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AN4430

Android Application Overview

Figure 1. Android diagram

NFC features can easily be mapped on this architecture.

NFC phone has to be NFC capable with an HW NFC chips controlled by a NFC driver

provided by the chip constructor. This driver is running in the Linux kernel with super user

rights. Upon this driver a NFC stack also provided by the chip constructor or by the phone

constructor located in libraries layers ensures interfacing between driver low level layer and

android stack which implements the android API in application framework and more

specifically the NFC Android API overviewed later on in this application note.

1.2.2

Android API

Android API is the upper software layer exposed to the developer. This API is based on the

core Java APIs and consists of a set of packages defining classes that ease the use of

android feature and the device components. This API is built with multiple packages like:

•

Widget – UI components,

•

Telephony – cell network, call, GSM, CDMA

•

Media – audio, video

•

Content – content providers,

•

Database – SQLLite

•

XML – SAX, pull parser

•

Hardware – camera, sensor, usb, nfc

•

As Android is in constant development phase, packages are still improved by the android

consortium, new features are added. Therefore, as some feature appears, API version

AN4430 Scheda tecnica(PDF) 9 Page - STMicroelectronics