Model Class für Zomato Android API

Hallo Ich versuche eine App zu entwickeln, für die ich eine Liste von Restaurants in einer bestimmten Stadt brauche. Ich versuche, die Zomato API für das selbe zu benutzen. Aus der Dokumentation unter habe ich gefühlt, dass die/Geocode-Methode am ehesten zu dem passt, was ich brauche. Eine Probe Antwort für diese sieht wie folgt aus -Model Class für Zomato Android API

{"location": { 
"entity_type": "", 
"entity_id": 0, 
"title": "Al Quoz", 
"latitude": "25.1345620000", 
"longitude": "55.2365110000", 
"city_id": 51, 
"city_name": "Dubai", 
"country_id": 214, 
"country_name": "UAE" 
}, 
"popularity": { 
"popularity": "2.02", 
"nightlife_index": "0.00", 
"nearby_res": [ 
    "18274882", 
    "206670", 
    "18279664", 
    "18264893", 
    "208532", 
    "210411", 
    "207764", 
    "18279641", 
    "203695" 
], 
"top_cuisines": [ 
    "Indian", 
    "Chinese", 
    "Middle Eastern", 
    "Pakistani", 
    "Arabian" 
], 
"popularity_res": "100", 
"nightlife_res": "10", 
"subzone": "Al Quoz", 
"subzone_id": 51301, 
"city": "Dubai" 
}, 
"link": "https://www.zomato.com/dubai/al-quoz-restaurants?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1", 
    "nearby_restaurants": { 
"1": { 
    "restaurant": { 
    "R": { 
     "res_id": 18274882 
    }, 
    "apikey": "--", 
    "id": "18274882", 
    "name": "Ice Lab", 
    "url": "https://www.zomato.com/dubai/ice-lab-al-quoz?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1", 
    "location": { 
     "address": "Behind Al Quoz Pond Park, Meydan Road, Al Quoz, Dubai", 
     "locality": "Al Quoz", 
     "city": "Dubai", 
     "city_id": 51, 
     "latitude": "0.0000000000", 
     "longitude": "0.0000000000", 
     "zipcode": "", 
     "country_id": 214 
    }, 
    "cuisines": "Ice Cream", 
    "average_cost_for_two": 85, 
    "price_range": 2, 
    "currency": "AED", 
    "offers": [], 
    "thumb": "https://b.zmtcdn.com/images/res_avatar_120_1x_new.png", 
    "user_rating": { 
     "aggregate_rating": "3.7", 
     "rating_text": "Very Good", 
     "rating_color": "5BA829", 
     "votes": "30" 
    }, 
    "photos_url": "https://www.zomato.com/dubai/ice-lab-al-quoz/photos#tabtop?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1", 
    "menu_url": "https://www.zomato.com/dubai/ice-lab-al-quoz/menu#tabtop?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1", 
    "featured_image": "", 
    "has_online_delivery": 0, 
    "is_delivering_now": 0, 
    "deeplink": "zomato://r/18274882", 
    "events_url": "https://www.zomato.com/dubai/ice-lab-al-quoz/events#tabtop?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1" 
    } 
}, 
"2": { 
    "restaurant": { 
    "R": { 
     "res_id": 206670 
    }, 
    "apikey": "--", 
    "id": "206670", 
    "name": "Dubai Amaravathi", 
    "url": "https://www.zomato.com/dubai/dubai-amaravathi-al-quoz?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1", 
    "location": { 
     "address": "Behind Old Grand Mall, Al Quoz, Dubai", 
     "locality": "Al Quoz", 
     "city": "Dubai", 
     "city_id": 51, 
     "latitude": "25.1465708500", 
     "longitude": "55.2434410527", 
     "zipcode": "", 
     "country_id": 214 
    }, 
    "cuisines": "Indian, North Indian, South Indian, Chinese", 
    "average_cost_for_two": 50, 
    "price_range": 2, 
    "currency": "AED", 
    "offers": [], 
    "thumb": "https://b.zmtcdn.com/data/pictures/0/206670/a6140b8b6205d23c5fa123c7faeb7857_res_featured_thumb.png", 
    "user_rating": { 
     "aggregate_rating": "3.2", 
     "rating_text": "Good", 
     "rating_color": "9ACD32", 
     "votes": "40" 
    }, 
    "photos_url": "https://www.zomato.com/dubai/dubai-amaravathi-al-quoz/photos#tabtop?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1", 
    "menu_url": "https://www.zomato.com/dubai/dubai-amaravathi-al-quoz/menu#tabtop?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1", 
    "featured_image": "https://b.zmtcdn.com/data/pictures/0/206670/a6140b8b6205d23c5fa123c7faeb7857_featured_v2.png", 
    "has_online_delivery": 1, 
    "is_delivering_now": 1, 
    "deeplink": "zomato://r/206670", 
    "order_url": "https://www.zomato.com/dubai/dubai-amaravathi-al-quoz/order?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1", 
    "order_deeplink": "", 
    "events_url": "https://www.zomato.com/dubai/dubai-amaravathi-al-quoz/events#tabtop?utm_source=api_basic_user&utm_medium=api&utm_campaign=v2.1" 
    } 
} 
} 
} 
}

Ich versuche, ein Android Modellklasse für das gleiche zu schaffen, um die Reaktion mit Gson zu analysieren. Mein Ziel ist es, einfach die "Restaurant" -Objekte in eine Liste zu bekommen, damit ich sie dem Kartenansichtsadapter geben kann.

Zur Zeit ist das, was mein Modell aussieht -

public class RestaurantsZomato { 

public LocationDetails location; 
public Popularity popularity; 
public String link; 
public NearbyRestaurants nearby_restaurants; 

public static class LocationDetails { 
    public String entity_type; 
    public int entity_id; 
    public String title; 
    public String latitude; 
    public String longitude; 
    public int city_id; 
    public String city_name; 
    public int country_id; 
    public String country_name; 
} 

public static class Popularity { 
    public String popularity; 
    public String nightlife_index; 
    public List<String> nearby_res; 
    public List<String> top_cuisines; 
    public String popularity_res; 
    public String nightlife_res; 
    public String subzone; 
    public int subzone_id; 
    public String city; 
} 

public static class NearbyRestaurants { 

    public RestaurantDetails restaurant; 
} 

public class RestaurantDetails { 

public Rest R; 
public String apikey; 
public String id; 
public String name; 
public String url; 
public LocationDetails location; 
public String cuisines; 
public String average_cost_for_two; 
public String price_range; 
public String currency; 
public List<String> offers; 
public String thumb; 
public UserRating user_rating; 
public String photos_url; 
public String menu_url; 
public String featured_image; 
public String has_online_delivery; 
public String is_delivering_now; 
public String deeplink; 
public String events_url; 
public String all_reviews_count; 
public String photo_count; 
public String phone_numbers; 

public LocationDetails getLocation(){ 
    return location; 
} 

public static class LocationDetails { 
    public String address; 
    public String locality; 
    public String city; 
    public String latitude; 
    public String longitude; 
    public String zipcode; 
    public String country_id; 

    public String getAddress() { 
     return address; 
    } 
} 

    public static class UserRating { 
    public static String aggregate_rating; 
    public String rating_text; 
    public String rating_color; 
    public String votes; 
} 

public static class Rest { 
    public float res_id; 
}

}

Und in meinem Fragmente nach dem Web-Service, den ich es so bin Parsen -

Ion.getDefault(getActivity()).configure().setLogging(getString(R.string.app_name), Log.DEBUG); 
      Ion.with(getActivity()) 
        .load("https://developers.zomato.com/api/v2.1/geocode?lat=25.12819&lon=55.22724") 
        .setHeader("user-key","my-user-key") 
        .asJsonObject() 
        .setCallback(new FutureCallback<JsonObject>() { 
         @Override 
         public void onCompleted(Exception e, JsonObject result) { 

           Log.d("FoodFragment", result.toString()); 
           RestaurantsZomato r = (RestaurantsZomato) new Gson().fromJson(result.toString(), new TypeToken<RestaurantsZomato>(){}.getType()); 
           JsonObject nearby_restaurants = result.get("nearby_restaurants").getAsJsonObject(); 
           Log.d("RestDetails",nearby_restaurants.toString()); 

           JsonObject rest = nearby_restaurants.get("1").getAsJsonObject(); 
           Log.d("RestZomato", rest.toString()); 
           JsonObject details = rest.get("restaurant").getAsJsonObject(); 
           Log.d("RestZomato", details.toString()); 
           RestaurantDetails ad = new Gson().fromJson(details, new TypeToken<RestaurantDetails>(){}.getType()); 

           Set<Map.Entry<String, JsonElement>> objects = nearby_restaurants.entrySet(); 
           for (Map.Entry<String, JsonElement> entry : objects) { 
            System.out.println(entry.getKey() + "/" + entry.getValue()); 
            if (entry.getValue() != null) { 
             RestaurantDetails rd = new Gson().fromJson(entry.getValue(), RestaurantDetails.class); 
             Log.d("simpletest",rd.getLocation().getAddress()); 
             sTrips.add(rd); 
            } 
           } 

           adapter = new RestaurantAdapter(sTrips); 
           recyclerView.setAdapter(adapter); 
         } 
        }); 
     }

wo STRIPS ist ein Objekt vom Typ RestaurantDetails. Ich bekomme eine Ausnahme in der Zeile sTrips.add (rd), da rd null ist. Aber ich kann nicht herausfinden, was ich falsch mache. Bitte helfen Sie!

Die Stacktrace ist wie folgt:

FATAL EXCEPTION: main 
java.lang.NullPointerException 
at majorproject.amity.smarttourist.fragments.FoodFragment$2.onCompleted(FoodFragment.java:161) 
at majorproject.amity.smarttourist.fragments.FoodFragment$2.onCompleted(FoodFragment.java:131) 
at com.koushikdutta.async.future.SimpleFuture.handleCallbackUnlocked(SimpleFuture.java:107) 
at com.koushikdutta.async.future.SimpleFuture.setComplete(SimpleFuture.java:141) 
at com.koushikdutta.async.future.SimpleFuture.setComplete(SimpleFuture.java:128) 
at com.koushikdutta.ion.IonRequestBuilder$1.run(IonRequestBuilder.java:246) 
at com.koushikdutta.async.AsyncServer$RunnableWrapper.run(AsyncServer.java:57) 
at android.os.Handler.handleCallback(Handler.java:730) 
at android.os.Handler.dispatchMessage(Handler.java:92) 
at android.os.Looper.loop(Looper.java:176) 
at android.app.ActivityThread.main(ActivityThread.java:5419) 
at java.lang.reflect.Method.invokeNative(Native Method) 
at java.lang.reflect.Method.invoke(Method.java:525) 
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1046) 
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:862) 
at dalvik.system.NativeStart.main(Native Method)

UPDATE Der Fehler wird die Linie Log.d ("Simple", rd.getLocation() getAddress().);

Ich habe es getestet und festgestellt, dass der Wert von RD tatsächlich null ist. Here is an image showing the debug

Quelle

2016-05-07 Vijayalakshmi Vedantham

Sie müssen Ihre Frage bearbeiten, um den StackTrace einzuschließen. Es klingt, als ob du eine NullPointerException beschreibst, aber ich bin skeptisch, weil 'rd' bei' sTrips.add (rd) 'null ist, weil nur eine Zeile bevor du dieses Objekt benutzt hast. Sie haben uns nicht gezeigt, wo 'sTrips' initialisiert wird. Sind Sie sicher, dass das Objekt nicht null ist? – trooper

@trooper Ich habe den Stacktrace und das Debug-Ergebnis hinzugefügt. bitte hilfe! –

hrm, so aus Ihrem Screenshot erscheint, dass 'rd' tatsächlich zugewiesen ist (nicht null), aber' getLocation' gibt eine Null zurück. Ich bin nicht wirklich sicher, was hier los ist - Entschuldigung, ich bin wirklich nicht viel Hilfe - aber http://StackOverflow.com/Questions/22244598/JSON-Parsing-Through-Gson-ReTurning-Null und http: // StackOverflow. com/questions/5656123/json-string-parsing-to-java-objekt-mit-mehreren-objekten sehen sehr ähnlich aus. Ich schätze, da ist etwas mit Ihrem POJO los. – trooper

Tatsächlich lesen Sie eine Werte von "1"/"2", während Sie annehmen, den Wert von restaurant innerhalb for Schleife zu lesen. Überprüfe die Antwort.

JsonObject rest = nearby_restaurants.get("1").getAsJsonObject(); 
    // Log.d("RestZomato", rest.toString()); 

    JsonObject details = rest.get("restaurant").getAsJsonObject(); 
    // Log.d("RestZomato", details.toString()); 
    RestaurantDetails ad = new Gson().fromJson(details, new TypeToken<RestaurantDetails>() {}.getType()); 

    Set<Map.Entry<String, JsonElement>> objects = nearby_restaurants.entrySet(); 

    for (Map.Entry<String, JsonElement> entry : objects) { 
     System.out.println(entry.getKey() + "/" + entry.getValue()); 
     //entry.getValue() is the value of key "1" 
     JsonObject ob=entry.getValue().getAsJsonObject(); 
     //you was reading value of "1" while you are suppose to read value of "restaurant" 

     //get value from "restaurant" object 

     if (ob != null) { 
      //RestaurantDetails is created to read value of "restaurant" 
      String restaurant=ob.get("restaurant").getAsJsonObject().toString(); 
      RestaurantDetails rd = new Gson().fromJson(restaurant, RestaurantDetails.class); 
      System.out.println("Name "+rd.name); 
      System.out.println(rd.getLocation().address); 
     } 
    }

happyCoding;

Quelle

2016-05-11 10:55:32 Bharatesh

Vielen Dank! Es hat funktioniert wie ein Zauber! :) –

Antwort

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