scan03.java

J2ME的源码！我以前学习J2ME的源码哈！非常适合初学者

package flow;

import java.io.ByteArrayInputStream;
import java.io.DataInputStream;
import java.io.IOException;

import javax.microedition.lcdui.Choice;
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.rms.InvalidRecordIDException;
import javax.microedition.rms.RecordEnumeration;
import javax.microedition.rms.RecordStore;
import javax.microedition.rms.RecordStoreException;
import javax.microedition.rms.RecordStoreFullException;
import javax.microedition.rms.RecordStoreNotFoundException;
import javax.microedition.rms.RecordStoreNotOpenException;

import rms.Account;

public class scan03 extends List implements CommandListener {
	private Display display;

	private List main;

	private RecordStore recordStore;

	int recordId;

	Command lookcmd = new Command("查阅详情", Command.OK, 3);

	Command backcmd3 = new Command("返回", Command.BACK, 5);

	public scan03(Display display3, List main3) {

		super("浏览信息", Choice.IMPLICIT);

		this.display = display3;
		this.main = main3;

		// setSelectedIndex(1, true);
		readInfo();
		addCommand(lookcmd);
		addCommand(backcmd3);
		setCommandListener(this);
	}

	public void commandAction(Command c1, Displayable arg1) {
		if (c1 == backcmd3) {
			display.setCurrent(main);

		} else if (c1 == lookcmd) {
			readInfo();
		}

	}

	public void readInfo() {
		try {
			recordStore = RecordStore.openRecordStore("tel", true);// 在每一个新程序中,需先打开数据库然后再进行其它程序的写入
		} catch (RecordStoreFullException e1) {
			e1.printStackTrace();
		} catch (RecordStoreNotFoundException e1) {
			e1.printStackTrace();
		} catch (RecordStoreException e1) {
			e1.printStackTrace();
		}
		RecordEnumeration re = null;// RecordEnumeration枚举函数,在读取时使用
		try {
			re = recordStore.enumerateRecords(null, null, true);// 过滤,比较,更新
		} catch (RecordStoreNotOpenException e1) {
			e1.printStackTrace();
		}
		while (re.hasNextElement()) {
			byte[] data = null;
			try {
				data = re.nextRecord();
			} catch (InvalidRecordIDException e1) {
				e1.printStackTrace();
			} catch (RecordStoreNotOpenException e1) {
				e1.printStackTrace();
			} catch (RecordStoreException e1) {
				e1.printStackTrace();
			}

			Account ra = Account.decode(data);//先由Account声明ra ,再由ra接收Account.decode(data)
			//因decode属于取出的方法,故不能像AddFirend02中的encode那样使用
			append("姓名:" + ra.getName(), null);//这里的返回值getName,getTel..因调用的是Account类,所以可以与之前定义的这几个方法名不相同
			append("移动电话:" + ra.getTel(), null);
			append(ra.getMobileTel(), null);
			append(ra.getEmail(), null);
		}

		//			ByteArrayInputStream bis = new ByteArrayInputStream(data);
		//			DataInputStream dis = new DataInputStream(bis);
		//			try {
		//				String name = dis.readUTF();
		//				String mobile = dis.readUTF();
		//				String phone02 = dis.readUTF();
		//				String email02 = dis.readUTF();
		//				append("姓名:" + name, null);
		//				append("移动电话:" + mobile, null);
		//				// append(phone02, null);
		//				// append(email02, null);

		//			}
		//			catch (IOException e) {
		//				e.printStackTrace();
		//			}
	}
}