j2me的form，list和command的综合运用

来源：互联网发布：索尼降噪豆测评知乎编辑：程序博客网时间：2024/06/06 01:57

import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;
import javax.microedition.midlet.MIDletStateChangeException;

public class mianApp extends MIDlet implements CommandListener{

private List lis;
private Command cmd_ture;
private Command cmd_back;
private Form f;
private Display dis;
public mianApp()
{
  lis=new List("我的列表",List.MULTIPLE);
  lis.append("选项2",null);
  lis.append("选项1",null);
  lis.append("选项3",null);
  lis.append("选项4",null);
  lis.append("选项5",null);
  lis.append("选项6",null);
  cmd_ture=new Command("确定",Command.SCREEN,1);
  cmd_back=new Command("返回",Command.SCREEN,1);

  lis.addCommand(cmd_ture);
  lis.setCommandListener(this);
  f=new Form("我的选择有如下：");
  f.addCommand(cmd_back);
  f.setCommandListener(this);
  dis=Display.getDisplay(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
dis.setCurrent(lis);
}

public void commandAction(Command arg0, Displayable arg1) {
  // TODO Auto-generated method stub
  if(arg0==cmd_ture)
  {
   f.deleteAll();
   int size=lis.size();
   for(int i=0;i<size;i++)
   {
    if(lis.isSelected(i))
    {
     f.append(lis.getString(i));
    }
   }
   dis.setCurrent(f);
  }
  if(arg0==cmd_back)
  {
   dis.setCurrent(lis);
  }
}

}