c0e13405ed9a001b1a36b107245978e8

《J2ME实用教程》 源文件下载 本书没有仅仅局限于J2ME单机游戏的开发

package bankbillClent;

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

import com.chapter16.shared.BillInfo;

public class SignOnUI extends Form implements CommandListener {

	private TextField userNameField;

	private TextField passwordField;

	private Command signOnCommand;
	private Command backCommand;

	private MIDlet midlet;
	private Display display;
	
	private Displayable parent;

	private ProgressObserverUI progressObserverUI;

	public SignOnUI(MIDlet midlet,Displayable parent) {
		super("登陆");

		userNameField = new TextField("用户名:", null, 12, TextField.ANY);
		passwordField = new TextField("密码:", null, 20, TextField.PASSWORD);
		signOnCommand = new Command("登陆", Command.OK, 5);
		backCommand = new Command("返回", Command.BACK, 5);
		this.midlet = midlet;
		this.display = Display.getDisplay(midlet);
		this.parent = parent;
		
		progressObserverUI = new ProgressObserverUI();
		append("请输入你的用户名和密码");
		append(userNameField);
		append(passwordField);
		addCommand(signOnCommand);
		addCommand(backCommand);
		setCommandListener(this);
	}

	public void init() {

		userNameField.setString(null);
		passwordField.setString(null);
	}

	public void commandAction(Command command, Displayable displayable) {
		if(command == signOnCommand){
		signOn(userNameField.getString(), passwordField.getString());
		}
		if(command == backCommand){
			display.setCurrent(parent);
		}
	}

	public void signOn(final String userName, final String password) {
		Thread thread = new Thread() {
			public void run() {
				try {
					System.out.println("处理用户登陆");
					//model.login(userName, password);
					
					BankBillListUI bbui=null; 
					String url = "http://127.0.0.1:8080/TEst/BankBillServlet";
					HTTPCommunication  hc = new HTTPCommunication(url,progressObserverUI);
					
					//显示帐单情况
					if(hc.login(userName,password) == true){
						BillInfo[] binfo = hc.getBillData();
						bbui = new BankBillListUI(midlet,parent,binfo);
						display.setCurrent(bbui);
						
					}else{
						showErrorAlert("登陆不成功，请重新输入用户名和密码!",SignOnUI.this);
					}
					
					//成功登陆则切换到查询和缴费模块
					//关闭progressObserverUI对象
					if(progressObserverUI != null)
						progressObserverUI = null;
					
				} catch (Exception e) {
					showErrorAlert(e.getMessage(), display.getCurrent());
				}
			}

		};

		runWithProgress(thread, "正在登陆", false);
	}

	public void runWithProgress(Thread thread, String title, boolean stoppable) {
		progressObserverUI.init(title, stoppable);
		display.setCurrent(progressObserverUI);
		thread.start();
	}

	private void showErrorAlert(String message, Displayable d) {
		Alert alert = new Alert("错误");

		alert.setType(AlertType.ERROR);
		alert.setTimeout(Alert.FOREVER);
		alert.setString(message);
		display.setCurrent(alert, d);
	}

}