Android动态获取ImageView的实际高度和宽度

    imageView.getViewTreeObserver().addOnPreDrawListener(new   ViewTreeObserver.OnPreDrawListener() {
        @Override
        public boolean onPreDraw() {
            imageView.getViewTreeObserver().removeOnPreDrawListener(this);

            int height = imageView.getHeight();
            int width = imageView.getWidth();

            return false;
        }
    });