1) Return your finalJson
from doInBackground
2) getString
& setText
in onPostExecute
JSONObject parentObject = new JSONObject(result);
String maxPrice = parentObject.getString("max");
String minPrice = parentObject.getString("min");
String avg = parentObject.getString("average");
tvMaxPrice.setText(maxPrice);
tvMinPrice.setText(minPrice);
tvAvg.setText(avg);