How to Parse a JSON File from the Assets Folder in Android

Nowadays, Usage of JSON in Android is typically increasing. Here we are going to discuss how to read a JSON file from the assets folder in android

Get the JSON from Asset

Consider we are having json file student_rank.json like this:

{
  "student" : 
  [ 
    {
      "name" : "Peter",
      "rank": 17,
      "age" : 12
    },
    {
      "name" : "John",
      "rank": 19,
      "age" : 12
    },
    {
      "name" : "Tony",
      "rank": 7,
      "age" : 13
    }
  ]
}

Save that student_rank.json in a assets folder /assets/student_rank.json. If you haven't created an assets folder yet see how to create an assets folder in android. Then parse that JSON file using getJSON() function.

    private String getJSON() {
        String json = null;
        try {
            InputStream ist = getActivity().getAssets().open("student_rank.json");
            int size = ist.available();
            byte[] buffer = new byte[size];
            ist.read(buffer);
            ist.close();
            json = new String(buffer, "UTF-8");
        } catch (IOException ex) {
            ex.printStackTrace();
            return null;
        }
        return json;
    }

The above getJson() function reads the JSON file and converts that into a JSON string.

Parsing JSON in Android

    private void parseJson() {
        try {
            JSONObject obj = new JSONObject(getJSON());
            JSONArray m_jArry = obj.getJSONArray("student");
            for (int i = 0; i < m_jArry.length(); i++) {
                JSONObject hit = m_jArry.getJSONObject(i);
                String name = hit.getString("name");
                int rank = hit.getInt("rank");
                int age = hit.getInt("age");

                // so you can get that json values.

            }
        } catch (JSONException e) {
            e.printStackTrace();
        }
    }

parseJson() function converts the json string into JSONObject then converts that into JSONArray. using for loop you can get the values of json.