How to compress files into zip folder in android? [duplicate]

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Mainfest.xml file

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

Permission requested for write external storage(Updated by 2018/10/04)

 public static void verifyStoragePermissions(Activity activity) {    // Check if we have write permission    int permission = ActivityCompat.checkSelfPermission(activity, Manifest.permission.WRITE_EXTERNAL_STORAGE);    if (permission != PackageManager.PERMISSION_GRANTED) {        // We don't have permission so prompt the user        ActivityCompat.requestPermissions(                activity,                PERMISSIONS_STORAGE,                REQUEST_EXTERNAL_STORAGE        );    }}

Zip Function

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();        }    }

Use the Zip Function

String[] s = new String[2];// Type the path of the files in heres[0] = inputPath + "/image.jpg";s[1] = inputPath + "/textfile.txt"; // /sdcard/ZipDemo/textfile.txt// first parameter is d files second parameter is zip file nameZipManager zipManager = new ZipManager();// calling the zip functionzipManager.zip(s, inputPath + inputFile);

Unzip Function

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);        }}

Use the unzip function

ZipManager zipManager = new ZipManager();zipManager.unzip(inputPath + inputFile, outputPath);

[Source: http://stacktips.com/tutorials/android/how-to-programmatically-zip-and-unzip-file-in-android]