updateuserdatascreen.java

来自「JAVA手机PDA程序设计入门书籍源代码」· Java 代码 · 共 43 行

import javax.microedition.io.*;
import java.io.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
public class UpdateUserDataScreen extends Form implements CommandListener
{
	private static Displayable instance ;
	synchronized public static Displayable getInstance()
	{
		if(instance == null)
			instance = new UpdateUserDataScreen() ;
		return instance ;
	} 
	private TextField id ;
	private TextField pw ;
	private TextField ds ;
	private UpdateUserDataScreen()
	{
		super("增加用户") ;
		id = new TextField("代号(最多8个字)","",8,TextField.ANY) ;
		append(id) ;
		pw = new TextField("密码(最多8个字)","",8,TextField.PASSWORD) ;
		append(pw) ;
		ds = new TextField("描述(最多20个字)","",20,TextField.ANY) ;
		append(ds) ;
		addCommand(new Command("回主功能",Command.BACK,1)) ;
		addCommand(new Command("更新",Command.SCREEN,1)) ;
		setCommandListener(this) ;
	}
	public void commandAction(Command c,Displayable s)
	{
		String cmd = c.getLabel() ;
		if(cmd.equals("更新"))
		{
			String url = Navigator.midlet.getAppProperty("midletuserdataupdateurl") ;
			UpdateUserDataThread t = new UpdateUserDataThread(url,id.getString(),pw.getString(),ds.getString()) ;
			t.start() ;
		}else
		{
			Navigator.flow(cmd) ;
		}
	}
}