ViewTreeObserver vto = zoomImageView.getViewTreeObserver();

        vto.addOnPreDrawListener(new ViewTreeObserver.OnPreDrawListener() {

            @Override

            public boolean onPreDraw() {

                if (hasMeasured == false)

                {

                    int height = zoomImageView.getMeasuredHeight();

                    int width = zoomImageView.getMeasuredWidth();

                    Log.i("height",height+"");

                    Log.i("width",width+"");

                    hasMeasured = true;

                }

                return true;

            }

        });