Android File to Byte Array Read getBytesFromFile(File file, long startPostion, long numberOfBytesToRead)

Description

get Bytes From File

Declaration

public static byte[] getBytesFromFile(File file, long startPostion,
            long numberOfBytesToRead) throws IOException 

Method Source Code

//package com.java2s;
import java.io.ByteArrayOutputStream;

import java.io.File;
import java.io.FileInputStream;

import java.io.IOException;

public class Main {
    /** The BUFFER_SIZE of 128 kb. */
    private final static int BUFFER_SIZE = 1024 * 128;

    public static byte[] getBytesFromFile(File file, long startPostion,
            long numberOfBytesToRead) throws IOException {
        try (FileInputStream fis = new FileInputStream(file);
                ByteArrayOutputStream ous = new ByteArrayOutputStream()) {
            fis.skip(startPostion);/*from w w  w  .ja  v a 2 s .  com*/

            byte[] dataBytes = new byte[BUFFER_SIZE];

            long totalRead = 0;
            int nread = 0;
            while ((nread = fis.read(dataBytes)) != -1
                    && (totalRead <= numberOfBytesToRead || numberOfBytesToRead == -1)) {
                ous.write(dataBytes, 0, nread);
                totalRead += nread;
            }

            return ous.toByteArray();
        }
    }
}

Related

1. getBytes(File file)
2. getBytes(File file)
3. getBytesFromFile(File file)
4. getFileAsByteArray(File file)
5. getFileAsByteArrayOutputStream( File file)
6. readBytes(@NotNull File file)
7. readBytes(@NotNull String filePath)