Adding achievements and leaderboard with an int

Hello,

I've made a couple of Android games and I really want to start adding Android Game Services to my project. Everytime I have an issue with it however. I understand how to use the plugin and grab all the data from the dev console. What I need assistance with is adding it in code wise. I read the tutorial but I just really need to know how I can take for instance int score and apply it to a leaderboard. And then an achievement if a certain int score is hit. If there is a good article on this feel free to link me. I will post back if I find more info