Android big image zooming pan needs to be done.

I need an Android app code piece in which there will be a big image and the view point will be changed. Just like in google earth how we write and address and go there, using the code we should be able to zoom to different points in an image. Here is an example: [login to view URL] in this example what happens when we press FocusTo button. Focus To (Location 1) FocusTo (Location 2) FocusTo (Location 3) I need the zooming effect to be slow and smooth. Also this should be done with java and a clean and good coding in terms of memory management. The image may be sliced into smaller pieces and only the required proportions will be used and others can be released because the image will be too big to load in mobile device at once in full detail.