utility class for saving and retrieving int array to/from shared preferences

Utils.java

import android.content.Context;
import android.content.SharedPreferences;
import android.preference.PreferenceManager;

public class Utils {

    private static final String PREFS_KEY = "numbers";

    static int[] getNumbersFromSharedPreference(Context context) {
        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
        String p = sharedPreferences.getString(PREFS_KEY, "88,21,6,17,65,59,11,90");
        String[] spl = p.split(",");
        int[] numbers = new int[spl.length];
        for (int i = 0; i < spl.length; i++) numbers[i] = Integer.parseInt(spl[i]);
        return numbers;
    }

    static void saveNumbersToSharedPreferences(Context context, int[] numbers) {
        SharedPreferences sharedPreferences = PreferenceManager.getDefaultSharedPreferences(context);
        SharedPreferences.Editor editor = sharedPreferences.edit();
        String strArr = "";
        for (int i : numbers) strArr += String.valueOf(i).concat(",");
        editor.putString(PREFS_KEY, strArr).apply();
    }
}