Android Volley 将 JSONArray 转换为 ArrayList<MyObject>

Question

我有 JsonObject

JSON Object

我有返回 JSONArray 的方法。我想传递第一个字段并只获取数据数组。然后将其投射到我的数组列表中。我真的很感谢你的任何建议。

  void getUsersBeacons(){
    type = new TypeToken<List<Beacon>>(){}.getType();
    JSONArray myReq = new JSONArray(Request.Method.GET, Url + testId + Url2, new Response.Listener<JSONArray>() {
        @Override
        public void onResponse(JSONArray response) {
            try{
            JSONArray buffArray = response.getJSONArray(2);
               JSONArray bufJsonArray = response.getJSONArray(1);
                beaconsList = converter.fromJson(bufJsonArray.toString(), type);
            }catch (Exception e){
                e.printStackTrace();
            }
        }


    });
    VolleySingleton.getInstance(getActivity().getApplicationContext()).addToRequestQueue(myReq);
}

信标类：

public class Beacon {

private Object idBeacon;
private String friendlyName;
private String imageUrl;

public Beacon(Object idBeacon, String friendlyName, String imageUrl) {
    this.idBeacon = idBeacon;
    this.friendlyName = friendlyName;
    this.imageUrl = imageUrl;
}

public Object getIdBeacon() {
    return idBeacon;
}

public void setIdBeacon(Object idBeacon) {
    this.idBeacon = idBeacon;
}

public String getFriendlyName() {
    return friendlyName;
}

public void setFriendlyName(String friendlyName) {
    this.friendlyName = friendlyName;
}

public String getImageUrl() {
    return imageUrl;
}

public void setImageUrl(String imageUrl) {
    this.imageUrl = imageUrl;
}

}

Answer 1

如果我理解正确，你最好传入 JSONArray 而不是字符串并解析它的内容，如下所示：

public static List<Beacon> fromJson(JSONArray array)
{
  ArrayList<Beacon> res = new ArrayList<>();
  for (int i = 0; i < array.length(); ++i)
  {
    JSONObject beacon = array.getJSONObject(i);
    res.add(new Beacon(beacon.getInt("beaconId"), beacon.getString("name"), beacon.getString("imageUrl"))));
  }

  return res;
}

UPD：在回复您的评论时，您必须使用Response.Listener<JSONObject> 而不是Response.Listener<JSONArray>，然后执行以下操作：

public void onResponse(JSONObject response)
{
  JSONArray array = response.getJSONArray("data");
  converter.fromJson(array);
}