Okhttp call problem-CodePudding

Recently to see android version 3 of the first line of code page 746, according to the book code no input, also do not complain, please master advice thank you

 
Override fun onCreate (savedInstanceState: Bundle? {
Super. OnCreate (savedInstanceState) 
Val binding=ActivityHttpURLConnectionBinding. Inflate (layoutInflater) 
The setContentView (binding. Root) 
Binding. BtnShow. SetOnClickListener {
Log. I (TAG, "click BTN============") 
Val response=HttpUtil. SendOkHttpRequest (strURL2, object: Callback {//this method call without output and no error message  
Override fun onFailure (call: call, e: IOException) {
The Log i. (TAG, "11111111111111111111111") 
E.p rintStackTrace () 
The Log i. (TAG, "sendOkHttpRequest Callback err: ${e. oString ()}") 
} 

Override fun onResponse (call: the call, the response: the response) {
The Log i. (TAG, "22222222222222222222") 
Val responseData=https://bbs.csdn.net/topics/response.body? String ()//get the value 
ShowResponse (responseData) 
} 
}) 
//sendRequestWithOKHttp ()//separate okhttp request method 
} 
} 


/* * 
* network operating public class 
*/
The object HttpUtil {
Private val TAG="HttpUtil_wp 
"Private val PORT=8000 
//OKhttp request method, than ordinary simple HTTP request method 
Fun sendOkHttpRequest (address: String, the callback: okhttp3. Callback) {
Val client=OkHttpClient () 
Val request=request. Builder (). The url (address). The build () 
Client. NewCall (request) equals (the callback)//internal has good child thread, in the child thread that executes the HTTP request, the results returned to the callback 
}