Monday, July 4, 2016

Introduction to Android

Story of Android 

Android is a mobile operating system developed by Google (Previously by Open Handset Alliance), based on the Linux kernel and designed primarily for touchscreen mobile devices. It has been the best-selling OS on tablets and on smartphones since 2013, and has the largest installed base.
The source code for Android is available under free and open source software licenses.
Google provides major incremental upgrades to Android every six to nine months, with confectionery-themed names, which most devices are capable of receiving over the air. The latest major release is Android 6.0 "Marshmallow" and soon going to release Android 7.0 "Nougat".

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, Marshmallow and Nougat. Let's understand the android history in a sequence.
Version of Android, Learn Android, Learn Programming, Develpment, 2TechUp

Features of Android

Android is a powerful Operating System supporting a large number of applications in Smart Phones. These applications make life more comfortable and advanced for the users. Hardwares that support Android are mainly based on ARM architecture platform. Some of the current features and specifications of android are:

FeatureDescription
Beautiful UIAndroid OS basic screen provides a beautiful and intuitive user interface.
ConnectivityGSM/EDGE, IDEN, CDMA, EV-DO, UMTS, Bluetooth, Wi-Fi, LTE, NFC and WiMAX.
Storage
SQLite, a lightweight relational database, is used for data storage purposes.
Media supportH.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
MessagingSMS and MMS
Web browserBased on the open-source WebKit layout engine, coupled with Chrome's V8 JavaScript engine supporting HTML5 and CSS3.
Multi-touchAndroid has native support for multi-touch which was initially made available in handsets such as the HTC Hero.
Multi-taskingUser can jump from one task to another and same time various application can run simultaneously.
Resizable widgetsWidgets are resizable, so users can expand them to show more content or shrink them to save space
Multi-LanguageSupports single direction and bi-directional text.
GCMGoogle 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.
Wi-Fi DirectA technology that lets apps discover and pair directly, over a high-bandwidth peer-to-peer connection.
Android BeamA popular NFC-based technology that lets users instantly share, just by touching two NFC-enabled phones together.

API Levels in Android

API Level is an integer value that uniquely identifies the framework (different versions of Android). For example API Level of Marshmallow is 23, API Level of Lollipop 5.1 is 22 and of Lollipop 5.0 is 21.

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