?? itemselectionscreen.java
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package example.pim;import java.util.Enumeration;import java.util.Vector;import javax.microedition.lcdui.Command;import javax.microedition.lcdui.CommandListener;import javax.microedition.lcdui.Display;import javax.microedition.lcdui.Displayable;import javax.microedition.lcdui.List;import javax.microedition.midlet.MIDlet;import javax.microedition.pim.Contact;import javax.microedition.pim.ContactList;import javax.microedition.pim.Event;import javax.microedition.pim.EventList;import javax.microedition.pim.PIM;import javax.microedition.pim.PIMException;import javax.microedition.pim.PIMItem;import javax.microedition.pim.PIMList;import javax.microedition.pim.ToDo;import javax.microedition.pim.ToDoList;/** * Demonstrate the use of JSR 75 PIM APIs */public class ItemSelectionScreen extends List implements CommandListener { private final Command selectCommand = new Command("Select", Command.ITEM, 1); private final Command backCommand = new Command("Back", Command.BACK, 1); private final Command removeCommand = new Command("Delete", Command.SCREEN, 3); private final Command newCommand = new Command("New", Command.SCREEN, 2); private final PIMDemo midlet; private final Displayable caller; private final int listType; private final PIMList list; private final Vector itemList = new Vector(); public ItemSelectionScreen(PIMDemo midlet, Displayable caller, int listType, PIMList list) throws PIMException { super("Select a PIM item", List.IMPLICIT); this.midlet = midlet; this.caller = caller; this.listType = listType; this.list = list; populateList(); addCommand(backCommand); addCommand(newCommand); setCommandListener(this); } void populateList() { new Thread(new Runnable() { public void run() { synchronized (ItemSelectionScreen.this) { try { deleteAll(); removeCommand(selectCommand); removeCommand(removeCommand); itemList.removeAllElements(); for (Enumeration items = list.items(); items.hasMoreElements();) { PIMItem item = (PIMItem)items.nextElement(); int fieldCode = 0; switch (listType) { case PIM.CONTACT_LIST: fieldCode = Contact.FORMATTED_NAME; break; case PIM.EVENT_LIST: fieldCode = Event.SUMMARY; break; case PIM.TODO_LIST: fieldCode = ToDo.SUMMARY; break; } String label = getDisplayedField(item); if (label == null) { label = "<Incomplete data>"; } append(label, null); itemList.addElement(item); } if (size() > 0) { setSelectCommand(selectCommand); addCommand(removeCommand); } } catch (PIMException e) { midlet.reportException(e, ItemSelectionScreen.this); } } } }).start(); } public void commandAction(Command command, Displayable displayable) { if (command == backCommand) { Display.getDisplay(midlet).setCurrent(caller); } else if (command == selectCommand) { try { PIMItem item = (PIMItem)itemList.elementAt(getSelectedIndex()); Displayable screen = new ItemDisplayScreen(midlet, this, item); Display.getDisplay(midlet).setCurrent(screen); } catch (Exception e) { midlet.reportException(e, this); } } else if (command == removeCommand) { new Thread(new Runnable() { public void run() { synchronized (ItemSelectionScreen.this) { try { PIMItem item = (PIMItem)itemList.elementAt(getSelectedIndex()); switch (listType) { case PIM.CONTACT_LIST: ((ContactList)list).removeContact((Contact)item); break; case PIM.EVENT_LIST: ((EventList)list).removeEvent((Event)item); break; case PIM.TODO_LIST: ((ToDoList)list).removeToDo((ToDo)item); break; } } catch (Exception e) { midlet.reportException(e, ItemSelectionScreen.this); } } } }).start(); populateList(); } else if (command == newCommand) { new Thread(new Runnable() { public void run() { try { PIMItem item = null; switch (listType) { case PIM.CONTACT_LIST: item = ((ContactList)list).createContact(); break; case PIM.EVENT_LIST: item = ((EventList)list).createEvent(); break; case PIM.TODO_LIST: item = ((ToDoList)list).createToDo(); break; } int fieldCode = getDisplayedFieldCode(); item.addString(fieldCode, PIMItem.ATTR_NONE, ""); Displayable screen = new ItemDisplayScreen(midlet, ItemSelectionScreen.this, item); Display.getDisplay(midlet).setCurrent(screen); } catch (Exception e) { midlet.reportException(e, ItemSelectionScreen.this); } } }).start(); } } int getDisplayedFieldCode() { int fieldCode = 0; switch (listType) { case PIM.CONTACT_LIST: fieldCode = Contact.FORMATTED_NAME; break; case PIM.EVENT_LIST: fieldCode = Event.SUMMARY; break; case PIM.TODO_LIST: fieldCode = ToDo.SUMMARY; break; } return fieldCode; } void fixDisplayedField(PIMItem item) { int fieldCode = getDisplayedFieldCode(); if (listType == PIM.CONTACT_LIST) { boolean defined = false; if (item.countValues(fieldCode) != 0) { String s = item.getString(fieldCode, 0); if ((s != null) && (s.trim().length() > 0)) { defined = true; } } if (!defined) { // try to fill in the values from NAME if (item.countValues(Contact.NAME) != 0) { String[] a = item.getStringArray(Contact.NAME, 0); if (a != null) { StringBuffer sb = new StringBuffer(); if (a[Contact.NAME_GIVEN] != null) { sb.append(a[Contact.NAME_GIVEN]); } if (a[Contact.NAME_FAMILY] != null) { if (sb.length() > 0) { sb.append(" "); } sb.append(a[Contact.NAME_FAMILY]); } String s = sb.toString().trim(); if (s.length() > 0) { if (item.countValues(fieldCode) == 0) { item.addString(fieldCode, Contact.ATTR_NONE, s); } else { item.setString(fieldCode, 0, Contact.ATTR_NONE, s); } } } } } } } String getDisplayedField(PIMItem item) { int fieldCode = getDisplayedFieldCode(); fixDisplayedField(item); String fieldValue = null; if (item.countValues(fieldCode) != 0) { String s = item.getString(fieldCode, 0); if ((s != null) && (s.trim().length() != 0)) { fieldValue = s; } } return fieldValue; }}?? 快捷鍵說(shuō)明
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