The example Im providing is for the Email Attachments I used. It will give you the idea using Intent.
final Intent ei = new Intent(Intent.ACTION_SEND_MULTIPLE); ei.setType("plain/text"); ei.putExtra(Intent.EXTRA_EMAIL, new String[] {"me@somewhere.nodomain"}); ei.putExtra(Intent.EXTRA_SUBJECT, "That one works");
Add files' uris: ArrayList<Uri> uris = new ArrayList<Uri>();
ei.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris); startActivityForResult(Intent.createChooser(ei, "Sending multiple attachment"), 12345);

That works:
final Intent ei = new Intent(Intent.ACTION_SEND_MULTIPLE); ei.setType("plain/text"); ei.putExtra(Intent.EXTRA_EMAIL, new String[] {"me@somewhere.nodomain"}); ei.putExtra(Intent.EXTRA_SUBJECT, "That one works");
then add files' uris: ArrayList<Uri> uris = new ArrayList<Uri>();
ei.putParcelableArrayListExtra(Intent.EXTRA_STREAM, uris); startActivityForResult(Intent.createChooser(ei, "Sending multiple attachment"), 12345);
Hope that helps.