Java tutorial
//package com.java2s; /* * Copyright (C) 2012-2016 Soomla Inc. * * 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.text.TextUtils; import java.util.UUID; public class Main { /** Private Members **/ private static final String DB_KEY_SOOMLA_GENERATED_ID = "soomla.generatedid"; private static String generateKeevaId(Context context) { SharedPreferences sharedPrefs = context.getSharedPreferences("store.kv.db", Context.MODE_PRIVATE); String generatedId = sharedPrefs.getString(DB_KEY_SOOMLA_GENERATED_ID, null); if (TextUtils.isEmpty(generatedId)) { generatedId = UUID.randomUUID().toString(); sharedPrefs.edit().putString(DB_KEY_SOOMLA_GENERATED_ID, generatedId).commit(); } return generatedId; } }