?? demomidlet.java
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/* * @(#)DemoMIDlet.java 1.1 04/04/24 * * Copyright (c) 2000-2004 Sun Microsystems, Inc. All rights reserved. * PROPRIETARY/CONFIDENTIAL * Use is subject to license terms */package example.bluetooth.demo;import javax.microedition.midlet.MIDlet;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;/** * Contains the Bluetooth API demo, that allows to download * the specific images from the other devices. * * @author Vladimir K. Beliaev * @version 1.1, 04/24/04 */public final class DemoMIDlet extends MIDlet implements CommandListener { /** The messages are shown in this demo this amount of time. */ static final int ALERT_TIMEOUT = 2000; /** Soft button for exiting the demo. */ private final Command EXIT_CMD = new Command("Exit", Command.EXIT, 2); /** Soft button for launching a client or sever. */ private final Command OK_CMD = new Command("Ok", Command.SCREEN, 1); /** A list of menu items */ private static final String[] elements = { "Server", "Client" }; /** A menu list instance */ private final List menu = new List("Bluetooth Demo", List.IMPLICIT, elements, null); /** A GUI part of server that publishes images. */ private GUIImageServer imageServer; /** A GUI part of client that receives image from client */ private GUIImageClient imageClient; /** * Constructs main screen of the MIDlet. */ public DemoMIDlet() { menu.addCommand(EXIT_CMD); menu.addCommand(OK_CMD); menu.setCommandListener(this); } /** * Creates the demo view and action buttons. */ public void startApp() { show(); } /** * Destroys the application. */ protected void destroyApp(boolean unconditional) { if (imageServer != null) { imageServer.destroy(); } if (imageClient != null) { imageClient.destroy(); } } /** * Does nothing. Redefinition is required by MIDlet class. */ protected void pauseApp() {} /** * Responds to commands issued on "client or server" form. * * @param c command object source of action * @param d screen object containing actioned item */ public void commandAction(Command c, Displayable d) { if (c == EXIT_CMD) { destroyApp(true); notifyDestroyed(); return; } switch (menu.getSelectedIndex()) { case 0: imageServer = new GUIImageServer(this); break; case 1: imageClient = new GUIImageClient(this); break; default: System.err.println("Unexpected choice..."); break; } } /** Shows main menu of MIDlet on the screen. */ void show() { Display.getDisplay(this).setCurrent(menu); } /** * Returns the displayable object of this screen - * it is required for Alert construction for the error * cases. */ Displayable getDisplayable() { return menu; }} // end of class 'DemoMIDlet' definition
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