copy large stream - Android File Input Output

Android examples for File Input Output:Copy File

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Description

copy large stream

Demo Code


//package com.java2s;

import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

public class Main {
    private static final int EOF = -1;
    private static final int DEFAULT_BUFFER_SIZE = 1024 * 4;

    public static int copy(InputStream input, OutputStream output)
            throws IOException {
        long count = copyLarge(input, output);
        if (count > Integer.MAX_VALUE) {
            return -1;
        }//from  w  w  w .  ja  va  2  s . c o  m
        return (int) count;
    }

    private static long copyLarge(InputStream input, OutputStream output)
            throws IOException {
        long count = 0;
        int n = 0;
        byte[] buffer = new byte[DEFAULT_BUFFER_SIZE];
        while (EOF != (n = input.read(buffer))) {
            output.write(buffer, 0, n);
            count += n;
        }
        return count;
    }
}

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