如何使用 android volley 将字符串值从应用程序传递到 php web 服务

Question

I want to implement a search feature in my app.ie I want to print to some specific data according to user input as string.

here is my java code:

 JsonArrayRequest movieReq = new JsonArrayRequest(url,
                new Response.Listener<JSONArray>() {
                    @Override
                    public void onResponse(JSONArray response) {
                        Log.d(TAG, response.toString());
                        hidePDialog();

                        // Parsing json
                        for (int i = 0; i < response.length(); i++) {

                            try {
                                JSONObject obj = response.getJSONObject(i);
                                Movie movie = new Movie();
                                movie.setTitle(obj.optString("fullname"));
                                movie.setThumbnailUrl(obj.optString("image"));
                                movie.setRating(obj.optString("location"));

                                movie.setYear(obj.getInt("id"));

                        movie.setGenre(genre);

                                // adding movie to movies array
                                movieList.add(movie);

                            } catch (JSONException e) {
                                e.printStackTrace();
                            }

               });
                        }


                        adapter.reloadData();
                    }
                }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError error) {
                VolleyLog.d(TAG, "Error: " + error.getMessage());
                hidePDialog();

            }
        })

        {
            @Override
            protected Map<String, String> getParams() {
                Map<String, String> params = new HashMap<String, String>();
                params.put("fullname", "test");// this is variable and hardcoded passed value for testing

                return params;
            }
        }
            ;

        // Adding request to request queue
        AppController.getInstance().addToRequestQueue(movieReq);

Here is my php code:

<?php
    header("content-type:application/json");
    require_once("dbConnect.php");

    if($_SERVER['REQUEST_METHOD']=='POST'){
         if(isset($_POST['fullname'])){
    $fullname = $_POST['fullname'];


    $sql = "SELECT id ,image,fullname,location from uploadfinding WHERE fullname like '%$fullname%'";

    $res = mysqli_query($conn,$sql);


    $result = array();

    while($row = mysqli_fetch_array($res)){
            array_push($result, array(

                "id"=>$row["id"],
                "fullname"=>$row["fullname"],
                "image"=>$row['image'],
                "location"=>$row["location"]));

                //echo " over";

        }


    $fp = fopen('results.json', 'w');
    fwrite($fp, json_encode($result));
    fclose($fp);            
    echo json_encode($result);

    mysqli_close($conn);
         }
    }
    ?>

I'm using volley library and I'm trying to pass a hard coded value in the variable and trying to use it on php code like this:

 params.put("fullname", "test");//here fullname is variable and test is hardcoded  value

but that hard coded passed value in the variable didn't get in php variable (with same name),that's why desired input not saved in php variable and my search is not working. So how to resolve this issue?

Answer 1

You are doing a JsonArrayRequest. But your php script is for a normal POST request.