findrecord.java

基于j2me的手机应用程序-电话本

package PhoneBook;

import java.io.*;
import javax.microedition.io.*;
import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
import javax.microedition.rms.RecordEnumeration;
import javax.microedition.rms.RecordFilter;
import javax.microedition.rms.RecordStore;

public class FindRecord extends Form implements CommandListener {

	private Displayable dis;

	private MIDlet mid;

	private RecordStore rs = null;

	private RecordEnumeration re = null;

	private static final Command findCommand = new Command("查找", Command.OK, 1);

	private static final Command backCommand = new Command("返回", Command.BACK,
			2);


	private TextField tf;

	public FindRecord(Displayable dis,MIDlet mid,RecordStore rs) {
		super("查询记录");
		
		tf = new TextField("输入名字",null, 120,TextField.ANY);
		//设置控件的布局
		tf.setLayout(Item.LAYOUT_NEWLINE_AFTER);		

		this.append(tf);		

		this.dis = dis;
		this.mid = mid;
		this.rs = rs;

		this.addCommand(backCommand);
		this.addCommand(findCommand);
		this.setCommandListener(this);
	}

	

	public void commandAction(Command c, Displayable d) {
		if (c == backCommand) {
			Display.getDisplay(mid).setCurrent(dis);
		}
		if (c == findCommand) {
			
			RecordFilter rf = new FindFilter(tf.getString());
			RecordEnumeration re = null;
			try {
				re = rs.enumerateRecords(rf, null, false);
			} catch (Exception e) {
			}
			//查找成功
			if (re.numRecords() > 0) {
				BookAccount account = null;
				int recordID;
				try {
					byte[] rec;
					recordID = re.nextRecordId();				
					rec = rs.getRecord(recordID);
					account = BookAccount.deserialize(rec);
					StringItem name = new StringItem("姓名：",account.getUserName());
					StringItem mobilePhone = new StringItem("移动电话：",account.getMobilePhone());
					StringItem phone = new StringItem("家庭电话：",account.getPhone());
					StringItem email = new StringItem("电子邮件：",account.getEmail());
					
					name.setLayout(Item.LAYOUT_NEWLINE_AFTER);
					mobilePhone.setLayout(Item.LAYOUT_NEWLINE_AFTER);
					phone.setLayout(Item.LAYOUT_NEWLINE_AFTER);
					email.setLayout(Item.LAYOUT_NEWLINE_AFTER);
					
					this.append(name);
					this.append(mobilePhone);
					this.append(phone);
					this.append(email);					
					account = null;
					re.destroy();

				} catch (Exception e) {
					account = null;
					System.out.println("deserialize error");
				}
			}
		}
	}
	
}