How load and access bitmap images?

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  Hello

  In my application, I get the picture from the server. Now, I want to convert this Bitmap Image to display on the screen. For this I use below codes. But it doesn't give me the same image does not mean with the clarity and the exact size. He's smaller than the picture.

  I used the codes below:

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          Bitmap bmp = null;
          try {
              Logger.out(TAG, "It is inside the the image conversion        " +img);
              Image image = Image.createImage(img);
              byte[] data = BMPGenerator.encodeBMP(image);
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              bmp = Bitmap.createBitmapFromBytes(data, 0, data.length, 1);
              } catch (Exception e) {
              // TODO Auto-generated catch block
              e.printStackTrace();
          }
          return bmp;
          // TODO Auto-generated method stub
      }
  

  Here is the BMPGenerator class:

  public final class BMPGenerator {
  
          /**
           * @param image
           * @return
           * @throws IOException
           * @see {@link #encodeBMP(int[], int, int)}
           */
          public static byte[] encodeBMP(Image image) throws IOException {
                  int width = image.getWidth();
                  int height = image.getHeight();
                  int[] rgb = new int[height * width];
                  image.getRGB(rgb, 0, width, 0, 0, width, height);
                  return encodeBMP(rgb, width, height);
          }
  
          /**
           * A self-contained BMP generator, which takes a byte array (without any unusual
           * offsets) extracted from an {@link Image}. The target platform is J2ME. You may
           * wish to use the convenience method {@link #encodeBMP(Image)} instead of this.
           * 
  
           * A BMP file consists of 4 parts:-
           * 
  
           * 
  header
           * 
  information header
           * 
  optional palette
           * 
  image data
           * 
           * At this time only 24 bit uncompressed BMPs with Windows V3 headers can be created.
           * Future releases may become much more space-efficient, but will most likely be
           * ditched in favour of a PNG generator.
           *
           * @param rgb
           * @param width
           * @param height
           * @return
           * @throws IOException
           * @see http://en.wikipedia.org/wiki/Windows_bitmap
           */
          public static byte[] encodeBMP(int[] rgb, int width, int height)
                          throws IOException {
                  int pad = (4 - (width % 4)) % 4;
                  // the size of the BMP file in bytes
                  int size = 14 + 40 + height * (pad + width * 3);
                  ByteArrayOutputStream bytes = new ByteArrayOutputStream(size);
                  DataOutputStream stream = new DataOutputStream(bytes);
                  // HEADER
                  // the magic number used to identify the BMP file: 0x42 0x4D
                  stream.writeByte(0x42);
                  stream.writeByte(0x4D);
                  stream.writeInt(swapEndian(size));
                  // reserved
                  stream.writeInt(0);
                  // the offset, i.e. starting address of the bitmap data
                  stream.writeInt(swapEndian(14 + 40));
                  // INFORMATION HEADER (Windows V3 header)
                  // the size of this header (40 bytes)
                  stream.writeInt(swapEndian(40));
                  // the bitmap width in pixels (signed integer).
                  stream.writeInt(swapEndian(width));
                  // the bitmap height in pixels (signed integer).
                  stream.writeInt(swapEndian(height));
                  // the number of colour planes being used. Must be set to 1.
                  stream.writeShort(swapEndian((short) 1));
                  // the number of bits per pixel, which is the colour depth of the image.
                  stream.writeShort(swapEndian((short) 24));
                  // the compression method being used.
                  stream.writeInt(0);
                  // image size. The size of the raw bitmap data. 0 is valid for uncompressed.
                  stream.writeInt(0);
                  // the horizontal resolution of the image. (pixel per meter, signed integer)
                  stream.writeInt(0);
                  // the vertical resolution of the image. (pixel per meter, signed integer)
                  stream.writeInt(0);
                  // the number of colours in the colour palette, or 0 to default to 2n.
                  stream.writeInt(0);
                  // the number of important colours used, or 0 when every colour is important;
                  // generally ignored.
                  stream.writeInt(0);
                  // PALETTE
                  // none for 24 bit depth
                  // IMAGE DATA
                  // starting in the bottom left, working right and then up
                  // a series of 3 bytes per pixel in the order B G R.
                  for (int j = height - 1; j >= 0; j--) {
                          for (int i = 0; i < width; i++) {
                                  int val = rgb[i + width * j];
                                  stream.writeByte(val & 0x000000FF);
                                  stream.writeByte((val >>> 8) & 0x000000FF);
                                  stream.writeByte((val >>> 16) & 0x000000FF);
                          }
                          // number of bytes in each row must be padded to multiple of 4
                          for (int i = 0; i < pad; i++) {
                                  stream.writeByte(0);
                          }
                  }
                  byte[] out = bytes.toByteArray();
                  bytes.close();
                  // quick consistency check
                  if (out.length != size)
                          throw new RuntimeException("bad math");
                  return out;
          }
  
          /**
           * Swap the Endian-ness of a 32 bit integer.
           *
           * @param value
           * @return
           */
          private static int swapEndian(int value) {
                  int b1 = value & 0xff;
                  int b2 = (value >> 8) & 0xff;
                  int b3 = (value >> 16) & 0xff;
                  int b4 = (value >> 24) & 0xff;
  
                  return b1 << 24 | b2 << 16 | b3 << 8 | b4 << 0;
          }
  
          /**
           * Swap the Endian-ness of a 16 bit integer.
           *
           * @param value
           * @return
           */
          private static short swapEndian(short value) {
                  int b1 = value & 0xff;
                  int b2 = (value >> 8) & 0xff;
  
                  return (short) (b1 << 8 | b2 << 0);
          }
  

  Where an error in my code? Is there another way to do the same thing?

  Why you want to use a bmp image?
  You can just use png, jpg or whatever of the original image is.
  If there is a situation where you need the bitmap image call http://www.blackberry.com/developers/docs/7.1.0api/net/rim/device/api/system/EncodedImage.html#getBi...

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  ...

  ...

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