//**************************************
//
// Name: J2ME Contacts for Mobile's, PDA
// & other Devices
// Description:Mobile phones enable you
// to enter a list of phone numbers that
You commonly use, along with the name of the person
Associated with the number.
Although this primitive contact list is useful for
Making calls for familiar friends and business associates.
// By: Bhushan.
//
//This code is copyrighted and has// limited warranties.Please see http://
// www.Planet-Source-Code.com/vb/scripts/Sh
// owCode.asp?txtCodeId=3083&lngWId;=2//for details.//**************************************
//
/* Save this file Contacts.java
* Start the code
*
*/
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.util.*;
import java.io.*;
import javax.microedition.io.*;
import javax.microedition.rms.*;
public class Contacts extends MIDlet implements CommandListener {
private Command exitCommand, addCommand, backCommand, saveCommand,
deleteCommand;
private Display display;
private List mainScreen;
private Form contactScreen;
private TextField nameField, companyField, phoneField, faxField;
private ChoiceGroup contactType;
private boolean editing = false;
private ContactDB db = null;
private Vector contactIDs = new Vector();
private Image[] typeImages;
public Contacts() {
// Get the Display object for the MIDlet
//
display = Display.getDisplay(this);
// Create the commands
exitCommand = new Command("Exit", Command.EXIT, 2);
addCommand = new Command("Add", Command.SCREEN, 3);
backCommand = new Command("Back", Command.BACK, 2);
saveCommand = new Command("Save", Command.OK, 3);
deleteCommand = new Command("Delete", Command.SCREEN, 3);
// Create the main screen
mainScreen = new List("Contacts", List.IMPLICIT);
// Set the Exit and Add commands for the
// main screen
mainScreen.addCommand(exitCommand);
mainScreen.addCommand(addCommand);
mainScreen.setCommandListener(this);
// Create the contact screen
contactScreen = new Form("Contact Info");
nameField = new TextField("Name", "", 30, TextField.ANY);
contactScreen.append(nameField);
companyField = new TextField("Company", "", 15, TextField.ANY);
contactScreen.append(companyField);
phoneField = new TextField("Phone", "", 10, TextField.PHONENUMBER);
contactScreen.append(phoneField);
faxField = new TextField("Fax", "", 10, TextField.PHONENUMBER);
contactScreen.append(faxField);
String[] choices = { "Personal", "Business", "Family", "Other" };
contactType = new ChoiceGroup("Type", Choice.EXCLUSIVE, choices, null);
contactScreen.append(contactType);
// Set the Back, Save, and Delete comman
// ds for the contact screen
contactScreen.addCommand(backCommand);
contactScreen.addCommand(saveCommand);
contactScreen.addCommand(deleteCommand);
contactScreen.setCommandListener(this);
// Load the type images
try {
typeImages = new Image[4];
typeImages[0] = Image.createImage("/Personal.png");
typeImages[1] = Image.createImage("/Business.png");
typeImages[2] = Image.createImage("/Family.png");
typeImages[3] = Image.createImage("/Other.png");
}
catch (IOException e) {
System.err.println("EXCEPTION: Failed loading images!");
}
// Open the contact database
try {
db = new ContactDB("contacts");
}
catch(Exception e) {
System.err.println("EXCEPTION: Problem opening the database.");
}
// Read through the database and build a
// list of record IDs
RecordEnumeration records = null;
try {
records = db.enumerateContactRecords();
while(records.hasNextElement())
contactIDs.addElement(new Integer(records.nextRecordId()));
}
catch(Exception e) {
System.err.println("EXCEPTION: Problem reading the contact records.");
}
// Read through the database and fill th
// e contact list
records.reset();
try {
while(records.hasNextElement()) {
Contact contact = new Contact(records.nextRecord());
mainScreen.append(contact.getName(), typeImages[contact.getType()]);
}
}
catch(Exception e) {
System.err.println("EXCEPTION: Problem reading the contact records.");
}
}
public void startApp() throws MIDletStateChangeException {
// Set the current display to the main s
// creen
display.setCurrent(mainScreen);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
// Close the contact database
try {
db.close();
}
catch(Exception e) {
System.err.println("EXCEPTION: Problem closing the database.");
}
}
public void commandAction(Command c, Displayable s) {
if (c == exitCommand) {
destroyApp(false);
notifyDestroyed();
}
else if (c == addCommand) {
// Clear the contact fields
nameField.setString("");
companyField.setString("");
phoneField.setString("");
faxField.setString("");
contactType.setSelectedIndex(0, true);
// Remove the Delete command from the co
// ntact screen
contactScreen.removeCommand(deleteCommand);
editing = false;
// Set the current display to the contac
// t screen
display.setCurrent(contactScreen);
}
else if (c == List.SELECT_COMMAND) {
// Get the record ID of the currently se
// lected contact
int index = mainScreen.getSelectedIndex();
int id = ((Integer)contactIDs.elementAt(index)).intValue();
// Retrieve the contact record from the
// database
Contact contact = db.getContactRecord(id);
// Initialize the contact fields
nameField.setString(contact.getName());
companyField.setString(contact.getCompany());
phoneField.setString(contact.getPhone());
faxField.setString(contact.getFax());
contactType.setSelectedIndex(contact.getType(), true);
// Add the Delete command to the contact
// screen
contactScreen.addCommand(deleteCommand);
editing = true;
// Set the current display to the contac
// t screen
display.setCurrent(contactScreen);
}
else if (c == deleteCommand) {
// Get the record ID of the currently se
// lected contact
int index = mainScreen.getSelectedIndex();
int id = ((Integer)contactIDs.elementAt(index)).intValue();
// Delete the contact record
db.deleteContactRecord(id);
contactIDs.removeElementAt(index);
mainScreen.delete(index);
// Set the current display back to the m
// ain screen
display.setCurrent(mainScreen);
}
else if (c == backCommand) {
// Set the current display back to the m
// ain screen
display.setCurrent(mainScreen);
}
else if (c == saveCommand) {
if (editing) {
// Get the record ID of the currently se
// lected contact
int index = mainScreen.getSelectedIndex();
int id = ((Integer)contactIDs.elementAt(index)).intValue();
// Create a record for the contact and s
// et it in the database
Contact contact = new Contact(nameField.getString(), companyField.getString(),
phoneField.getString(), faxField.getString(), contactType.getSelectedIndex());
db.setContactRecord(id, contact.pack());
mainScreen.set(index, contact.getName(), typeImages[contact.getType()]);
}
else {
// Create a record for the contact and a
// dd it to the database
Contact contact = new Contact(nameField.getString(), companyField.getString(),
phoneField.getString(), faxField.getString(), contactType.getSelectedIndex());
contactIDs.addElement(new Integer(db.addContactRecord(contact.pack())));
mainScreen.append(contact.getName(), typeImages[contact.getType()]);
}
// Set the current display back to the m
// ain screen
display.setCurrent(mainScreen);
}
}
}
/* END OF CODE Contacts.java
*
*/
/* Sava this file name as Contact.java
* Start the code
*/
import java.util.*;
public class Contact {
private String name, company, phone, fax;
private int type;
public Contact(String n, String c, String p, String f, int t) {
name = n;
company = c;
phone = p;
fax = f;
type = t;
}
public Contact(byte[] data) {
unpack(new String(data));
}
public void unpack(String data) {
int start = 0, end = data.indexOf(';');
name = data.substring(start, end);
start = end + 1;
end = data.indexOf(';', start);
company = data.substring(start, end);
start = end + 1;
end = data.indexOf(';', start);
phone = data.substring(start, end);
start = end + 1;
end = data.indexOf(';', start);
fax = data.substring(start, end);
start = end + 1;
type = Integer.parseInt(data.substring(start, data.length()));
}
public String pack() {
return (name + ';' + company + ';' + phone + ';' + fax + ';' +
((String)Integer.toString(type)));
}
public String getName() {
return name;
}
public String getCompany() {
return company;
}
public String getPhone() {
return phone;
}
public String getFax() {
return fax;
}
public int getType() {
return type;
}
}
/* End of code Contact.java
*
*/
/* Save this file name as ContactDB.java
*
*/
import javax.microedition.rms.*;
import java.util.Enumeration;
import java.util.Vector;
import java.io.*;
public class ContactDB {
RecordStore recordStore = null;
public ContactDB(String name) {
// Open the record store using the speci
// fied name
try {
recordStore = open(name);
}
catch(RecordStoreException e) {
e.printStackTrace();
}
}
public RecordStore open(String fileName) throws RecordStoreException {
return RecordStore.openRecordStore(fileName, true);
}
public void close() throws RecordStoreNotOpenException,
RecordStoreException {
// If the record store is empty, delete
// the file
if (recordStore.getNumRecords() == 0) {
String fileName = recordStore.getName();
recordStore.closeRecordStore();
recordStore.deleteRecordStore(fileName);
}
else {
// Otherwise, close the record store
recordStore.closeRecordStore();
}
}
public Contact getContactRecord(int id) {
// Get the contact record from the recor
// d store
try {
return (new Contact(recordStore.getRecord(id)));
}
catch (RecordStoreException e) {
e.printStackTrace();
}
return null;
}
public synchronized void setContactRecord(int id, String record) {
// Convert the string record to an array
// of bytes
byte[] bytes = record.getBytes();
// Set the record in the record store
try {
recordStore.setRecord(id, bytes, 0, bytes.length);
}
catch (RecordStoreException e) {
e.printStackTrace();
}
}
public synchronized int addContactRecord(String record) {
// Convert the string record to an array
// of bytes
byte[] bytes = record.getBytes();
// Add the byte array to the record stor
// e
try {
return recordStore.addRecord(bytes, 0, bytes.length);
}
catch (RecordStoreException e) {
e.printStackTrace();
}
return -1;
}
public synchronized void deleteContactRecord(int id) {
// Delete the contact record from the re
// cord store
try {
recordStore.deleteRecord(id);
}
catch (RecordStoreException e) {
e.printStackTrace();
}
}
public synchronized RecordEnumeration enumerateContactRecords()
throws RecordStoreNotOpenException {
return recordStore.enumerateRecords(null, null, false);
}
}
/* End of code ContactDB.java
*
*/ |
