Java tutorial
//package com.java2s; import android.annotation.SuppressLint; import android.content.Context; import android.content.SharedPreferences; import android.preference.PreferenceManager; public class Main { @SuppressLint("CommitPrefEdits") public static void defaultState(Context context, boolean state) { SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(context); if (!prefs.contains("wifi_state")) prefs.edit().putBoolean("wifi_state", state).commit(); } }