There are various XML attributes for ImageView to scale its content , and various layout views that allow to place views and set their sizes.
Howeve
Fist of all, I don't really understand what you really want for align image to the bottom from what I read your layout. My layout will make the image center, and scale you can modify the high of the bottom view to see how image will look like. Change the high of the top or bottom view the image size will scale up or down depend on the space available for imageView.
Hope this will fix your problem.