addrbookmidlet.java

一個手機地址本程序,一個不可多得的源碼程序,是學習J2ME的好東東.

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";
	private Command cmExit;

	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";
		cmExit=new Command("Eixt",Command.BACK,0);
		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.addCommand(cmExit);
		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, AlertType.ERROR);
			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());
			}

		}
		if(c==cmExit)
		{
			destroyApp(false);
			notifyDestroyed();
			}
	}

	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);
		}
	}
}