Use android.content.Intent.ACTION_SENDTO
(new Intent(Intent.ACTION_SENDTO);
) to get only the list of e-mail clients, with no facebook or other apps. Just the email clients.
I wouldn’t suggest you get directly to the email app. Let the user choose his favorite email app. Don’t constrain him.
If you use ACTION_SENDTO, putExtra does not work to add subject and text to the intent. Use Uri to add the subject and body text.
Example
Intent send = new Intent(Intent.ACTION_SENDTO);
String uriText = "mailto:" + Uri.encode("[email protected]") +
"?subject=" + Uri.encode("the subject") +
"&body=" + Uri.encode("the body of the message");
Uri uri = Uri.parse(uriText);
send.setData(uri);
startActivity(Intent.createChooser(send, "Send mail..."));