How to unrealize a json using GSON? Get an error

Question

The structure of the json that I have stored in a string is:

{
"0": {
        "PDate": "2019-02-25 00:00:00.0000000",
        "DDate": "2019-06-25 00:00:00.0000000",
        "Document": "FC",
        "Direction": "CALLE ...."     
     },
"1": {
        "PDate": "2019-02-25 00:00:00.0000000",
        "DDate": "2019-06-25 00:00:00.0000000",
        "Document": "FC",
        "Direction": "CALLE ...."  
     }
}

I'm using the following code, but it shows an error in the last line:

if (response.isSuccessful()){
    Object object = response.body();
    String jsonString = String.valueOf(object);
    Gson gson = new Gson();

    Type empMapType = new TypeToken<Map<Integer, Object>>() {}.getType();
    Map<Integer, Object> nameObjectJson = gson.fromJson(jsonString, empMapType);
}

The error message:

com.google.gson.JsonSyntaxException: com.google.gson.stream.MalformedJsonException: Unterminated object at line 1 column 29 path $..PostingDate

Please, I need help. Thanks

Answer 1

First - create the POJO / Model class to convert your response.

public class SomeModel{

@SerializedName("name")
@Expose
private String name = null;

public String getName() {
return name;
}

public void setName(String name) {
this.name = name;
}

}

Declare your response

 Gson gson = new Gson(); 
 SomeModelResponse response = gson.toJson(result, SomeModel.class);

If you will use Gson object more than one time - its better to create a singleton of it because every time when you create a new instance of it - it is use a lot of memory.

After add checking:

    if(response !=null && response.getName() !=null){

    if(response.getName().equalIgnoreCase("some name")){
              // show toast Result Success !!! and move to next screen
     }
    else if(response.getName().equalIgnoreCase("another name")){
     // Invalid Response !!! your logic here
    }
 }

Also don't forget to check what kind of response are you expect to get. It should not be an Object.class

Answer 2

I have noticed that error message include "$..PostingDate" but I can NOT clarify the content of "response.body()", try this:

String jsonString = String.valueOf(object);

=>

String jsonString = object.toString();

And try to print out to see what it is.

Answer 3

Create your DataModel

class Example {

    @SerializedName("PDate")
    @Expose
    private String pDate;
    @SerializedName("DDate")
    @Expose
    private String dDate;
    @SerializedName("Document")
    @Expose
    private String document;
    @SerializedName("Direction")
    @Expose
    private String direction;

    public String getPDate() {
        return pDate;
    }

    public void setPDate(String pDate) {
        this.pDate = pDate;
    }

    public String getDDate() {
        return dDate;
    }

    public void setDDate(String dDate) {
        this.dDate = dDate;
    }

    public String getDocument() {
        return document;
    }

    public void setDocument(String document) {
        this.document = document;
    }

    public String getDirection() {
        return direction;
    }

    public void setDirection(String direction) {
        this.direction = direction;
    }

}

---

Now parse it

  Gson gson = new Gson();
        String json = "{\n" +
                "\"0\": {\n" +
                "        \"PDate\": \"2019-02-25 00:00:00.0000000\",\n" +
                "        \"DDate\": \"2019-06-25 00:00:00.0000000\",\n" +
                "        \"Document\": \"FC\",\n" +
                "        \"Direction\": \"CALLE ....\"     \n" +
                "     },\n" +
                "\"1\": {\n" +
                "        \"PDate\": \"2019-02-25 00:00:00.0000000\",\n" +
                "        \"DDate\": \"2019-06-25 00:00:00.0000000\",\n" +
                "        \"Document\": \"FC\",\n" +
                "        \"Direction\": \"CALLE ....\"  \n" +
                "     }\n" +
                "}";



 Type type = new TypeToken<Map<String, Example>>(){}.getType();
 Map<String, Example> myMap = gson.fromJson(json, type);

 //Log.d("===", myMap.get("0").document);

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