JSON array from Django to Android

I'm having trouble trying to parse a json array string sent from Django to an Android. This is the format of the json string.

[
    {
        "pk": 1,
        "model": "brete.brete",
        "fields": {
            "contenido": "93iw09if",
            "fecha": "2011-05-07 03:06:40",
            "codigo_confirmacion": "",
            "correo": "[email protected]",
            "activado": false,
            "titulo": "234"
        }
    },
    {
        "pk": 2,
        "model": "brete.brete",
        "fields": {
            "contenido": "asoidjfdiso",
            "fecha": "2011-05-07 03:08:09",
            "codigo_confirmacion": "",
            "correo": "[email protected]",
            "activado": false,
            "titulo": "ijj"
        }
    }
]
etc

This is how I'm grabbing the data:

        //parse json data
        try{
            JSONArray jArray = new JSONArray(result);
            for(int i=0;i<jArray.length();i++){
                JSONObject json_data = jArray.getJSONObject(i);
                Brete resultRow = new Brete();
                resultRow.contenido = json_data.getString("contenido");
                resultRow.fecha = json_data.getString("fecha");
                resultRow.correo = json_data.getString("correo");
                arrayOfWebData.add(resultRow);
            }
        }
        catch(JSONException e){
                Log.e("log_tag", "Error parsing data "+e.toString());
        }

I'm trying to get the data of 'contenido', 'fecha' and 'correo' But I'm not getting any rows displayed. This is not the whole code and maybe the problem lies somewhere else, but I have a hunch this might be a problem of not parsing correctly the nested json with json_data.getString(). Any help is appreciated.