Android File to Byte Array Read getBytesFromFile(File file)

Description

get Bytes From File

License

Open Source License

Declaration

public static byte[] getBytesFromFile(File file) throws IOException 

Method Source Code

//package com.java2s;
/*/*from   ww w.  j a  v  a 2  s . co m*/
 *  Nokia Data Gathering
 *
 *  Copyright (C) 2011 Nokia Corporation
 *
 *  This program 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 2.1 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
 *  Lesser General Public License for more details.
 *
 *  You should have received a copy of the GNU Lesser General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/
 */

import java.io.File;
import java.io.FileInputStream;
import java.io.IOException;
import java.io.InputStream;

public class Main {
    public static byte[] getBytesFromFile(File file) throws IOException {
        InputStream is = new FileInputStream(file);

        // Get the size of the file
        long length = file.length();

        if (length > Integer.MAX_VALUE) {
            // File is too large
            throw new IOException("File " + file.getName()
                    + " is too large to process");
        }

        // Create the byte array to hold the data
        byte[] bytes = new byte[(int) length];

        // Read in the bytes
        int offset = 0;
        int numRead = 0;
        while (offset < bytes.length
                && (numRead = is.read(bytes, offset, bytes.length - offset)) >= 0) {
            offset += numRead;
        }

        // Ensure all the bytes have been read in
        if (offset < bytes.length) {
            throw new IOException("Could not completely read file "
                    + file.getName());
        }

        // Close the input stream and return bytes
        is.close();
        return bytes;
    }
}

Related

1. getBytes(File file)
2. getBytes(File file)
3. getBytesFromFile(File file, long startPostion, long numberOfBytesToRead)
4. getFileAsByteArray(File file)
5. getFileAsByteArrayOutputStream( File file)
6. readBytes(@NotNull File file)