Zoom-In replace small image with large image

Thank you for you beautiful library.

I just have one problem. I have an ImageView with a small image in it. I want to replace this small image with a large (high-resolution-image) one. This works, but i have to reset (reposition) the large image - e.g. user zoom in the small image and if the "replace" is done i want that the user see exactly the same detail as before. My Code is:

`mAttacher.setOnScaleChangeListener(new PhotoViewAttacher.OnScaleChangeListener() {
@Override
public void onScaleChange(float scaleFactor, float focusX, float focusY) {
// NEW IMAGE IS REPLACES
mAttacher.update();
mAttacher.setDisplayMatrix(matrix);
}
});`

This code below is not working! Do i have to "recalculate" the excactly position and scale?

Thank you and sorry for my english...