Gson重建反序列化对象时丢失数据

Question

I don't really know how to word the title of this question, so if anyone has a better title please suggest it. I am trying to encode/decode an ArrayList of Sessions s and each session has an ArrayList of Shot s. The problem I am having is that when I try to encode the list of Sessions, Gson doesn't dig into the array of Shots for each session and encode the ArrayList of shots, but just leaves an empty array:

[  
   {  
      "ANGLE":71.356865,
      "DATE":"2015-11-25-11-02",
      "KEY":62,
      "SHOTS":[  

      ]
   },
   {  
      "ANGLE":75.26292,
      "DATE":"2015-11-25-11-02",
      "KEY":63,
      "SHOTS":[  

      ]
   }
]

Sessions Class

import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Session {
    @SerializedName("SHOTS") @Expose
    public ArrayList<Shot> shots;
    @SerializedName("SCORE") @Expose
    public float averageScore;
    @SerializedName("DATE") @Expose
    public String date;
    @SerializedName("KEY") @Expose
    public int pk;
    ...
}

Shots class

import com.google.gson.annotations.Expose;
import com.google.gson.annotations.SerializedName;
public class Shot {
    public String identifier;
    @SerializedName("SCORE") @Expose
    public double score;
    @SerializedName("TYPE") @Expose
    public int problem;
    @SerializedName("PROBLEM_STRING") @Expose
    public String problemString;
    ...
}

Building the json string:

Gson gson = new GsonBuilder().excludeFieldsWithoutExposeAnnotation().create();
String json = gson.toJson(sessions);

update

After looking into this more, data is being lossed when I am rebuilding the object and not when I am serializing it. This is the code I am using to deserialize it:

Gson gson = new Gson();
Type type = new TypeToken<ArrayList<Session>>(){}.getType();
sessions = gson.fromJson(sessionsString, type);

update

After even more digging, my data loss is not related to the encoding/deconging of Gson . I would like to apologize to Google for blaming them. My problem seems to be related to AsyncTask and I have reposted it here .

Answer 1

First are you sure of the name ? Second the only array I see is the score

 "SCORE":[  

  ]

please recheck the json object or update it with actual data