Android: how to override ContentProvider's ParcelFileDescriptor openFile method to send file from url as attachment via email? -

i've searched lot did not stumble upon have do. when click send email file shown attached never receive attached file there special way send attachments receive url? here activity code: http://pastebin.com/uzdjyxab[2] , here project https://docs.google.com/file/d/0b-91m-6zevwcrtytyxrgb3l6uve/edit?usp=sharing code "send email" button: sendemail_button.setonclicklistener(new onclicklistener() {

                    @override                     public void onclick(view v) {                             // todo auto-generated method stub                             intent intent = new intent(intent.action_send_multiple);                             intent.settype("*/*");                             intent.putextra(intent.extra_subject, "attachment app");                             intent.putextra(intent.extra_text, "sending mp3 file " + title);                              intent.putextra(intent.extra_email, new string[] {"some_email@email.com"});                             arraylist<uri> uris = new arraylist<uri>();                              uris.add(uri.fromfile(new file(trackurl)));                              intent.putparcelablearraylistextra(intent.extra_stream, uris);                              startactivity(intent.createchooser(intent, "send mail"));                     }             });     

maybe there has other way put audio file url intent? have use intent.putparcelablearraylistextra(intent.extra_stream, uri); part of task. skipped part

action_send_multiple use external activity should access sound file. allow such access need: - create contentprovider. - override public parcelfiledescriptor openfile(uri uri, string mode)

does mean use of content provider can , put file url email attachment? googled did not find how correctly override public parcelfiledescriptor openfile(uri uri, string mode), maybe @ least point me in right direction? again i'm not asking solve this, @ least point me out mistakes , give advise.

you don't need content provider if files in public directory. in way :

private void launchshareactivity(final list<string> exported_filenames) {     log.v(debug_tag, "launchshareactivity");     final intent intent = new intent(intent.action_send_multiple);     intent.settype("*/*");     if (exported_filenames.size() == 0) {         log.i(debug_tag, "there no file share");         return;     }     final arraylist<uri> uris = new arraylist<uri>();     (final string exported_file : exported_filenames) {         final file f = new file(exported_file);         uris.add(uri.fromfile(f));     }     intent.putparcelablearraylistextra(intent.extra_stream, uris);     activity.startactivity(intent.createchooser(intent, "send page")); }