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RMS를 사용하여 Jave ME에 애플리케이션을 작성하려고합니다. 응용 프로그램은 택배 고객에 대한 정보를 저장합니다.RMS를 사용하는 JaveME의 애플리케이션
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.rms.*;
import java.io.ByteArrayOutputStream;
import java.io.ByteArrayInputStream;
import java.io.DataOutputStream;
import java.io.DataInputStream;
public class ClientsApp extends MIDlet implements CommandListener {
// controls
private Display screen = null;
private List menu = null;
private Form addClientForm = null;
private Form showClientForm = null;
private RecordStore clients;
private ByteArrayOutputStream stream = null;
private DataOutputStream out = null;
private byte[] dates;
TextField name = null;
TextField surname = null;
TextField email = null;
TextField phone = null;
DateField date = null;
TextField price = null;
TextField description = null;
// comands
private final Command backCommand;
private final Command mainMenuCommand;
private final Command exitCommand;
private final Command addClientCommand;
public ClientsApp() {
// initializating controls and comands
menu = new List("Lista klientów", Choice.IMPLICIT);
backCommand = new Command("Cofnij", Command.BACK, 0);
mainMenuCommand = new Command("Main", Command.SCREEN, 1);
exitCommand = new Command("Koniec", Command.EXIT, 2);
addClientCommand = new Command("Zapisz", Command.OK, 3);
stream = new ByteArrayOutputStream();
out = new DataOutputStream(stream);
menu.append("Dodaj klienta", null);
menu.append("Przegladaj klientow", null);
menu.append("Usun klienta", null);
}
protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
}
protected void pauseApp() {
}
protected void startApp() throws MIDletStateChangeException {
screen = Display.getDisplay(this);
screen.setCurrent(menu);
try {
clients = RecordStore.openRecordStore("clients", false, RecordStore.AUTHMODE_PRIVATE, false);
}
catch(RecordStoreException exc) {
}
menu.addCommand(exitCommand);
menu.setCommandListener(this);
}
public void commandAction(Command cmd, Displayable dsp) {
if(cmd.getCommandType() == Command.EXIT) {
try{
destroyApp(false);
notifyDestroyed();
}
catch(Exception exc) {
exc.printStackTrace();
}
}
else if(cmd.getCommandType() == Command.BACK) {
screen.setCurrent(menu);
}
else if(cmd.getCommandType() == Command.OK) {
try {
out.writeUTF(name.getString());
out.writeUTF(surname.getString());
out.writeUTF(email.getString());
out.writeUTF(phone.getString());
out.writeUTF(date.getDate().toString());
out.writeUTF(price.getString());
out.writeUTF(description.getString());
dates = stream.toByteArray();
clients.addRecord(dates, 0, dates.length);
stream.close();
out.close();
clients.closeRecordStore();
}
catch(Exception exc) {
}
}
else {
List option = (List) screen.getCurrent();
switch(option.getSelectedIndex()) {
case 0 : {
addClients();
break;
}
case 1 : {
showClients();
break;
}
case 2 : {
deleteClients();
break;
}
}
}
}
protected void addClients() {
addClientForm = new Form("Dodaj klienta");
name = new TextField("Imię klienta", "", 10, TextField.ANY);
surname = new TextField("Nazwisko klienta", "", 15, TextField.ANY);
email = new TextField("Email klienta", "", 20, TextField.EMAILADDR);
phone = new TextField("Numer telefonu", "", 12, TextField.PHONENUMBER);
date = new DateField("Data dostarczenia", DateField.DATE);
price = new TextField("Do zapłaty", "", 6, TextField.NUMERIC);
description = new TextField("Uwagi", "", 50, TextField.ANY);
addClientForm.append(name);
addClientForm.append(surname);
addClientForm.append(email);
addClientForm.append(phone);
addClientForm.append(date);
addClientForm.append(price);
addClientForm.append(description);
screen.setCurrent(addClientForm);
addClientForm.addCommand(backCommand);
addClientForm.addCommand(addClientCommand);
addClientForm.setCommandListener(this);
}
protected void showClients() {
TextBox info = new TextBox("Klienci", null, 100, 0);
RecordEnumeration iterator = null;
String str = null;
byte[] temp = null;
try {
iterator = clients.enumerateRecords(null, null, false);
while(iterator.hasNextElement()) {
temp = iterator.nextRecord();
}
for(int i = 0; i < temp.length; i++) {
str += (char) temp[i];
}
System.out.println(str);
clients.closeRecordStore();
}
catch(Exception exc) {
}
info.setString(str);
screen.setCurrent(info);
}
}
RecordStore의 정보 읽기/쓰기가 작동하지 않습니다. 나는 예외를 던지지 않습니다. 누군가 나를 도울 수 있을까요?
추자. 저의 언어는 유감입니다.