Android Use System Mail App to Send Mail

以下代码可以发送邮件，并且附带附件

try {            Intent intent = new Intent(Intent.ACTION_SEND_MULTIPLE);            String[] tos = {"[e-mail]"};            intent.putExtra(Intent.EXTRA_EMAIL, tos);            intent.putExtra(Intent.EXTRA_TEXT, "body");            intent.putExtra(Intent.EXTRA_SUBJECT, "subject");            ArrayList<Uri> Uris = new ArrayList<Uri>();            Uris.add(Uri.parse("file:///mnt/sdcard/1234.txt"));            intent.putParcelableArrayListExtra(Intent.EXTRA_STREAM, Uris);            intent.setType("image/*");            Intent.createChooser(intent, "Choose Email Client");            startActivity(intent);        }        catch (Exception e)        {            e.printStackTrace();        }