JSONException: Value of type java.lang.String cannot be converted to JSONObject

Question

I have a JSON file with 2 JSON-Arrays in it: One Array for routes and one Array for sights.

A route should consist of several sights where the user gets navigated to

Answer 1

return response;

After that get the response we need to parse this By:

JSONObject myObj=new JSONObject(response);

On response there is no need for double quotes.

Answer 2

In my case, my Android app uses Volley to make a POST call with an empty body to an API application hosted on Microsoft Azure.

The error was:

JSONException: Value <p>iisnode of type java.lang.String cannot be converted to JSONObject

This is a snippet on how I was constructing the Volley JSON request:

final JSONObject emptyJsonObject = new JSONObject();
JsonObjectRequest request = new JsonObjectRequest(Request.Method.POST, url, emptyJsonObject, listener, errorListener);

I solved my problem by creating the JSONObject with an empty JSON object as follows:

final JSONObject emptyJsonObject = new JSONObject("{}");

My solution is along the lines to this older answer.

Answer 3

I think the problem may be in the charset that you are trying to use. It is probably best to use UTF-8 instead of iso-8859-1.

Also open whatever file is being used for your InputStream and make sure no special characters were accidentally inserted. Sometimes you have to specifically tell your editor to display hidden / special characters.

Answer 4

I made this change and now it works for me.

//BufferedReader reader = new BufferedReader(new InputStreamReader(is, "iso-8859-1"), 8);
BufferedReader reader = new BufferedReader(new InputStreamReader(is, HTTP.UTF_8), 8);

Answer 5

This worked for me

json = json.replace("\\\"","'");
JSONObject jo = new JSONObject(json.substring(1,json.length()-1));

Answer 6

In my case the problem occured from php file. It gave unwanted characters.That is why a json parsing problem occured.

Then I paste my php code in Notepad++ and select Encode in utf-8 without BOM from Encoding tab and running this code-

My problem gone away.