J2ME:介绍Item各个原件的功能

来源：互联网发布：mv linux命令编辑：程序博客网时间：2024/04/30 00:46

package pro4;

import java.io.IOException;
import java.util.Date;

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

public class item extends MIDlet implements CommandListener{

private Form f=new Form("ITEM演示");
    //private Form f2=new Form("图片演示");
private Display dis;
private ChoiceGroup cg=new ChoiceGroup("单选",ChoiceGroup.EXCLUSIVE); //选项
private ChoiceGroup cg2=new ChoiceGroup("下拉",ChoiceGroup.POPUP);
private ChoiceGroup cg3=new ChoiceGroup("多选",ChoiceGroup.MULTIPLE);
private DateField df=new DateField("时间",DateField.DATE_TIME); //时间选项，比较实用
private Gauge ga=new Gauge("音量",true,10,1);    //可手动修改的进度条
private Gauge ga1=new Gauge("文件进度",false,40000,1);   //不可手动修改的进度条
private ImageItem imit;
private TextField tf=new TextField("姓名", "", 6, TextField.ANY);    //必须在form中使用，任意类型
private TextField tf2=new TextField("身份证号", "", 20, TextField.NUMERIC); //限制为数字
private TextField tf3=new TextField("密码", "", 20, TextField.PASSWORD);    //密码框
private StringItem strit=new StringItem("title1", "PLAIN",Item.PLAIN);   //普通样式
private StringItem strit2=new StringItem("title2", "BUTTON",Item.BUTTON);   //按钮样式
private StringItem strit3=new StringItem("title3", "HYPERLINK",Item.HYPERLINK);   //超链接样式
Image img=null;

public item() throws IOException {
  // TODO Auto-generated constructor stub

  try {
   img = Image.createImage("/25.png");
  } catch (IOException e) {
   // TODO Auto-generated catch block
   e.printStackTrace();
  }
  imit=new ImageItem("显示图片",img,ImageItem.LAYOUT_CENTER|Item.LAYOUT_EXPAND,"加载失败");
}

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

  dis=Display.getDisplay(this);
  dis.setCurrent(f);
  f.append(cg);

  cg.append("男",null);
     cg.append("女", null);


  f.append(cg2);
  cg2.append("男", null);
  cg2.append("女", null);

  f.append(cg3);
  cg3.append("打架", null);
  cg3.append("骂人",null);
  dis.setCurrentItem(cg3);


  f.append(df);
  df.setDate(new Date());

  f.append(ga);
  ga.setValue(6); //设置默认值

  f.append(imit);

  f.append(tf);
  f.append(tf2);
  f.append(tf3);

  f.append(ga1);
  /*while(true)
   {
   ga1.setValue(ga1.getValue()+1);
   if(ga1.getValue()==ga1.getMaxValue())
    break;
   }*/

  f.append(strit);
  f.append(strit2);
  f.append(strit3);
  strit2.addCommand(new Command("",Command.ITEM , 1));
  strit3.addCommand(new Command("",Command.ITEM , 1));
}
public void commandAction(Command arg0, Displayable arg1) {
  // TODO Auto-generated method stub

}

}