Android examples for Android OS:SharedPreferences
Check if SharedPreferences has a key
//package com.java2s; import android.content.Context; import android.content.SharedPreferences; import android.preference.PreferenceManager; public class Main { private static final String REDU_PIN_CODE = "REDU_PIN_CODE"; public static boolean has(Context context) { return getPrefs(context).contains(REDU_PIN_CODE); }/*www . j a v a 2s. co m*/ private static SharedPreferences getPrefs(Context context) { return PreferenceManager.getDefaultSharedPreferences(context); } }