【即时通信IM】红包消息如何构建？

//构建一条新的消息
TIMMessage msg = new TIMMessage();
try{
    //填充自定义的消息协议
    JSONObject redPacket= new JSONObject();
    redPacket.put("type", "RED_PACKET");
    redPacket.put("amount", 2018);
    redPacket.put("msg", "Happy new year!");

    //根据自己定义的协议构建自定义消息元素
    TIMCustomElem customElem = new TIMCustomElem();
    customElem.setDesc("red packet");
    customElem.setData(redPacket.toString().getBytes("utf-8");
    if(msg.addElement(customElem) != 0){
        Log.e(TAG, "add custom elem failed");
        return;
    }
}catch(Exception e){
    Log.e(TAG, "build custom elem failed");
    return;
}

//设置消息优先级为高优先级
msg.setPriority(TIMMessagePriority.High);