OkHttpClient in android -

i wrote following code send request server , getting response server. when run following code can not work me. wrote code based this link.

public class mainactivity extends activity {     @override     protected void oncreate(bundle bundle) {         super.oncreate(bundle);        setcontentview(r.layout.activity);        button button = (button)findviewbyid(r.id.bu1);         button.setonclicklistener(new view.onclicklistener() {             @override             public void onclick(view v) {                 try {                     run();                 } catch (exception e) {                 toast.maketext(getapplicationcontext(),"error",toast.length_long).show();                 }             }         });     }     private final okhttpclient client = new okhttpclient();     public void run() throws exception {         request request = new request.builder()                 .url("http://127.0.0.1:8080/file.php")                 .build();          call call = client.newcall(request);         response response = call.execute();          if (!response.issuccessful()) {             throw new ioexception("unexpected code " + response);         }         string text = response.body().string();         toast.maketext(getapplicationcontext(), text, toast.length_short).show();     }   } 

usually error because:

1. doesn't have internet permission

2. it in ui thread

you can confirm in logcat.

solution:

1. add in manifest <uses-permission android:name="android.permission.internet" />

2. you must run in other thread or using async 1 this:

   public void run() {     request request = new request.builder()             .url("http://127.0.0.1:8080/file.php")             .build();      call call = client.newcall(request);     call.enqueue(new callback() {         @override         public void onfailure(request request, ioexception e) {             log.d("tag", "failed: " + e.getmessage());         }          @override         public void onresponse(response response) throws ioexception {             log.d("tag", "ok: " + response.body().string());         }     } }