Android JSon error "Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2"

Question

I am getting JSon data from a web service, the sample data is given below:

[
  {
    "SectionId": 1,
    "SectionName": "Android"
  }
]

When i try to convert it, it throws an error, i am doing it as:

Data data = new Gson().fromJson(jsonDataFromWebService, Data.class);

My Section Class is:

class Section
{
    public int SectionId;
    public String SectionName;
}

class Data {
    public List<Section> sections;
}

The LogCat says:

com.google.gson.JsonSyntaxException: java.lang.IllegalStateException: Expected BEGIN_OBJECT but was BEGIN_ARRAY at line 1 column 2

Answer 1

The error explains whats wrong... u r returning an array and not a JSon object

try as following:

JSONArray ja = new JSONArray(jsonStringReturnedByService);

Data sections = new Data();

for (int i = 0; i < ja.length(); i++) {
    Section s = new Section();
    JSONObject jsonSection = ja.getJSONObject(i);

    s.SectionId = Integer.ValueOf(jsonSection.getString("SectionId"));
    s.SectionName = jsonSection.getString("SectionName");

   //add it to sections list
   sections.add(s);
}

return sections;