这适合初学J2ME者开发手机软件，更有利于对高级界面的掌握和理解。

         主要功能：写短信,发短信,返回,返回时步重新加载短信内容,支持小灵通互发短信。

         测试机型：NOKIA N72  S60 3RD

        package main;

import javax.microedition.io.Connector;
import javax.microedition.lcdui.Alert;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Display;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Form;
import javax.microedition.lcdui.TextBox;
import javax.microedition.lcdui.TextField;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;
import javax.wireless.messaging.MessageConnection;
import javax.wireless.messaging.TextMessage;

public class SendMessage extends MIDlet implements CommandListener {
 public String destAddr;
 private String msg;
 private String sendno;
 private Display dis;
 private Form frm;
 private TextBox content;
 private TextField sendto;
 // private TextField content;
 private Command cmdok, send, exit, back;

 public SendMessage() {
  // TODO Auto-generated constructor stub
  frm = new Form("发送到");
  sendto = new TextField("发送到：", null, 11, TextField.NUMERIC);
  content = new TextBox("发送内容：", "发送内容", 10000, TextField.ANY);
  // 按钮的定义
  cmdok = new Command("确定", 1, Command.OK);
  send = new Command("发送", 1, Command.OK);
  exit = new Command("退出", 2, Command.CANCEL);
  back = new Command("返回", 2, Command.CANCEL);
  // content.setLayout(new BorderLayout(10,10));
  dis = Display.getDisplay(this);
  frm.append(sendto);
  // 发送到添加监听器
  frm.addCommand(send);
  frm.addCommand(back);
  // 短信内容页面添加监听器
  content.addCommand(exit);
  content.addCommand(cmdok);
  // 切换默认界面1
  dis.setCurrent(content);
  /* **************************监听器********************* */
  // 给content添加监听器
  content.setCommandListener(this);
  // 给frm添加监听器
  frm.setCommandListener(this);
 }

 protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
  // TODO Auto-generated method stub

 }

 protected void pauseApp() {
  // TODO Auto-generated method stub

 }

 protected void startApp() throws MIDletStateChangeException {
  // TODO Auto-generated method stub

 }

 public void commandAction(Command cmd, Displayable disa) {
  // TODO Auto-generated method stub
  if (cmd.equals(exit)) {
   this.notifyDestroyed();
  } else if (cmd.equals(cmdok)) {
   dis.setCurrent(frm);
   msg = content.getString();
  } else if (cmd.equals(back)) {
   dis.setCurrent(content);
   content.setString(msg);
  } else if (cmd.equals(send)) {
   sendno = sendto.getString();
   boolean res=SendSMS(sendno,msg);
   if(res){
    dis.setCurrent(new Alert("发送成功！"));
   }else{
    dis.setCurrent(new Alert("发送失败！"));
   }
  }
 }

 public boolean SendSMS(String Number, String Message) { // Number就是手机号码，Message就是短信的内容
  char[] Addr;
  Addr = Number.toCharArray();
  if (Addr[0] == '1' && Addr[1] == '0' && Addr[2] == '6')// 当是小灵通号码（106开头）
   destAddr = "sms://" + Number;
  else { // 当是手机时

   if (Addr[0] != '+')

    destAddr = "sms://+86" + Number;

   if (Addr[0] == '+')

    destAddr = "sms://" + Number;

  }

  boolean result = true;

  try {

   MessageConnection conn = (MessageConnection) Connector.open(destAddr);

   // 设置短信息类型为文本，短信息有文本和二进制两种类型

   TextMessage msg = (TextMessage) conn
     .newMessage(MessageConnection.TEXT_MESSAGE);

   // 设置信息内容

   msg.setAddress(destAddr);

   msg.setPayloadText(Message);

   // 发送

   conn.send(msg);

   result = true;

  } catch (Exception e) {

   result = false;

   // 未处理

  }

  return result;

 }

}