get Bytes From File - Android java.lang

Android examples for java.lang:Byte

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Description

get Bytes From File

Demo Code


//package com.java2s;

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
        }//  w ww.  j  a  v a 2 s .  c  o  m
        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;
    }
}

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