Java tutorial
//package com.java2s; import android.content.Context; import android.content.SharedPreferences; import android.preference.PreferenceManager; public class Main { private static SharedPreferences sharedPreferences = null; private static SharedPreferences.Editor editor = null; /** * Initialize the SharedPreferences instance for the app. * This method must be called before using any other methods of this class. */ public static void init(Context mcontext) { if (sharedPreferences == null) { sharedPreferences = PreferenceManager.getDefaultSharedPreferences(mcontext); editor = sharedPreferences.edit(); } } }