searchformui.java

用J2ME写的一个移动校园管理软件。我是看这个学习J2ME的。现在看来写得不是很好。

/*
 * SearchBookUI.java
 *
 * Created on 2006年8月23日, 下午7:50
 *
 * To change this template, choose Tools | Template Manager
 * and open the template in the editor.
 */

package cn.edu.nwpu.MobileCampusClinet;
import java.util.Vector;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;

/**
 *
 * @author NickJava
 */
public class SearchFormUI extends Form implements CommandListener{
    //处理标志,0为单词,1为图书
    private int flag;
    private TextField searchBook;
    private Vector elementArray;
    private Command OKCommand;
    private Command backCommand;
    private MIDlet midlet;
    private Display display;
    private Displayable displayable;
    private GaugeObserverUI gaugeObserverUI;
    /** Creates a new instance of SearchBookUI */
    public SearchFormUI(String title,String textname,MIDlet midlet,Displayable displayable,int flag) {
        super(title);
        searchBook=new TextField(textname , null , 20,TextField.ANY);
        OKCommand = new Command("确定", Command.OK , 5);
        backCommand = new Command("返回",Command.BACK,5);
        this.midlet=midlet;
        this.flag=flag;
        this.display=Display.getDisplay(midlet);
        this.displayable=displayable;
        gaugeObserverUI = new GaugeObserverUI();
        append(searchBook);
        addCommand(OKCommand);
        addCommand(backCommand);
        setCommandListener(this);
    }
    public void init(){
        searchBook.setString(null);
    }
    public void commandAction(Command c,Displayable d){
        if(c==OKCommand){
            search(searchBook.getString());
        }
        if(c==backCommand){
            display.setCurrent(displayable);
        }
    }
    public void gaugeRun(Thread thread , String title , boolean stop){
        gaugeObserverUI.init(title,stop);
        display.setCurrent(gaugeObserverUI);
        thread.start();
    }
    private void showError(String message, Displayable d){
        Alert alert=new Alert("Error");
        alert.setType(AlertType.ERROR);
        alert.setTimeout(Alert.FOREVER);
        alert.setString(message);
        display.setCurrent(alert,d);
    }
    //处理词典模块和图书馆模块
    public void search(final String element){
        Thread thread = new Thread(){
            public void run(){
                try{
                    HTTPConnection hc=new HTTPConnection(gaugeObserverUI);
                   switch(flag){
                      case 0 :
                            elementArray=hc.getMeaning(element);
                            if(elementArray.size()!=0){
                                ShowListUI meanList= new ShowListUI("单词列表",midlet,displayable,elementArray,flag);
                                display.setCurrent(meanList);
                            }else{
                                showError("没有此单词",displayable);
                            }
                            break;
                      case 1 :
                        elementArray=hc.getBook(element);
                           if(elementArray.size()!=0){
                            ShowListUI bookList=new ShowListUI("图书列表",midlet,displayable,elementArray,flag);
                               display.setCurrent(bookList);
                          }else{
                               showError("没有此图书",displayable);
                       }
                           break;
                    }
                    if(gaugeObserverUI!=null){
                        gaugeObserverUI=null;
                    }
                }catch(Exception e){
                    showError(e.getMessage(),SearchFormUI.this);
                }
            }
        };
        gaugeRun(thread,"正在进行数据同步",false);
    }
}