Question

我正在尝试使用改装2.1.0解析下一个json对象，但我不知道为什么字段数据中没有任何数据它始终为空。

{
  "status": "OK",
  "message": "Upload succesfull",
  "data": [
    {
      "channel": "madrid",
      "date": "20161212221",
      "metadata": {
        "id": "tvmadrid",
        "channel_id": "tvmadrid.com",
        "channel_name": "mad",        
      },
      "promos": []
    },
    {
      "channel": "barca",
      "date": "20161233232",
      "metadata": {
        "id": "tvbarca",
        "channel_id": "tvbarca.com",
        "channel_name": "barca",  
      },
      "promos": []
    }
  ]
}

我的模特课就在这里。

TvChannel

public class TvChannel {
private String status;
private String message;
private Data[] data;

public String getStatus() {
    return status;
}

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

public String getMessage() {
    return message;
}

public void setMessage(String message) {
    this.message = message;
}



public Data[] getData() {
    return data;
}

public void setData(Data[] data) {
    this.data = data;
}


@Override
public String toString() {
    return    "status " + status + "\n"
            + "message " + message + "\n"
            + "Data " + data.toString();
}

}

这是一个调用API的方法

public void getTvChannel(User user, MultipartBody.Part body) {

    //user.getData().getAutenticate(),

    Call<TvChannel> callTvChannel = getAPI().listTvChannel(user.getData().getAutenticate(), body);
    callTvChannel.enqueue(new Callback<TvChannel>() {
        @Override
        public void onResponse(Call<TvChannel> call, Response<TvChannel> response) {
            if (response.isSuccessful()) {




                Log.d(TAG, "body to string: " + response.body().getStatus());

                TvChannel tvChannel = response.body();



                ArrayList<Data> datas = new ArrayList<Data>(Arrays.asList(response.body().getData()));

                Log.d(TAG + " getTvChannel ", " onResponse: status: " + tvChannel.getStatus() + "  message: " + tvChannel.getMessage() );

                for (Data data : datas) {
                    Log.d(TAG,data.toString());
                }

            } else {
                Log.d(TAG + " getTvChannel", " onResponse " + "Error Code " + response.code());
            }
        }

        @Override
        public void onFailure(Call<TvChannel> call, Throwable t) {
            Log.d(TAG + " getTvChannel ", " onFailure " + " Didn't work " + t.getMessage() + " " + t.getCause() + " \n" + Arrays.toString(t.getStackTrace()));


        }
    });
}

提前感谢。

Answer 1

您不需要关注....只需致电tvChannel.getData()

ArrayList<Data> datas = new ArrayList<Data>(Arrays.asList(response.body().getData()));

Answer 2

将数组替换为List，如下所示：

@SerializedName("data")
private List<Data> data;

public List<Data> getData() {
    return data;
}

public void setData(List<Data> data) {
    this.data = data;
}

Answer 3

试试这个

1）模型类的变化 Data[] data至ArrayList<Data>

2）获取“数据”，如

List<Data> datas=tvChannel.getData();

我希望它有效。

Answer 4

问题出在你的json，请把json放到jsonlint.com

package com.example;

import java.util.List;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

public class Datum {

@SerializedName("channel")
@Expose
private String channel;
@SerializedName("date")
@Expose
private String date;
@SerializedName("metadata")
@Expose
private Metadata metadata;
@SerializedName("promos")
@Expose
private List<Object> promos = null;

public String getChannel() {
return channel;
}

public void setChannel(String channel) {
this.channel = channel;
}

public String getDate() {
return date;
}

public void setDate(String date) {
this.date = date;
}

public Metadata getMetadata() {
return metadata;
}

public void setMetadata(Metadata metadata) {
this.metadata = metadata;
}

public List<Object> getPromos() {
return promos;
}

public void setPromos(List<Object> promos) {
this.promos = promos;
}

}
-----------------------------------com.example.Example.java-----------------------------------

package com.example;

import java.util.List;
import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;

public class Example {

@SerializedName("status")
@Expose
private String status;
@SerializedName("message")
@Expose
private String message;
@SerializedName("data")
@Expose
private List<Datum> data = null;

public String getStatus() {
return status;
}

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

public String getMessage() {
return message;
}

public void setMessage(String message) {
this.message = message;
}

public List<Datum> getData() {
return data;
}

public void setData(List<Datum> data) {
this.data = data;
}

}
-----------------------------------com.example.Metadata.java-----------------------------------

package com.example;

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

public class Metadata {

@SerializedName("id")
@Expose
private String id;
@SerializedName("channel_id")
@Expose
private String channelId;
@SerializedName("channel_name")
@Expose
private String channelName;

public String getId() {
return id;
}

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

public String getChannelId() {
return channelId;
}

public void setChannelId(String channelId) {
this.channelId = channelId;
}

public String getChannelName() {
return channelName;
}

public void setChannelName(String channelName) {
this.channelName = channelName;
}

}

Answer 5

尝试使用自定义数据类复杂化您的模型，而不是使用数据导入（顺便说一下，您导入了哪些数据类？）：

public class TvChannel {
private String status;
private String message;
ArrayList<Data> data;
...
}
public class Data 
{
    String channel;
    int date;
    Metadata metadata;
    String[] promos;//of course, if that's string array
}

public class Metadata
{
    String id;
    String channel_id;
    String channel_name;
}

你可以得到这样的数据：

TvChannel tvChannel = response.body();
String metadataId = tvChannel.data.get(index).metadata.id;

Answer 6

尝试一下，希望对您有所帮助。

import Vue from 'vue'
import Vuex from 'vuex'
import * as user from './modules/user.js'
import * as auth from './modules/auth.js'
import * as group from './modules/group'
import * as system from './modules/system'
import * as module from './modules/module'

使用数组改进

6 个答案: