Mega Code Archive
Start the MIDlet by creating a list of items and associating the exit command with it
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/* License
*
* Copyright 1994-2004 Sun Microsystems, Inc. All Rights Reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
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*
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* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* This software is provided "AS IS," without a warranty of any kind. ALL
* EXPRESS OR IMPLIED CONDITIONS, REPRESENTATIONS AND WARRANTIES, INCLUDING
* ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE
* OR NON-INFRINGEMENT, ARE HEREBY EXCLUDED. SUN MICROSYSTEMS, INC. ("SUN")
* AND ITS LICENSORS SHALL NOT BE LIABLE FOR ANY DAMAGES SUFFERED BY LICENSEE
* AS A RESULT OF USING, MODIFYING OR DISTRIBUTING THIS SOFTWARE OR ITS
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*
* You acknowledge that this software is not designed, licensed or intended
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*/
import javax.microedition.lcdui.Choice;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.List;
import javax.microedition.lcdui.TextBox;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
public class EventEx1 extends MIDlet implements CommandListener {
// display manager
Display display = null;
// a menu with items
List menu = null; // main menu
// textbox
TextBox input = null;
// command
static final Command backCommand = new Command("Back", Command.BACK, 0);
static final Command mainMenuCommand = new Command("Main", Command.SCREEN, 1);
static final Command exitCommand = new Command("Exit", Command.STOP, 2);
String currentMenu = null;
// constructor.
public EventEx1() {
}
/**
* Start the MIDlet by creating a list of items and associating the exit
* command with it.
*/
public void startApp() throws MIDletStateChangeException {
display = Display.getDisplay(this);
menu = new List("Menu Items", Choice.IMPLICIT);
menu.append("Item1", null);
menu.append("Item2", null);
menu.append("Item3", null);
menu.append("Item4", null);
menu.addCommand(exitCommand);
menu.setCommandListener(this);
mainMenu();
}
public void pauseApp() {
display = null;
menu = null;
input = null;
}
public void destroyApp(boolean unconditional) {
notifyDestroyed();
}
// main menu
void mainMenu() {
display.setCurrent(menu);
currentMenu = "Main";
}
/**
* a generic method that will be called when selected any of the items on the
* list.
*/
public void prepare() {
input = new TextBox("Enter some text: ", "", 5, TextField.ANY);
input.addCommand(backCommand);
input.setCommandListener(this);
input.setString("");
display.setCurrent(input);
}
/**
* Test item1.
*/
public void testItem1() {
prepare();
currentMenu = "item1";
}
/**
* Test item2.
*/
public void testItem2() {
prepare();
currentMenu = "item2";
}
/**
* Test item3.
*/
public void testItem3() {
prepare();
currentMenu = "item3";
}
/**
* Test item4.
*/
public void testItem4() {
prepare();
currentMenu = "item4";
}
/**
* Handle events.
*/
public void commandAction(Command c, Displayable d) {
String label = c.getLabel();
if (label.equals("Exit")) {
destroyApp(true);
} else if (label.equals("Back")) {
if (currentMenu.equals("item1") || currentMenu.equals("item2")
|| currentMenu.equals("item3") || currentMenu.equals("item4")) {
// go back to menu
mainMenu();
}
} else {
List down = (List) display.getCurrent();
switch (down.getSelectedIndex()) {
case 0:
testItem1();
break;
case 1:
testItem2();
break;
case 2:
testItem3();
break;
case 3:
testItem4();
break;
}
}
}
}
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