FrescoDownloadBitmap.java

private static void downloadBitmap(ImageRequest imageRequest, Context context, final IBitmapDownloader iBitmapDownloader) {
  DataSource<CloseableReference<CloseableImage>> dataSourceImage = Fresco.getImagePipeline().fetchDecodedImage(imageRequest, context);
  DataSubscriber<CloseableReference<CloseableImage>> dataSubscriberImage = new BaseDataSubscriber<CloseableReference<CloseableImage>>() {
    @Override
    public void onNewResultImpl(DataSource<CloseableReference<CloseableImage>> dataSource) {
        CloseableReference<CloseableImage> imageReference = dataSource.getResult();
        if (imageReference != null) {
            iBitmapDownloader.onSuccess(imageReference);
        }
        else{
            iBitmapDownloader.onFailure(null);
        }
    }

    @Override
    public void onFailureImpl(DataSource dataSource) {
        iBitmapDownloader.onFailure(dataSource);
    }
  };
  dataSourceImage.subscribe(dataSubscriberImage, CallerThreadExecutor.getInstance());
}