java - Folder are file not zipping -

i have implemented zip folder or file download , saving memory. problem is, downloading without error not getting zip file, , if click on downloaded file showing:

can't show

or

can't display message.

my code:

string filename = tvtitle.gettext().tostring();         string fileextension = tvtype.gettext().tostring();         file imagedirectory = new file(path);         imagedirectory.mkdirs();         int filelength = connection.getcontentlength();         string _path = path;         input = connection.getinputstream();         file outputfile = new file(_path, filename + fileextension);         fileoutputstream fos = new fileoutputstream(outputfile);         zipoutputstream zos = new zipoutputstream(fos);         file srcfile = new file(input.tostring());         byte[] buffer = new byte[1024];         zos.putnextentry(new zipentry(srcfile.getname()));         int length;         while ((length = input.read(buffer)) > 0) {              zos.write(buffer, 0, length);          }         zos.closeentry();         input.close();         zos.close(); 

i don't know type of variable "input"

i think should have fileinputstream (reading source file) paired fileoutputstream (set destination/zip file).

and line of code:

file outputfile = new file(_path, filename + fileextension); 

your output must .zip file right? so, should be:

file outputfile = new file(_path, filename + ".zip"); 

or similar

and this

string filename = tvtitle.gettext().tostring(); string fileextension = tvtype.gettext().tostring(); file imagedirectory = new file(path); fileinputstream fis = new fileinputstream(imagedirectory); zipentry zipentry = new zipentry(filename);  fileoutputstream fos = new fileoutputstream("test.zip"); zipoutputstream zos = new zipoutputstream(fos); zos.putnextentry(zipentry); byte[] bytes = new byte[1024]; int length;     while ((length = fis.read(bytes)) >= 0) {         zos.write(bytes, 0, length);     } zos.closeentry(); fis.close(); zos.close(); fos.close();