newrecordform.java

基于j2me的手机应用程序-电话本

/*
 * 添加新记录
 */
package PhoneBook;

import javax.microedition.lcdui.*;
import javax.microedition.midlet.*;
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;
		 			}
		 			
		 			//查找是否已经存在相同的名字
		 			RecordFilter rf = new FindFilter(nameField.getString());
		 	        RecordEnumeration re = null;
		 	        try {
		 	          re = rs.enumerateRecords(rf, null, false);
		 	         // if (re.hasNextElement()) {
		 	         //   re.nextRecord();
		 	         // }
		 	        }
		 	        catch (Exception e) {
		 	        }
		 			//如果已经存在一个相同的名字则返回
		 	        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;
		 	        }
		 			//添加一个新记录
		 			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);
		 		
		 	}
	 	
	    }
	
}