How to access my Spring Boot Websocket (Stomp) in my android application?

I have implemented simple backend using Spring boot which supports Stomp Websocket. It takes the message from user and send it to the specific url. Here is the code in spring boot.

Controller

package com.dakshverma.chattime.controller;

import com.dakshverma.chattime.model.Message;
import com.dakshverma.chattime.model.MessageResponse;
import org.springframework.messaging.handler.annotation.MessageMapping;
import org.springframework.messaging.handler.annotation.SendTo;
import org.springframework.stereotype.Controller;

import javax.websocket.server.PathParam;

@Controller
public class ChatController {

    @MessageMapping("/msg/{t}")
    @SendTo("/topic/{t}")
    public MessageResponse sendMessage(@PathParam("t") String t, Message message){
        return new MessageResponse(message.getText(), message.getUsername());
    }
}

Config

package com.dakshverma.chattime.config;

import com.dakshverma.chattime.model.Message;
import org.springframework.messaging.simp.config.MessageBrokerRegistry;
import org.springframework.web.socket.config.annotation.StompEndpointRegistry;
import org.springframework.web.socket.config.annotation.WebSocketMessageBrokerConfigurer;

public class WebSocketConfig implements WebSocketMessageBrokerConfigurer {

    @Override
    public void registerStompEndpoints(StompEndpointRegistry registry){
        registry.addEndpoint("/chatsocket").withSockJS();
        registry.addEndpoint("/chatsocket");
    }

    @Override
    public void configureMessageBroker(MessageBrokerRegistry registry){
        registry.enableSimpleBroker("/topic");
        registry.setApplicationDestinationPrefixes("/app");
    }

}

Can someone explain me how do I connect my android application to the backend?