How to get full message body in Gmail?

Question

I want to get full message body. So I try:

Message gmailMessage = service.users().messages().get(\"me\", messageId).setFormat(\"full\").execute();


        

Answer 1

When we get full message. The message body is inside Parts.

This is an example in which message headers (Date, From, To and Subject) are displayed and Message Body as a plain text is displayed. Parts in Payload returns both type of messages (plain text and formatted text). I was interested in Plain text.

Message msg = service.users().messages().get(user, message.getId()).setFormat("full").execute();
// Displaying Message Header Information
for (MessagePartHeader header : msg.getPayload().getHeaders()) {
  if (header.getName().contains("Date") || header.getName().contains("From") || header.getName().contains("To")
      || header.getName().contains("Subject"))
    System.out.println(header.getName() + ":" + header.getValue());
}
// Displaying Message Body as a Plain Text
for (MessagePart msgPart : msg.getPayload().getParts()) {
  if (msgPart.getMimeType().contains("text/plain"))
    System.out.println(new String(Base64.decodeBase64(msgPart.getBody().getData())));
}