dir To Zip - Android File Input Output

Android examples for File Input Output:Zip File

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  3. File Input Output
  4. Zip File

Description

dir To Zip

Demo Code


//package com.java2s;

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

import java.io.IOException;

import java.util.zip.ZipEntry;

import java.util.zip.ZipOutputStream;

import android.util.Log;

public class Main {
    private static final int FILE_BUFFER_SIZE = 51200;
    private static final String TAG = "FileHelper";

    private static boolean dirToZip(String baseDirPath, File dir,
            ZipOutputStream out) throws IOException {
        if (!dir.isDirectory()) {
            return false;
        }/*w  w  w.  j av  a2 s.  c  o  m*/

        File[] files = dir.listFiles();
        if (files.length == 0) {
            ZipEntry entry = new ZipEntry(getEntryName(baseDirPath, dir));

            try {
                out.putNextEntry(entry);
                out.closeEntry();
            } catch (IOException e) {
                Log.i(TAG, "Exception, ex: " + e.toString());
            }
        }

        for (int i = 0; i < files.length; i++) {
            if (files[i].isFile()) {
                fileToZip(baseDirPath, files[i], out);
            } else {
                dirToZip(baseDirPath, files[i], out);
            }
        }
        return true;
    }

    private static String getEntryName(String baseDirPath, File file) {
        if (!baseDirPath.endsWith(File.separator)) {
            baseDirPath = baseDirPath + File.separator;
        }

        String filePath = file.getAbsolutePath();
        if (file.isDirectory()) {
            filePath = filePath + "/";
        }

        int index = filePath.indexOf(baseDirPath);
        return filePath.substring(index + baseDirPath.length());
    }

    private static boolean fileToZip(String baseDirPath, File file,
            ZipOutputStream out) throws IOException {
        FileInputStream in = null;
        ZipEntry entry = null;

        byte[] buffer = new byte[FILE_BUFFER_SIZE];
        int bytes_read;
        try {
            in = new FileInputStream(file);
            entry = new ZipEntry(getEntryName(baseDirPath, file));
            out.putNextEntry(entry);

            while ((bytes_read = in.read(buffer)) != -1) {
                out.write(buffer, 0, bytes_read);
            }
            out.closeEntry();
            in.close();
        } catch (IOException e) {
            Log.i(TAG, "Exception, ex: " + e.toString());
            return false;
        } finally {
            if (out != null) {
                out.closeEntry();
            }

            if (in != null) {
                in.close();
            }
        }
        return true;
    }
}

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