Here you can find the source of hasAsymmericMasterSecret(Context context)
public static boolean hasAsymmericMasterSecret(Context context)
//package com.java2s; /** /*from w w w. j a va2 s . co m*/ * Copyright (C) 2011 Whisper Systems * * This program is free software: you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation, either version 3 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. */ import android.content.Context; import android.content.SharedPreferences; public class Main { public static final String PREFERENCES_NAME = "SecureSMS-Preferences"; public static final String ASYMMETRIC_LOCAL_PUBLIC = "asymmetric_master_secret_public"; public static boolean hasAsymmericMasterSecret(Context context) { SharedPreferences settings = context.getSharedPreferences( PREFERENCES_NAME, 0); return settings.contains(ASYMMETRIC_LOCAL_PUBLIC); } }