Returns a formatted string representation of the number of bytes specified. - Android java.io

Android examples for java.io:File Size

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Description

Returns a formatted string representation of the number of bytes specified.

Demo Code

/*/*from   w  ww  . j  a v  a  2  s . c o m*/
 *  AndroidUtils.java
 *  ARToolKit5
 *
 *  This file is part of ARToolKit.
 *
 *  ARToolKit is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU Lesser General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  ARToolKit 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 Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with ARToolKit.  If not, see <http://www.gnu.org/licenses/>.
 *
 *  As a special exception, the copyright holders of this library give you
 *  permission to link this library with independent modules to produce an
 *  executable, regardless of the license terms of these independent modules, and to
 *  copy and distribute the resulting executable under terms of your choice,
 *  provided that you also meet, for each linked independent module, the terms and
 *  conditions of the license of that module. An independent module is a module
 *  which is neither derived from nor based on this library. If you modify this
 *  library, you may extend this exception to your version of the library, but you
 *  are not obligated to do so. If you do not wish to do so, delete this exception
 *  statement from your version.
 *
 *  Copyright 2015 Daqri, LLC.
 *  Copyright 2011-2015 ARToolworks, Inc.
 *
 *  Author(s): Julian Looser, Philip Lamb
 *
 */
//package com.java2s;

import java.text.DecimalFormat;

public class Main {
    /**
     * Returns a formatted string representation of the number of bytes specified. The largest
     * suitable suffix up until GB will be used, with the returned value expressed to two 
     * decimal places.
     * @param bytes The number of bytes to be reported.
     * @return The specified number of bytes, formatted as a string, in bytes, KB, MB or GB.
     */
    static public String formatBytes(long bytes) {

        double val = 0;
        String units = "";

        if (bytes < 1024) {
            val = bytes;
            units = "bytes";
        } else if (bytes < 1048576) {
            val = (bytes / 1024.0f);
            units = "KB";
        } else if (bytes < 1073741824) {
            val = (bytes / 1048576.0f);
            units = "MB";
        } else {
            val = (bytes / 1073741824.0f);
            units = "GB";
        }

        DecimalFormat df = new DecimalFormat("###.##");
        return df.format(val) + " " + units;

    }
}

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