How to Programmatically Zip and Unzip File in Android

How to Zip files.

1) Persmissions in Manifest File.

Crete a sample android activity and add the following permission to application Mainfest.xml file. These persmissions are required to store data to your device storage.

<uses-permission android:name="android.permission.WRITE_INTERNAL_STORAGE" />

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

 

2) In Java File

 

 

public void zip(String[] _files, String zipFileName) {

        try {

            BufferedInputStream origin = null;

            FileOutputStream dest = new FileOutputStream(zipFileName);

            ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(

                    dest));

            byte data[] = new byte[BUFFER];

 

            for (int i = 0; i < _files.length; i++) {

                Log.v("Compress", "Adding: " + _files[i]);

                FileInputStream fi = new FileInputStream(_files[i]);

                origin = new BufferedInputStream(fi, BUFFER);

 

                ZipEntry entry = new ZipEntry(_files[i].substring(_files[i].lastIndexOf("/") + 1));

                out.putNextEntry(entry);

                int count;

 

                while ((count = origin.read(data, 0, BUFFER)) != -1) {

                    out.write(data, 0, count);

                }

                origin.close();

            }

 

            out.close();

        } catch (Exception e) {

            e.printStackTrace();

        }

    }

 

~You can use this in your activity~

 

// declare an array for storing the files i.e the path

// of your source files

String[] s = new String[2];

 

// Type the path of the files in here

s[0] = inputPath + "/image.jpg";

s[1] = inputPath + "/textfile.txt"; // /sdcard/ZipDemo/textfile.txt

 

// first parameter is d files second parameter is zip file name

ZipManager zipManager = new ZipManager();

 

// calling the zip function

zipManager.zip(s, inputPath + inputFile);

 

 

 

How to UnZip files.

1) Persmissions in Manifest File.

Crete a sample android activity and add the following permission to application Mainfest.xml file. These persmissions are required to store data to your device storage.

<uses-permission android:name="android.permission.WRITE_INTERNAL_STORAGE" />

<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>

 

2) In Java File

 

public void unzip(String _zipFile, String _targetLocation) {

 

        //create target location folder if not exist

        dirChecker(_targetLocatioan);

 

        try {

            FileInputStream fin = new FileInputStream(_zipFile);

            ZipInputStream zin = new ZipInputStream(fin);

            ZipEntry ze = null;

            while ((ze = zin.getNextEntry()) != null) {

 

                //create dir if required while unzipping

                if (ze.isDirectory()) {

                    dirChecker(ze.getName());

                } else {

                    FileOutputStream fout = new FileOutputStream(_targetLocation + ze.getName());

                    for (int c = zin.read(); c != -1; c = zin.read()) {

                        fout.write(c);

                    }

 

                    zin.closeEntry();

                    fout.close();

                }

 

            }

            zin.close();

        } catch (Exception e) {

            System.out.println(e);

        }

}

 

 

~You can use this Method in your activity~

 

ZipManager zipManager = new ZipManager();

zipManager.unzip(inputPath + inputFile, outputPath);