java - Saving an int variable "highscore" with sharedpreferences

I am developing a game and I have written all the code, including the code that makes sure the highscore int is updated. Now I am wondering how I could save this int with SharedPreferences. I am an beginning programmer, so could you give me all the steps I would have to do?

The variable highscore is in the MainView and I came to the understanding that you would have to save something with shared preferences in the MainActivity.