Android Image Getter for Larger Images

Question

I have used all the Standard Network related code for Getting Images of about 45KB to 75KB but all are failing these methods work fine for Files of about 3-5KB size of Images. How can I achieve Downloading Image of 45 - 75KB for displaying them on an ImageView in Android for my Network Operations the Things I have used are

final URL url = new URL(urlString);

final URLConnection conn = url.openConnection();
HttpURLConnection httpConn = (HttpURLConnection) conn;

httpConn.setAllowUserInteraction(true);

httpConn.setInstanceFollowRedirects(true);

httpConn.setRequestMethod("GET");

httpConn.connect();

and the Second option that I have had used is::

DefaultHttpClient httpClient = new DefaultHttpClient();

HttpGet getRequest = new HttpGet(urlString);

HttpResponse response = httpClient.execute(getRequest);

why is this code functional for Smaller Sized Images and not for Larger Size Images. ?

Answer 1

It would be nice to see what kind of code you use for decoding the response into a bitmap. Anyway, try using a BufferedInputStream like this:

public Bitmap getRemoteImage(final URL aURL) { 
  try { 
    final URLConnection conn = aURL.openConnection(); 
    conn.connect(); 
    final BufferedInputStream bis = new BufferedInputStream(conn.getInputStream()); 
    final Bitmap bm = BitmapFactory.decodeStream(bis); 
    return bm; 
  } catch (IOException e) { 
    Log.d("DEBUGTAG", "Oh noooz an error..."); 
  } 
  return null; 
}

And yes, please start working on your accept-rate

Answer 2

The size of the image you are downloading is pretty irrelevant. The size it decodes with BitmapFactory.decodeStream, however is the memory you are gone need to handle the image. Therefore a reSampling might be useful.

    Options options = new BitmapFactory.Options();
    options.inJustDecodeBounds = true;

    BitmapFactory.decodeStream(is, null, options);

    Boolean scaleByHeight = Math.abs(options.outHeight - TARGET_HEIGHT) >= Math.abs(options.outWidth - TARGET_WIDTH);

    if(options.outHeight * options.outWidth >= 200*200){
    // Load, scaling to smallest power of 2 if dimensions >= desired dimensions
    double sampleSize = scaleByHeight
            ? options.outHeight / TARGET_HEIGHT
            : options.outWidth / TARGET_WIDTH;
    options.inSampleSize = 
          (int)Math.pow(2d, Math.floor(
          Math.log(sampleSize)/Math.log(2d)));
    }

    // Do the actual decoding
    options.inJustDecodeBounds = false;

    is.close();
    is = getHTTPConnectionInputStream(sUrl);
    Bitmap img = BitmapFactory.decodeStream(is, null, options);
    is.close();