Android Directory Copy copyDirectory(File from, File to, byte[] buffer)

Description

copy Directory

License

Open Source License

Declaration

public static boolean copyDirectory(File from, File to, byte[] buffer) 

Method Source Code

//package com.java2s;
//License from project: Open Source License 

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

public class Main {
    private static final int BUFFER_SIZE = 4096 * 4;

    /**/*w  w w . j  a v  a 2 s . c  om*/
     * Copy a directory and all of its contents.
     * 
     * @param from source file
     * @param to target file
     * @return success or failure
     */
    public static boolean copyDirectory(File from, File to) {
        return copyDirectory(from, to, (byte[]) null);
    }

    public static boolean copyDirectory(String from, String to) {
        return copyDirectory(new File(from), new File(to));
    }

    public static boolean copyDirectory(File from, File to, byte[] buffer) {
        if (from == null)
            return false;
        if (!from.exists())
            return true;
        if (!from.isDirectory())
            return false;
        if (to.exists())
            return false;
        if (!to.mkdirs())
            return false;

        String[] list = from.list();
        // Some JVMs return null for File.list() when the directory is empty.
        if (list != null) {
            if (buffer == null)
                buffer = new byte[BUFFER_SIZE]; // return this buffer to copy files

            for (int i = 0; i < list.length; i++) {
                String fileName = list[i];

                File entry = new File(from, fileName);

                if (entry.isDirectory()) {
                    if (!copyDirectory(entry, new File(to, fileName),
                            buffer)) {
                        return false;
                    }
                } else {
                    if (!copyFile(entry, new File(to, fileName), buffer)) {
                        return false;
                    }
                }
            }
        }

        return true;
    }

    public static boolean copyFile(File from, File to, byte[] buf) {
        if (buf == null)
            buf = new byte[BUFFER_SIZE];

        FileInputStream from_s = null;
        FileOutputStream to_s = null;

        try {
            from_s = new FileInputStream(from);
            to_s = new FileOutputStream(to);

            for (int bytesRead = from_s.read(buf); bytesRead > 0; bytesRead = from_s
                    .read(buf)) {
                to_s.write(buf, 0, bytesRead);
            }

            to_s.getFD().sync();

        } catch (IOException ioe) {
            return false;
        } finally {
            if (from_s != null) {
                try {
                    from_s.close();
                    from_s = null;
                } catch (IOException ioe) {

                }
            }
            if (to_s != null) {
                try {
                    to_s.close();
                    to_s = null;
                } catch (IOException ioe) {
                }
            }
        }

        return true;
    }
}

Related

1. CopyDir(String sourcedir, String destdir)
2. copyDir(File source, File destination)
3. copyDirectory(@NotNull String srcDir, @NotNull String dstDir, @NotNull final List excludes)
4. copyDirectory(File from, File to)
5. copyDirectory(File source, File destination)
6. copyDirectory(String from, String to)
7. copyDirectory(String sourceDirName, String destinationDirName)
8. copyDirectory(File sourceDir, File targetDir)