RelativeLayout不显示所有按钮

I am not able to fit all my buttons on the screen? The last row and a half of buttons are off of screen? the final layout looks a bit different I've made custom buttons and there are secondary functions to most buttons but I've simplified the code to eliminate all possible mistakes not relating directly to my problem. I'd like the buttons to both fill and stay on the screen (I'd post a picture of my layout but my reputation is too low)I am not able to fit all my buttons on the scre