Java tutorial
//package com.java2s; //License from project: Apache License import android.content.Context; import android.content.SharedPreferences; import java.util.HashSet; import java.util.Set; public class Main { public static final String DEFAULT_FILE_NAME = "playTogetherAttr"; public static Set<String> getStringSetProperty(Context context, String key) { SharedPreferences sp = context.getSharedPreferences(DEFAULT_FILE_NAME, Context.MODE_PRIVATE); return sp.getStringSet(key, null); } public static Set<String> getStringSetProperty(Context context, String key, String fileName) { SharedPreferences sp = context.getSharedPreferences(fileName, Context.MODE_PRIVATE); return sp.getStringSet(key, new HashSet<String>()); } }