nativemidlet.java

手机MIDlet的应用

/*
 * NativeMIDlet.java
 *
 * Created on 2007年10月6日, 下午5:16
 */

package com.j2medev.chapter3;

import javax.microedition.io.Connection;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.io.ConnectionNotFoundException;

/**
 *
 * @author  NeNo
 * @version
 */
public class NativeMIDlet extends MIDlet implements CommandListener {
    
    private Display display = null;
    private List main = new List ("menu",List.IMPLICIT);
    private Command exitCommand = new Command("Exit",Command.EXIT,1);
    public static final String WAP_BROWSER = "wap browser";
    public static final String TELEPHONE = "call telephone";
    
    public void startApp() {
        if(display == null) {
            display = Display.getDisplay(this);
            main.append(WAP_BROWSER,null);
            main.append(TELEPHONE,null);
            main.addCommand(exitCommand);
            main.setCommandListener(this);
        }
        display.setCurrent(main);
    }
    
    public void pauseApp() {
    }
    
    public void destroyApp(boolean unconditional) {
    }
    
    public void commandAction(Command cmd,Displayable displayable) {
        if(cmd == List.SELECT_COMMAND){
            String label = main.getString(main.getSelectedIndex());
            String URL = "";
            if(label.equals(WAP_BROWSER)){
                URL = "http://www.j2medev.com";
            }else if(label.equals(TELEPHONE)){
                URL = "tel:[phone]";
            }
            try{
                boolean flag = platformRequest(URL);
                if(flag){
                    exit();
                }
            }catch(ConnectionNotFoundException ex){
                ex.printStackTrace();
                Alert a = new Alert("error",ex.getMessage(),null,AlertType.ERROR);
                a.setTimeout(2000);
                showAlert(a);
            }
        }else if(cmd == exitCommand){
            exit();
        }
    }
    
    private void showAlert(Alert alert){
        display.setCurrent(alert,main);
    }
    
    private void exit(){

            destroyApp(false);
            notifyDestroyed();

    }
}