BitmapFactory.decodeStream(InputStream is) returns null for non null InputStream on Android

Question

I\'m developing an Android application, and it\'s view is containing multiple Gallerys. The content of the Gallerys (the Bitmaps) are red from the Internet.

For the

Answer 1

public static Bitmap decodeStream (InputStream is)

Returns

The decoded bitmap, or null if the image data could not be decoded.

Did you check that you're not getting some 404 error or similar instead of the image?

Answer 2

Google brought me here. For everyone having the same problem:

Problem: http://code.google.com/p/android/issues/detail?id=6066

Solution ("FlushedInputStream"): http://android-developers.blogspot.com/2010/07/multithreading-for-performance.html

Answer 3

I've run into this. Try using BufferedHttpEntity with your inputstream. I found this prevented 99.9% of the issues with getting silent nulls from decodeStream.

Maybe not signficant, but I reliably use org.apache.http.client.HttpClient rather than HttpURLConnection as in:

public static Bitmap decodeFromUrl(HttpClient client, URL url, Config bitmapCOnfig)
{
    HttpResponse response=null;
    Bitmap b=null;
    InputStream instream=null;

    BitmapFactory.Options decodeOptions = new BitmapFactory.Options();
    decodeOptions.inPreferredConfig = bitmapCOnfig;
    try
    {
    HttpGet request = new HttpGet(url.toURI());
        response = client.execute(request);
        if (response.getStatusLine().getStatusCode() != 200)
        {
            MyLogger.w("Bad response on " + url.toString());
            MyLogger.w ("http response: " + response.getStatusLine().toString());
            return null;
        }
        BufferedHttpEntity bufHttpEntity = new BufferedHttpEntity(response.getEntity());
        instream = bufHttpEntity.getContent();

        return BitmapFactory.decodeStream(instream, null, decodeOptions);
    }
    catch (Exception ex)
    {
        MyLogger.e("error decoding bitmap from:" + url, ex);
        if (response != null)
        {
            MyLogger.e("http status: " + response.getStatusLine().getStatusCode());
        }
        return null;
    }
    finally
    {
        if (instream != null)
        {
            try {
                instream.close();
            } catch (IOException e) {
                MyLogger.e("error closing stream", e);
            }
        }
    }
}