Download and Extract Zip File in Android [duplicate]

Answer 1

This is the final code using the performance improvement answer, it decompressed a 23 MB file into a 130 MB folder in exactly 1 minute:

public class Decompress {
private String _zipFile;
private String _location;

public Decompress(String zipFile, String location) {
    _zipFile = zipFile;
    _location = location;

    _dirChecker("");
}

public void unzip() {
    try  {
        FileInputStream fin = new FileInputStream(_zipFile);
        ZipInputStream zin = new ZipInputStream(fin);

        byte b[] = new byte[1024];

        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());

                BufferedInputStream in = new BufferedInputStream(zin);
                BufferedOutputStream out = new BufferedOutputStream(fout);

                int n;
                while ((n = in.read(b,0,1024)) >= 0) {
                    out.write(b,0,n);
                }

                zin.closeEntry();
                out.close();
            }

        }
        zin.close();
    } catch(Exception e) {
        Log.e("Decompress", "unzip", e);
    }

}

private void _dirChecker(String dir) {
    File f = new File(_location + dir);

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