is.close();
                fos.close();
                Decompress d=new Decompress(productDirectory+"/downloadedfile.zip",productDirectory+"/unzipped/" );
                d.unzip();
                File zipfile=new File(productDirectory+"/downloadedfile.zip");
                zipfile.delete();
                productDirectory=new File(Environment.getExternalStorageDirectory().toString()+"/zipfiledemo");
                boolean isWriteLocked= productDirectory.setReadOnly();
                Log.v("Writing access locked",">>>>>>>>>>>>>>>>>>>"+isWriteLocked);