@Override
        public void completed(final Bitmap result) {
            if (!isValid()) {
                return;
            }
            mMainHandler.post(new Runnable() {
                public void run() {
                    if (!isValid()) {
                        return;
                    }
                    setImageOnQuad(result);
                    downloadSourceImage(mDownloader);
                    mPlaceholderListener = null;
                }
            });
        }
This is the ImageDownloadListener for the placeholder image
android/viro_bridge/src/main/java/com/viromedia/bridge/component/node/control/VRTImage.java