Decompress.java

////////////////////////////////////////////////////////////////////////////////
// Copyright 2012 Michael Schmalle - Teoti Graphix, LLC
// 
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
// 
// http://www.apache.org/licenses/LICENSE-2.0 
// 
// Unless required by applicable law or agreed to in writing, software 
// distributed under the License is distributed on an "AS IS" BASIS, 
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and 
// limitations under the License
// 
// Author: Michael Schmalle, Principal Architect
// mschmalle at teotigraphix dot com
////////////////////////////////////////////////////////////////////////////////

package com.teotigraphix.caustk.utils;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;

/*

 String zipFile = Environment.getExternalStorageDirectory() + "/files.zip"; 
 String unzipLocation = Environment.getExternalStorageDirectory() + "/unzipped/"; 

 Decompress d = new Decompress(zipFile, unzipLocation); 
 d.unzip(); 

 */

/**
 * @author Michael Schmalle
 * @copyright Teoti Graphix, LLC
 * @since 1.0
 */
public class Decompress {
    private String _zipFile;

    private String _location;

    public Decompress(String zipFile, String location) {
        _zipFile = zipFile;
        _location = location;

        _dirChecker("");
    }

    public void unzip() {
        try {
            FileInputStream fin = new FileInputStream(_zipFile);
            ZipInputStream zin = new ZipInputStream(fin);
            ZipEntry ze = null;
            while ((ze = zin.getNextEntry()) != null) {
                //XXX Log.v("Decompress", "Unzipping " + ze.getName());

                if (ze.isDirectory()) {
                    _dirChecker(ze.getName());
                } else {

                    int size;
                    byte[] buffer = new byte[2048];

                    FileOutputStream bufferOut = new FileOutputStream(new File(_location,
                            ze.getName()));
                    while ((size = zin.read(buffer, 0, buffer.length)) != -1) {
                        bufferOut.write(buffer, 0, size);
                    }

                    zin.closeEntry();
                    bufferOut.flush();
                    bufferOut.close();
                }

            }
            zin.close();
        } catch (Exception e) {
            //XXX Log.e("Decompress", "unzip", e);
        }

    }

    private void _dirChecker(String dir) {
        File f = new File(_location + dir);

        if (!f.isDirectory()) {
            f.mkdirs();
        }
    }
}