I get the following error when running the code.
java.lang.String cannot be cast to org.json.JSONObject
JSONObject data = ((JSONObject) response.get("data"));
String setting_name = data.getString("setting_name");
String setting_value = data.getString("setting_value");
First get you Data as a string try printing it to make sure it contain JSON... then pass it into JSONObject after which you will be able to retrieve JSON object like you mentioned.
JSONObject data = new JSONObject(YOUR-STRING-GOES-HERE);
After which you can do.
String setting_name = data.getString("setting_name");
Your response.get("data"); type is a String representing a JSON. So in order to get a JSONObject from it, you need to parse it first.
You achieve that by calling the following constructor from JSONObject class:
JSONObject(String json);
Creates a new JSONObject with name/value mappings from the JSON string.
Why are you casting it to JSONObject?
JSONObject data = new JSONObject(response.get("data"));
Beyond that its hard to say without seeing the more code/json data.
Make sure that the string is a valid JSON. You can user JSONObject parameterized constructor with the given string to convert the JSON string to a valid JSON object.
For example,
String jsonString = "{'setting_name': 'volume', 'setting_value':10}";
JSONObject data = new JSONObject(jsonString);
String setting_name = data.getString("setting_name"); //gives volume
String setting_value = data.getString("setting_value"); //gives 10
