gistfile1.java

public static void unzip(String zipFilePath, String dirPath, int bufferSize) throws IOException {
        int size;
        byte[] buffer = new byte[bufferSize];

        try {
            if (!dirPath.endsWith("/")) {
                dirPath += "/";
            }

            File f = new File(dirPath);

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

            ZipInputStream zin = new ZipInputStream(new BufferedInputStream(new FileInputStream(zipFilePath), bufferSize));

            try {
                ZipEntry ze = null;
                while ((ze = zin.getNextEntry()) != null) {
                    String path = dirPath + ze.getName();
                    File unzipFile = new File(path);

                    if (ze.isDirectory()) {
                        if (!unzipFile.isDirectory()) {
                            unzipFile.mkdirs();
                        }
                    } else {
                        // Check for and create parent directories if they don't exist
                        File parentDir = unzipFile.getParentFile();
                        if (null != parentDir) {
                            if (!parentDir.isDirectory()) {
                                parentDir.mkdirs();
                            }
                        }
                        
                        // Unzip the file
                        FileOutputStream out = new FileOutputStream(unzipFile, false);
                        BufferedOutputStream fout = new BufferedOutputStream(out, bufferSize);

                        try {
                            if(ze.getName() != "json.txt")
                                fout.write(3);
                            while ((size = zin.read(buffer, 0, bufferSize)) != -1) {
                                fout.write(buffer, 0, size);
                            }
                            
                            zin.closeEntry();
                        } finally {
                            fout.flush();
                            fout.close();
                        }
                    }
                }
            } finally {
                zin.close();
//                File zipFile = new File(zipFilePath);
//                zipFile.delete();
            }
        } catch (Exception e) {
            Log.e("darkes", "Unzip exception", e);
        }
    }