Send Post Request Using Volley and Receive in PHP

Send post request using Volley and receive in PHP

Had a lot of problems myself, try this !

public class CustomRequest extends Request<JSONObject> {

private Listener<JSONObject> listener;
private Map<String, String> params;

public CustomRequest(String url,Map<String, String> params, Listener<JSONObject> responseListener, ErrorListener errorListener) {
    super(Method.GET, url, errorListener);
    this.listener = responseListener;
    this.params = params;
}

public CustomRequest(int method, String url,Map<String, String> params, Listener<JSONObject> reponseListener, ErrorListener errorListener) {
    super(method, url, errorListener);
    this.listener = reponseListener;
    this.params = params;
}

@Override
protected Map<String, String> getParams() throws com.android.volley.AuthFailureError {
    return params;
};

@Override
protected Response<JSONObject> parseNetworkResponse(NetworkResponse response) {
    try {
        String jsonString = new String(response.data, HttpHeaderParser.parseCharset(response.headers));

        return Response.success(new JSONObject(jsonString), HttpHeaderParser.parseCacheHeaders(response));
    } catch (UnsupportedEncodingException e) {
        return Response.error(new ParseError(e));
    } catch (JSONException je) {
        return Response.error(new ParseError(je));
    }
}

@Override
protected void deliverResponse(JSONObject response) {
    listener.onResponse(response);
}

PHP

$username = $_POST["username"];
$password = $_POST["password"];

echo json_encode($response);

You have to make a map, the map supports key-value type, and than you post with volley.
In php you get $variable = $_POST["key_from_map"] to retreive it's value in the $variable
Then you build up the response and json_encode it.

Here is a php example of how to query sql and post answer back as JSON

$response["devices"] = array();

    while ($row = mysqli_fetch_array($result)) {


        $device["id"] = $row["id"];
        $device["type"] = $row["type"];


        array_push($response["devices"], $device);  
    }

    $response["success"] = true;
    echo json_encode($response);

You can see here that the response type is JSONObject

public CustomRequest(int method, String url,Map<String, String> params, Listener<JSONObject> reponseListener, ErrorListener errorListener)

Look at the listener's parameter!

Send post and get request at the same time in VOLLEY

I'm sorry i just saw something in Request.Method .

I didnt change anything in this code , only i changed Request.Method.GET to Request.Method.DEPRECATED_GET_OR_POST

I just saw this method now. So its working perfectly.

I can't send POST request from android volley to php

I removed the "www" from the url and it solved my problem. This SO question POST Requests seen as GET by server helped

Unable to pass data to a POST request using Volley library - Android

You specified body format as application/json, and put through as an array(form-data), that may be affecting the result. The format should be multipart/form-data (or application/x-www-form-urlencoded, as per wiki).

Android Volley POST request: getting GET request method on server side (php)

Here is code you can use to make a POST request with the Volley library in android. Assuming you import your library as such in your application build.gradle file:

dependencies{
     .... 
     implementation 'com.android.volley:volley:1.1.0'
     .....
 }

The following code can be put in a method as some routine task to perform your POST request

String requestUrl = "http://myapi.com/api/postresource.php";
StringRequest stringRequest = new StringRequest(Request.Method.POST, requestUrl, new Response.Listener<String>() {
    @Override
    public void onResponse(String response) {
        Log.e("Volley Result", ""+response); //the response contains the result from the server, a json string or any other object returned by your server

    }
}, new Response.ErrorListener() {
    @Override
    public void onErrorResponse(VolleyError error) {
        error.printStackTrace(); //log the error resulting from the request for diagnosis/debugging

    }
}){

    @Override
    protected Map<String, String> getParams() throws AuthFailureError {
        Map<String, String> postMap = new HashMap<>();
        postMap.put("param1", "value1");
        postMap.put("param2", value2);
        //..... Add as many key value pairs in the map as necessary for your request
        return postMap;
    }
};
//make the request to your server as indicated in your request url
Volley.newRequestQueue(getContext()).add(stringRequest);

Post data using volley php

Try this code it worked for me in android app, and you have to use another url to post :

private void registerUser(){
        final String username = editTextUsername.getText().toString().trim();
        final String password = editTextPassword.getText().toString().trim();


        StringRequest stringRequest = new StringRequest(Request.Method.POST, REGISTER_URL,
                new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        //do stuffs with response of post
                    }
                },
                new Response.ErrorListener() {
                    @Override
                    public void onErrorResponse(VolleyError error) {
                        //do stuffs with response erroe
                    }
                }){
            @Override
            protected Map<String,String> getParams(){
                Map<String,String> params = new HashMap<String, String>();

                params.put(KEY_PASSWORD,password);
                params.put(KEY_EMAIL, email);
                return params;
            }

        };

        RequestQueue requestQueue = Volley.newRequestQueue(this);
        requestQueue.add(stringRequest);
    }

I'm not sure with you php code, but above android part works,

you may know that you have to,

Add internet permission :

<uses-permission android:name="android.permission.INTERNET" /> 

Add volley to build.gradle:

compile 'com.mcxiaoke.volley:library:1.0.19'

Thanks

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