为什么我在RelativeLayout中的ImageView顶部和底部都有空格?

I am using a relativelayout to overlay to images. On all screen sizes so far that I have tested (from 2.7 to 10.1 inch) I always get white space on top of my image. In my IDE I always see that my relativelayout is causing the extra space on top and on the bottom of my image.I am using a relativelayout to overlay to image