opentablescreen.java

PDA餐饮管理系统,在掌上电脑实现的,可以开台,点菜等多功能模块

package junwei;
import javax.microedition.lcdui.Command;
import javax.microedition.lcdui.CommandListener;
import javax.microedition.lcdui.Displayable;
import javax.microedition.lcdui.Item;
import javax.microedition.lcdui.StringItem;
import javax.microedition.lcdui.TextField;

/**
 * 开台界面
 * @author hong
 *
 */
public class OpenTableScreen extends InputScreen implements CommandListener{

	private static OpenTableScreen instance;

	private static StringItem siTableNo;
	private static TextField textPersonNum;

	synchronized public static OpenTableScreen getInstance() {
		if (instance == null)
			instance = new OpenTableScreen();
		siTableNo.setText(MainScreen.getInstance().getCurTableNo());
		textPersonNum.setString("");
		return instance;
	}

	private OpenTableScreen() {
		super("开台");
		
		siTableNo=new StringItem("桌台号：","",Item.PLAIN);
		append(siTableNo);
		
		textPersonNum = new TextField("请输入人数：","", 10,
				TextField.NUMERIC);
		append(textPersonNum);
		
		addCommand(new Command("确定", Command.OK, 1));
		addCommand(new Command("取消", Command.CANCEL, 1));
		setCommandListener(this);
	}
	
	
	public void commandAction(Command c, Displayable s) {
		String cmd = c.getLabel();
		if (cmd.equals("确定")) {
	 		GetDataThread t = new GetDataThread();
	 		if (textPersonNum.getString().equals(""))
	 		{
	 			showInfo("请输入就餐人数！");
	 			return;
	 		}
			t.init(GetDataThread.rt_work,"OpenTableServlet?tableNo="
					+ siTableNo.getText()+"&posId="	+ MainMidlet.posID
					+"&empID="+MainMidlet.glbUserID+"&personNum="+textPersonNum.getString());
			
			t.start();
		}
   		Navigator.flow(cmd);
	}

}