ContactListThread,show all contact name and mobile number

ContactListThread

package dongyuwei.contact;

import java.util.Enumeration;

import javax.microedition.pim.Contact;
import javax.microedition.pim.ContactList;
import javax.microedition.pim.PIM;
import javax.microedition.pim.PIMException;
import net.rim.device.api.ui.UiApplication;

public class ContactListThread extends Thread {
	Screen mainScreen;

	public ContactListThread(Screen mainScreen) {
		this.mainScreen = mainScreen;
	}
	public void run() {
		synchronized (UiApplication.getEventLock()) {
			mainScreen.appendLabelText(getContacts());
		}
	}

	private String getContacts() {
		StringBuffer sb = new StringBuffer();
		try {
			ContactList contactList = (ContactList) (PIM.getInstance()
					.openPIMList(PIM.CONTACT_LIST, PIM.READ_WRITE));
			Enumeration enumx = contactList.items();
			while (enumx.hasMoreElements()) {
				Contact contact = (Contact) enumx.nextElement();
				String fullName = "";
				StringBuffer telephone = new StringBuffer();
				if (contactList.isSupportedField(Contact.NAME)) {
					String[] name = contact.getStringArray(Contact.NAME, 0);
					String firstName = name[Contact.NAME_GIVEN];
					String lastName = name[Contact.NAME_FAMILY];
					if (firstName == null) {
						firstName = "";
					}
					if (lastName == null) {
						lastName = "";
					}
					fullName = firstName + " " + lastName;
				}

				if (contactList.isSupportedField(Contact.TEL)) {
					int emailCount = contact.countValues(Contact.TEL);
					for (int i = 0; i < emailCount; i++) {
						String tel = contact.getString(Contact.TEL, i);
						if (tel != null) {
							telephone.append(tel.trim());
							telephone.append(";");
						}
					}
				}
				sb.append(fullName.trim()).append(": ").append(telephone).append("\n");
			}
		} catch (PIMException ex) {
			ex.printStackTrace();
		}

		return sb.toString();
	}
}