https://github.com/TheDimasig/ImageViewZoom 의 full screen 버전: 최소 축소해도 화면을 꽉 채우도록

FullScreenImageViewTouch.java

public class FullScreenImageViewTouch extends  ImageViewTouch {
	public FullScreenImageViewTouch(Context context, AttributeSet attrs) {
		super(context, attrs);
	}

	@Override
	public void setImageDrawable(Drawable drawable) {
		Point p = getScreenSize(getContext());
		int bitmapWidth = drawable.getIntrinsicWidth();
		int bitmapHeight = drawable.getIntrinsicHeight();

		float minZoom = -1F;

		if( bitmapWidth * p.y >  bitmapHeight * p.x) {
			minZoom = p.x / bitmapWidth;
		} else {
			minZoom = p.y / bitmapHeight;
		}

		if( minZoom < 0.9F) {
			minZoom = 0.9F;
		}

		setMinZoom(minZoom);
		setImageDrawable(drawable, true, null, minZoom * 3);
		zoomTo(minZoom, 3f);

	}

	private static Point screenSize = null;

	private static synchronized Point getScreenSize(Context ctx) {
		if (screenSize == null) {
			Display display = ((WindowManager) ctx.getSystemService(Context.WINDOW_SERVICE)).getDefaultDisplay();
			Point point = new Point();
			if (getApiVersion() >= 13) {
				display.getSize(point);
			} else {
				point.y = display.getHeight();
				point.x = display.getWidth();
			}
			screenSize = point;
		}

		return screenSize;
	}

	private static int getApiVersion() {
		return Build.VERSION.SDK_INT;
	}
}