Working with JsonReader

Question

I'm working on android app that should read this json string:

{
"coord":{
       "lon":145.77,
       "lat":-16.92
},
"weather":[
          {
        "id":803,
        "main":"Clouds",
        "description":"broken clouds",
        "icon":"04n"
        }
        ],
  "base":"cmc stations"
}

Something similar to this.

I can read the "coord" values successfully using the following method:

public Coordinates readCoordinates(JsonReader reader) throws IOException{
    double longitude = 0.0;     // lon
    double latitude  = 0.0;     // lat

    reader.beginObject();

    while (reader.hasNext()){
        String nameToRead = reader.nextName();
        if(nameToRead.equals("lon")){
            longitude = reader.nextDouble();
        }else if (nameToRead.equals("lat")){
            latitude = reader.nextDouble();
        }else {
            reader.skipValue();
        }
    }
    reader.endObject();
    return (new Coordinates(longitude, latitude));
}

I have a similar method for reading the "weather":

public Weather readWeather(JsonReader reader) throws IOException{
    int id = 0;
    String main         = "";
    String description  = "";
    String icon         = "";

    reader.beginObject();
    while (reader.hasNext()){
        String nameToRead = reader.nextName();
        if(nameToRead.equals("id")){
            id = reader.nextInt();
        }else if (nameToRead.equals("main")){
            main = reader.nextString();
        }else if (nameToRead.equals("description")){
            description = reader.nextString();
        }else if (nameToRead.equals("icon")){
            icon = reader.nextString();
        }else{
            reader.skipValue();
        }
    }
    reader.endObject();
    return (new Weather(id, main, description, icon));
}

I keep getting this exception message Expected BEGIN_OBJECT but was BEGIN_ARRAY

If I change reader.beginObject() to reader.beginArray() I get the same error. I also tried removing it entirely, and the same error occurred.

I'm assuming this is caused by the introduction of the [, but I'm not really sure how to fix this. If anyone has a clue please help, I would really appreciate it, thank you.

Answer 1

you are not getting the structure of JSON. after "weather" there array which have only one object. so your code should be

 jsonReader.beginArray();

                while( jsonReader.hasNext() ) {

                    jsonReader.beginObject();

                    while( jsonReader.hasNext() ) {

                       String nameToRead = reader.nextName();
    if(nameToRead.equals("id")){
        id = reader.nextInt();
    }else if (nameToRead.equals("main")){
        main = reader.nextString();
    }else if (nameToRead.equals("description")){
        description = reader.nextString();
    }else if (nameToRead.equals("icon")){
        icon = reader.nextString();
                        else {

                            jsonReader.skipValue();

                        }