Patel Dilip A. (110403107014)

Modh Dhruv N. (110403107016)

B.E. 5th Sem CE-1

Computer Department

Sankalchand Patel college of Engineering

Android is a software stack for mobile devices that includes an operating system, middleware and key applications. 

Abstract...

Android is a software platform and operating system for mobile devices based on the Linux operating system and developed by Google and the Open Handset Alliance. It allows developers to write managed code in a Java-like language that utilizes Google-developed Java libraries, but does not support programs developed in native code.

The unveiling of the Android platform on 5 November 2007 was announced with the founding of the Open Handset Alliance, a consortium of 34 hardware ,software and telecom companies devoted to advancing open standards for mobile devices.

Contents...

Open Handset Alliance

Introduction To Android

Why Android Was Created?

Android Architecture

Development Tools

Conclusion

Open Handset Alliance…

The Open Handset Alliance (OHA) is a business alliance that was created for the purpose of developing open mobile device standards. The OHA has approximately 80 member companies, including HTC, Samsung, Intel, Motorola, Qualcomm and Google. The OHA's main product is the Android platform - the world's most popular Smartphone platform

Introduction to Android…

A complete & modern embedded operating system.

A world-class software stack for building applications.

An open platform for developers, users &industry.

Why Android Was Created?

For full phone software stack including applications.

Designed as a platform for software development.

Communities Support.

100% Java Phone.

For better Security.

We can reduce redundancy.

Architecture

Linux Kernel

Android relies on Linux kernel 2.6 for core system Services such as security, memory management, process management, network management, and driver model.

The kernel is also acts as an abstraction layer between the hardware and the rest of the software stack.

Runtime

Every android application runs in its on process, with its own Dalvik virtual machine.

Dalvik has been written so that device can run multiple VM s efficiently. In java we are using JVM but here DVM.

Dalvik VM takes the generated Java class files and combines them into one or more Dalvik Executable (.dex) files. It reuses duplicate information from multiple class files, effectively reducing the space requirement (uncompressed) by half from a traditional .jar file.

Libraries Libc : c standard lib.

WebKit : Kernel of web browser

SQLite : Embedded database

Media Framework: Core part of Android multi-media

OpenGL | ES: 3D image engine

SGL: 2D image engine

SufraceManager: Manage difference windows for different applications

FreeType: Bitmap and Vector

Application Framework

Activity Manager: Interact with the overall activities running in the system.

Content Provider: A content provider is only required if you need to share data

between multiple applications.

Notification manager: Class to notify the user of events that happen. This is how

you tell the user that something has happened in the background.

Package Manager: Class for retrieving various kinds of information related to the

application packages that are currently installed on the device.

Telephony Service:Provides access to information about the telephony services on

the device. 

Window Manager: The interface that apps use to talk to the window manager.

Location Manager :This class provides access to the system location services. 

Any Questions????