Android Question Most efficient way to get image aspect ratio

I plan to use LoadBitmapResize to load images, unfortunately before doing that you need the aspect ratio to tell it what size to get. The only suggestion I have found here for getting the aspect ratio involves loading the entire file into a bitmap and using that to get the dmensions. As photo files can be quite large (and getting larger all the time) this seems very inefficient. I know in windows if you hover over an image file (.jpg/.png//bmp) it will display the size. Isn't there a way to read the dimensions from the file rather than loading the whole thing?

Thanks