alertmidlet.java

<j2me 开发精解> 詹建光著 里所有的源码。对J2me的开发相当有帮助

package com.j2medev.sample.chapter3;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;

public class AlertMidlet extends MIDlet implements CommandListener {
    
    private Display display = null;
    private Alert confirm = new Alert("确认", "一些确认信息", null, AlertType.CONFIRMATION);
    private Alert error = new Alert("错误", "一些错误信息", null, AlertType.ERROR);
    private List menu = new List("UIDemo", List.IMPLICIT, new String[]{"AlertType.CONFIRMATION类型", "AlertType.ERROR类型"}, null);
    
    
    public void startApp() {
        if(display==null) {
            display = Display.getDisplay(this);
            menu.setCommandListener(this);
        }
        display.setCurrent(menu);
    }
    
    public void pauseApp() {
    }
    
    public void destroyApp(boolean unconditional) {
    }
    
    public void commandAction(Command cmd, Displayable d) {
        if(cmd==List.SELECT_COMMAND) {
            if(menu.getSelectedIndex()==0)
                display.setCurrent(confirm);
            if(menu.getSelectedIndex()==1)
                display.setCurrent(error);
        }
    }
    
}