Java Mobile Application

sms,sim,mms and barcode application

Presented byAyedh(SIM

and MMS)Asad(SMS and

Barcode Application)

Introduction All network accesses in MIDP devices work

through Generic Connection Framework. According to MIDP 2.0 specification devices

must support HTTP and HTTPS connections. It promises any mobile application to be done

more securely connected to the Internet.

Different components of connections There is a one class connector and 7

connection Interfaces

http://www.j2medev.com/api/midp/javax/microedition/io/package-tree.html

GSM Cell broadcast overview

Making a connection Pass a connection string(URLs with a

protocol,network address and optional parameter) to one of the Connector’s open method.

Connection is not useful by itself,so you must cast the return value..

HttpConnection hc=(HttpConnection)Connector.open(url);

It hands you back some connection implementation.

You can use that to get input and output stream.

Clean upprivate void loadBytes(String url) throws IOException{HttpConnection hc =(HttpConnection)Connector.open(url);

try{

InputStream in=hc.openInputStream();try{

//read data from in.}

finally{in.close();}

}

finally{hc.close()}

}

SMS SMS and MMS are most popular facilities since

the advent of 2G mobile telephony Wireless Messaging API is a bridge

between the MIDlets and the text and Multi Media Messaging

Java ME supports short text ,binary and multipart message on the wireless messaging API

Jsr205 is the wireless messaging API 2.0 which adds support for multi media message service and replaces the early API jsr120.

Why messaging SMS and SMS are travelled through store-

and-forward network, which means messages are not lost even if the destination is not available.

They don’t involve a server. you can easily communicate between applications running on different devices with no server side programming.

Commercial values Value of SMS per year around the world? $100 bn How big is that? Take all of hollywood

movie box office revenues worldwide. Add all of the global music industry revenues. And add all of videogaming revenues around the world. Even all those three together, we don't reach 100 billion.

SMS reaches 3bn people - 2x more than TV, 3x more than internet

Steps for sending a message

public void sendText(String address,String text){String cs=“sms://”+address+”:50000”;MessageConnection

mc=(MessageConnection)Connector.open(cs);TextMessage

tm=(TextMessage)mc.newMessage(MessageConnection.TEXT_MESSAGE);

tm.setPayloadText(text);mc.send(tm);}

contd……

Steps…… Obtain MessageConnection from

Connector Get a new message from

MessageConnection calling newMessage(); Fill up the message.Here in the example

setPayloadText() is specific to a Textmessage.

Send the message by passing it to the MessageConnection’s send() method.

Receiving a messageMessageConnection c;C=(MessageConnection)Connector.open(“sms://

50000”);Message msg=c.receive();If(msg instanceof TextMessage)msg{//handle message}

Two ways to receive message Create a thread that loops on calling

MessageConnection’s receive() method. Secondly by using MessageListener.You

supply the listener and register with the MessageConnection.Whenever the message arrives ,listener’s notifyIncomingMessage() is called.Then you call the receive() method knowing that a message is waiting.MessageConnection gives you a message.

Barcode ApplicationIt is an emerging technology.

User can scan the bar code and almost immediately user will get the product details.

Usefulness During shopping user can compare the

price by scanning barcode of the product through internet.

User can down load the ring tone , picture, music in music store.

User can bid on e-bay

Steps to get barcode application on phone Get the free software from the internet. Download the software to a cell phone

with camera. It is ready to use . Take a picture of any barcode with the

camera and you can get the product details.

MMS Next generation of SMS. JSR205,WMA 2.0 ,adds support for MMS

with the MultipartMessage class. It keeps track of multiple addresses,a

message subject and some number of MessageParts,which are essentially file with associated content type.

Exact size limit on MMS depends on the phone and the carrier. Max is 100KB

Example: Send MMSPublic void sendMultipart(Stringaddress,String

subject,MessagePart[] parts){String cs=mms://+address+”applicationIdentifier”

MessageConnection mc=(MessageConnection)Connector.open(cs);

MultipartMessage mm=(MultipartMessage)mc.newMessage(MessageConnection.MULTIPART_MESSAGE);

mm.setSubject(subject);for(int i=0;i<parts.length();i++)mm.addMessagePart(parts[i]);mc.send();

}

MMS in brief It looks same, get a MessageConnection,get

message,populate it and send it. Connection string starts with mms and it includes

application identifier (more reliable). Application identifier=an inverted domain

name+an application name and the size of AI can be a maximum of 32 char.

U can use addAddress() in MultipartMessage to add more address.

Each multipart message has a content type,a content ID,an optional location and an optional encoding scheme.ContentID should be unique for each part of multipart message.

SIM Card Application

SIM Card (Subscriber Identity module) What is SIM card? SIM Card Specification. SIM Operating System. Nice thing with SIM Card application Examples.

SIM Card Part of smart card ICC for mobile phones 2-types of SIM Cards:

1- credit card size 2- phone card

SIM OS: JAVA Card Native OS

Data Stored in SIM Card Subscriber identity. SMSC (Centre). SPN: Service Provider Name

Nice thing with SIM application For Operator: deploy the application to all

subscriber easily For Application provider: SIM card is a standard environment

regardless of brand, age or features

Example Call management application: enable you to send an automatic

message or call back people who tried to reach you while you are unavailable.