Very good solution how to create zip archive by Java code on Android Zipping Files with Android (Programmatically).
I created a separate Class file Compress.java
import android.util.Log; import java.io.BufferedInputStream; import java.io.BufferedOutputStream; import java.io.FileInputStream; import java.io.FileOutputStream; import java.util.zip.ZipEntry; import java.util.zip.ZipOutputStream; public class Compress { private static final int BUFFER = 2048; private String[] _files; private String _zipFile; public Compress(String[] files, String zipFile) { _files = files; _zipFile = zipFile; } public void zip() { try { BufferedInputStream origin = null; FileOutputStream dest = new FileOutputStream(_zipFile); ZipOutputStream out = new ZipOutputStream(new BufferedOutputStream(dest)); byte data[] = new byte[BUFFER]; for(int i=0; i < _files.length; i++) { Log.v("Compress", "Adding: " + _files[i]); FileInputStream fi = new FileInputStream(_files[i]); origin = new BufferedInputStream(fi, BUFFER); ZipEntry entry = new ZipEntry(_files[i].substring(_files[i].lastIndexOf("/") + 1)); out.putNextEntry(entry); int count; while ((count = origin.read(data, 0, BUFFER)) != -1) { out.write(data, 0, count); } origin.close(); } out.close(); } catch(Exception e) { e.printStackTrace(); } } }
To use this class in you Activity, do the following code:
File dir = new File(Environment.getExternalStorageDirectory(), "mydir"); String zipName = dir.toString()+"zipname.zip"; String[] files = new String[] {dir.toString()+"file_one.jpg", dir.toString()+"file_two.gif"}; Compress c = new Compress(files, zipName); c.zip();