Android startup default mail client, multi-attachment issue

The app you are currently developing needs to send mail, so you need to call the Android default mail client and need to add multiple message attachments, which component should I call the default client? What components are used to support e-mail for multiple attachments?

By which of the following?
(
Intent.action_send,
Intent.action_sendto,
Intent.action_send_multiple, ...
)?

Processing methods

After the Android email source code, can be found at the end of the following code

You can try it, I haven't tried ...

Original address: http://www.itmmd.com/201411/182.html
This article by Meng Meng's IT person to organize the release, reprint must indicate the source.

Android startup default mail client, multi-attachment issue