用J2ME实现简单电子邮件发送功能(二)

package com.j2medev.mail;

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.TextBox;
import javax.microedition.midlet.MIDlet;

public class ContentForm extends TextBox implements CommandListener
{
    private MailClient midlet;

    private boolean first = true;

    public static final Command sendCommand = new Command("SEND", Command.ITEM,
            1);

    public ContentForm(String arg0, String arg1, int arg2, int arg3,
            MailClient midlet)
    {
        super(arg0, arg1, arg2, arg3);
        this.midlet = midlet;
        if (first)
        {
            first = false;
            init();
        }

    }

    public void init()
    {
        this.addCommand(sendCommand);
        this.setCommandListener(this);
    }

    public void commandAction(Command cmd, Displayable disp)
    {
        if (cmd == sendCommand)
        {
            String content = this.getString();
            midlet.getMessage().setContent(content);
            System.out.println(midlet.getMessage());
            try
            {
                synchronized (midlet)
                {
                    midlet.notify();
                }

            } catch (Exception e)
            {
            }

        }
    }
}

    最后我们完成MIDlet，在其中包括联网的程序代码，由于本站已经提供了很多关于J2ME联网的介绍，因此这里不再进行更多的解释。

package com.j2medev.mail;

import java.io.DataOutputStream;
import java.io.IOException;

import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import javax.microedition.lcdui.*;
import javax.microedition.io.*;

public class MailClient extends MIDlet
{
    private MainForm mainForm;

    private ContentForm contentForm;

    private Display display;

    private Message message;

    public Message getMessage()
    {
        return message;
    }

    public void setMessage(Message message)
    {
        this.message = message;
    }

    public void displayAlert(String text, AlertType type, Displayable disp)
    {
        Alert alert = new Alert("Application Error");
        alert.setString(text);
        alert.setType(type);
        alert.setTimeout(2000);
        display.setCurrent(alert, disp);

    }

    public ContentForm getContentForm()
    {
        return contentForm;
    }

    public Display getDisplay()
    {
        return display;
    }

    public MainForm getMainForm()
    {
        return mainForm;
    }

    public void initMIDlet()
    {
        MailThread t = new MailThread(this);
        t.start();
        message = new Message();
        display = Display.getDisplay(this);
        mainForm = new MainForm(this, "Simple Mail Client");
        contentForm = new ContentForm("Content", null, 150, TextField.ANY, this);
        display.setCurrent(mainForm);
    }

    protected void startApp() throws MIDletStateChangeException
    {
       
        initMIDlet();

    }

    protected void pauseApp()
    {
       

    }

    protected void destroyApp(boolean arg0) throws MIDletStateChangeException
    {
       

    }

}

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