Attach image to gmail

Question

I have an app that open Gmail. I have to attach an image on email, but i don't know how. I tried to copy the HTML on the body of email, but Gmail don't read HTML. How can I do?

Answer 1

From Uploading attachments

Example: Simple upload

The following example shows the use of a simple upload request for the Gmail API.

POST /upload/gmail/v1/users/userId/messages/send?uploadType=media HTTP/1.1
Host: www.googleapis.com
Content-Type: message/rfc822
Content-Length: number_of_bytes_in_file
Authorization: Bearer your_auth_token

Email Message data