docs: fix README

Author: codeestX

README.md

@@ -1,16 +1,16 @@
 # RxSocketClient
 
-[![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://github.com/codeestX/RxSocketClient/pulls)[![API](https://img.shields.io/badge/API-20%2B-brightgreen.svg)](https://android-arsenal.com/api?level=20)[![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
+[![PRs Welcome](https://img.shields.io/badge/PRs-welcome-brightgreen.svg)](https://github.com/codeestX/RxSocketClient/pulls) [![API](https://img.shields.io/badge/API-20%2B-brightgreen.svg)](https://android-arsenal.com/api?level=20) [![License](https://img.shields.io/badge/License-Apache%202.0-blue.svg)](https://opensource.org/licenses/Apache-2.0)
 
-RxSocketClient, Reactive Socket APIs for Android, Java and Kotlin, powered by RxJava2
+RxSocketClient, Reactive Socket APIs for Android, Java and Kotlin, powered by RxJava2  
 RxSocketClient，支持Android，Java和Kotlin的响应式Socket APIs封装，基于RxJava2
 
 RxJava2 Version: 2.1.1
 
 # Usage
 
 ### init
-```
+```java
 SocketClient mClient = RxSocketClient
         .create(new SocketConfig.Builder()
                 .setIp(IP)
@@ -38,8 +38,9 @@ SocketClient mClient = RxSocketClient
 | Tail | Optional | appending bytes at last when sending data, not included heartbeat |
 
 ### connect
-```
+```java
 Disposable ref = mClient.connect()
+						... // anything else what you can do with RxJava
                 .observeOn(AndroidSchedulers.mainThread())
                 .subscribe(new SocketSubscriber() {
                     @Override
@@ -61,14 +62,14 @@ Disposable ref = mClient.connect()
 ```
 
 ### disconnect
-```
+```java
 mClient.disconnect();
 //or
 ref.dispose();
 ```
 
 ### sendData
-```
+```java
 mClient.sendData(bytes);
 //or
 mClient.sendData(string);