Android Volley MalformedURLException: no protocol

Using Volley i am trying to send POST headers and receive a StringRequest but I'm getting a RuntimeException Caused by: java.net.MalformedURLException: no protocol, but i have a protocol.

I send a cookie and a token that are correct

Here is my code:

HttpClient httpClient = new DefaultHttpClient();
httpPost = new  HttpPost("http://ipServer:portServer/xxx/products.json?place_id=1");

        httpPost.addHeader("Content-type", "application/json");
        httpPost.addHeader("cookie", cookieTmp);
        httpPost.addHeader("X-CSRF-Token", tokenTmp);

StringRequest request = new StringRequest(Request.Method.GET, String.valueOf(httpPost),
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        Log.i("VOLLEY", response);
                        startActivity(new Intent(getApplicationContext(), 
                        MainActivity.class));
                        LoginActivity.this.finish();
                }
                }, new Response.ErrorListener() {

            @Override
            public void onErrorResponse(VolleyError error) {

                L.m("not response");
                handleVolleyError(error);

And im getting this exception:

E/Volley: [1070] NetworkDispatcher.run: Unhandled exception java.lang.RuntimeException: Bad URL org.apache.http.client.methods.HttpPost@c9461c0
      java.lang.RuntimeException: Bad URL org.apache.http.client.methods.HttpPost@c9461c0
          at com.android.volley.toolbox.BasicNetwork.performRequest(BasicNetwork.java:151)
          at com.android.volley.NetworkDispatcher.run(NetworkDispatcher.java:114)
       Caused by: java.net.MalformedURLException: no protocol: org.apache.http.client.methods.HttpPost@c9461c0
          at java.net.URL.<init>(URL.java:589)
          at java.net.URL.<init>(URL.java:486)
          at java.net.URL.<init>(URL.java:435)
          at com.android.volley.toolbox.HurlStack.performRequest(HurlStack.java:102)
          at com.android.volley.toolbox.BasicNetwork.performRequest(BasicNetwork.java:97)
          at com.android.volley.NetworkDispatcher.run(NetworkDispatcher.java:114) 

The tests I perform in Postman work correctly. Any ideas on what could be causing this?

In between of coding you used two different codes, such as "get" and "add".

Please make it consistent.

First try it with this:

 httpPost.addHeader("Content-type", "application/json"); 
 httpPost.addHeader("cookie", cookieTmp); 
 httpPost.addHeader("X-CSRF-Token", tokenTmp); 

And then with this:

  httpPost.setHeader("Content-type", "application/json"); 
 httpPost.setHeader("cookie", cookieTmp); 
 httpPost.setHeader("X-CSRF-Token", tokenTmp); 

Edited