Menyimpan/mengambil gambar ke/dari record store pada JAVA (J2ME)

import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.io.IOException;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.DataInputStream;
import java.io.DataOutputStream;
import javax.microedition.rms.InvalidRecordIDException;
import javax.microedition.rms.RecordStore;
import javax.microedition.rms.RecordStoreException;
import javax.microedition.rms.RecordStoreNotFoundException;
import javax.microedition.rms.RecordStoreNotOpenException;

public class SimpanAmbilGambar extends MIDlet
  implements CommandListener {
   
  private Display display;
  private Form formUtama;
  private RecordStore rs = null;
  private Image image = null;
 
  private final Command cmdKeluar =
    new Command("Keluar", Command.EXIT, 1);
  private final Command cmdKembali =
    new Command("Kembali", Command.BACK, 1);
  private final Command cmdSimpan =
    new Command("Simpan", Command.SCREEN, 1);
  private final Command cmdBuka =
    new Command("Buka", Command.SCREEN, 1);
 
  public SimpanAmbilGambar() {
    display = Display.getDisplay(this);
   
    try {
      rs= RecordStore.openRecordStore("DBGambar", true);
    } catch (RecordStoreException rse) {
      rse.printStackTrace();
    }
   
    formUtama = new Form("Menyimpan Gambar");
   
    try {
      image = Image.createImage("Java.png");
    } catch (IOException ioe) {
      ioe.printStackTrace();
    }
    formUtama.append(image);           
   
    formUtama.addCommand(cmdKeluar);
    formUtama.addCommand(cmdSimpan);
    formUtama.addCommand(cmdBuka);
    formUtama.setCommandListener(this);
  }
   
  public void startApp() {
    display.setCurrent(formUtama);
  }
   
  public void pauseApp() {
  }
   
  public void destroyApp(boolean unconditional) {
  }
   
  public void commandAction(Command c, Displayable s) {
    if (c == cmdKeluar) {
      destroyApp(false);
      notifyDestroyed();
    } else if (c == cmdKembali) {
      display.setCurrent(formUtama);
    } else if (c == cmdSimpan) {
      byte[] b = null;
      Alert alert = new Alert("Simpan Gambar");
      alert.setTimeout(Alert.FOREVER);
     
      try {
        if (simpanGambar(image,
                         image.getWidth(), image.getHeight(),
                         "Java")) {
          alert.setString("Gambar telah tersimpan " +
                          "di dalam record store");
        } else {
          alert.setString("Gambar gagal disimpan " +
                          "ke dalam record store");
        }
      } catch (Exception e) {
        e.printStackTrace();
      }
     
      alert.addCommand(cmdKembali);
      alert.setCommandListener(this);
      display.setCurrent(alert, formUtama);

    } else if (c == cmdBuka) {
      Form formGambar = new Form("Gambar dari Record Store");
     
      Image img =
        ambilGambar(image.getWidth(), image.getHeight());
     
      if (img != null) {
        Image newImage = Image.createImage(img);
        formGambar.append(newImage);
      }
     
      formGambar.addCommand(cmdKembali);
      formGambar.setCommandListener(this);
      display.setCurrent(formGambar);
    }
  }          
 
  public boolean simpanGambar(Image img, int lebar,
                              int tinggi, String nama) {
    if (img == null || lebar < 0 ||
        tinggi < 0 || nama == null) {
      throw new IllegalArgumentException("Terjadi kesalahan " +
                         "pengisian parameter");
    }
     
    int[] dataRGB = new int[lebar * tinggi];
     
    try {
      img.getRGB(dataRGB, 0, lebar, 0, 0, lebar, tinggi);
    } catch (Exception e) {
      return false;
    }
     
    try {
      ByteArrayOutputStream baos = new ByteArrayOutputStream();
      DataOutputStream dos = new DataOutputStream(baos);
      dos.writeUTF(nama);
         
      for (int i=0; i<dataRGB.length; i++) {
        dos.writeInt(dataRGB[i]);
      }
         
      byte[] dataRecord = baos.toByteArray();
         
      rs.addRecord(dataRecord, 0, dataRecord.length);
    } catch (RecordStoreNotFoundException rsnfe) {
      return false;
    } catch (RecordStoreException rse) {
      return false;
    } catch (IOException ioe) {
      return false;
    }
     
    return true;
  }
 
  public Image ambilGambar(int lebar, int tinggi) {
    byte[] data = null;
    String nama = null;
    Image img = null;
    
    try {
      int jumlahRecord = rs.getNumRecords();
      for (int i=1; i < jumlahRecord + 1; i++) {
        if (rs.getRecord(i) != null) {
          data = rs.getRecord(i);
          ByteArrayInputStream bais =
            new ByteArrayInputStream(data);
          DataInputStream dis = new DataInputStream(bais);
          nama = dis.readUTF();
          int sisa = (data.length-nama.getBytes().length-2)/4;
                 
          int[] dataRGB = new int[sisa];
          for (int j=0; j<dataRGB.length; j++) {
            dataRGB[j] = dis.readInt();
          }
                 
          img = Image.createRGBImage(dataRGB, lebar,
                                     tinggi, false);
                 
          bais.reset();
          dis.close();
          dis = null;
        }
      }
    } catch (IOException ioe) {
      ioe.printStackTrace();
    } catch(InvalidRecordIDException irie) {
      irie.printStackTrace();
    } catch (RecordStoreNotOpenException rsnoe) {
      rsnoe.printStackTrace();
    } catch (RecordStoreException rse) {
      rse.printStackTrace();
    }
    
    return img;
  }
 
}