android: make zip file of folder existing in Sdcard ,contains lots of .vcf file
<p>i want to make a zipped of a folder which is in side the the sdcard of device i want to make a zipped file of its and want to send as attachment as in mail. 
so pls any one suggest me how to make a zipped file and when my zipping is  in progress, display the percentage of task finished , means as asynchronously .  means visible to the user as zipping is is progress ..
pls help me 
waiting for response.</p>

<pre><code>public void get()
            {
                vfile = "Contacts" + "_" + System.currentTimeMillis()+".vcf";

                //String vfile = "Contacts"+".vcf";
                //cursor.moveToFirst();

                    // TODO Auto-generated catch block
                    e1.printStackTrace();
                }
            }
</code></pre>
