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

public class VolleyService {

    IResult mResultCallback = null;
    Context mContext;

    VolleyService(IResult resultCallback, Context context)
    {
        mResultCallback = resultCallback;
        mContext = context;
    }

    //--Post-Api---
    public void postDataVolley(String url,final Map param){
        try {
            StringRequest sr = new StringRequest(Request.Method.POST, url, new Response.Listener() {
                @Override
                public void onResponse(String response) {
                    if(mResultCallback != null)
                        mResultCallback.notifySuccessPost(response);
                }
            },  new Response.ErrorListener() {
                @Override
                public void onErrorResponse(VolleyError error) {
                    if(mResultCallback != null)
                        mResultCallback.notifyError(error);
                }
            }) {
                @Override
                protected Map getParams() {
                    return param;
                }

                @Override
                public Map getHeaders() throws AuthFailureError {
                    Map params = new HashMap();
                    params.put("Content-Type", "application/x-www-form-urlencoded");
                    return params;
                }
            };
            AppController.getInstance(mContext).addToRequestQueue(sr);

        }catch(Exception e){

        }
    }
    //==Patch-Api==
    public void patchDataVolley(String url,final HashMap param)
    {
        JsonObjectRequest request = new JsonObjectRequest(Request.Method.PATCH, url, new JSONObject(param),
                new Response.Listener() {
                    @Override
                    public void onResponse(JSONObject response) {
                        if(mResultCallback != null)
                            mResultCallback.notifySuccessPatch(response);
                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        if(mResultCallback != null)
                            mResultCallback.notifyError(error);
                    }
                }) {
            @Override
            public Map getHeaders() throws AuthFailureError {
                HashMap headers = new HashMap();
                return headers;
            }
        };
        AppController.getInstance(mContext).addToRequestQueue(request);
    }
}

public interface IResult {
    void notifySuccessPost(String response);

    void notifySuccessPatch(JSONObject jsonObject);

    void notifyError(VolleyError error);

}