Deserialize JSON string in Android Studio with HASH MAP

json_toList_android

     //The JSON FILE
     {
  "users": [
    {
      "id": "1087",
      "name": "Abhishek Saini",
      "email": "[email protected]",
      "gender" : "male",
      "contact": {
        "mobile": "+91 0000000000",
        "home": "00 000000",
        "office": "00 000000"
      }
    },
    {
      "id": "1088",
      "name": "Gourav",
      "email": "[email protected]",
      "gender" : "male",
      "contact": {
        "mobile": "+91 0000000000",
        "home": "00 000000",
        "office": "00 000000"
      }
    }
  ]
}
//Load data from JSON FILE
   
    public String loadJSONFromAsset() {
        String json = null;
        try {
            InputStream is = getAssets().open("users_list.jason");
            int size = is.available();
            byte[] buffer = new byte[size];
            is.read(buffer);
            is.close();
            json = new String(buffer, "UTF-8");
        } catch (IOException ex) {
            ex.printStackTrace();
            return null;
        }
        return json;
    }
//On create code     
       
     ListView listView = (ListView) findViewById(R.id.list);

        try {
            // get JSONObject from JSON file
            JSONObject obj = new JSONObject(loadJSONFromAsset());
            // fetch JSONArray named users
            JSONArray userArray = obj.getJSONArray("users");
            // implement for loop for getting users list data
            List<Map<String,String>> list =new ArrayList <Map<String,String>>();
            for (int i = 0; i < userArray.length(); i++) {
                 
                Map<String,String> map=new HashMap<String, String>() ;
                JSONObject userDetail = userArray.getJSONObject(i);
                // fetch email and name and store it in arraylist
                 map.put("name",userDetail.getString("name"));
 
                // create a object for getting contact data from JSONObject
                 JSONObject contact = userDetail.getJSONObject("contact");
                // fetch mobile number and store it in arraylist
             
                map.put("mobile",contact.getString("mobile"));

                list.add(map);
            }
            String []col={"name","mobile"};
            int []view={R.id.textView,R.id.MobileView};             
            SimpleAdapter simpleAdapter=new SimpleAdapter(this,list,R.layout.activity_listview,col,view);
            listView.setAdapter(simpleAdapter);

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