MIDI, Ogg Vorbis, WAV, JPEG, PNG, GIF, and BMP.
5
Messaging
SMS and MMS
6
Web browser
Based on the open-source WebKit layout engine, coupled with Chrome's V8 JavaScript engine supporting HTML5 and CSS3.
7
Multi-touch
Android has native support for multi-touch which was initially made available in handsets such as the HTC Hero.
8
Multi-tasking
User can jump from one task to another and same time various application can run simultaneously.
9
Resizable widgets
Widgets are resizable, so users can expand them to show more content or shrink them to save space.
10
Multi-Language
Supports single direction and bi-directional text.
11
GCM
Google Cloud Messaging (GCM) is a service that lets developers send short message data to their users on Android devices, without needing a proprietary sync solution.
12
Wi-Fi Direct
A technology that lets apps discover and pair directly, over a high-bandwidth peer-to-peer connection.
13
Android Beam
A popular NFC-based technology that lets users instantly share, just by touching two NFC-enabled phones together.

Android Applications

  • Android applications are developed in Java language using Android Software Development Kit.
  • Once Android applications are developed , they can be packaged easily and sold out.
  • These applications are sold through a store such as Google Play, SlideME, Opera Mobile Store, Mobango, F-droid and the Amazon Appstore.
  • Everyday more than 1 million new Android devices are activated worldwide.
  • It's the largest installed base of any mobile platform and growing fast.
  • Android powers hundreds of millions of mobile devices in more than 190 countries around the world.

Categories of Android applications

The top categories of the android applications in the market are:

Categories of Android applications

History of Android

The code names of android ranges from A to N currently, such as Aestro, Blender, Cupcake, Donut, Eclair, Froyo, Gingerbread, Honeycomb, Ice Cream Sandwitch, Jelly Bean, KitKat, Lollipop and Marshmallow.

History of Android

What is API level?

API Level is an integer value that uniquely identifies the framework API revision offered by a version of the Android platform.

Platform Version
API Level
VERSION_CODE
Android 6.0
23
MARSHMALLOW
Android 5.1
22
LOLLIPOP_MR1
Android 5.0
21
LOLLIPOP
Android 4.4W
20
KITKAT_WATCH
KitKat for Wearables Only
Android 4.4
19
KITKAT
Android 4.3
18
JELLY_BEAN_MR2
Android 4.2, 4.2.2
17
JELLY_BEAN_MR1
Android 4.1, 4.1.1
16
JELLY_BEAN
Android 4.0.3, 4.0.4
15
ICE_CREAM_SANDWICH_MR1
Android 4.0, 4.0.1, 4.0.2
14
ICE_CREAM_SANDWICH
Android 3.2
13
HONEYCOMB_MR2
Android 3.1.x
12
HONEYCOMB_MR1
Android 3.0.x
11
HONEYCOMB
Android 2.3.4
Android 2.3.3
10
GINGERBREAD_MR1
Android 2.3.2
Android 2.3.1
Android 2.3
9
GINGERBREAD
Android 2.2.x
8
FROYO
Android 2.1.x
7
ECLAIR_MR1
Android 2.0.1
6
ECLAIR_0_1
Android 2.0
5
ECLAIR
Android 1.6
4
DONUT
Android 1.5
3
CUPCAKE
Android 1.1
2
BASE_1_1
Android 1.0
1
BASE


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