Mega Code Archive
A first MIDlet with simple text and a few commands
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*
* Copyright 1994-2004 Sun Microsystems, Inc. All Rights Reserved.
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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;
// A first MIDlet with simple text and a few commands.
public class SimpleTextCommandMIDlet extends MIDlet implements CommandListener {
// The exit, info, and buy commands
private Command exitCommand;
private Command infoCommand;
private Command buyCommand;
// The display for this MIDlet
private Display display;
public SimpleTextCommandMIDlet() {
display = Display.getDisplay(this);
exitCommand = new Command("Exit", Command.SCREEN, 1);
infoCommand = new Command("Info", Command.SCREEN, 2);
buyCommand = new Command("Buy", Command.SCREEN, 2);
}
// Start the MIDlet by creating the TextBox and
// associating the exit command and listener.
public void startApp() {
TextBox t = new TextBox("FirstMIDlet", "Welcome to MIDP Programming", 256,
0);
t.addCommand(exitCommand);
t.addCommand(infoCommand);
t.addCommand(buyCommand);
t.setCommandListener(this);
display.setCurrent(t);
}
// Pause is a no-op because there are no background
// activities or record stores 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. Here we are only implementing
// the exit command. In 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();
}
}
}
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