如何顯示列表視圖中的JSON數據與改造2

Question

我想做的事：填充列表視圖與站名稱，我將從API檢索json形式。

問題：我在使用站名填充列表視圖時遇到問題，不確定要採取的步驟。當我按下按鈕時，什麼都沒有發生。任何推動到正確的方向將不勝感激。以下是我的代碼到目前爲止。

我站模型

public class Station { 
    @SerializedName("id") 
    int mStationId; 
    @SerializedName("name") 
    String mStationName; 
    @SerializedName("lat") 
    double mStationLat; 
    @SerializedName("long") 
    double mStationLong; 

public Station(int mStationId, String mStationName, double mStationLat, double mStationLong) { 
    this.mStationId = mStationId; 
    this.mStationName = mStationName; 
    this.mStationLat = mStationLat; 
    this.mStationLong = mStationLong; 
} 
} 

我ServiceGenerator

public class ServiceGenerator { 

public static final String API_BASE_URL = "http://keantrolley.bbapi.co/stations/"; 

private static OkHttpClient httpClient = new OkHttpClient(); 
private static Retrofit.Builder builder = 
     new Retrofit.Builder() 
       .baseUrl(API_BASE_URL) 
       .addConverterFactory(GsonConverterFactory.create()); 

public static <S> S createService(Class<S> serviceClass) { 
    Retrofit retrofit = builder.client(httpClient).build(); 
    return retrofit.create(serviceClass); 
} 
} 

然後我的界面

public interface StationClient { 
@GET("station") 
Call<List<Station>> listStations(); 
} 

我的MainActivity

public class MainActivity extends AppCompatActivity { 

private ListView stationsListView; 
private ArrayAdapter<Station> stationListAdapter; 

@Override 
protected void onCreate(Bundle savedInstanceState) { 
    super.onCreate(savedInstanceState); 
    setContentView(R.layout.activity_main); 

    stationsListView = (ListView) findViewById(android.R.id.list); 

    stationListAdapter = new ArrayAdapter<>(this, android.R.layout.simple_list_item_1, new LinkedList<Station>()); 
    stationsListView.setAdapter(stationListAdapter); 
} 

public void getStations(View view) { 
    stationListAdapter.clear(); 
    stationListAdapter.notifyDataSetChanged(); 

    StationClient stationClient = ServiceGenerator.createService(StationClient.class); 
    Call<List<Station>> call = stationClient.listStations(); 
    call.enqueue(new Callback<List<Station>>() { 
     @Override 
     public void onResponse(Response<List<Station>> response, Retrofit retrofit) { 
      if (response.isSuccess()) { 
       stationListAdapter.addAll(); //Here is where i believe is the root of the problem 
      } else { 
       stationListAdapter.addAll(); 
      } 
     } 

     @Override 
     public void onFailure(Throwable t) { 
      Log.d("Error", t.getMessage()); 
     } 
    }); 
} 

} 

Answer 1

爲了讓您的列表，你必須調用response.body()：

StationClient stationClient = ServiceGenerator.createService(StationClient.class); 
    Call<List<Station>> call = stationClient.listStations(); 
    call.enqueue(new Callback<List<Station>>() { 
     @Override 
     public void onResponse(Response<List<Station>> response, Retrofit retrofit) { 
      if (response.isSuccess()) { 
       stationListAdapter.addAll(response.body()); //Here is where i believe is the root of the problem 
      } else { 
       //Here is when the status code isn't 2XX (200,201,etc) 
      } 
     } 

     @Override 
     public void onFailure(Throwable t) { 
      Log.d("Error", t.getMessage()); 
     } 
    }); 

UPDATE

作秀如何正確在列表視圖的站名：

ArrayAdapter<Station> adapter = new ArrayAdapter<Station>(this, 
      android.R.layout.simple_list_item_1     
      , new LinkedList<Station>()) { 

     @Override 
     public View getView(int position, View convertView, ViewGroup parent) { 

      ((TextView) convertView).setText(getItem(position).mStationName); 
      return convertView; 
     }    
    };