editscreen.java

java 的手机通讯录程序

import javax.microedition.lcdui.*;
import java.io.IOException;

public class EditScreen extends Form implements CommandListener
{
  private Command selectCommand, commitCommand, backCommand;
  private ChoiceGroup recStore;
  private String[] table;
  private TextField name, phone;
  private String stname, stphone, recordno;
  private int selection;
  public EditScreen()
  {
    super("Edit Screen");
    try
    {
      selectCommand = new Command("Select record", Command.SCREEN, 0);
      commitCommand = (new Command("Commit", Command.SCREEN, 1));
      backCommand = (new Command("Back", Command.BACK, 1));
      addCommand(selectCommand);
      addCommand(commitCommand);
      addCommand(backCommand);
      name = new TextField("Name:     ", "", 10, TextField.ANY);
      phone = new TextField("number: ", "", 10, TextField.ANY);
      setCommandListener(this);
      table = TelephoneListMIDlet.pd.readRecordStore();
      recStore = new ChoiceGroup("", ChoiceGroup.EXCLUSIVE, table, null);
      append("select the record you want to edit by using the up an down arrows and then pressing SELECT");
      append(recStore);
      append(
          "press menu and 'Select Record', edit the record then press menu and 'Commit'");
    }
    catch (Exception e)
    {
      e.printStackTrace();
    }
  }

  public void commandAction(Command c, Displayable d)
  {
    if (c == selectCommand)
    {
      selection = recStore.getSelectedIndex();
      name.setString(TelephoneListMIDlet.pd.getName(table[selection]));
      phone.setString(TelephoneListMIDlet.pd.getTelno(table[selection]));
      recordno = TelephoneListMIDlet.pd.getRecno(table[selection]);
      append(name);
      append(phone);
    }
    else if (c == commitCommand)
    {
      stname = name.getString();
      stphone = phone.getString();
      byte[] rec = (stname + ";" + stphone).getBytes();
      TelephoneListMIDlet.pd.editRecord(Integer.parseInt(recordno), rec, rec.length);
    }
    else if (c == backCommand)
    {
      Display.getDisplay(TelephoneListMIDlet.instance).setCurrent(
          TelephoneListMIDlet.instance.getForm());
    }

  }
}