/**
 * get the pinned message
 * When entering a conversation, query its pinned message through the conversation information
 * @param conversation conversation identifier
 * @param callback result callback
 */
JIM.getInstance().getMessageManager().getTopMessage(conversation, new IMessageManager.IGetTopMessageCallback() {
            @Override
            public void onSuccess(Message message, UserInfo userInfo, long l) {
            }

            @Override
            public void onError(int i) {
            }
        });

// How to retrieve pinned-message updates after entering a conversation
/**
 * listen for pinned-message changes in a conversation
 * Use this listener to receive pinned-message changes and update the message page in real time, for example by broadcasting through EventBus
 * @param listener listener
 */
JIM.getInstance().getMessageManager().addListener("msg", new IMessageManager.IMessageListener() {
            @Override
            /**
             * pinned message
             * @param message message object
             * @param userInfo operator
             * @param b whether the message is pinned
             */
            public void onMessageSetTop(Message message, UserInfo userInfo, boolean b) {
                Log.d(tag, "onMessageSetTop: " + message.toString());
                EventBus.getDefault().post(new MessageTopEvent(message, userInfo, b));
            }
        });