How to save & delete a Bitmap image in Blackberry Storm?

Question

I have a ready Bitmap image. Now I want to save & delete it. I m doing it like..

FileConnection fconn = (FileConnection)Connector.open("file:///store/home/user/StoredBitmap/"+picIndex+".bmp",Connector.READ_WRITE);

        if(!fconn.exists())
            fconn.create();

        OutputStream out = fconn.openOutputStream();

       if(image == null)
            System.out.println("    image null  ");
       else
       {
            out.write(byte[]);
            out.close();
       }

        fconn.close();

For Blackberry Storm device & simulator, which path to give instead of

"file:///store/home/user/StoredBitmap/"+picIndex+".bmp"

I have a created Bitmap. In outputStream, how to write it?

I m using Blackberry 4.7 (Version: 4.7.0.41). In its simulator, how to save the Bitmap? I m doing it for Blackberry Storm.

& for deleting that Bitmap, can we use File class or we've to use FileConnection class?

Answer 1

Take a look at this (write/read/delete)

class Scr extends MainScreen implements FieldChangeListener {
    ButtonField mWrite;
    ButtonField mRead;
    ButtonField mDelete;

    String mFileName = System.getProperty("fileconn.dir.photos") 
         + "test.bmp";

    public Scr() {
     mWrite = new ButtonField("Write file", 
              ButtonField.CONSUME_CLICK);
     add(mWrite);
     mWrite.setChangeListener(this);

     mRead = new ButtonField("Read file", 
              ButtonField.CONSUME_CLICK);
     add(mRead);
     mRead.setChangeListener(this);

     mDelete = new ButtonField("Delete file", 
              ButtonField.CONSUME_CLICK);
     add(mDelete);
     mDelete.setChangeListener(this);
    }

    public void fieldChanged(Field field, int context) {
     if (mWrite == field) {
      byte[] bytes = new byte[] { 1, 2, 1, 1 };
      writeFile(bytes, mFileName);
      Dialog.inform("File " + mFileName + " saved");
     } else if (mRead == field) {
      byte[] bytes = readFile(mFileName);
      if (null != bytes)
       Dialog.inform("File " + mFileName + " opened");
     } else if (mDelete == field) {
      deleteFile(mFileName);
      Dialog.inform("File " + mFileName + " deleted");
     }

    }

    private void writeFile(byte[] data, String fileName) {
     FileConnection fconn = null;
     try {
      fconn = (FileConnection) Connector.open(fileName,
        Connector.READ_WRITE);
     } catch (IOException e) {
      System.out.print("Error opening file");
     }

     if (fconn.exists())
      try {
       fconn.delete();
      } catch (IOException e) {
       System.out.print("Error deleting file");
      }
     try {
      fconn.create();
     } catch (IOException e) {
      System.out.print("Error creating file");
     }
     OutputStream out = null;
     try {
      out = fconn.openOutputStream();
     } catch (IOException e) {
      System.out.print("Error opening output stream");
     }

     try {
      out.write(data);
     } catch (IOException e) {
      System.out.print("Error writing to output stream");
     }

     try {
      fconn.close();
     } catch (IOException e) {
      System.out.print("Error closing file");
     }
    }

    private byte[] readFile(String fileName) {
     byte[] result = null;
     FileConnection fconn = null;
     try {
      fconn = (FileConnection) Connector.open(fileName, 
                   Connector.READ);
     } catch (IOException e) {
      System.out.print("Error opening file");
     }

     if (!fconn.exists()) {
      Dialog.inform("file not exist");
     } else {

      InputStream in = null;
      ByteVector bytes = new ByteVector();
      try {
       in = fconn.openInputStream();
      } catch (IOException e) {
       System.out.print("Error opening input stream");
      }

      try {
       int c = in.read();
       while (-1 != c) {
        bytes.addElement((byte) c);
        c = in.read();
       }
       result = bytes.getArray();
      } catch (IOException e) {
       System.out.print("Error reading input stream");
      }

      try {
       fconn.close();
      } catch (IOException e) {
       System.out.print("Error closing file");
      }
     }
     return result;
    }

    private void deleteFile(String fileName) {
     FileConnection fconn = null;
     try {
      fconn = (FileConnection) Connector.open(fileName,
        Connector.READ_WRITE);
     } catch (IOException e) {
      System.out.print("Error opening file");
     }

     if (!fconn.exists()) {
      Dialog.inform("file not exist");
     } else {
      try {
       fconn.delete();
      } catch (IOException e1) {
       System.out.print("Error deleting file");
      }

      try {
       fconn.close();
      } catch (IOException e) {
       System.out.print("Error closing file connection");
      }
     }
    }

Answer 2

I did the same as ur code for buttonFields.

But no effect for button touch only its invoked if i get focus on it & click Enter. I m testing it on Blackberry 4.7.0.41

& I m saving the image like..

private void saveBitmap(int picIndex, Bitmap bmp) 
{
    try
    {
        FileConnection fconn = (FileConnection)Connector.open(PHOTO_DIR + picIndex + EXTENSION, Connector.READ_WRITE); 

        if(!fconn.exists())
            fconn.create();

        OutputStream out = fconn.openOutputStream();
        byte[] bitmapBuffer = getBytesFromBitmap(bmp);
        Bitmap bitmapImage = Bitmap.createBitmapFromBytes(bitmapBuffer,0,bitmapBuffer.length,1);
        //EncodedImage encodedImage =  EncodedImage.createEncodedImage(bitmapBuffer,0,bitmapBuffer.length);
        //Bitmap bitmapImage = encodedImage.getBitmap();

       if(bitmapImage == null)
            System.out.println("    image null  ");
       else
       {
            out.write(bitmapBuffer);
            out.close();
       }

        fconn.close();
    }
    catch(Exception e){
        System.out.println("  Exception while saving Bitmap:: "+e.toString());
        e.getMessage();
    }
}


public byte[] getBytesFromBitmap(Bitmap bmp) { 
try {
        int height=bmp.getHeight();
        int width=bmp.getWidth();
        int[] rgbdata = new int[width*height];
        ByteArrayOutputStream bos = new ByteArrayOutputStream();
        DataOutputStream dos = new DataOutputStream(bos);
        //Graphics g = new Graphics(bmp);
        bmp.getARGB(rgbdata,0,width,0,0,width,height);

        for (int i = 0; i < rgbdata.length ; i++) {
            if (rgbdata[i] != -1)
            {
                dos.writeInt(rgbdata[i]);
                dos.flush();
                }
            } 
        bos.flush();
        return bos.toByteArray(); 
    } catch (Exception ex) {
             return null; } 
}

But

java.lang.IllegalArgumetException

is coming for

Bitmap.createBitmapFromBytes(bitmapBuffer,0,bitmapBuffer.length,1);
&
EncodedImage encodedImage =    EncodedImage.createEncodedImage(bitmapBuffer,0,bitmapBuffer.length);
        Bitmap bitmapImage = encodedImage.getBitmap();

Any clues why this Exception is coming?

Answer 3

I m saving Bitmap image like..

private void saveBitmap(int picIndex, Bitmap bmp) 
{
try
{
 String PHOTO_DIR = System.getProperty ("fileconn.dir.photos"); 
 String EXTENSION = ".bmp";
 String filePath = PHOTO_DIR + picIndex + EXTENSION;

 FileConnection fconn = (FileConnection)Connector.open(filePath, 
                               Connector.READ_WRITE); 

 if(!fconn.exists())
     fconn.create();

 OutputStream outputStream = fconn.openOutputStream();

 // bitmap to byte array conversion    
 PNGEncoder encoder = new PNGEncoder(bmp, true);
 byte[] bitmapBuffer = encoder.encode(true);

 outputStream.write(bitmapBuffer);
 outputStream.close();
 fconn.close();
}
catch(Exception e)
{
 System.out.println("  Exception while saving Bitmap:: "+e.toString());
}
}

, the bimap is saved in Media->Pictures->Pictures Folder->1.bmp

but when clicked on it to view, error comes on console as

Unable to create EncodedImage for: /store/home/user/pictures/1.bmp

I m working in Blackberry JDE 4.7.0.41 & tested in Blackberry 9500, 9530 Simulators & Strom 9500 device but its not working. The same above problem is coming.

Not getting what may be the problem. Plz suggest.