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
I used android:scaleType="fitXY" but it got me trying it so many times until the image did get fit the XY of the whole screen,,, what I mean there is a wierd bug in scaleType and fitEnd will work fine but you'll need to delete it and write again until it fit the end of any screen without corpping. Bottom line scaleType has bugs and bugs you until it gives you what you need.