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;
//License from project: MIT License 

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();
        // You cannot create an array using a long type.
        // It needs to be an int type.
        // Before converting to an int type, check
        // to ensure that file is not larger than Integer.MAX_VALUE.
        if (length > Integer.MAX_VALUE) {
            // File is too large
        }/*w  w  w .j av  a 2s .c om*/
        // 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. readFileBytes(File fx)
2. readFileToByteArray(File file)
3. readFileToByteArray(String filePath)
4. fileToBytes(String filePath)
5. fileToByte(String filePath)
6. readBytes(File file)
7. readBytes(String path)
8. readFromFile(String fileName, int offset, int len)
9. read(File file)