Android : gridview and 52 buttons want compress button capacity

I have got one simple problem, my app contains 52 buttons but i cant display all buttons. I need suggest have can i solve this trouble the best as I can. At the moment i have buttons like that: http://prntscr.com/482kjw but this solve is untransparent and i want one button make two functionaly one on click and second on long clik or something that, but i havent got idea how.. and now my question is: I need recommendations for the solution of my problem or some tutorial how to display two images on one button, Gridview.