Parsing a JSON Response into a Java object

Question

I am new to Android development. I have a node test server running that returns the following json post response

res.json({ userName: 'test@gmail.com', ratedOn: new Date(), rating: Math.ceil(Math.random() * 5) });

I am using gson to parse the response into an object Class Definition of the target class

public class RateWork {
    public int rating;
    public Date ratedOn;
    public String userName;

    public RateWork(int rating, Date ratedOn, String userName){
        this.rating = rating;
        this.ratedOn = ratedOn;
        this.userName = userName;
    }
}

In the client(Android side) i am using volley to capture the response.

StringRequest jsonObjReq = new StringRequest(Request.Method.POST, Constants.API_POST_RATING,                                    

new Response.Listener<String>() {    
    @Override
    public void onResponse(String response) {
        Log.d("TEST", response);
        RateWork rw = gson.fromJson(response, RateWork.class);
    }
}, new Response.ErrorListener() {

    @Override
    public void onErrorResponse(VolleyError error) {
        Log.d("TEST", "Error: " + error.getMessage());
    }
}

Log of the response

D/TEST: {"userName":"test@gmail.com","ratedOn":"Sat Dec 09 14:10:49 GMT+05:30 2017","rating":3}

I get an exception at this line -> com.google.gson.JsonSyntaxException

RateWork rw = gson.fromJson(response, RateWork.class);

Please help fix the error.

Missing: 1. full exception description and trace. 2. The debug string value of 'response' — Yoav Gur, Dec 09 '17 at 14:30
If I had to guess, Gson doesn't know how to parse your Date string into a Date object. — OneCricketeer, Dec 09 '17 at 15:33
I have read all the answers. I couldnt find any that uses GSON. — Navaneeth, Dec 09 '17 at 15:33
Anyways, one line of your exception doesn't tell us what the error is. Please edit your question to include the full stacktrace — OneCricketeer, Dec 09 '17 at 15:35
removing the date property got the parsing to work. Let me figure out how to work out with the date. Thanks — Navaneeth, Dec 09 '17 at 15:42
Got it working by using -> gson = new GsonBuilder().setDateFormat("yyyy-MM-dd'T'HH:mm:ss").create(); — Navaneeth, Dec 09 '17 at 15:52

score 0 · Answer 1 · answered Dec 09 '17 at 15:42

0

Use this to create your Gson Object

Gson gson = new GsonBuilder()
   .setDateFormat("EEE, dd MMM yyyy HH:mm:ss zzz").create();

refer this for more detail

answered Dec 09 '17 at 15:42

Gautam Chibde

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At least use the correct format for the date in the question instead of copying a post – OneCricketeer Dec 09 '17 at 15:45
thanks for your help Gautam, i can take it forward with this using the required format. – Navaneeth Dec 09 '17 at 15:54

Parsing a JSON Response into a Java object

1 Answers1