languagechooser.java

针对moto sdk的经典源代码

/**
 * LanguageChooser.java
 *
 * Oct. 15, 2004 
 *
 * (c) Copyright. 2004. Motorola , Inc. ALL RIGHTS RESERVED.
 *  This notice does not imply publication. 
 *
 */

import javax.microedition.lcdui.*;
import java.util.Vector;

/**
 *
 * The Language Chooser UI, 
 */
public class LanguageChooser extends List implements CommandListener {

	static LanguageChooser languageChooser = null;
	int oldLocale = -1, newLocale = -1;

	static public final int LOCALE_EN = 0;
	static public final int LOCALE_SIM_CN = 1;
	static public final int LOCALE_TRA_CN = 2;
	static public final int LOCALE_AUTO = 3;

	static public final String[] locales = {"en", "sc", "tc", "Default"};
	static private ResourceBundle langChooserBundle, enBundle, simChBundle, traChBundle;

	private Vector listeners = new Vector();
	
	private static Command switchLangOK = null;
	static private boolean initialized = false;

	private LanguageChooser (String title) {
		super (title, List.EXCLUSIVE);
	}

	public static LanguageChooser getLanguageChooser (String locale) {
		langChooserBundle = ResourceBundle.getResourceBundle ("LanguageChooser", locale );
		if (!initialized) {

			simChBundle = ResourceBundle.getResourceBundle ("LanguageChooser", locales[LOCALE_SIM_CN]);
			traChBundle = ResourceBundle.getResourceBundle ("LanguageChooser", locales[LOCALE_TRA_CN]);
			enBundle = ResourceBundle.getResourceBundle ("LanguageChooser", locales[LOCALE_EN]);
			languageChooser = new LanguageChooser("title");
                  

			initialized = true;
		}

		for (int i = languageChooser.size () - 1; i >=0 ; i --) {
			languageChooser.delete (i);
		}
		
		languageChooser.setTitle (langChooserBundle.getString ("title"));
		languageChooser.append (enBundle.getString ("language"), null);
    languageChooser.append (simChBundle.getString ("language"), null);
    languageChooser.append (traChBundle.getString ("language"), null);
    languageChooser.append (langChooserBundle.getString ("auto"), null);

		if (switchLangOK != null)
			languageChooser.removeCommand (switchLangOK);
   		switchLangOK = new Command(langChooserBundle.getString("OK"), Command.OK, 1);
		languageChooser.addCommand (switchLangOK);
		languageChooser.setCommandListener (languageChooser);

		return languageChooser;
	}

	public void addLocaleChangeListener (LocaleChangeListener listener) {
		listeners.addElement (listener);
	}

	public boolean removeLocaleChangeListener (LocaleChangeListener listener) {
		return listeners.removeElement (listener);
	}

	public void commandAction (Command c, Displayable d) {
                if (c == switchLangOK) {			
			int newLocale = getSelectedIndex();

			if (newLocale == LOCALE_AUTO) {
				String strLocale = I18NDemo.getDefaultLocale ();
				int i;
				for (i = 0; i < locales.length; i++)
					if (locales[i].equals (strLocale))
						break;
				newLocale = i;
			}

			if (oldLocale!= newLocale){

				for (int i = 0; i < listeners.size(); i++) {
					LocaleChangeListener  listener = (LocaleChangeListener)listeners.elementAt(i);
					listener.localeChanged(locales[newLocale]);
				}
				oldLocale = newLocale;
			}
			I18NDemo.myDisplay.setCurrent (I18NDemo.mainUI);	
		}
	}
}