不会显示在提取的JSON的卡片视图/回收站视图

我一直在试图显示从RecyclerView中的API后端获取的JSON数据，虽然似乎无法显示它没有错误，只是不会出现虽然后端通知操作已经成功不会显示在提取的JSON的卡片视图/回收站视图

MapAndList.java

 private void loadJSON() { 
      Log.d("sample","Help"); 
      Retrofit retrofit = new Retrofit.Builder() 
        .baseUrl(Constants.BASE_URL) 
        .addConverterFactory(GsonConverterFactory.create()) 
        .build(); 
      RequestInterfaceList request = retrofit.create(RequestInterfaceList.class); 
      Call<JSONResponse> call = request.getJSON(); 
      call.enqueue(new Callback<JSONResponse>() { 
       @Override 
       public void onResponse(Call<JSONResponse> call, Response<JSONResponse> response) { 
        Log.d("sample","success to"); 
        JSONResponse jsonResponse = response.body(); 
        mArrayList = new ArrayList<>(Arrays.asList(jsonResponse.getAndroid())); 
        mAdapter = new DataAdapter(mArrayList); 
        mRecyclerView.setAdapter(mAdapter); 
       } 

       @Override 
       public void onFailure(Call<JSONResponse> call, Throwable t) { 
        Log.d("sample","failure"); 
        Log.d("Error", t.getMessage()); 
       } 
      }); 

     }

LocationData.java

package com.floodwatchv1.knightdev.floodwatchv1.Retrofit; 

import com.google.gson.annotations.Expose; 
import com.google.gson.annotations.SerializedName; 

/** 
* Created by knightdev on 5/24/17. 
*/ 
public class LocationData { 

    @SerializedName("id") 
    @Expose 
    private Integer id; 
    @SerializedName("name") 
    @Expose 
    private String name; 
    @SerializedName("zip") 
    @Expose 
    private String zip; 
    @SerializedName("latitude") 
    @Expose 
    private Double latitude; 
    @SerializedName("longitude") 
    @Expose 
    private Double longitude; 
    @SerializedName("device") 
    @Expose 
    private Device device; 

    public Integer getId() { 
     return id; 
    } 

    public void setId(Integer id) { 
     this.id = id; 
    } 

    public String getName() { 
     return name; 
    } 

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

    public String getZip() { 
     return zip; 
    } 

    public void setZip(String zip) { 
     this.zip = zip; 
    } 

    public Double getLatitude() { 
     return latitude; 
    } 

    public void setLatitude(Double latitude) { 
     this.latitude = latitude; 
    } 

    public Double getLongitude() { 
     return longitude; 
    } 

    public void setLongitude(Double longitude) { 
     this.longitude = longitude; 
    } 

    public Device getDevice() { 
     return device; 
    } 

    public void setDevice(Device device) { 
     this.device = device; 
    } 
}

Level.java

package com.floodwatchv1.knightdev.floodwatchv1.Retrofit; 

import com.google.gson.annotations.Expose; 
import com.google.gson.annotations.SerializedName; 

public class Level { 

    @SerializedName("id") 
    @Expose 
    private Integer id; 
    @SerializedName("device_id") 
    @Expose 
    private Integer deviceId; 
    @SerializedName("height") 
    @Expose 
    private Integer height; 
    @SerializedName("status") 
    @Expose 
    private String status; 
    @SerializedName("notify") 
    @Expose 
    private Boolean notify; 
    @SerializedName("created_at") 
    @Expose 
    private String createdAt; 
    @SerializedName("updated_at") 
    @Expose 
    private String updatedAt; 

    public Integer getId() { 
     return id; 
    } 

    public void setId(Integer id) { 
     this.id = id; 
    } 

    public Integer getDeviceId() { 
     return deviceId; 
    } 

    public void setDeviceId(Integer deviceId) { 
     this.deviceId = deviceId; 
    } 

    public Integer getHeight() { 
     return height; 
    } 

    public void setHeight(Integer height) { 
     this.height = height; 
    } 

    public String getStatus() { 
     return status; 
    } 

    public void setStatus(String status) { 
     this.status = status; 
    } 

    public Boolean getNotify() { 
     return notify; 
    } 

    public void setNotify(Boolean notify) { 
     this.notify = notify; 
    } 

    public String getCreatedAt() { 
     return createdAt; 
    } 

    public void setCreatedAt(String createdAt) { 
     this.createdAt = createdAt; 
    } 

    public String getUpdatedAt() { 
     return updatedAt; 
    } 

    public void setUpdatedAt(String updatedAt) { 
     this.updatedAt = updatedAt; 
    } 

}

Device.java

package com.floodwatchv1.knightdev.floodwatchv1.Retrofit; 

import com.google.gson.annotations.Expose; 
import com.google.gson.annotations.SerializedName; 

public class Device { 

    @SerializedName("id") 
    @Expose 
    private Integer id; 
    @SerializedName("name") 
    @Expose 
    private String name; 
    @SerializedName("level") 
    @Expose 
    private Level level; 

    public Integer getId() { 
     return id; 
    } 

    public void setId(Integer id) { 
     this.id = id; 
    } 

    public String getName() { 
     return name; 
    } 

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

    public Level getLevel() { 
     return level; 
    } 

    public void setLevel(Level level) { 
     this.level = level; 
    } 

}

JSONResponse.java

package com.floodwatchv1.knightdev.floodwatchv1.Retrofit; 

/** 
* Created by knightdev on 5/24/17. 
*/ 

public class JSONResponse { 
    private LocationData[] android; 

    public LocationData[] getAndroid() { 
     return android; 
    } 
}

RequestInterfaceList.java

package com.floodwatchv1.knightdev.floodwatchv1.Retrofit; 

import java.util.List; 

import retrofit2.Call; 
import retrofit2.http.GET; 

/** 
* Created by knightdev on 5/24/17. 
*/ 

public interface RequestInterfaceList { 

    @GET("api/water_level") 
    Call<JSONResponse> getJSON(); 

}

DataAdapter.java

package com.floodwatchv1.knightdev.floodwatchv1.Retrofit; 

/** 
* Created by knightdev on 5/24/17. 
*/ 

import android.support.v7.widget.RecyclerView; 
import android.view.LayoutInflater; 
import android.view.View; 
import android.view.ViewGroup; 
import android.widget.Filter; 
import android.widget.Filterable; 
import android.widget.TextView; 

import com.floodwatchv1.knightdev.floodwatchv1.R; 

import java.util.ArrayList; 

public class DataAdapter extends RecyclerView.Adapter<DataAdapter.ViewHolder> implements Filterable{ 
    private ArrayList<LocationData> mArrayList; 
    private ArrayList<LocationData> mFilteredList; 

    public DataAdapter(ArrayList<LocationData> arrayList) { 
     mArrayList = arrayList; 
     mFilteredList = arrayList; 
    } 

    @Override 
    public DataAdapter.ViewHolder onCreateViewHolder(ViewGroup viewGroup, int i) { 
     View view = LayoutInflater.from(viewGroup.getContext()).inflate(R.layout.card_row, viewGroup, false); 
     return new ViewHolder(view); 
    } 

    @Override 
    public void onBindViewHolder(DataAdapter.ViewHolder viewHolder, int i) { 
     viewHolder.tv_name.setText(mFilteredList.get(i).getName()); 
     viewHolder.tv_version.setText(mFilteredList.get(i).getLatitude().toString()); 
     viewHolder.tv_api_level.setText(mFilteredList.get(i).getLongitude().toString()); 
    } 

    @Override 
    public int getItemCount() { 
     return mFilteredList.size(); 
    } 

    public class ViewHolder extends RecyclerView.ViewHolder{ 
     private TextView tv_name,tv_version,tv_api_level; 
     public ViewHolder(View view) { 
      super(view); 

      tv_name = (TextView)view.findViewById(R.id.tv_name); 
      tv_version = (TextView)view.findViewById(R.id.tv_version); 
      tv_api_level = (TextView)view.findViewById(R.id.tv_api_level); 

     } 
    } 

    @Override 
    public Filter getFilter() { 

     return new Filter() { 
      @Override 
      protected FilterResults performFiltering(CharSequence charSequence) { 

       String charString = charSequence.toString(); 

       if (charString.isEmpty()) { 

        mFilteredList = mArrayList; 
       } else { 

        ArrayList<LocationData> filteredList = new ArrayList<>(); 

        for (LocationData androidVersion : mArrayList) { 

         if (androidVersion.getName().toLowerCase().contains(charString) || androidVersion.getLongitude().toString().contains(charString) || androidVersion.getLatitude().toString().toLowerCase().contains(charString)) { 

          filteredList.add(androidVersion); 
         } 
        } 

        mFilteredList = filteredList; 
       } 

       FilterResults filterResults = new FilterResults(); 
       filterResults.values = mFilteredList; 
       return filterResults; 
      } 

      @Override 
      protected void publishResults(CharSequence charSequence, FilterResults filterResults) { 
       mFilteredList = (ArrayList<LocationData>) filterResults.values; 
       notifyDataSetChanged(); 
      } 
     }; 
    } 

}

而且回JSON的结构是这样的：

[ 
{ 
    "id": 1, 
    "name": "Parang, Marikina", 
    "zip": "1900", 
    "latitude": 14.66, 
    "longitude": 121.113, 
    "device": { 
    "id": 1, 
    "name": "ARD_0001", 
    "level": { 
     "id": 1, 
     "device_id": 1, 
     "height": 5, 
     "status": "MONITOR", 
     "notify": true, 
     "created_at": "2017-05-24T08:01:08.000Z", 
     "updated_at": "2017-05-24T08:01:08.000Z" 
    } 
    } 
}, 
{ 
    "id": 2, 
    "name": "Fortune, Marikina", 
    "zip": "1901", 
    "latitude": 14.6589, 
    "longitude": 121.128, 
    "device": { 
    "id": 2, 
    "name": "ARD_0002", 
    "level": { 
     "id": 2, 
     "device_id": 2, 
     "height": 21, 
     "status": "EVACUATE", 
     "notify": true, 
     "created_at": "2017-05-26T03:16:49.000Z", 
     "updated_at": "2017-06-07T03:30:07.000Z" 
    } 
    } 
}, 
{ 
    "id": 3, 
    "name": "San Jose del Monte, Bulacan", 
    "zip": "", 
    "latitude": 14.8206, 
    "longitude": 121.102, 
    "device": { 
    "id": 3, 
    "name": "ARD_0003", 
    "level": { 
     "id": 3, 
     "device_id": 3, 
     "height": 16.3, 
     "status": "EVACUATE", 
     "notify": true, 
     "created_at": "2017-06-02T04:46:35.000Z", 
     "updated_at": "2017-06-02T05:10:38.000Z" 
    } 
    } 
}, 
{ 
    "id": 4, 
    "name": "Mambugan, Antipolo", 
    "zip": "", 
    "latitude": 14.6176, 
    "longitude": 121.138, 
    "device": { 
    "id": 4, 
    "name": "ARD_0004", 
    "level": { 
     "id": 4, 
     "device_id": 4, 
     "height": 16.3, 
     "status": "EVACUATE", 
     "notify": true, 
     "created_at": "2017-06-05T02:16:53.000Z", 
     "updated_at": "2017-06-05T02:16:53.000Z" 
    } 
    } 
}, 
{ 
    "id": 5, 
    "name": "Malolos,Bulacan", 
    "zip": "", 
    "latitude": 14.8527, 
    "longitude": 120.816, 
    "device": { 
    "id": 5, 
    "name": "ARD_0005", 
    "level": { 
     "id": 5, 
     "device_id": 5, 
     "height": 15, 
     "status": "EVACUATE", 
     "notify": true, 
     "created_at": "2017-06-06T06:35:27.000Z", 
     "updated_at": "2017-06-07T03:29:47.000Z" 
    } 
    } 
} 
]

来源

2017-06-14 knightdev

“似乎无法显示它” - 不是很好的解释。什么是实际问题？ – Yupi

虽然没有错误，但已被提取的数据似乎无法显示在回收站视图中 – knightdev

如果您检查数据加载正确并且您在'onCreate'中调用'loadJSON（）'，那么问题可能在于你的xml代码。也许另一种观点是占用'recyclerView'的空间，你不会看到异常，但'recyclerView'将不可见。 – Yupi

最好是在loadJSON（过滤数组列表）本身，然后设置数据适配器，而不是适配器过滤。

来源

2017-06-14 05:45:25 Dhanumjay

不会显示在提取的JSON的卡片视图/回收站视图

回答

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