How to get the stomp protocol data sent by the server to the client when the connection is successful? Do you need to subscribe to topic?

[Arisono]

Client code

mStompClient.lifecycle()
                .subscribeOn(Schedulers.io())
                .observeOn(AndroidSchedulers.mainThread())
                .subscribe(lifecycleEvent -> {
                    switch (lifecycleEvent.getType()) {
                        case OPENED:               
                            toast("connection success！");
                            Log.i(TAG, "This data comes from the server:"+JSON.toJSONString(lifecycleEvent));
                             
// How to get the stomp protocol data sent by the server to the client when the 
//connection is successful? Do you need to subscribe to topic?               
//                          mStompClient.send("/connectioned", "connectioned topic")
//                                    .compose(applySchedulers())
//                                    .subscribe(() -> {
//                                        Log.d(TAG, "send success!");
//                                    }, throwable -> {
//                                        Log.e(TAG, "send errors", throwable);
//                                        toast(throwable.getMessage());
//                                    });
                            break;

There is no message data sent by the server to the custom format of the client.

This data comes from the server:{"handshakeResponseHeaders":{"Connection":"upgrade","Date":"Tue, 26 Jun 2018 08:51:19 GMT","Sec-WebSocket-Accept":"Ocn01vRvUiTfnP9HVg55kNI6zy8=","Upgrade":"websocket"},"type":"OPENED"}

Server code:

`return new WebSocketHandlerDecorator(handler){

				@Override
				public void afterConnectionEstablished(
						WebSocketSession session) throws Exception {
					try {	
                                                    //send data			
						session.sendMessage(new WebSocketMessage<String>() {
                               
							@Override
							public String getPayload() {				
								return "CONNECT"
										+ "version:1.1,1.0"
										+ "heart-beat:5000,5000";
							}

							@Override
							public int getPayloadLength() {
								return 500;
							}

							@Override
							public boolean isLast() {				
								return false;
							}
						});
					} catch (Exception e) {			
						e.printStackTrace();
					}

					super.afterConnectionEstablished(session);
				}`

How does the client get the data sent by the server when the connection is successful?