Java tutorial
//package com.java2s; /* * Copyright 2015 Schedo Inc. All rights reserved. * * Licensed under the Apache License, Version 2.0 (the "License"); * you may not use this file except in compliance with the License. * You may obtain a copy of the License at * * http://www.apache.org/licenses/LICENSE-2.0 * * Unless required by applicable law or agreed to in writing, software * distributed under the License is distributed on an "AS IS" BASIS, * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. * See the License for the specific language governing permissions and * limitations under the License. */ import android.content.Context; import android.content.SharedPreferences; import android.preference.PreferenceManager; public class Main { private static final String PREF_SESSION_ID = "pref-session-id"; /** * Saves the sessionId. */ public static void saveSessionId(Context context, String sessionId) { SharedPreferences pref = PreferenceManager.getDefaultSharedPreferences(context); if (null == sessionId) { // we want to remove pref.edit().remove(PREF_SESSION_ID).apply(); } else { pref.edit().putString(PREF_SESSION_ID, sessionId).apply(); } } }