listrecord.java

基于j2me的手机应用程序-电话本

/*
 * 记录列表
 */

package PhoneBook;

import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;
import javax.microedition.rms.*;

public class ListRecord extends List implements CommandListener {

	private Displayable dis;

	private MIDlet mid;

	private RecordStore rs = null;

	private RecordEnumeration re = null;

	private static final Command lookCommand = new Command("查看", Command.OK, 1);

	private static final Command backCommand = new Command("返回", Command.BACK,
			2);
	//父屏幕的参数是dis
	public ListRecord(String title, int listType, Displayable dis, MIDlet mid,
			RecordStore rs) {
		super(title, listType);
		this.dis = dis;
		this.mid = mid;
		this.rs = rs;

		this.addCommand(backCommand);
		this.addCommand(lookCommand);
		this.setCommandListener(this);

		SortComparator sortCom = new SortComparator();
		if (rs != null) {
			try {
				Image icon = Image.createImage("/txt.png");
				//按照名字的字符串大小排序
				re = rs.enumerateRecords(null, sortCom, true);
				//添加列表项
				while (re.hasNextElement()) {
					//分解数据库记录数据
					BookAccount account = BookAccount.deserialize(re
							.nextRecord());
					//把名字添加到列表中
					int index = this.append(account.getUserName(), icon);

				}
			} catch (Exception e) {
			} finally {
				if (re != null)
					re.destroy();
			}
		}

	}

	public void commandAction(Command c, Displayable d) {
		if (c == backCommand) {
			Display.getDisplay(mid).setCurrent(dis);
		}
		if (c == lookCommand) {
			//进入记录编辑界面
			EditDetailInfo edInfo = new EditDetailInfo("查看和修改记录", this, mid,
					rs, this.getString(this.getSelectedIndex()));
			Display.getDisplay(mid).setCurrent(edInfo);
		}
	}

}