mylistener.java

来自「jBuilderX无线应用开发源代码」· Java 代码 · 共 55 行

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

public class MyListener extends MIDlet implements RecordListener{
    private RecordStore rs;              
    private Display display;
    
    public MyListener () {
        rs = null;                  //RecordStore
        display = Display.getDisplay(this);
    }
    
    public void startApp() {
        try {
            rs = RecordStore.openRecordStore("myRecordStore", false);
            //注册RecordListener
            rs.addRecordListener(this);
            ByteArrayOutputStream bos = new ByteArrayOutputStream();
            DataOutputStream dos = new DataOutputStream(bos);
            dos.writeUTF("Listener test string");
            byte [] b = bos.toByteArray();
            int recordID = rs.addRecord(b, 0, b.length);
            rs.deleteRecord(recordID);
        }catch(Exception e){
            System.out.println("Error: " + e.getMessage());
        }
        
        try{
            rs.closeRecordStore();
        }catch(Exception e){
            System.out.println("Error: " + e.getMessage());
        }
    }
        
    public void pauseApp(){
    }
    
    public void destroyApp(boolean unconditional){
    }
    
    //添加记录时的事件通知
    public void recordAdded(RecordStore recordStore, int recordId){
        System.out.println("record " + recordId + " added");
    }
    //修改记录时的事件通知
    public void recordChanged(RecordStore recordStore,int recordId){
    }
    //删除记录时的事件通知
    public void recordDeleted(RecordStore recordStore,int recordId){
        System.out.println("record " + recordId + " deleted");
    }
}