Android Utililty Methods Zip Byte Array

Deflater compresser = new Deflater();
compresser.reset();
compresser.setInput(data);
compresser.finish();
byte result[] = new byte[0];
ByteArrayOutputStream o = new ByteArrayOutputStream(1);
try {
    byte[] buf = new byte[CacheSize];
...

String TAG = "ZipUtil : ";
File pathFile = new File(path);
pathFile.mkdirs();
String zipName = path + "\\" + fileName + ".zip";
File file = new File(zipName);
if (!file.exists()) {
    file.createNewFile();
FileOutputStream os = null;
ZipOutputStream out = null;
try {
    os = new FileOutputStream(file);
    out = new ZipOutputStream(os);
    String tmp = new String(fileName.getBytes("UTF-8"));
    tmp = unicodeEscape(tmp);
    ZipEntry entry = new ZipEntry(tmp + ".xml");
    out.putNextEntry(entry);
    out.write(data);
    out.flush();
    out.closeEntry();
    out.flush();
    out.finish();
} catch (Exception e) {
    e.printStackTrace();
    System.err.println(TAG + " Error " + e.toString());
    throw e;
} finally {
    out.close();
    os.close();
return true;