@Override
    public void setBackground(Drawable background) {
        setBackgroundDrawable(background);
    }
Controls how the image should be resized or moved to match the size
of this ImageView.

@param scaleType The desired scaling mode.
@attr ref android.R.styleable#ImageView_scaleType
sample/src/main/java/com/etiennelawlor/quickreturn/views/RoundedImageView.java