Send POST request with JSON data using Volley

Question

I would like to send a new JsonObjectRequest request:

• I want to receive JSON data (response from server): OK

• I want to send JSON form

Answer 1

• Create an object of RequestQueue class.

  RequestQueue queue = Volley.newRequestQueue(this);
  

• Create a StringRequest with response and error listener.

   StringRequest sr = new StringRequest(Request.Method.POST,"http://api.someservice.com/post/comment", new Response.Listener() {
      @Override
      public void onResponse(String response) {
          mPostCommentResponse.requestCompleted();
      }
  }, new Response.ErrorListener() {
      @Override
      public void onErrorResponse(VolleyError error) {
          mPostCommentResponse.requestEndedWithError(error);
      }
  }){
      @Override
      protected Map getParams(){
          Map params = new HashMap();
          params.put("user",userAccount.getUsername());
          params.put("pass",userAccount.getPassword());
          params.put("comment", Uri.encode(comment));
          params.put("comment_post_ID",String.valueOf(postId));
          params.put("blogId",String.valueOf(blogId));
  
          return params;
      }
  
      @Override
      public Map getHeaders() throws AuthFailureError {
          Map params = new HashMap();
          params.put("Content-Type","application/x-www-form-urlencoded");
          return params;
      }
  };
  

• Add your request into the RequestQueue.

  queue.add(jsObjRequest);
  

• Create PostCommentResponseListener interface just so you can see it. It’s a simple delegate for the async request.

  public interface PostCommentResponseListener {
  public void requestStarted();
  public void requestCompleted();
  public void requestEndedWithError(VolleyError error);
  }
  

• Include INTERNET permission inside AndroidManifest.xml file.