How to speed up unzipping time in Java / Android?

Question

Unzipping files on android seems to be dreadfully slow. At first I thought this was just the emulator but it appears to be the same on the phone. I\'ve tried different compr

Answer 1

Just call this method and it will give you much better performance..

    public boolean unzip(Context context) {
    try {
        FileInputStream fin = new FileInputStream(_zipFile);
        ZipInputStream zin = new ZipInputStream(fin);
        BufferedInputStream in = new BufferedInputStream(zin);
        ZipEntry ze = null;
        while ((ze = zin.getNextEntry()) != null) {
            Log.v("Decompress", "Unzipping " + ze.getName());

            if (ze.isDirectory()) {
                _dirChecker(ze.getName());
            } else {
                FileOutputStream fout = new FileOutputStream(_location
                        + ze.getName());
                    BufferedOutputStream out = new BufferedOutputStream(fout);
                    byte b[] = new byte[1024];
                for (int c = in.read(b,0,1024); c != -1; c = in.read()) {
                    out.write(b,0,c);
                }
                zin.closeEntry();
                fout.close();
            }
        }
        zin.close();
        return true;
    } catch (Exception e) {
        Log.e("Decompress", "unzip", e);
        return false;
    }
}

    private void _dirChecker(String dir) {
    File f = new File(_location + dir);
    if (!f.isDirectory()) {
        f.mkdirs();
    }
}