Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Copyright (C) Stichting Akvo (Akvo Foundation)
 *
 * This file is part of Akvo Caddisfly.
 *
 * Akvo Caddisfly 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.
 *
 * Akvo Caddisfly 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 Akvo Caddisfly. If not, see <http://www.gnu.org/licenses/>.
 */

import android.content.Context;

import android.content.SharedPreferences;

import android.support.annotation.NonNull;
import android.support.annotation.Nullable;

import java.util.UUID;

public class Main {
    private static final String PREF_UNIQUE_ID = "PREF_UNIQUE_ID";
    @Nullable
    private static String uniqueID = null;

    /**
     * Gets an unique id for installation
     *
     * @return the unique id
     */
    @Nullable
    public static synchronized String getInstallationId(@NonNull Context context) {
        if (uniqueID == null) {
            SharedPreferences sharedPrefs = context.getSharedPreferences(PREF_UNIQUE_ID, Context.MODE_PRIVATE);
            uniqueID = sharedPrefs.getString(PREF_UNIQUE_ID, null);

            if (uniqueID == null) {
                uniqueID = UUID.randomUUID().toString();
                SharedPreferences.Editor editor = sharedPrefs.edit();
                editor.putString(PREF_UNIQUE_ID, uniqueID);
                editor.apply();
            }
        }

        return uniqueID;
    }
}