app

-------------------------------------------------------------------------------------------- affiche des utilisateurs
<?php

if($_SERVER["REQUEST_METHOD"]=="POST"){
    include 'config.php';
    showUsers();
}

function showUsers(){
  global $connect;

  $query="SELECT * FROM Utilisateurs WHERE connected=1;";

  $result=mysqli_query($connect, $query);
  $number_of_rows=mysqli_num_rows($result);

  $temp_array=[];

  if($number_of_rows > 0){
    while($row=mysqli_fetch_assoc($result)){
      $temp_array[]=$row;
    }
  }

  header('Content-Type: application/json');
  echo json_encode(array("Users"=>$temp_array));
  var_dump($temp_array);
  mysqli_close($connect);
}

---------------------------------------------------------------------------------------------- login (marche pas)
<?php

if($_SERVER["REQUEST_METHOD"]=="POST"){
  include 'config.php';
  connect();
}

function connect(){
  //Champs
  global $connect;
  $alias=$_POST["alias"];
  $password=$_POST["password"];

  //REQUEST
  $queryA="SELECT * FROM Utilisateurs WHERE alias='$alias' AND password='$password';";
  $queryB="UPDATE Utilisateurs SET connected=1 WHERE alias='$alias' AND password='$password';";
  $result=mysqli_query($connect, $queryA);
  $number_of_rows=mysqli_num_rows($result);

  $temp_array=[];

  if($number_of_rows > 0){
    while($row=mysqli_fetch_assoc($result)){
      $temp_array[]=$row;
    }
  }
  if(!empty($temp_array)){
        //Update connect
        header('Content-Type: application/json');
        print(json_encode(array("Users"=>$temp_array)));
  }
  mysqli_query($connect, $queryB);
  mysqli_close($connect);
}

------------------------------------------------------- afficher des users coté JAVA marche
private void showConnectedUsers() {
        JsonObjectRequest jsonObjectRequest = new JsonObjectRequest(Request.Method.POST, showUrl, new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {
                try {
                    JSONArray Users = response.getJSONArray("Users");
                    for (int i = 0; i < Users.length(); i++) {
                        JSONObject user = Users.getJSONObject(i);

                        String alias = user.getString("alias");
                        String mail = user.getString("mail");
                        String password = user.getString("password");
                        String nom = user.getString("nom");
                        String prenom = user.getString("prenom");

                        result.append(alias+" "+mail+" "+nom+" "+prenom+"\n");
                    }
                }
                catch (JSONException e) {
                    e.printStackTrace();
                }
            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError e) {

            }
        });
        requestQueue.add(jsonObjectRequest);
    }

--------------------------------------------------------------- login coté Java marche pas
private void connectUser() {
        final JsonObjectRequest request = new JsonObjectRequest(Request.Method.POST, connectUrl, new Response.Listener<JSONObject>() {
            @Override
            public void onResponse(JSONObject response) {
                try {

                    JSONArray Users = response.getJSONArray("Users");
                    for (int i = 0; i < Users.length(); i++) {
                        JSONObject user = Users.getJSONObject(i);

                        String alias = user.getString("alias");
                        String mail = user.getString("mail");
                        String password = user.getString("password");
                        String nom = user.getString("nom");
                        String prenom = user.getString("prenom");

                        User = new UserModel(alias, password, mail, nom, prenom);

                    }
                    test.append(User.getAlias());
                    //userLocalStore.storeUserData(User);
                    userLocalStore.setUserLoggedIn(true);
                }
                catch (JSONException e) {
                    e.printStackTrace();
                }

            }
        }, new Response.ErrorListener() {
            @Override
            public void onErrorResponse(VolleyError e) {
                Toast.makeText(ConnectActivity.this, e.toString(), Toast.LENGTH_LONG).show();
            }
        }) {
            @Override
            public Map<String, String> getHeaders() throws AuthFailureError {
                Map<String, String> headers = new HashMap<String, String>();
                headers.put("Content-Type", "application/json; charset=utf-8");
                return headers;
            }
        };
        requestQueue.add(request);
    }