It is an open source and Linux-based Operating System for mobile devices such as smartphones and tablet computers.

• Symbian OS

• Windows Mobile

• Android

• iOS

It is the year when the first beta version of the Android Software Development Kit (SDK) was released by Google

• 2009

• 2007

• 2008

• 2012

It is the year when the first commercial version, Android 1.0, was released

• 2009

• 2007

• 2008

• 2012

The android version that was released at the Google I/O Conference on June 2012

• Ice Cream Sandwich

• Marshmallow

• Cupcake

• Jellybean

It is the bottom layer of the Android Architecture which provides some basic functionalities like process management, memory management and device management

• Applications

• Linux Kernel

• Application Framework

• Libraries

This section provides a key component called Dalvik Virtual Machine which is a kind of Java Virtual Machine specially designed and optimized for Android.

• Android Runtime

• Application

• Application Framework

• Libraries

It represents a single screen with a user interface that performs actions on the screen.

• Services

• Broadcast Receiver

• Content Provider

• Activity

It is a component that runs in the background to perform long running operations.

• Services

• Broadcast Receiver

• Content Provider

• Activity

This refers to view hierarchies that control screen format and appearance of the views.

• Intent

• Layout

• Resources

• Manifest

It refers to external elements, such as strings, constants and drawable pictures.

• Intent

• Layout

• Resources

• Manifest