Source Code Download File dari URL di Android

//public variable
DownloadManager downloadManager;
String ip="https://androidtonyaray.blogspot.com/"
String path="ypathfile/dokumen.pdf";
String url=ip+path;

//button onCreate
Button btnDownload=(Button)findViewbyid(R.id.btnDownload);
btnDownload.setOnClickListener(new View.OnClickListener() {
 @Override  public void onClick(View arg0) {
  downloadManager = (DownloadManager)getSystemService(Context.DOWNLOAD_SERVICE);
  Uri uri= Uri.parse(url);
  DownloadManager.Request request = new DownloadManager.Request(uri);
  equest.setNotificationVisibility(DownloadManager.Request.VISIBILITY_VISIBLE_NOTIFY_COMPLETED);
Long reference = downloadManager.enqueue(request);
 Toast.makeText(getBaseContext(), "File berhasil didownload...", Toast.LENGTH_LONG).show();

}});