newrecordform.java

不一样的手机名片式电话本,其中包括添加新记录

package PhoneBook;

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

public class NewRecordForm extends Form implements CommandListener {
    private TextField nameField;
    private TextField mobileField;
    private TextField phoneField;
    private TextField emailField;
    private Displayable dis;
    private MIDlet mid;
    private RecordStore rs =null;
    private static final Command saveCommand=new Command ("保存",Command.OK,2);
    private static final Command backCommand=new Command("返回",Command.BACK,3);
    public NewRecordForm (String title,Displayable dis,MIDlet mid ,RecordStore rs){
    	super(title);
    	this.dis=dis;
    	this.mid=mid;
    	this.rs=rs;
    	nameField= new TextField(BookConstant.name,null,25,TextField.ANY);
    	mobileField =new TextField (BookConstant.mobile,null,25,TextField.PHONENUMBER);
    	phoneField=new TextField(BookConstant.phone,null,25,TextField.PHONENUMBER);
    	emailField=new TextField(BookConstant.email,null,25,TextField.EMAILADDR);
    	this.append(nameField);
    	this.append(mobileField);
    	this.append(phoneField);
    	this.append(emailField);
    	this.addCommand(saveCommand);
    	this.addCommand(backCommand);
    	this.setCommandListener(this);
    	
    }
    public void commandAction(Command c,Displayable d)
    {
    	if(c==saveCommand){
    		if(rs!=null){
    			if(nameField.getString().length()==0){
    				Alert a_name=new Alert("提醒","姓名不能为空，请输入姓名",null,AlertType.ERROR);
    				a_name.setTimeout(Alert.FOREVER);
    				Display.getDisplay(mid).setCurrent(a_name);
    				return;
    			}
    			RecordFilter rf=new FindFilter(nameField.getString());
    			RecordEnumeration re=null;
    			try{
    				re=rs.enumerateRecords(rf,null,false);
    				
    			}catch (Exception e){
    				
    			}
    			if(re.numRecords()>0){
    				Alert a_same=new Alert("提醒","你输入的姓名已经存在，请输入其他名字",null,AlertType.ERROR);
    				a_same.setTimeout(Alert.FOREVER);
    				Display.getDisplay(mid).setCurrent(a_same);
    				re.destroy();
    				return;
    			}
    			BookAccount account=new BookAccount(nameField.getString(),mobileField.getString(),emailField.getString(),phoneField.getString());
    			try{
    				byte[] rec=account.serialize();
    				rs.addRecord(rec,0,rec.length);
    				Display.getDisplay(mid).setCurrent(dis);
    			}catch (Exception e){
    				
    			}
    		}
    	}else if(c==backCommand){
    		Display.getDisplay(mid).setCurrent(dis);
    	}
    }
}