deleterecord.java

基于WINCE5.0的ARM嵌入式手机上层软件开发

/*
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 * and open the template in the editor.
 */
package PhoneBook;

import java.util.Vector;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.MIDlet;
import javax.microedition.rms.*;

/**
 *
 * @author Administrator
 */
public class DeleteRecord extends List implements CommandListener {

    private Displayable dis;
    private MIDlet mid;
    private RecordStore rs = null;
    private RecordEnumeration re = null;
    private Vector recordIDs = null;
    private int count = 0;
    private static final Command deleteCommand = new Command("删除", Command.OK, 1);
    private static final Command backCommand = new Command("返回", Command.BACK, 2);

    public DeleteRecord(Displayable dis, MIDlet mid, RecordStore rs) {
        super("删除记录", Choice.MULTIPLE);
        this.dis = dis;
        this.mid = mid;
        this.rs = rs;

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

        recordIDs = new Vector();

        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
                byte[] rec;
                int id;
                while (re.hasNextElement()) {
                    count = count + 1;
                    id = re.nextRecordId();
                    recordIDs.addElement(new Integer(id));

                    rec = rs.getRecord(id);
                    //分解数据库记录数据
                    BookAccount account = BookAccount.deserialize(rec);
                    //把名字添加到列表中
                    int index = this.append(account.getUserName(), null);

                }
            } 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 == deleteCommand) {
            if (count == 0) {
                return;
            }

            //进入记录编辑界面
            boolean[] selectedArray = new boolean[count];
            this.getSelectedFlags(selectedArray);
            int i = 0, j = 0;
            for (i = 0; i < count; i++) {
                if (selectedArray[i] == true) {
                    if (!recordIDs.isEmpty()) {
                        j = ((Integer) recordIDs.elementAt(i)).intValue();
                        try {
                            rs.deleteRecord(j);
                            Display.getDisplay(mid).setCurrent(dis);
                        } catch (Exception e) {
                            e.printStackTrace();
                        }

                    }

                }
            }
        }
    }
}