[android-developers] Re: Download image from server

[Romain Guy]

I encountered a similar error when trying to decode a buffered input
stream from a web server using BitmapFactory. We identified this as a
bug that will be fixed in the next version. Here is a workaround you
can use:

            Bitmap bitmap = null;
            InputStream in = null;
            OutputStream out = null;

            try {
                in = new BufferedInputStream(new
URL("http://blah.com/foo/bar.jpg";).openStream(),
                        IO_BUFFER_SIZE);

                final ByteArrayOutputStream dataStream = new
ByteArrayOutputStream();
                out = new BufferedOutputStream(dataStream, 4 * 1024);
                copy(in, out);
                out.flush();

                final byte[] data = dataStream.toByteArray();
                bitmap = BitmapFactory.decodeByteArray(data, 0, data.length);
            } catch (IOException e) {
                android.util.Log.e("IO", "Could not load buddy icon: "
+ this, e);
            } finally {
                closeStream(in);
                closeStream(out);
            }

And to make it work you will need the following two methods:

    /**
     * Copy the content of the input stream into the output stream,
using a temporary
     * byte array buffer whose size is defined by [EMAIL PROTECTED] 
#IO_BUFFER_SIZE}.
     *
     * @param in The input stream to copy from.
     * @param out The output stream to copy to.
     *
     * @throws IOException If any error occurs during the copy.
     */
    private static void copy(InputStream in, OutputStream out) throws
IOException {
        byte[] b = new byte[4 * 1024];
        int read;
        while ((read = in.read(b)) != -1) {
            out.write(b, 0, read);
        }
    }

    /**
     * Closes the specified stream.
     *
     * @param stream The stream to close.
     */
    private static void closeStream(Closeable stream) {
        if (stream != null) {
            try {
                stream.close();
            } catch (IOException e) {
                android.util.Log.e("IO", "Could not close stream", e);
            }
        }
    }


On Thu, Oct 2, 2008 at 8:26 AM, Nemat <[EMAIL PROTECTED]> wrote:
>
> I have applied the way given in link.I think the problem is in
> displaying the image??
> Do u know the reason behind this JPEG error???
>
> On Oct 1, 7:07 pm, Mark Hansen <[EMAIL PROTECTED]> wrote:
>> I followed this short tutorial a while back for downloading an image
>> via http, maybe it can point you in the right direction...
>>
>> http://www.anddev.org/gallery_with_remote_images-t769.html
>>
>> On Oct 1, 6:51 am, Nemat <[EMAIL PROTECTED]> wrote:
>>
>> > Hi,
>>
>> > I have to download an image from server.But I got an error "D/skia
>> > ( 197): xxxxxxxxxxx jpeg error 53 Not a JPEG file: starts with 0x%02x
>> > 0x%02x"
>>
>> > I have to perform two continues Http connection.First is used to get
>> > server response and second to get image from the server.First task is
>> > performed correctly but while downloading image I got the given
>> > eror.So the problem in getting image from server.
>>
>> > My code is:
>> > Code:
>>
>> > public ImageView getView(String myImageURL) {
>> >        Log.i("TAG","downloadFile000000000000000000"+myImageURL);
>> >         ImageView i = new ImageView(this);
>>
>> >         try {
>> >                 /* Open a new URL and get the InputStream to load data
>> > from it. */
>> >                 URL aURL = new URL(myImageURL);
>> >                 URLConnection conn = aURL.openConnection();
>>
>> > Log.i("TAG","downloadFile1111111111111111111"+myImageURL);
>> >                 conn.connect();
>> >                 InputStream is = conn.getInputStream();
>>
>> > Log.i("TAG","downloadFile2222222222222222222222"+is.read());
>> >                 /* Buffered is always good for a performance plus. */
>> >                 BufferedInputStream bis = new BufferedInputStream(is);
>>
>> > Log.i("TAG","downloadFile33333333333333333333="+bis.read());
>> >                 /* Decode url-data to a bitmap. */
>> >                // Bitmap bm = BitmapFactory.decodeStream(bis);
>> >                 Bitmap bm = BitmapFactory.decodeStream(is);
>> >                //
>> > Log.i("TAG","downloadFile4444444444444444444"+bm.getHeight());
>> >                // bis.close();
>> >                 is.close();
>> >                 /* Apply the Bitmap to the ImageView that will be
>> > returned. */
>> >                 i.setImageBitmap(bm);
>> >                 Log.i("TAG","downloadFile555555555555555555555");
>> >            } catch (IOException e) {
>> >               Log.i("TAG","downloadFile666666666666666666666666");
>> >                 Log.e("DEBUGTAG", "Remtoe Image Exception", e);
>> >            }
>>
>> >         /* Image should be scaled as width/height are set. */
>> >        // i.setScaleType(ImageView.ScaleType.FIT_CENTER);
>> >         /* Set the Width/Height of the ImageView. */
>>
>> >         return i;
>> >     }
>>
>> > This code works fine when I performed this task alone in another
>> > project.
> >
>



-- 
Romain Guy
www.curious-creature.org

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