Use DownloadImageTask in UI.

TripMembersSection.java

userImageView.setScaleType(ImageView.ScaleType.CENTER_CROP);
DownloadImageTask downloadImageTask = new DownloadImageTask();
downloadImageTask.setOnBitmapDownloadListener(new DownloadImageTask.OnBitmapDownloadListener() {
  @Override
  public void result(Bitmap bitmap) {
    if (bitmap != null) {
      userImageView.setImageBitmap(BitmapLoader.resizeImageForImageView(bitmap,
        Math.max(userImageView.getMeasuredWidth(), userImageView.getMeasuredHeight())));
    }
  }
});
downloadImageTask.execute(member.getPhoto());