retrofitを使用してJSONレスポンスを解析する方法

Question

JSON配列とJSON要素の2つを解析する必要があります。 retrofitを使用してJSON要素を解析する方法

JSON Responce例：ここでは

{ 
    "trip_id": "trip101", 
    "itinerary": [ 
    { 
     "day": 1, 
     "name": "Arrive Srinagar 5200ft" 
    }, 
    { 
     "day": 2, 
     "name": "Proceed for Gulmarg 8530ft. (App. 60 Kms/2 Hrs)" 
    }, 
    { 
     "day": 3, 
     "name": "Proceed to pahalgam on 5700ft. (App. 140 Kms/5 Hrs)" 
    }, 
    { 
     "day": 4, 
     "name": "Free for local Sight seens" 
    }, 
    { 
     "day": 5, 
     "name": "Proceed for Srinagar (App. 97 Kms/3 Hrs)" 
    }, 
    { 
     "day": 6, 
     "name": "Proceed for Day trip to Sonamarg 9200ft.(App. 87 Kms/3 Hrs)" 
    }, 
    { 
     "day": 7, 
     "name": "Srinagar Air port Droping" 
    } 
    ] 
} 

は、私のPOJOクラスです：

public class MyPojo{ 

    private String trip_id; 

    private Itinerary[] itinerary; 

    public String getTrip_id() 
    { 
     return trip_id; 
    } 

    public void setTrip_id (String trip_id) 
    { 
     this.trip_id = trip_id; 
    } 

    public Itinerary[] getItinerary() 
    { 
     return itinerary; 
    } 

    public void setItinerary (Itinerary[] itinerary) 
    { 
     this.itinerary = itinerary; 
    } 

    @Override 
    public String toString() 
    { 
     return "ClassPojo [trip_id = "+trip_id+", itinerary = "+itinerary+"]"; 
    } 
} 

別のクラス：

public class Itinerary{ 
    private String name; 

    private String day; 

    public String getName() { 
     return name; 
    } 

    public void setName (String name) { 

     this.name = name; 
    } 

    public String getDay() { 
     return day; 
    } 

    public void setDay (String day) { 

     this.day = day; 
    } 

    @Override 
    public String toString() 
    { 
     return "ClassPojo [name = "+name+", day = "+day+"]"; 
    } 
} 

アダプタ：

public class DayAdapter extends ArrayAdapter<Itinerary> { 

     private Context context; 
     private List<Itinerary> days; 


     public DayAdapter(Context context, int resource, List<Itinerary> objects) { 
      super(context, resource, objects); 
      this.context = context; 
      this.days = objects; 
     } 
    @Override 
    public View getView(int position, View convertView, ViewGroup parent) { 
     LayoutInflater inflater = (LayoutInflater) context.getSystemService(Activity.LAYOUT_INFLATER_SERVICE); 
     View view = inflater.inflate(R.layout.item_day, parent, false); 

     Itinerary itinerary = days.get(position); 

     TextView tvDay = (TextView)view.findViewById(R.id.tv_day); 
     TextView tvName = (TextView)view.findViewById(R.id.tv_name); 

     tvDay.setText(itinerary.getDay()); 
     tvName.setText(itinerary.getName()); 

     return view; 
    } 
} 

MainActivity：

public class MainActivity extends AppCompatActivity { 

    public static final String ROOT_URL = "http://demo8000805.mockable.io/v1/"; 
    private ListView lvDays; 
    List<Itinerary> days; 
    String id; 

    @Override 
    protected void onCreate(Bundle savedInstanceState) { 
     super.onCreate(savedInstanceState); 
     setContentView(R.layout.activity_main); 
     Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar); 
     setSupportActionBar(toolbar); 

     lvDays = (ListView) findViewById(R.id.lv_days); 


     //final ProgressDialog loading = ProgressDialog.show(this, "Fetching Data", "Please wait...", false, false); 

     RestAdapter adapter = new RestAdapter.Builder().setEndpoint(ROOT_URL).build(); 

     DayAPI api = adapter.create(DayAPI.class); 

     api.getDays(new Callback<List<Itinerary>>() { 
      @Override 
      public void success(List<Itinerary> itineraries, Response response) { 
       //loading.dismiss(); 
       days = itineraries; 
       DayAdapter dayadapter = new DayAdapter(getApplicationContext(),R.layout.item_day,days); 
       lvDays.setAdapter(dayadapter); 
      } 

      @Override 
      public void failure(RetrofitError error) { 
       //tvName.setText(error.getMessage()); 
       Toast.makeText(getApplicationContext(),"Failed", Toast.LENGTH_LONG).show(); 
      } 
     }); 
    } 

どのように私はこのコードを使用してJSONレスポンスを解析することができますか？

Answer 1

あなたのコールバックの成功結果は、旅程の配列を含んでいない旅程の配列ではありません。

あなたのコールバックがそのようにする必要があります

api.getDays(new Callback<ItineraryResponse>() { 
    @Override 
    public void success(ItineraryResponse itineraryResponse, Response response) { 
     for(Itinerary itinerary : itineraryResponse.getItinerary()){ 
      Log.e("Name", itinerary.getName()); 
     } 
    } 

    @Override 
    public void failure(RetrofitError error) { 
     //tvName.setText(error.getMessage()); 
     Toast.makeText(getApplicationContext(),"Failed", Toast.LENGTH_LONG).show(); 
    } 
}); 

その後、あなたのモデルItineraryResponseはSerializableを実装する必要があります。

public class ItineraryResponse implements Serializable{ 

    private ArrayList<Itinerary> itinerary; 

    public ArrayList<Itinerary> getItinerary() { 
     return itinerary; 
    } 

    public void setItinerary(ArrayList<Itinerary> itinerary) { 
     this.itinerary = itinerary; 
    } 
} 

そして最後に、あなたのモデルの旅程を：

public class Itinerary implements Serializable{ 

    private String name; 

    public String getName() { 
     return name; 
    } 

    public void setName(String name) { 
     this.name = name; 
    } 
}