how to download file one by one in listview android studio? : i have source code from https://awsrh.blogspot.com/2018/05/volley-glide-tutorial-send-data-and.html

i want make  download file one by one for download pdf file 

[Example][1]


how to add button download file pdf from server?﻿


  [1]: https://i.stack.imgur.com/o0ji5.png