android - Image not loading with Picasso using Rx Observable and Retrofit2 -

i learning rxjava (observable) , retrofit2. landed in situation picasso not loading images url. details below:

public class intentkeys {     public static final long interceptor_timeout = 15;     public static final string popular_movies_service_endpoint = "http://api.themoviedb.org/3/";     public static final string popular_movies_poster_endpoint = "http://image.tmdb.org/t/p/w300/";     public static final string popular_movies_api_key = "key";  } 

the recyclerview adapter:

public class gridviewadapter extends recyclerview.adapter<gridviewadapter.gridvieholder> {      private static final string tag = gridviewadapter.class.getsimplename();     private static final int span_count = 2;     private static final float thumbnail_ratio = 1.5f;     private list<result> movies = new arraylist<>();     private context context;      public gridviewadapter(list<result> movies, context context) {         this.movies = movies;         this.context = context;     }      @override     public gridvieholder oncreateviewholder(viewgroup parent, int viewtype) {          view view = layoutinflater.from(parent.getcontext()).inflate(r.layout.movies_grid_view, parent, false); //        view.getlayoutparams().height = (int) (parent.getwidth() / span_count * thumbnail_ratio);         return new gridvieholder(view);     }      @override     public void onbindviewholder(gridvieholder holder, int position) {          gridvieholder posterholder = (gridvieholder) holder;         posterholder.bind(movies.get(position));         /* result popularmovies = movies.get(position);         string movieposter = popularmovies.getposterpath();         string movieposterurl = intentkeys.popular_movies_poster_endpoint + movieposter;          picasso.with(context).load(movieposterurl.trim())                 .config(bitmap.config.rgb_565)                 .into(posters);*/     }      @override     public int getitemcount() {         return movies.size();     }      public class gridvieholder extends recyclerview.viewholder {          imageview posters;          public gridvieholder(view itemview) {             super(itemview);              posters = (imageview) itemview.findviewbyid(r.id.movies_poster_grid_view);         }          public void bind(final result result) {               uri uri = uri.parse(intentkeys.popular_movies_poster_endpoint).buildupon()                     .appendpath(imagesize.w185.getvalue())                     .appendpath(result.getposterpath().replace("/", ""))                     .build();             picasso.with(itemview.getcontext()).load(uri).into(posters);         }     }  } 

below, how have defined service , retrofit manager:

public interface popularmoviesservice {     @get("movie/popular")     observable<result> getpopularmovies(@query("api_key") string apikey); }  public class popularmoviesretrofitmanager {       private popularmoviesservice service;     private static retrofit retrofit = null;      private static httplogginginterceptor getlogginginterceptor() {         httplogginginterceptor interceptor = new httplogginginterceptor();         interceptor.setlevel(httplogginginterceptor.level.body);         return interceptor;     }      private static okhttpclient getokhttpclient(httplogginginterceptor logginginterceptor) {         return new okhttpclient.builder()                 .addinterceptor(logginginterceptor)                 .connecttimeout(intentkeys.interceptor_timeout, timeunit.seconds)                 .readtimeout(intentkeys.interceptor_timeout, timeunit.seconds)                 .build();     }      public static retrofit getmoviesclient() {          okhttpclient client = getokhttpclient(getlogginginterceptor());          if (retrofit == null) {             retrofit = new retrofit.builder()                     .baseurl(intentkeys.popular_movies_service_endpoint)                     .addconverterfactory(gsonconverterfactory.create())                     .addcalladapterfactory(rxjavacalladapterfactory.create())                     .client(client)                     .build();         }         return retrofit;     }  } 

finally adapter , fragment classes. in activity class, have getsupportfragmentmanager() load fragment.

public class gridviewadapter extends recyclerview.adapter<gridviewadapter.gridvieholder> {      private static final string tag = gridviewadapter.class.getsimplename();     private static final int span_count = 2;     private static final float thumbnail_ratio = 1.5f;     private list<result> movies = new arraylist<>();     private context context;      public gridviewadapter(list<result> movies, context context) {         this.movies = movies;         this.context = context;     }      @override     public gridvieholder oncreateviewholder(viewgroup parent, int viewtype) {          view view = layoutinflater.from(parent.getcontext()).inflate(r.layout.movies_grid_view, parent, false); //        view.getlayoutparams().height = (int) (parent.getwidth() / span_count * thumbnail_ratio);         return new gridvieholder(view);     }      @override     public void onbindviewholder(gridvieholder holder, int position) {          gridvieholder posterholder = (gridvieholder) holder;         posterholder.bind(movies.get(position));         /* result popularmovies = movies.get(position);         string movieposter = popularmovies.getposterpath();         string movieposterurl = intentkeys.popular_movies_poster_endpoint + movieposter;          picasso.with(context).load(movieposterurl.trim())                 .config(bitmap.config.rgb_565)                 .into(posters);*/     }      @override     public int getitemcount() {         return movies.size();     }      public class gridvieholder extends recyclerview.viewholder {          imageview posters;          public gridvieholder(view itemview) {             super(itemview);              posters = (imageview) itemview.findviewbyid(r.id.movies_poster_grid_view);         }          public void bind(final result result) {               uri uri = uri.parse(intentkeys.popular_movies_poster_endpoint).buildupon()                     .appendpath(imagesize.w185.getvalue())                     .appendpath(result.getposterpath().replace("/", ""))                     .build();             picasso.with(itemview.getcontext()).load(uri).into(posters);         }     }  }  public class popularmoviesfragment extends fragment {      private static final string tag = popularmoviesfragment.class.getcanonicalname();     private gridviewadapter gridviewadapter;     private list<result> resultitems = new arraylist<>();;     private subscription moviesubscription;     private recyclerview recyclerview;     private popularmoviesservice service             = popularmoviesretrofitmanager.getmoviesclient().create(popularmoviesservice.class);      public popularmoviesfragment() {     }      @override     public void onattach(context context) {         super.onattach(context);     }      @override     public view oncreateview(layoutinflater inflater, viewgroup container,                              bundle savedinstancestate) {          view view = inflater.inflate(r.layout.fragment_popular_movies, container, false);          recyclerview = (recyclerview) view.findviewbyid(r.id.popular_movies_recycler_view);         recyclerview.sethasfixedsize(true);         recyclerview.layoutmanager layoutmanager = new gridlayoutmanager(getcontext(), 2);         recyclerview.setlayoutmanager(layoutmanager);          gridviewadapter = new gridviewadapter(resultitems, getcontext());         recyclerview.setadapter(gridviewadapter);          return (view);     }      @override     public void oncreate(bundle savedinstancestate) {         super.oncreate(savedinstancestate);         sethasoptionsmenu(true);     }      @override     public void onstart() {         super.onstart();         getmoviessubscription();     }      private void getmoviessubscription() {         moviesubscription = service.getpopularmovies(intentkeys.popular_movies_api_key)                 .subscribeon(schedulers.io())                 .observeon(androidschedulers.mainthread())                 .subscribe(                         new action1<result>() {                             @override                             public void call(result popularmovies) {                              }                          }, new action1<throwable>() {                             @override                             public void call(throwable throwable) {                              }                         }, new action0() {                             @override                             public void call() {                                 displayposters();                                 log.i(tag, "getmoviessubscription: completed");                             }                         }                 );     }      @override     public void ondestroyview() {         super.ondestroyview();         if (moviesubscription != null && moviesubscription.isunsubscribed()) {             moviesubscription.unsubscribe();         }     }      private void displayposters() {         gridviewadapter = new gridviewadapter(resultitems, getcontext());         recyclerview.setadapter(gridviewadapter);         recyclerview.invalidate();     }  } 

the problem is, picasso not loading images in gridview api call. here highly appreciated.

here json format:

{    "page":1,    "results":[       {          "poster_path":"\/5n20rqurev5cndcmjhvuzhpocnc.jpg",          "adult":false,          "overview":"following events of age of ultron, collective governments of world pass act designed regulate superhuman activity. polarizes opinion amongst avengers, causing 2 factions side iron man or captain america, causes epic battle between former allies.",          "release_date":"2016-04-27",          "genre_ids":[             28,             53,             878          ],          "id":271110,          "original_title":"captain america: civil war",          "original_language":"en",          "title":"captain america: civil war",          "backdrop_path":"\/rqahkvxldb9thlnbqdwozri0yvd.jpg",          "popularity":49.819238,          "vote_count":2787,          "video":false,          "vote_average":6.93       },       {          "poster_path":"\/e1mjopzas2knsvpbpahq1a6sksn.jpg", 

here, poster_path should getting images from.

at last, have following console output. see getting response , 200. as, data in response. below console output.

thanks in advance support getting resolve problem.

sorry, forgot layout: movies_grid_view.xml

<?xml version="1.0" encoding="utf-8"?> <linearlayout xmlns:android="http://schemas.android.com/apk/res/android"     android:layout_width="match_parent"     android:layout_height="match_parent"     android:background="@android:color/transparent"     android:orientation="vertical">      <imageview         android:id="@+id/movies_poster_grid_view"         android:layout_width="wrap_content"         android:layout_height="wrap_content" />  </linearlayout> 

here log:

d: classloader referenced unknown path: /data/app/com.example.mchapagai-2/lib/x86_64 w: classloader referenced unknown path: /data/app/com.example.mchapagai-2/lib/x86_64 w: before android 4.1, method android.graphics.porterduffcolorfilter android.support.graphics.drawable.vectordrawablecompat.updatetintfilter(android.graphics.porterduffcolorfilter, android.content.res.colorstatelist, android.graphics.porterduff$mode) have incorrectly overridden package-private method in android.graphics.drawable.drawable d: --> http://api.themoviedb.org/3/discover/movie?api_key=api_key http/1.1 d: --> end d: use egl_swap_behavior_preserved: true     [ 09-13 04:50:41.940  9654: 9654 d/         ]    hostconnection::get() new host connection established 0x7f16976bf100, tid 9654 d: <-- 200 ok http://api.themoviedb.org/3/discover/movie?api_key=api_key (239ms) d: access-control-allow-origin: * d: cache-control: public, max-age=21600 d: content-type: application/json;charset=utf-8 d: date: tue, 13 sep 2016 15:17:15 gmt d: server: openresty d: vary: accept-encoding d: x-ratelimit-limit: 40 d: x-ratelimit-remaining: 39 d: x-ratelimit-reset: 1473779845 d: connection: keep-alive d: {"page":1,"results":[{"poster_path":"\/5n20rqurev5cndcmjhvuzhpocnc.jpg","adult":false,"overview":"following events of age of ultron, collective governments of world pass act designed regulate superhuman activity. polarizes opinion amongst avengers, causing 2 factions side iron man or captain america, causes epic battle between former allies.","release_date":"2016-04-27","genre_ids":[28,53,878],"id":271110,"original_title":"captain america: civil war","original_language":"en","title":"captain america: civil war","backdrop_path":"\/rqahkvxldb9thlnbqdwozri0yvd.jpg","popularity":48.757871,"vote_count":2812,"video":false,"vote_average":6.92},{"poster_path":"\/e1mjopzas2knsvpbpahq1a6sksn.jpg","adult":false,"overview":"from dc comics comes suicide squad, antihero team of incarcerated supervillains act deniable assets 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turtles","backdrop_path":"\/oqcxgt5nl1chpeotxcdvxlle6p.jpg","popularity":13.480196,"vote_count":1660,"video":false,"vote_average":5.9}],"total_results":279563,"total_pages":13979} d: <-- end http (12492-byte body) i: getmoviessubscription: completed     [ 09-13 04:50:42.309  9654: 9699 d/         ]    hostconnection::get() new host connection established 0x7f16a00bffc0, tid 9699 i: initialized egl, version 1.4 w: setting airplane_mode_on has moved android.provider.settings.system android.provider.settings.global, returning read-only value. d: poster url: http://image.tmdb.org/t/p/w185/null d: dispatcher  enqueued     [r0]+108ms  d: hunter      executing    [r0]+156ms  d: dispatcher  batched      [r0]+320ms error d: dispatcher  delivered    [r0]+560ms  d: main        errored      [r0]+560ms  

i think problem uri passed picasso

uri uri = uri.parse(intentkeys.popular_movies_poster_endpoint).buildupon()                 .appendpath(imagesize.w185.getvalue())                 .appendpath(result.getposterpath().replace("/", ""))                 .build(); 

it should have key query parameter.