zipinputstream – Tarik Billa

How to speed up unzipping time in Java / Android?

September 24, 2023 by Tarik

I don’t know if unzipping on Android is slow, but copying byte for byte in a loop is surely slowing it down even more. Try using BufferedInputStream and BufferedOutputStream – it might be a bit more complicated, but in my experience it is worth it in the end. BufferedInputStream in = new BufferedInputStream(zin); BufferedOutputStream out … Read more

getInputStream for a ZipEntry from ZipInputStream (without using the ZipFile class)

September 22, 2023 by Tarik

it works this way static InputStream getInputStream(File zip, String entry) throws IOException { ZipInputStream zin = new ZipInputStream(new FileInputStream(zip)); for (ZipEntry e; (e = zin.getNextEntry()) != null;) { if (e.getName().equals(entry)) { return zin; } } throw new EOFException(“Cannot find ” + entry); } public static void main(String[] args) throws Exception { InputStream in = getInputStream(new … Read more