Android Open Source - airprobe Installation

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Back to project page airprobe.

License

The source code is released under:

GNU General Public License

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Java Source Code

/**
 * AirProbe// ww  w. java2s.  c  om
 * Air quality application for Android, developed as part of 
 * EveryAware project (<http://www.everyaware.eu>).
 *
 * Copyright (C) 2014 CSP Innovazione nelle ICT. All rights reserved.
 * 
 * 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/>.
 * 
 * For any inquiry please write to <devel@csp.it>
 * 
 * CONTRIBUTORS
 * 
 * This program was made with the contribution of:
 *   Fabio Saracino <fabio.saracino@csp.it>
 *   Patrick Facco <patrick.facco@csp.it>
 * 
 * 
 * SOURCE CODE
 * 
 *  The source code of this program is available at
 *  <https://github.com/CSPICT/airprobe>
 */

package org.csp.everyaware;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.RandomAccessFile;
import java.util.UUID;

import android.content.Context;

public class Installation 
{
    private static String sID = null;
    private static final String INSTALLATION = "INSTALLATION";

    public synchronized static String id(Context context) 
    {
        if (sID == null) 
        {  
            File installation = new File(context.getFilesDir(), INSTALLATION);
            try 
            {
                if (!installation.exists())
                    writeInstallationFile(installation);
                sID = readInstallationFile(installation);
            } 
            catch (Exception e) 
            {
                throw new RuntimeException(e);
            }
        }
        return sID;
    }

    private static String readInstallationFile(File installation) throws IOException 
    {
        RandomAccessFile f = new RandomAccessFile(installation, "r");
        byte[] bytes = new byte[(int) f.length()];
        f.readFully(bytes);
        f.close();
        return new String(bytes);
    }

    private static void writeInstallationFile(File installation) throws IOException 
    {
        FileOutputStream out = new FileOutputStream(installation);
        String id = UUID.randomUUID().toString();
        out.write(id.getBytes());
        out.close();
    }
}

Java Source Code List