The Android learning exchange-CodePudding

Empty time will come within the scope of the ability to help students answer questions, reply format:
1. Problem description
2. Key code + log

CodePudding user response:

1. The JSONObject jsonObj=new JSONObject (data). GetJSONObject (" serverinfo ");
The line
Why error

 String data=(https://bbs.csdn.net/topics/response.body). The String (); 
The d (" test ", "onResponse:" + response + "-- -- -- -- --" + data). 
Try {
JSONObject jsonObj=new JSONObject (data). GetJSONObject (" serverinfo "); 
Int id=jsonObj. Get int (" CarSpeed "); 

Gson_json. SetText (" speed "+ id); 
} the catch (JSONException e) {
System. The out. Println (" Json parse error "); 
e.printStackTrace(); 
}

 D/test: onResponse: the Response {=HTTP/1.1 protocol, code=200, message=, url=http://192.168.31.120:8080/transportservice/type/jason/action/GetCarSpeed.do} - {" serverinfo ":" {12} \ "CarSpeed " : \ n "} 
I/System. Out: Json parse error 
W/System. Err: org. Json. JSONException: Value {12} "CarSpeed" : 
The at serverinfo of type Java. Lang. String always be converted to JSONObject 
W/System. Err: at org. Json. Json. TypeMismatch (json. Java: 100) 
The at org. Json. JSONObject. GetJSONObject (JSONObject. Java: 613) 
At com. Example. Tomlin. Post_get. OkHttpClientActivity $2 $1. OnResponse (OkHttpClientActivity. Java: 167) 
The at okhttp3. RealCall $AsyncCall. Execute (RealCall. Java: 153) 
The at okhttp3. Internal. NamedRunnable. Run (NamedRunnable. Java: 32) 
The at Java. Util. Concurrent. ThreadPoolExecutor. RunWorker (ThreadPoolExecutor. Java: 1113) 
The at Java. Util. Concurrent. ThreadPoolExecutor $Worker. The run (ThreadPoolExecutor. Java: 588) 
The at Java. Lang. Thread. The run (Thread. Java: 818)

CodePudding user response:

You have a look at your data print, serverinfo may lack escape character cannot be identified, give it a try

CodePudding user response:

reference 1st floor weixin_44090202 response:

1. The JSONObject jsonObj=new JSONObject (data). GetJSONObject (" serverinfo ");

Your serverinfo is string, haven't seen a quote, please {" serverinfo ":" {... }} ", get string first, then the string into jsonobj

CodePudding user response:

reference 3 floor wang can reply:

Quote: refer to 1st floor weixin_44090202 response:

1. The JSONObject jsonObj=new JSONObject (data). GetJSONObject (" serverinfo ");

Your serverinfo is string, haven't seen a quote, please {" serverinfo ":" {... }} ", get string first, then the string into jsonobj

Dubious, blind, I can't see, what I said,

CodePudding user response:

Could you tell me why the return value is the beginning of

 package com. Lenovo. Smarttraffic. Post; 
The import android. Util. Log; 
import java.io.IOException; 
The import okhttp3. MediaType; 
The import okhttp3. OkHttpClient; 
The import okhttp3. Request; 
The import okhttp3. RequestBody; 
The import okhttp3. The Response; 

Public class Post {
Private String data="https://bbs.csdn.net/topics/original data". 
Public String SendPost (url String, the String sendJson) {
New Thread () {
@ Override 
Public void the run () {
The String data. 
Super. The run (); 
OkHttpClient client=new OkHttpClient (); 
RequestBody body=RequestBody. Create (MediaType. Parse (" application/json; Charset=utf-8 "), sendJson); 
Request the Request=new Request. The Builder (). The url (url). The post (the body). The build (); 
The Response the Response=null; 
Try {
The response=client. NewCall (request). The execute (); 
Data=(https://bbs.csdn.net/topics/response.body). The string (); 
The d (" access to the data value ", data); 
} the catch (IOException e) {
e.printStackTrace(); 
} 

} 
}.start(); 

return data; 
} 

}

CodePudding user response:

The

reference 5 floor 瑓瑆 response:

could you tell me why the return value is the beginning of

 package com. Lenovo. Smarttraffic. Post; 
The import android. Util. Log; 
import java.io.IOException; 
The import okhttp3. MediaType; 
The import okhttp3. OkHttpClient; 
The import okhttp3. Request; 
The import okhttp3. RequestBody; 
The import okhttp3. The Response; 

Public class Post {
Private String data="https://bbs.csdn.net/topics/original data". 
Public String SendPost (url String, the String sendJson) {
New Thread () {
@ Override 
Public void the run () {
The String data. 
Super. The run (); 
OkHttpClient client=new OkHttpClient (); 
RequestBody body=RequestBody. Create (MediaType. Parse (" application/json; Charset=utf-8 "), sendJson); 
Request the Request=new Request. The Builder (). The url (url). The post (the body). The build (); 
The Response the Response=null; 
Try {
The response=client. NewCall (request). The execute (); 
Data=(https://bbs.csdn.net/topics/response.body). The string (); 
The d (" access to the data value ", data); nullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnullnull