将不会显示已获取的JSON的卡片视图/回收站视图

Question

我一直在尝试显示从RecyclerView中的API后端获取的JSON数据，虽然似乎无法显示它但是没有出现错误，虽然后端通知操作已成功但不会出现

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();
            }
        };
    }

}

返回JSON的结构如下：

[
 {
   "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"
     }
   }
 }
]

Answer 1

最好在loadJSON（）本身中过滤arraylist，然后将数据设置为适配器，而不是在适配器中过滤。