/*
 *
 * Zips a file at a location and places the resulting zip file at the toLocation
 * Example: zipFileAtPath("downloads/myfolder", "downloads/myFolder.zip");
 */

public boolean zipFileAtPath(String sourcePath, String toLocation) {
    // ArrayList<String> contentList = new ArrayList<String>();
    final int BUFFER = 2048;


    File sourceFile = new File(sourcePath);
    try {
        BufferedInputStream origin = null;
        FileOutputStream dest = new FileOutputStream(toLocation);
        ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(
                dest));
        if (sourceFile.isDirectory()) {
            zipSubFolder(out, sourceFile, sourceFile.getParent().length());
        } else {
            byte data[] = new byte[BUFFER];
            FileInputStream fi = new FileInputStream(sourcePath);
            origin = new BufferedInputStream(fi, BUFFER);
            ZipEntry entry = new ZipEntry(getLastPathComponent(sourcePath));
            out.putNextEntry(entry);
            int count;
            while ((count = origin.read(data, 0, BUFFER)) != -1) {
                out.write(data, 0, count);
            }
        }
        out.close();
    } catch (Exception e) {
        e.printStackTrace();
        return false;
    }
    return true;
}

/*
 *
 * Zips a subfolder
 *
 */

private void zipSubFolder(ZipOutputStream out, File folder,
        int basePathLength) throws IOException {

    final int BUFFER = 2048;

    File[] fileList = folder.listFiles();
    BufferedInputStream origin = null;
    for (File file : fileList) {
        if (file.isDirectory()) {
            zipSubFolder(out, file, basePathLength);
        } else {
            byte data[] = new byte[BUFFER];
            String unmodifiedFilePath = file.getPath();
            String relativePath = unmodifiedFilePath
                    .substring(basePathLength);
            Log.i("ZIP SUBFOLDER", "Relative Path : " + relativePath);
            FileInputStream fi = new FileInputStream(unmodifiedFilePath);
            origin = new BufferedInputStream(fi, BUFFER);
            ZipEntry entry = new ZipEntry(relativePath);
            out.putNextEntry(entry);
            int count;
            while ((count = origin.read(data, 0, BUFFER)) != -1) {
                out.write(data, 0, count);
            }
            origin.close();
        }
    }
}

/*
 * gets the last path component
 *
 * Example: getLastPathComponent("downloads/example/fileToZip");
 * Result: "fileToZip"
 */
public String getLastPathComponent(String filePath) {
    String[] segments = filePath.split("/");
    String lastPathComponent = segments[segments.length - 1];
    return lastPathComponent;
}

private static void zipFolder(String inputFolderPath, String outZipPath) {
    try {
        FileOutputStream fos = new FileOutputStream(outZip);
        ZipOutputStream zos = new ZipOutputStream(fos);
        File srcFile = new File(inputFolder);
        File[] files = srcFile.listFiles();
        Log.d("", "Zip directory: " + srcFile.getName());
        for (int i = 0; i < files.length; i++) {
            Log.d("", "Adding file: " + files[i].getName());
            byte[] buffer = new byte[1024];
            FileInputStream fis = new FileInputStream(files[i]);
            zos.putNextEntry(new ZipEntry(files[i].getName()));
            int length;
            while ((length = fis.read(buffer)) > 0) {
                zos.write(buffer, 0, length);
            }
            zos.closeEntry();
            fis.close();
        }
        zos.close();
    } catch (IOException ioe) {
        Log.e("", ioe.getMessage());
    }
}