AN4430 datasheet(8/42 Pages) STMICROELECTRONICS

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Android Application Overview

AN4430

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DocID025722 Rev 1

Android Application Overview

1.1

About Android Operating System

“Android is an operating system based on the Linux kernel, and designed primarily for

touchscreen mobile devices such as smartphones and tablet computers. Initially developed

by Android, Inc., which Google backed financially and later bought in 2005, Android was

unveiled in 2007 along with the founding of the Open Handset Alliance: a consortium of

hardware, software, and telecommunication companies devoted to advancing open

standards for mobile devices. The first publicly available smartphone running Android, the

HTC Dream, was released on October 22, 2008.”(a)

1.2

Android System: Component architecture view

1.2.1

Android architecture overview

Basically android has the following layers (see Figure 1)

•

Application written in java executing in Dalvik – (the aim of the current application note)

•

Framework services and libraries written mostly in java

•

Native library, daemons and services written in C or C++

•

The Linux kernel which includes as every operating system:

–

Drivers for hardware,

–

Networking,

–

File system

–

Inter-process-communication

a. Definition from Wikipedia

AN4430 Datasheet(PDF) 8 Page - STMicroelectronics