Api concepts Refer to the startApp pauseApp, and destroyApp
/*
* AdvanceCommands.java
* Copyright (c) 2000 Sun Microsystems, Inc. All Rights Reserved.
*
* Author: Srikanth Raju
*
* This software is the confidential and proprietary information of Sun
* Microsystems, Inc. ("Confidential Information"). You shall not
* disclose such Confidential Information and shall use it only in
* accordance with the terms of the license agreement you entered into
* with Sun.
*
* SUN MAKES NO REPRESENTATIONS OR WARRANTIES ABOUT THE SUITABILITY OF THE
* SOFTWARE, EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE
* IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR
* PURPOSE, OR NON-INFRINGEMENT. SUN SHALL NOT BE LIABLE FOR ANY DAMAGES
* SUFFERED BY LICENSEE AS A RESULT OF USING, MODIFYING OR DISTRIBUTING
* THIS SOFTWARE OR ITS DERIVATIVES.
*/
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.TextBox;
import javax.microedition.midlet.MIDlet;
/**
* An MIDlet that illustrates more MIDP UI Api concepts Refer to the startApp,
* pauseApp, and destroyApp methods so see how each handles the requested
* transition.
*/
public class AdvanceCommands extends MIDlet implements CommandListener {
private Command exitCommand; // The exit command
private Command nextCommand; // next command
private Command backCommand; // back command
private TextBox t1;
private TextBox t;
private Display display; // The display for this MIDlet
public AdvanceCommands() {
display = Display.getDisplay(this);
nextCommand = new Command("Next", Command.SCREEN, 1);
exitCommand = new Command("Quit", Command.SCREEN, 2);
backCommand = new Command("Back", Command.BACK, 2);
}
/**
* Start up the Hello MIDlet by creating the TextBox and associating the
* exit command and listener.
*/
public void startApp() {
t = new TextBox("Hello MIDlet", "Test string", 256, 0);
t.addCommand(nextCommand);
t.addCommand(exitCommand);
t.setCommandListener(this);
display.setCurrent(t);
}
/**
* Pause is a no-op since there are no background activities or record
* stores that need to be closed.
*/
public void pauseApp() {
}
/**
* Destroy must cleanup everything not handled by the garbage collector. In
* this case there is nothing to cleanup.
*/
public void destroyApp(boolean unconditional) {
}
/*
* Respond to commands, including exit On the exit command, cleanup and
* notify that the MIDlet has been destroyed.
*/
public void commandAction(Command c, Displayable s) {
if (c == exitCommand) {
destroyApp(false);
notifyDestroyed();
}
if (c == nextCommand) {
t1 = new TextBox("2nd TextBox", "2nd TextBox", 256, 0);
t1.addCommand(backCommand);
t1.addCommand(exitCommand);
t1.setCommandListener(this);
display.setCurrent(t1);
}
if (c == backCommand) {
display.setCurrent(t);
}
}
}
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