aj@Y Mobile Application Specialist

GPS service with mobile web browser

2010-05-21T18:31:00.000-07:00

This is very interesting feature we can able to implement using Javascript support .Google played important role to launch GEAR technology which helped us to get Longitude and Latitude for device.

Code:

(function() {
  // We are already defined. Hooray!
  if (window.google && google.gears) {
    return;
  }

  var factory = null;

  // Firefox
  if (typeof GearsFactory != 'undefined') {
    factory = new GearsFactory();
  } else {
    // IE
    try {
      factory = new ActiveXObject('Gears.Factory');
      // privateSetGlobalObject is only required and supported on IE Mobile on
      // WinCE.
      if (factory.getBuildInfo().indexOf('ie_mobile') != -1) {
        factory.privateSetGlobalObject(this);
      }
    } catch (e) {
      // Safari
      if ((typeof navigator.mimeTypes != 'undefined')
           && navigator.mimeTypes["application/x-googlegears"]) {
        factory = document.createElement("object");
        factory.style.display = "none";
        factory.width = 0;
        factory.height = 0;
        factory.type = "application/x-googlegears";
        document.documentElement.appendChild(factory);
        if(factory && (typeof factory.create == 'undefined')) {
          // If NP_Initialize() returns an error, factory will still be created.
          // We need to make sure this case doesn't cause Gears to appear to
          // have been initialized.
          factory = null;
        }
      }
    }
  }

  // *Do not* define any objects if Gears is not installed. This mimics the
  // behavior of Gears defining the objects in the future.
  if (!factory) {
    return;
  }

  // Now set up the objects, being careful not to overwrite anything.
  //
  // Note: In Internet Explorer for Windows Mobile, you can't add properties to
  // the window object. However, global objects are automatically added as
  // properties of the window object in all browsers.
  if (!window.google) {
    google = {};
  }

  if (!google.gears) {
    google.gears = {factory: factory};
  }
})();

*******************************************************************************

LBS on mobile with google map

2010-05-02T02:44:00.000-07:00

Using google map api application developers now able to locate exact location of USER on map it self. Some time using geo-coding we can also point user search location on map.Bellow introduction will help you to get your final implementation,

Map key :
For using google map we need to register for map key ,
http://code.google.com/apis/maps/signup.html
This key will going to pass while sending request to google map api.From version 3 google removed API KEY for geocoding. We only need it to pass for getting map view.

Find Longitude and Latitude From location :

From location we can able to get longitude and latitude using map api.
E.g. If we want to search for "Bhusawal,India" we can pass variable with replacing all spaced by $ to url.
       http://maps.google.com/maps/api/geocode/xml?address=bhusawal$india&sensor=true

output:

21.0473710
75.7876590

   Here we used are Version 3 API. Version 2 api are deprecated now,so make sure you should update your previous api to above version 3.

Get Location On Map:

    By passing longitude and latitude user able to locate himself on Google Map.
   http://maps.google.com/staticmap?center=red&markers=21.0473710,75.7876590
   Here markers is variable which take of location points we have to pass exact latitude,longitude to this variable.

   Zoom In / Zoom Out:
   We can able to do actual zoom in and zoom out using map api ,please look at Zoom variable
   http://maps.google.com/staticmap?center=red&markers=21.0473710,75.7876590&zoom=12
   Here we can increase value of variable to get detailed view and vice-versa.

Define Size as per device screen:
   We would have control for map view,we can define exact size we want,look at size variable.
http://maps.google.com/staticmap?center=red&markers=21.0473710,75.7876590&zoom=12&size=240x320

Navigation
   Up/Down: We can move map navigation to up by increasing latitude value and vice versa for down
                     navigation.
   Left/Right: We can decrease value of longitude for left navigation of map and vise versa for right navigation.

Detail URL:
http://maps.google.com/staticmap?center=red&markers=21.0473710,75.7876590&zoom=12&size=500x500&key=API_KEY&format=gif&maptype=mobile

Encode QR-Code With J2ME

2010-03-17T21:41:00.000-07:00

I used Zxing open source lib to develop this application,we can use lib to built our own QrCode image.

      private static final int BLACK = 0xFF000000;
    private static final int WHITE = 0xFFFFFFFF;

///This function will start QRCode process.

public void createQR(){

           Hashtable hints = new Hashtable();
            hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
            QRCode qrCode = new QRCode();
            //set the correction level
            Encoder.encode(content, ErrorCorrectionLevel.M, hints, qrCode);
            //create the matrix to be encoded
            ByteMatrix matrix = QRCodeWriter.renderResult(qrCode, 200, 200);
            //create the image from the matrix
            Image image = createImageFromMatrix(matrix);
}
    //This function will help to arrange RGB data with QR.
    public static Image createImageFromMatrix(ByteMatrix matrix) {
        int width = matrix.getWidth();
        int height = matrix.getHeight();
        int[] rgb = new int[ height*width];
        int count=0;
          for (int y = 0; y < height; y++) {
            for (int x = 0; x < width; x++) {
             rgb[count++] =(matrix.get(x, y) == 0 ? BLACK : WHITE);
          }
        }
        Image image = Image.createRGBImage(rgb, width, height, false) ;
        return image;
    }

Encode QR-Code with core java

2010-03-17T03:44:00.000-07:00

Using Open source library Zxing we can generate QR-Code.We can download lib from http://code.google.com/p/zxing.
Encoding lib source is exist in Core-->qrcode directory,using bellow source we can able to create
QR-Code very easily.

try{
        QRCodeWriter qw =new QRCodeWriter();
         String content= "ajay";
        Hashtable hints = new Hashtable();
        hints.put(EncodeHintType.CHARACTER_SET, "UTF-8");
        QRCode qrCode = new QRCode();
        //set the correction level
          Encoder.encode(content, ErrorCorrectionLevel.M, hints, qrCode);
        //create the matrix to be encoded
        ByteMatrix matrix = QRCodeWriter.renderResult(qrCode, 256, 256);
        //create the image from the matrix
        BufferedImage image = createImageFromMatrix(matrix);
        File barcode = new File("d:/qrcode.png");
        ImageIO.write(image, "png", barcode);
        }
       catch (Exception e) {
                System.out.println(e);
        }

CALL SETUP

2010-02-01T07:38:00.000-08:00

1: Call packet receive at BTS and forward to BSC
2: BSC send packet to MSC where all routing decision will take place
3: MSC determine receiver location from VLR (info abt other mobile subscribers ) and HLR (data about sim ) .
If Delivering SMSs from subscribers to the short message service centre (SMSC) and vice versa.
4: Gateway MSC (G-MSC) is the MSC that determines which visited MSC the subscriber who is being called is currently located.

NFC ( Near Field Communication)

2010-01-28T00:06:00.000-08:00

     A Very Short Range Radio Communication Technology which will going to boom in next banking market, where all our transaction will replace by NFC Process. All Credit cards,Travel Cards,Bus-Train Passes-tickets would get replace by NFC.

     NFC is finding a perfect solution for replacing all payment transactions, Where Iphone also filed patent to keep touch implementation of NFC in US,Motorola also recently joined NFC patent tool.

   I collect some device info related to NFC which would be available for end user like Nokia 6212 classic,Nokia 6131, Nokia 3220, Sagem my700n ,Samsung x700,Samsung D500e , Motorola L7, Benq T8 etc.
        For J2ME developer JSR 257 will help to provide NFC process implementation. You can find bellow samples to build NFC process
      http://wiki.forum.nokia.com/index.php/Portal:NFC_Java_Code_Examples

Mobile Virus

2010-01-24T06:07:00.000-08:00

VIRUS a word which will make alert warning to Every Person in current Machine World . A Personal Machine called Mobile , which would help person's to keep his all secured and personal DATA in device only.
But,
What will happen if this personal device get affected by Virus ?

There will be many cases which we cann't be ignored where we can get disturbed if mobile phone gets affected.

Here is small information regarding virus world hope our world can get secure from them,

Cabir: Cabir arrives to cellphone message inbox as caribe.sis file, which carries the worm. When caribe.sis is clicked, the worm activates and starts looking for new devices to infect over bluetooth. When Cabir finds another bluetooth device, it transmit the SIS files to it.
more info: http://www.f-secure.com/v-descs/cabir.shtml

Skulls: A trojan horse piece of code. Once downloaded, the virus, called Skulls, replaces all phone desktop icons with images of a skull. It also will render all phone applications, including SMSes and MMSes useless
more info: http://www.f-secure.com/v-descs/skulls.shtml

Commwarrior: The worm is capable of spreading itself via Bluetooth and MMS.

Mosquito Trojan: If installed by the user, the illegal game may cause the phone to send text messages to premium rate numbers without the user’s approval or knowledge.

Series 40 Class hierarchy Implementation issue

2010-01-12T03:59:00.000-08:00

Scenario:

Interface A
Class B implements A
Class C extends B

Solution:

If Interface A contains 5 methods out of which 3 defined in Class B and 2 in Class C.
Then if we have to declare these 2 methods of class C as abstract declaration in Class A,Else It will
throw Exception "No Method Found: abc.B(v)

Import External JAR in J2ME Polish Project

2009-11-18T18:53:00.001-08:00

Put external jar file in "/polish path/import/extern.jar"

In Build.xml provide:

Inside build tag,

build

( open tag ) libraries
( open tag ) library file="${polish.home}/import/extern.jar" ( close tag )
libraries ( close tag )

**Please provide proper tag at "open tag "<" and close tag '>'.Since this blog doesnt support Html text.

Signing for J2ME (Midlet Signing)

2009-10-31T22:08:00.000-07:00

1. To generate a public/private key pair, enter the following command, specifying a name for your keystore and an alias as well
keytool -genkey -keyalg rsa -keystore -alias

2. The following command requests Keytool to create a CSR for the key pair in the keystore:
keytool –certreq –file certreq.csr –keystore -alias

3. Copy the contents of the CSR and paste them directly into the VeriSign enrollment form. (or Singning authority form) Open the file in a text editor that does not add extra characters.

4. You should receive mail which will have text file and look like

-----BEGIN CERTIFICATE-----
[encoded data]
-----END CERTIFICATE-----

5. Make sure you have 5 dashes to either side of the BEGIN CERTIFICATE and END CERTIFICATE and that no white space, extra line breaks or additional characters have been inadvertently added.

To import your Sun Java Signing Code Signing Digital ID into your keystore, enter the following code with the path correct name for your file (for example, “cert.p7b”) to your Code Signing Digital ID.

keytool –import –trustcacerts –keystore -alias -file cert.p7b

6. To add the certificate of the key pair from the given keystore to the JAD file.

Java -jar JadTool.jar -addcert -keystore -alias -storepass -inputjad -outputjad

7. To add the digital signature of the JAR file to the specified JAD file. The default value for -jarfile is the MIDlet-Jar-URL property in the JAD file.

java -jar jadtool.jar -addjarsig -jarfile -keystore -alias -storepass -keypass -inputjad -outputjad

8. After the midlet is signed you can view the certificate to see if the midlet is signed correctly:

java -jar jadtool.jar -showcert -all -inputjad

eRCP:GUI construction tools for mobile and embedded development

2009-06-09T21:03:00.000-07:00

API Available in eSWT.

Basic Layer in Native System.

This is the extension of Eclipse Rich Client Platform for embedded device.
Mainly designed for CDC environment like windows. Sprint has added in windows
devices to built rich GUI http://www.sprint.com/SprintTitan.
Also some Symbian FP2 onwards has support of eSWT which is component of eRCP.

SMS application

2009-03-24T03:35:00.000-07:00

Here you will find how application can send SMS using MODEM.

SMS engine : http://sourceforge.net/projects/jsmsengine/

Connecting To GSM Modem:

import org.jsmsengine.CIncomingMessage;
import org.jsmsengine.CService;

CService srv =null;

// com port where your modem is connected

srv = new CService("COM5",115200);

msgList = new LinkedList();

srv.setSimPin("0123");
srv.initialize();
//Set the cache directory.
srv.setCacheDir(".\\");
status = srv.connect();
System.out.println("the Status is "+status);

//Set the operation mode to PDU - default is ASCII.
srv.setOperationMode(CService.MODE_PDU);

// Set the SMSC number (set to default).
srv.setSmscNumber("");

Receiving SMS:

System.out.println("Start Reading SMS ");

srv.readMessages(msgList, CIncomingMessage.CLASS_ALL);

CIncomingMessage msg = (CIncomingMessage) msgList.get(i);

SendersNo =msg.getOriginator();

System.out.println("The message is ");

System.out.println(msg);

Sending SMS:

COutgoingMessage msg1 = new COutgoingMessage(SendersNo,Text);

// Character set is 7bit by default - lets make it UNICODE :)

// We can do this, because we are in PDU mode , When in ASCII mode,

// this does not make ANY difference...

msg1.setMessageEncoding(CMessage.MESSAGE_ENCODING_7BIT);

if (srv.sendMessage(msg1) == CService.ERR_OK)
{
System.out.println("Message Sent!");
}
-----------------------------------------------------------------------------------------------------

JavaFx

2009-03-24T00:17:00.000-07:00

Its really gr8 time for mobile software market ,Since building RIA (rich internet applications) is not limited for WEB application.SUN releases JavaFx for mobile to reach to rich GUI.

JavaFX is a rich client platform for building cross-device applications and content. Designed to enable easy creation and deployment of RIAs with immersive media and content, the JavaFX platform ensures that RIAs look and behave consistently across diverse form factors and devices.

Sun released JavaFx SDK 1.1 :
http://javafx.com/downloads/windows.jsp

API Doc:
http://java.sun.com/javafx/1.1/docs/api/

GUI using LWUIT

2009-03-08T00:00:00.001-08:00

Combination of multiple container:

TAB selection:

Horizontal Carousal Animation using LWUIT..
here i used Borderlayout for creation of following looks.

1.Bouncing of selected ICON.

2.Simple horizontal

How LWUIT can help J2ME developer ?

2009-03-07T23:46:00.000-08:00

LWUIT (LightWeight User Interface Tollkit) is UI lib that help j2me developer to implement RICH Gui.
For j2me polish developer really feel some challenges to make new IDEA implementaion using lwuit.

Why LWUIT :

1.Easy to create GUI using resource files because you can see live implementation while doing coding.
2.Easy for installation of framework
3.Easy to understand GUI framework implementation.

Can find total installation and doc: https://lwuit.dev.java.net/

Java Source Code Links

2009-02-25T20:09:00.000-08:00

1. http://www.javadb.com ... provides source code examples in the Java language

Trace System.out for S603rd editions

2009-02-24T22:53:00.000-08:00

When developing a MIDlet, it is very useful to get the output from the MIDlet somehow visible. This can be done for example simply by adding System.out.println() lines to the code. However, this method normally works only, when you use an emulator or use on-device debugging features of the S60 SDKs.

/////////////////// Create Input Stream Connection /////////

// for S60 3rd Edition FP1 devices or older
InputConnection inputConnection = (InputConnection) Connector.open("redirect://",
   Connector.READ);
inputStream = inputConnection.openInputStream();

// for S60 3rd Edition FP2 devices or newer
InputConnection inputConnection = (InputConnection) Connector.open("redirect://test",
   Connector.READ);
inputStream = inputConnection.openInputStream();

/////////////////How To Use above Stream Connection ///////
while (keepLogging) {
   try { // if there is no data this will block
       len = inputStream.read(data);
   } catch (IOException ioe) {
       ioe.printStackTrace();
   }
   if(len > 0){
       String str = new String(data, 0, len);
 // do something with the string
   }
}

On Device Portal by SUN

2009-02-22T21:04:00.000-08:00

Sun releases new API called LWUIT and ODP Sdk for developing RIA on
Java Enabled Mobile.
Its basic requirement is midp2.0 and cldc1.1

http://java.sun.com/products/java-odp/ODP-datasheet.pdf

New GUI Framework

2008-08-27T08:45:00.000-07:00

How to play video content in j2me polish environment

2008-07-19T08:21:00.000-07:00

Hi guys !!
We can not implement video player directly in j2me polish environment using MMAPI and j2me form or canvas.
Bellow are the some steps which will help u guys to play your video contents on j2me polish environment.

InputStream is = new ByteArrayInputStream(data); ///download video data

Player p = Manager.createPlayer(is,"video/3gpp");

p.realize();
p.setLoopCount(-1); // -1 to set continue loop

VideoControl control = ( VideoControl ) p.getControl( "VideoControl" );

if (control == null) {
System.out.println("Unable to retrieve VideoControl");
return;
}

Canvas canvas = StyleSheet.currentScreen; //get canvas instance

//#if polish.Bugs.displaySetCurrentFlickers && polish.useFullScreen
canvas = MasterCanvas.instance;
//#endif

control.initDisplayMode( VideoControl.USE_DIRECT_VIDEO, canvas ); control.setDisplayLocation(3, 100);
control.setVisible( true );
p.start();

Read XML data (with support of maximum mobile handset)

2008-07-14T00:06:00.000-07:00

Now a days with help of XML its become easy to communicate between mobile and server .Here we can easily transfer data from server to handheld device and vice versa.

Normally there are two type of parser :

1.SAX parser (read and store that data currently in use )

2.DOM (read whole xml data and store it in memory )

Try to use SAX parser to save runtime memory.
There are many SAXParser like Kxml,XmlPullParser etc.

Here i try to explain some necessory steps for XmlPullParser impelmentaion :

1.
Every XML data have Start Document and End Document tag.These tag's help us to catch Start and End pointer postion of XML datasheet.

XmlPullParser parser = new XmlPullParser(xmlReaderStream);
int i = parser.getType();

while( i!=XmlPullParser.END_DOCUMENT ){

//XML data read logic

}

2.
Each sub tag also have Start and End tag .Each tag has some name and specific type associated with it,which will get using parser instance.

int i = parser.getType(); ///get type of parser pointer at current position

switch(i){
case XmlPullParser.START_TAG :
//read logic
break;
case XmlPullParser.END_TAG :
break;
default : break;
}

3.Function useful to access data.

parser.getName() //get attribute name associted with tag
pasrer.getText() //get text data associted with tag
parser.next() //move parser pointer to next position
parser.readText() //read text and move pointer to next position

GUI framework

2008-07-11T09:11:00.000-07:00

ChoiceView:

Carousal View :

Choice View :

*Vertical Banner AD

*.Circular carousel Trverse:

*.Horizontal carousel Trverse:

*.Tab Traverse

*.Simple content traverse:

*.Ad Popup on any screen:

Getiing Location Information (IMEI,MCC,MNC,LAC,CELLID) without GPS

2008-05-14T21:38:00.000-07:00

We can get network related information like CELLID , Mobile Network Code ,Mobile Country Code , Location Area Code from mobile device and these network information will help you to find location of mobile user.I got eperience of these network information on different platform.Hope this information will help for LBS app developer.

http://users.zipworld.com.au/~rmills/MCCandMNCValues.htm

Network Data information
1.http://en.wikipedia.org/wiki/Mobile_country_code
2.http://en.wikipedia.org/wiki/Mobile_Network_Code

For Blackberry:
I tested this code on 8800,8320,8100,8300 got all correct network information.

GPRSCellInfo cellinfo;
cellinfo = GPRSInfo.getCellInfo();
mcc=GPRSInfo.getHomeMCC();
mnc=GPRSInfo.getHomeMNC();
lac=cellinfo.getLAC();
cellid=cellinfo.getCellId();

For Motorola :
Tested on v3xx,v3x .for testing this code your application must be signed.

cellID=System.getProperty("CellID")
lac = System.getProperty("LocAreaCode")
imsi = System.getProperty("IMSI")
mcc = imsi.substring(0,3);
mnc = imsi.substring(3,6);

For Windows Mobile :

Tested on motorola MC35 (windows mobile 5,.net 2.0)
HTC s710(windows mobile 6.0,.net 2.0)

DLL needed : ril.dll,cellcore.dll

RILCELLTOWERINFO rilCellTowerInfo = new RILCELLTOWERINFO();
Marshal.PtrToStructure(lpData, rilCellTowerInfo);
uint UiValue = rilCellTowerInfo.dwCellID;
cellid = String.Format("{0:X2}", UiValue);
mcc = rilCellTowerInfo.dwMobileCountryCode;
mnc = rilCellTowerInfo.dwMobileNetworkCode;
UiValue = rilCellTowerInfo.dwLocationAreaCode;
lac = String.Format("{0:X2}", UiValue);
IMEI will get using tapi class

For Sony-Ericsson :

All sony-ericsson 7.3 platform above will support this.

IMEI=System.getProperty("com.sonyericsson.imei")
MCC=System.getProperty(s1 = "com.sonyericsson.net.cmcc")
MNC=System.getProperty("com.sonyericsson.net.cmnc")
LAC=System.getProperty("com.sonyericsson.net.lac")
CELLID=System.getProperty("com.sonyericsson.net.cellid")

On Nokia .....(From reference) :

IMEI:
>>> import com.symbian.epoc.etel
>>> a = com.symbian.epoc.etel.Etel
>>> b= a.getPhone()
>>> print b.getPhoneId().serialNumber

IMSI:
>>> import com.symbian.javax.telephony.mobile
>>> m = com.symbian.javax.telephony.mobile.EpocGsmMobileTerminal(tad,p)
>>> mads = m.getAddresses()
>>> m = mads[0]
>>> print m.getSubscriptionId

This is not "pure" java, but Jython which acesses Javaphone library, but you should get the point.

And, once you read the IMEI and IMSI... and hence you detect your SIM has been changed by the THIEF who STOLE your phone, you can start a call which can't be stopped by the phone user!
import com.symbian.javax.telephony.mobile
p = com.symbian.javax.telephony.mobile.EpocGsmMobileProvider
ts = p.getTerminals()
t = ts[0]
tads = t.getAddresses()
tad = tads[0]
mc = p.createCall()
call = mc.connect(t,tad,"number")

Getting IMEI from all major platforms:

Nokia

System.getProperty("phone.imei");
System.getProperty("com.nokia.imei");
System.getProperty("com.nokia.mid.imei"); ....For S40 fp1 onwards but binary need to be signed

Sony Ericsson

System.getProperty("com.sonyericsson.imei");

Samsung

System.getProperty("com.samsung.imei");

Motorola

System.getProperty("IMEI");
System.getProperty("com.motorola.IMEI");

Siemens

System.getProperty("com.siemens.IMEI");

System.getProperty("com.lge.imei");

J2ME Polish application development

2008-05-14T19:37:00.001-07:00

Installation Process :

1. JAVA SE
http://java.sun.com/javase/downloads/index.jsp
2. J2ME SDK
http://java.sun.com/products/sjwtoolkit/download.html
3. J2ME Polish SDK
http://www.j2mepolish.org/cms/leftsection/download.html
4. Eclipse IDE
http://www.eclipse.org
5. Integrate J2ME polish with Eclipse
http://www.j2mepolish.org/cms/leftsection/documentation/installation/ide-integration.html

...Dont forget to set JAVA_HOME in system variable as C:\j2sdk1.4.2_09 (path java sdk)

BUILD.xml

Set the midlet class : midlet class="com.cmny.MyMidlet" name="MyProject"
Set Device : property name="devices" value="Nokia/Series60E2"
Set Polish path : property name="polish.home" location="C:\Program Files\J2MEpolish"
Set JAD Info : : " name="Mid1"
version="1.0"
description="A ODP project"
vendorName="abc info"
infoUrl="http://www.abc.com"
icon="a.png"
jarName="abc.jar"
jarUrl="${deploy-url}${polish.jarName}""