Utilisation des fonctions de bases de J2ME pour créer un répertoire de gestion de contacts. Idéale pour de-butter en J2ME
Source / Exemple :
Midlet : RepertoryMidlet.java
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package com.supinfo.sun.repertory.midlets;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.List;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.*;
import javax.microedition.rms.RecordStore;
import javax.microedition.rms.RecordStoreException;
import javax.microedition.rms.RecordStoreNotOpenException;
/**
public class RepertoryMidlet extends MIDlet implements CommandListener {
private List contactList;
private Form contactForm;
private Command addCommand;
private Command modifyCommand, deleteCommand;
private Display display;
private TextField name, mail, phoneNumber;
private RecordStore store;
public RepertoryMidlet() {
contactList = new List("Contact", List.IMPLICIT);
addCommand = new Command("add", Command.ITEM, 1);
modifyCommand = new Command("modify", Command.ITEM, 2);
deleteCommand = new Command("delete", Command.CANCEL, 0);
contactList.addCommand(addCommand);
contactList.addCommand(modifyCommand);
contactList.addCommand(deleteCommand);
contactList.setCommandListener(this);
display = Display.getDisplay(this);
try {
store = RecordStore.openRecordStore("Contact", true);
} catch (RecordStoreException ex) {
notifyDestroyed();
}
try {
for (int i = 1; i <= store.getNumRecords(); i++) {
Contact contact = new Contact();
try {
contact.parseByteArray(store.getRecord(i), '&');
contactList.append(contact.getName(), null);
} catch (RecordStoreException ex) {
ex.printStackTrace();
}
}
} catch (RecordStoreNotOpenException ex) {
ex.printStackTrace();
}
}
public void startApp() {
display.setCurrent(contactList);
}
public void pauseApp() {
}
public void destroyApp(boolean unconditional) {
try {
store.closeRecordStore();
} catch (RecordStoreException ex) {
}
}
public void commandAction(Command c, Displayable d) {
if (d == contactList) {
if (c == addCommand) {
contactForm = new Form("Contact");
name = new TextField("Name", null, 50, TextField.ANY);
phoneNumber = new TextField("phone number", null, 10, TextField.PHONENUMBER);
mail = new TextField("mail", null, 255, TextField.EMAILADDR);
contactForm.append(name);
contactForm.append(phoneNumber);
contactForm.append(mail);
contactForm.addCommand(addCommand);
contactForm.setCommandListener(this);
display.setCurrent(contactForm);
} else if (c == modifyCommand) {
contactForm = new Form("Contact");
Contact contact = new Contact();
try {
contact.parseByteArray(store.getRecord(contactList.getSelectedIndex() + 1), '&');
name = new TextField("Name", contact.getName(), 50, TextField.ANY);
phoneNumber = new TextField("phone number", contact.getPhoneNumber(), 10, TextField.PHONENUMBER);
mail = new TextField("mail", contact.getMail(), 255, TextField.EMAILADDR);
contactForm.append(name);
contactForm.append(phoneNumber);
contactForm.append(mail);
contactForm.addCommand(modifyCommand);
contactForm.setCommandListener(this);
display.setCurrent(contactForm);
} catch (RecordStoreException ex) {
ex.printStackTrace();
}
} else if (c == deleteCommand) {
try {
store.deleteRecord(contactList.getSelectedIndex() + 1);
contactList.delete(contactList.getSelectedIndex());
for (int i = contactList.getSelectedIndex() + 2; i <= store.getNumRecords(); i++) {
store.setRecord(i - 1, store.getRecord(i), 0, store.getRecordSize(i));
}
store.deleteRecord(store.getNumRecords());
} catch (RecordStoreException ex) {
ex.printStackTrace();
}
}
} else if (d == contactForm) {
if (c == addCommand) {
saveContact();
display.setCurrent(contactList);
} else if (c == modifyCommand) {
modifyContact();
display.setCurrent(contactList);
}
}
}
private void saveContact() {
Contact contact = new Contact(name.getString(), mail.getString(), phoneNumber.getString());
try {
store.addRecord(contact.toByteArray('&'), 0, contact.toByteArray('&').length);
contactList.append(contact.getName(), null);
} catch (RecordStoreException ex) {
ex.printStackTrace();
}
}
private void modifyContact() {
Contact contact = new Contact(name.getString(), mail.getString(), phoneNumber.getString());
try {
store.setRecord(contactList.getSelectedIndex() + 1, contact.toByteArray('&'), 0, contact.toByteArray('&').length);
contactList.set(contactList.getSelectedIndex(), contact.getName(), null);
} catch (RecordStoreException ex) {
ex.printStackTrace();
}
}
}
Beans : Contact.java
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package com.supinfo.sun.repertory.midlets;
/**
*
public class Contact {
private String name, mail, phoneNumber;
public Contact() {
}
public Contact(String name, String mail, String phoneNumber) {
this.name = name;
this.mail = mail;
this.phoneNumber = phoneNumber;
}
public String getMail() {
return mail;
}
public void setMail(String mail) {
this.mail = mail;
}
public String getName() {
return name;
}
public void setName(String name) {
this.name = name;
}
public String getPhoneNumber() {
return phoneNumber;
}
public void setPhoneNumber(String phoneNumber) {
this.phoneNumber = phoneNumber;
}
public void parseByteArray(byte[] record, char separator) {
if(record != null) {
String values = new String(record);
int index = values.indexOf(separator);
int lastIndex = values.lastIndexOf(separator);
this.name = values.substring(0, index);
this.phoneNumber = values.substring(index+1, lastIndex);
this.mail = values.substring(lastIndex+1);
}
}
public byte[] toByteArray(char separator) {
return (this.name + separator + this.phoneNumber + separator +
this.mail).getBytes();
}
}
Conclusion :
Testez et comprenez ce que vous faite. c'est un très bon exercice.
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