Add the next element 
To configure multiple elements, after creating a Message object, you can add the next element via the element object of Message. 
The following is the sample code for creating V2TIMTextElem and V2TIMCustomElem: 
V2TIMMessage message = V2TIMManager.getMessageManager().createTextMessage("test"); 
V2TIMCustomElem customElem = new V2TIMCustomElem(); 
customElem.setData("Custom message".getBytes()); 
message.getTextElem().appendElem(customElem);
- Attention
- 
- This API can be called only by elements of a Message object created via createMessage.
- This API can be used to add V2TIMTextElem, V2TIMCustomElem, V2TIMFaceElem, or V2TIMLocationElem.