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How to use ChoiceGroup class - RadioButton in Midlets |
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This example shows how to use ChoiceGroup class (RadioButton) in Midlets.
/*
J2ME: The Complete Reference
James Keogh
Publisher: McGraw-Hill
ISBN 0072227109
*/
//jad file (please verify the jar size)
/*
MIDlet-Name: RadioButtonsMIDlet
MIDlet-Version: 1.0
MIDlet-Vendor: MyCompany
MIDlet-Jar-URL: RadioButtonsMIDlet.jar
MIDlet-1: RadioButtonsMIDlet, , RadioButtonsMIDlet
MicroEdition-Configuration: CLDC-1.0
MicroEdition-Profile: MIDP-1.0
MIDlet-JAR-SIZE: 100
*/
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class RadioButtonsMIDlet extends MIDlet implements CommandListener
{
private Display display;
private Form form;
private Command exit;
private Command process;
private ChoiceGroup gender;
private int currentIndex;
private int genderIndex;
public RadioButtonsMIDlet()
{
display = Display.getDisplay(this);
gender = new ChoiceGroup("Enter Gender", Choice.EXCLUSIVE);
gender.append("Female", null);
currentIndex = gender.append("Male ", null);
gender.setSelectedIndex(currentIndex, true);
exit = new Command("Exit", Command.EXIT, 1);
process = new Command("Process", Command.SCREEN,2);
form = new Form("Gender");
genderIndex = form.append(gender);
form.addCommand(exit);
form.addCommand(process);
form.setCommandListener(this);
}
public void startApp()
{
display.setCurrent(form);
}
public void pauseApp()
{
}
public void destroyApp(boolean unconditional)
{
}
public void commandAction(Command command, Displayable displayable)
{
if (command == exit)
{
destroyApp(false);
notifyDestroyed();
}
else if (command == process)
{
currentIndex = gender.getSelectedIndex();
StringItem message = new StringItem("Gender: ", gender.getString(currentIndex));
form.append(message);
form.delete(genderIndex);
form.removeCommand(process);
}
}
}
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