How to make separate class for volley library and call all method of volley from another activity and get response?

Question

how to create a separate class in which define all about volley and in another activity we directly pass URL,CONTEXT and Get Response...

Answer 1

JsonParserVolley.java

(A separate class where we will get the response)

public class JsonParserVolley {

final String contentType = "application/json; charset=utf-8";
String JsonURL = "Your URL";
Context context;
RequestQueue requestQueue;
String jsonresponse;

private Map header;

public JsonParserVolley(Context context) {
    this.context = context;
    requestQueue = Volley.newRequestQueue(context);
    header = new HashMap<>();

}

public void addHeader(String key, String value) {
    header.put(key, value);
}

public void executeRequest(int method, final VolleyCallback callback) {

    StringRequest stringRequest = new StringRequest(method, JsonURL, new Response.Listener() {
        @Override
        public void onResponse(String response) {
            jsonresponse = response;
            Log.e("RES", " res::" + jsonresponse);
            callback.getResponse(jsonresponse);


        }
    }, new Response.ErrorListener() {
        @Override
        public void onErrorResponse(VolleyError error) {

        }
    }) {
        @Override
        public Map getHeaders() throws AuthFailureError {

            return header;
        }
    }
    ;
    requestQueue.add(stringRequest);

}

public interface VolleyCallback
{
    public void getResponse(String response);
}

}

MainActivity.java (Code Snippet written in onCreate method)

final JsonParserVolley jsonParserVolley = new JsonParserVolley(this);
    jsonParserVolley.addHeader("Authorization", "Your value");
    jsonParserVolley.executeRequest(Request.Method.GET, new JsonParserVolley.VolleyCallback() {

        @Override
        public void getResponse(String response) {

            jObject=response;
            Log.d("VOLLEY","RES"+jObject);

            parser();
        }
    }
    );

parser() is the method where the json response obtained is used to bind with the components of the activity.