android - Downloading the image using OkHttp gives null -

i tried download image url using okhttp . returns null.

i have permissions

<uses-permission android:name="android.permission.internet"/> <uses-permission android:name="android.permission.access_network_state"/> 

here rest client

 public class restclient {      private static volatile restclient instance;     private final okhttpclient client;      private restclient(context context) throws exception {         client = new okhttpclient();     }      public static restclient getinstance(context context) throws exception {         if (instance == null)             synchronized (restclient.class) {                 if (instance == null)                     instance = new restclient(context);             }         return instance;     }      public call uploadpicture(callback callback){         string link = "http://www.101apps.co.za/images/headers/101_logo_very_small.jpg";         request request = new request.builder()                 .url(string.format(link))                 .get()                 .build();         call call = client.newcall(request);         call.enqueue(callback);         return call;     } } 

here getpicture method in main activity

   public void getpicbyurl() {          try {             restclient.getinstance(getactivity()).uploadpicture(new callback() {                  @override                 public void onfailure(request request, ioexception e) {                     e.printstacktrace();                 }                  @override                 public void onresponse(response response) throws ioexception {                      final string json = response.body().string();                     if (response.code() == constants.successful_download) {                         responsebody in = response.body();                         inputstream inputstream = in.bytestream();                         bufferedinputstream bufferedinputstream = new bufferedinputstream(inputstream);                                                 updateimage(bitmapfactory.decodestream(bufferedinputstream));                     }                  }             });         } catch (exception e) {             e.printstacktrace();         }     }     private void updateimage(final bitmap bitmap) {          new handler(looper.getmainlooper()).post(new runnable() {             @override             public void run() {                 if (bitmap != null) {                     mselectedpic.setimagebitmap(bitmap);                 } else {                     toast.maketext(getactivity(), r.string.show_error, toast.length_short).show();                 }             }         });   } 

updateimage() method takes bitmap = null. don`t know doing wrong. please help.

with current url (http://www.101apps.co.za/images/headers/101_logo_very_small.jpg) , purpose (loading image imageview only), suggest use picasso or glide instead.

sample code if using picasso:

        imageview imageview = (imageview) findviewbyid(r.id.imageview);         picasso.with(this)                 .load("http://www.101apps.co.za/images/headers/101_logo_very_small.jpg")                 .into(imageview); 

hope helps!