getAttachedImageView.java

/**
 * 比较之前传入的ImageView在当前时刻关联的`AsyncTask`是否等于自身
 * 来确定是否需要将结果返回给ImageView
 */
private ImageView getAttachedImageView() {
    final ImageView imageView = imageViewReference.get();
    final BitmapWorkerTask bitmapWorkerTask = getBitmapWorkerTask(imageView);

    if (this == bitmapWorkerTask) {
        return imageView;
    }

    return null;
}