CallApi.java

CallApi.java

private void callGetTopRatedMoviesApi() {

        /**
         * Checking internet connection before api call.
         * Very important always take care.
         */

        if (!Utils.isNetworkAvailable(this)) {
            Toast.makeText(this,
                    "No internet ..Please connect to internet and start app again",
                    Toast.LENGTH_SHORT).show();
            return;
        }

        showProgress();


        //constructing api url
        String ws_url = BASE_URL_APPLICATION + MOVIE + TOP_RATED +
                "?api_key=" + API_KEY + "&language=en-US&page=" + pageNumber;

        //Using Volley to call api

        WebApiRequest webApiRequest = new WebApiRequest(Request.Method.GET,
                ws_url, ReqSuccessListener(), ReqErrorListener());
        Volley.newRequestQueue(MovieListingActivity.this).add(webApiRequest);
    }

    /**
     * Success listener to handle the movie listing
     * process after api returns the movie list
     *
     * @return
     */

    private Response.Listener<String> ReqSuccessListener() {
        return new Response.Listener<String>() {
            public void onResponse(String response) {
                Log.e("movie list_response", response);
                try {
                    hideProgress();
                    pageNumber++;

                    MovieList movieListModel = (MovieList) Utils.jsonToPojo(response, MovieList.class);

                    if (movieListModel.getResults() != null &&
                            movieListModel.getResults().size() > 0) {
                        moviesRecyclerAdapter.addMovies(movieListModel.getResults());
                    } else {
                        Log.e(TAG, "list empty==");
                    }

                } catch (Exception e) {
                Log.e(TAG,"Exception=="+e.getLocalizedMessage());
                }
            }
        };
    }

    /**
     * To Handle the error
     *
     * @return
     */

    private Response.ErrorListener ReqErrorListener() {
        return new Response.ErrorListener() {
            public void onErrorResponse(VolleyError error) {

                Log.e("volley error", "volley error");
                Toast.makeText(MovieListingActivity.this, "" +
                        "Server Error..Please try again after sometime", Toast.LENGTH_SHORT).show();
            }
        };
    }