addrbookmidlet.java

用JAVA编写的在手机上运行的记事本程序,有存储电话号码、查询号码等功能.

/*
 * AddrBookMIDlet.java
 *
 * Created on 2004年4月9日, 下午12:17
 */

package ground;

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.rms.*;
import java.io.*;
import java.util.Vector;

/**
 * An example MIDlet with simple "Hello" text and an Exit command.
 * Refer to the startApp, pauseApp, and destroyApp
 * methods so see how each handles the requested transition.
 *
 * @author  Xp
 * @version
 */
public class AddrBookMIDlet extends MIDlet implements CommandListener {
    
    private Display display;    // The display for this MIDlet
    String currentForm = "";
    String dbname = "addrbook";

    
    public AddrBookMIDlet() {
        display = Display.getDisplay(this);
    }
    
    /**
     * Start up the Hello MIDlet by creating the TextBox and associating
     * the exit command and listener.
     */
    public void startApp() {
        mainForm();
    }
    
    /**
     * Pause is a no-op since there are no background activities or
     * record stores that need to be closed.
     */
    public void pauseApp() {
    }
    
    /**
     * Destroy must cleanup everything not handled by the garbage collector.
     * In this case there is nothing to cleanup.
     */
    public void destroyApp(boolean unconditional) {
    }
    

    
    public void mainForm()
    {
        currentForm = "mainForm";
        List l = new List("我的电话本", Choice.IMPLICIT);
        l.append("查看所有电话", null);
        l.append("新增电话记录", null);
        l.append("查找电话记录" ,null);
        l.append("退出电话本", null);
        l.setCommandListener(this);
        display.setCurrent(l);
    }
    
    public void listAllForm(String search)  //查看所有电话
    {
        currentForm = "listAllForm";
        //From listForm = new Form("查看所有记录");
        AddrBook addrBook = new AddrBook();
        List l = new List("查看所有记录", Choice.IMPLICIT);
        Command back = new Command("返回", Command.BACK, 0);
        Command ok = new Command("查看", Command.OK, 0);
        AddrBookVct addrBookVct=new AddrBookVct();
        if (search == null)
            addrBookVct = listAddrBook(null, 1);
        else
            addrBookVct = listAddrBook(search, 3);

        l.addCommand(back);
        l.addCommand(ok);
        l.setCommandListener(this);
        //addrBook = addrBookVct.get(0);
        //addrBook.name.equals("No Name")
        
        
        if (addrBookVct.size()==0)
        {
            Alert a = new Alert("提示", "没有记录",null, null);
            a.setTimeout(2000);
            display.setCurrent(a);
            return;
        }
        for (int i = 0; i<addrBookVct.size(); i++)
        {
            l.append(addrBookVct.get(i).name, null);
        }

        display.setCurrent(l);
    }
    
    public void showTelForm(String name)  //查看电话记录详细信息
    {
        currentForm = "showTelForm";
        
        AddrBookVct addrBookVct = listAddrBook(name, 2);
        Command back = new Command("返回", Command.BACK, 0);
        Form f = new Form("详细资料");
        f.append("姓名：\n");
        f.append(addrBookVct.get(0).name + "\n");
        f.append("电话号码：\n");
        f.append(addrBookVct.get(0).tel + "\n");
        
        f.addCommand(back);
        f.setCommandListener(this);
        display.setCurrent(f);
        
    }
    
    public void addTelForm()  //新增电话记录
    {
        currentForm = "addTelForm";
        Form addForm = new Form("新增电话记录");
        TextField tfName = new TextField("姓名", "", 20, TextField.ANY);
        TextField tfTel = new TextField("电话", "", 20, TextField.NUMERIC);
        Command back = new Command("返回", Command.BACK, 0);
        Command ok = new Command("确定", Command.OK, 0);
        //tfTel.getString()
        addForm.append(tfName);
        addForm.append(tfTel);
        addForm.addCommand(ok);
        addForm.addCommand(back);
        addForm.setCommandListener(this);
        display.setCurrent(addForm);
    }
    
    public void searchForm()
    {
        currentForm = "searchForm";
        TextBox t = new TextBox("请输入要查找的姓名", "", 20, 0);
        Command back = new Command("查找", Command.OK, 0);
        Command search = new Command("返回", Command.OK, 0);
        t.addCommand(back);
        t.addCommand(search);
        t.setCommandListener(this);
        display.setCurrent(t);
    }
    
        /*
     * Respond to commands, including exit
     * On the exit command, cleanup and notify that the MIDlet has been destroyed.
     */
    public void commandAction(Command c, Displayable s) {
        //MainForm
        if (c == List.SELECT_COMMAND && currentForm.equals("mainForm"))
        {
            List temp = (List) s;
            switch (temp.getSelectedIndex())
            {
                case 0:
                    listAllForm(null);
                    break;
                case 1:
                    addTelForm();
                    break;
                case 2:
                    searchForm();
                    break;
                case 3:
                    destroyApp(false);
                    //notifyDestroyed();
            }
        }
        
        //addTelForm
        if (currentForm.equals("addTelForm"))
        {
            if (c.getLabel().equals("确定"))
            {
                Alert a = new Alert("提示","添加电话记录成功" , null, null);
                a.setTimeout(2000);
                
                Form Temp = (Form) s;
                TextField tf1 = (TextField)Temp.get(0);
                TextField tf2 = (TextField)Temp.get(1);
                //System.out.println(tf1.getString() + " " + tf2.getString());
                //添加记录
                if (tf1.getString().equals(""))
                {
                    a.setString("姓名不能为空");
                    display.setCurrent(a);
                    return;
                }
                if (tf2.getString().equals(""))
                {
                    a.setString("电话不能为空");
                    display.setCurrent(a);
                    return;
                }
                addAddrBook(tf1.getString(), tf2.getString());
                //添加记录完成
                display.setCurrent(a);
                
                tf1.setString("");
                tf2.setString("");
            }
            if (c.getLabel().equals("返回"))
            {
                mainForm();
            }
        }
        
        //listAllForm
        if (currentForm.equals("listAllForm"))
        {
            if (c.getLabel().equals("查看"))
            {
                //System.out.println("ListAllForm show");
                List temp = (List) s;
                //System.out.println(temp.getString(temp.getSelectedIndex()));
                showTelForm(temp.getString(temp.getSelectedIndex()));
            }
            if (c.getLabel().equals("返回"))
            {
                mainForm();
            }
        }
        
        //showTelForm
        if (currentForm.equals("showTelForm"))
        {
            if (c.getLabel().equals("返回"))
            {
                mainForm();
            }
        }
        
        //searchForm
        if (currentForm.equals("searchForm"))
        {
            if (c.getLabel().equals("返回"))
            {
                mainForm();
            }
            if (c.getLabel().equals("查找"))
            {
                TextBox temp = (TextBox)s;
                //System.out.println(temp.getString());
                listAllForm(temp.getString());
            }
            
        }
    }
    
    public RecordStore openRSAnyway(String dbname)
    {
        RecordStore rs = null;
        
        if (dbname.length()>32)
            return null;
        try
        {
            rs = RecordStore.openRecordStore(dbname, true);
            return rs;
        }
        catch(Exception e)
        {
            return null;
        }
    }
    
    public void addAddrBook(String name, String tel)   //写记录
    {
        FriendData data = new FriendData();
        data.name = name;
        data.tel = tel;
        byte[] temp = data.encode();
        
        RecordStore rs = openRSAnyway(dbname);
        
        if (rs == null)
        {
            System.out.println("RecordStore is null");
            return;
        }
        else
        {
            try
            {
                rs.addRecord(temp, 0, temp.length);
                rs.closeRecordStore();
            }
            catch(Exception e)
            {
            }
        }
    }
    
    public AddrBookVct listAddrBook(String listName, int Type)
    {
        //Type 1: 查看所有
        //     2：完全彼配查找
        //     3：模糊查找
        
        RecordStore rs = openRSAnyway(dbname);
        AddrBookVct addrBookVct = new AddrBookVct();
        AddrBook addrBook = new AddrBook();
        int i = 0;
        if (rs == null)
        {
            System.out.println("ListAddrBook rs is null");
        }
        else
        {
            try
            {
                RecordEnumeration re = rs.enumerateRecords(null, null, false);
                
                FriendData data = new FriendData();
                
                if (re.numRecords() == 0)
                {
                    addrBook.name = "No Name";
                    addrBook.tel = "No Tel";
                    addrBookVct.add(addrBook);
                    return addrBookVct;
                }
                
                while (re.hasNextElement())
                {
                    byte temp[] = re.nextRecord();
                    data.decode(temp);
                    addrBook.rsid = i++;
                    addrBook.name = data.name;
                    addrBook.tel = data.tel;
                    //System.out.println("List i:" + i + " name:" + data.name);
                    
                    switch (Type)
                    {
                        case 1:  //查看所有
                            addrBookVct.add(new AddrBook((String)data.name, (String)data.tel));
                            break;
                        case 2:  //完全彼配查找
                            if (data.name.equals(listName))
                            {
                                addrBookVct.add(new AddrBook((String)data.name, (String)data.tel));
                            }
                            break;
                        case 3:  //模糊查找
                            String s = data.name.toUpperCase();

                            int search_i=s.indexOf(listName.toUpperCase());
                            if (search_i>=0)
                            {
                                System.out.println("DATA Name:" + data.name);
                                addrBookVct.add(new AddrBook((String)data.name, (String)data.tel));
                            }
                            System.out.println("search_i:"+ search_i +" DATA Name:" + data.name);
                            break;
                    }
                    
                }
            }catch(Exception e)
            {
                System.out.println("listAddrBook is Error");
            }
        }
        /*System.out.println("TEST");
        for (int j=0; j<addrBookVct.size(); j++)
            System.out.println("J:" + j + "Name:" + addrBookVct.get(j).name);*/
        return addrBookVct;
    }
   

    
    class FriendData
{
    String name;
    String tel;
        
    public FriendData()
    {
        name = "No Name";
        tel = "No Tel";
    }
        
    public byte[] encode()
    {
         byte[] result = null;
         try
         {
             ByteArrayOutputStream bos = new ByteArrayOutputStream();
             DataOutputStream dos = new DataOutputStream(bos);
             dos.writeUTF(name);
             dos.writeUTF(tel);
             result = bos.toByteArray();
             dos.close();
             bos.close();
         }
         catch(Exception e)
         {
         }
         return result;
    }
        
    public void decode(byte[] data)
    {
         try
         {
              ByteArrayInputStream bis = new ByteArrayInputStream(data);
              DataInputStream dis = new DataInputStream(bis);
              name = dis.readUTF();
              tel = dis.readUTF();
              dis.close();
              bis.close();
          }catch(Exception e)
          {
          }
     }
 }


class AddrBook
{
    int rsid;
    String name;
    String tel;
    public  AddrBook()
    {
        rsid = 0;
        name = "No Name";
        tel = "No Tel";
    }
    
    public  AddrBook(String name, String tel)
    {
        this.rsid = 0;
        this.name = name;
        this.tel = tel;
    }
}

class AddrBookVct
{
    Vector vctTemp = new Vector();
    AddrBook addrBook;
    
    public void add(AddrBook a)
    {
        vctTemp.addElement(a);
    }
    
    public int size()
    {
        return vctTemp.size();
    }
    
    public AddrBook get(int i)
    {
        AddrBook a;
        a = (AddrBook)vctTemp.elementAt(i);
        //System.out.println("I:" + i + " GET NAME:" + a.name);
        return (AddrBook)vctTemp.elementAt(i);
    }
}
}