Java Tutorial/J2ME/RadioButton
RadioButton with ChoiceGroup
<source lang="java">
import javax.microedition.lcdui.Choice; import javax.microedition.lcdui.ChoiceGroup; import javax.microedition.lcdui.rumand; import javax.microedition.lcdui.rumandListener; import javax.microedition.lcdui.Display; import javax.microedition.lcdui.Displayable; import javax.microedition.lcdui.Form; import javax.microedition.lcdui.StringItem; import javax.microedition.midlet.MIDlet; public class J2MERadioButtons1 extends MIDlet implements CommandListener {
private Display display; private Form form = new Form("Gender"); private Command exit = new Command("Exit", Command.EXIT, 1); private Command process = new Command("Process", Command.SCREEN, 2); private ChoiceGroup gender = new ChoiceGroup("Enter Gender", Choice.EXCLUSIVE); private int currentIndex; private int genderIndex; public J2MERadioButtons1() { display = Display.getDisplay(this); gender.append("Female", null); currentIndex = gender.append("Male ", null); gender.setSelectedIndex(currentIndex, true); 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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