myaddressbook.java

J2ME开发的通讯簿程序！ 在Eclipse下开发的~！

/*
 * 创建日期 2005-9-23
 *
 * TODO 要更改此生成的文件的模板，请转至
 * 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */
package src;


import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import javax.microedition.midlet.MIDletStateChangeException;
import javax.microedition.rms.*;
import java.io.*;

/**
 * @author 钟宁林
 *
 * TODO 要更改此生成的类型注释的模板，请转至
 * 窗口 － 首选项 － Java － 代码样式 － 代码模板
 */
public class MyAddressBook extends MIDlet implements CommandListener {

	/**
	 * 
	 */
	private Display display;
	String dbname = "MyAddressBook";
	String current = "";
	
	Form addForm = new Form("添加资料");
	TextField tf1 = new TextField("姓名","",20,TextField.ANY);
	TextField tf2 = new TextField("电话","",15,TextField.NUMERIC);
	
	public MyAddressBook() {
		super();
		// TODO 自动生成构造函数存根
		
		display = Display.getDisplay(this);
	}

	/* （非 Javadoc）
	 * @see javax.microedition.midlet.MIDlet#startApp()
	 */
	protected void startApp() throws MIDletStateChangeException {
		// TODO 自动生成方法存根
		Command add = new Command("确定",Command.SCREEN,1);
		Command back = new Command("返回上页",Command.SCREEN,2);
		
		addForm.append(tf1);
		addForm.append(tf2);
		addForm.addCommand(add);
		
		addForm.addCommand(back);
		addForm.setCommandListener(this);
		MainForm();

		
	}
	
	public void MainForm()
	{
		List l = new List("我的通讯簿",Choice.IMPLICIT);
		l.append("通讯簿列表",null);
		l.append("添加资料",null);
		l.setCommandListener(this);
		current = "MainForm";
		display.setCurrent(l);
		
	}
	
	public void ListAllForm()
	{
		List l = new List("通讯簿列表",Choice.EXCLUSIVE);
		Command back = new Command ("回上页",Command.SCREEN,2);
		l.addCommand(back);
		l.setCommandListener(this);
		RecordStore rs = openRSAnyway(dbname);
		
		if(rs == null)
		{
			notifyDestroyed();
		}
		else
		{
			try
			{
				RecordEnumeration re = rs.enumerateRecords(null,null,false);
				FriendData data = new FriendData();
				if(re.numRecords() == 0)
				{
					l.append("没有任何资料",null);
					current = "ListAllForm";
					display.setCurrent(l);
					return ;
				}
				while(re.hasNextElement())
				{
					byte tmp[] =re.nextRecord();
					data.decode(tmp);
					l.append(data.name,null);
				}
				
				rs.closeRecordStore();
				
			}catch(Exception e){
				
							}
		}
		Command info = new Command("详细",Command.SCREEN,1);
		l.addCommand(info);
		current = "ListAllForm";
		display.setCurrent(l);
	}
	
	public void AddForm()
	{
		current = "AddFrom";
		display.setCurrent(addForm);
	}

	/* （非 Javadoc）
	 * @see javax.microedition.midlet.MIDlet#pauseApp()
	 */
	protected void pauseApp() {
		// TODO 自动生成方法存根

	}

	/* （非 Javadoc）
	 * @see javax.microedition.midlet.MIDlet#destroyApp(boolean)
	 */
	protected void destroyApp(boolean arg0) throws MIDletStateChangeException {
		// TODO 自动生成方法存根

	}

	/* （非 Javadoc）
	 * @see javax.microedition.lcdui.CommandListener#commandAction(javax.microedition.lcdui.Command, javax.microedition.lcdui.Displayable)
	 */
	public void commandAction(Command c, Displayable s) 
	{
		// TODO 自动生成方法存根
        if(c == List.SELECT_COMMAND && current.equals("MainForm"))
        {
        	List tmp = (List) s;
        	switch(tmp.getSelectedIndex())
			{
        	  case 0:
        	  	ListAllForm();
        	  	break;
        	  case 1:
        	  	AddForm();
        	  	break;     	      	  	
			}
        
        }
        
        if(c.getLabel().equals("回上页"))
        {
        	MainForm();
        }
        
        if(c.getLabel().equals("确定"))
        {
        	addData();
        	ListAllForm();
        }
        
        if(c.getLabel().equals("详细"))
        {
        	List tmp = (List) s ;
        	searchData(tmp.getString(tmp.getSelectedIndex()));
        }
                       	  	
			       
	
	}
	
	public void searchData(String name)
	{
		Form f = new Form("详细");
		Command back = new Command("回上页",Command.SCREEN,1);
		f.addCommand(back);
		f.setCommandListener(this);
		RecordStore rs = openRSAnyway(dbname);
		if(rs == null)
		{
			notifyDestroyed();
		}else
		{
			try
			{
				RecordEnumeration re = rs.enumerateRecords(null,null,false);
				FriendData data = new FriendData();
				while(re.hasNextElement())
				{
					byte tmp[] = re.nextRecord();
					data.decode(tmp);
					if(data.name.equals(name))
					{
						f.append("姓名:\n");
						f.append(data.name+"\n");
						f.append("电话：\n");
						f.append(data.tel+"\n");
						display.setCurrent(f);
						return ;
					}
				}
				rs.closeRecordStore();
			}
			catch(Exception e)
			{
				
			}
		}
	}
	
	public void addData()
	{
		FriendData data = new FriendData();
		data.name = tf1.getString();
		data.tel = tf2.getString();
		byte []tmp = data.encode();
		RecordStore rs = openRSAnyway(dbname);
		if(rs == null)
		{
			notifyDestroyed();
		}
		else
		{
			try
			{
				rs.addRecord(tmp,0,tmp.length);
				rs.closeRecordStore();
			}
			catch(Exception e)
			{
				e.printStackTrace();
			}
		}
				
	}
	
	public RecordStore openRSAnyway(String rsname)
	{
		RecordStore rs = null;
		if(rsname.length() > 37 )
			return null;
		try
		{
			rs = RecordStore.openRecordStore(rsname,true);
			return rs;
		}
		catch(Exception e)
		{
			e.printStackTrace();
			return null;
		}
	}

}

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)
		{
			e.printStackTrace();
		}
		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)
		{
			e.printStackTrace();
		}
	}
}