Enrique Espinosa's questions

I have a problem with a constructor that I am trying to create in php, I don't understand why I get a syntax error when I write the constructor in this way:

I don't understand is it due to the version of php or what am I doing wrong, now if I remove all the public on screen from the constructor it prints the following error:

Catchable fatal error: Argument 1 passed to Product::__construct() must be an instance of string, string given

I don't understand that error either, my class and my function are being called in this way:

$producto = new Producto('Teclado', 200, true);
$producto->mostrarProducto();

echo "<pre>";
var_dump($producto);
echo "</pre>";

I have a problem. I have to submit a form that allows multiple documents to be attached. Each <input type="file">gives the option to add more documents.

My question is, I want to process that form with JavaScriptand then send it to phpto record the information in my DB. How can I do it?

I was thinking of creating an array of the filesusing the attribute nameand traversing them with the function mapin one arrayor creating an array with all the temp_namein one array.

This is my form:

And currently in javascriptthe process like this:

function registroSolicitud(){

    var datosSolicitud = new FormData($( "#form-solicitud" )[0]);

    $.ajax({
        type: "POST",
        url: "/centro/panel/controller/controlador_solicitud.php",
        data: datosSolicitud,
        contentType: false,
        processData: false,
        cache: false,
        success: function(data){

        }
    });
    
    return false;
}

The problem is that if I do it this way I get the <input type="file">a PHP.

I have a problem, I am doing a query composed of two INNER JOINs to retrieve information from 3 different tables, the problem is that when I put the ON clause and put the following egresses.account = 15 , it gives me the following error:

The column 'egresos_test.cuenta' in on clause is unknown

This is my full query:

> SELECT cuentas.no_cuenta, sum(saldo) saldo from
> bank_log INNER JOIN cuentas ON
> cuentas.id_cuenta = 15 INNER JOIN (SELECT sum(cantidad)
> egresosTotal FROM egresos WHERE cuenta = 15) AS egresosTotal ON
> egresos.cuenta = 15 WHERE bank_log.no_cuenta = 15 ORDER BY
> bank_log.id_registro DESC LIMIT 1

I do not understand why it does not find the clomuna account in the second INNER JOIN where I add the amount, if I am placing egress.account.

Update:

I have tried using this solution:

SELECT cuentas.no_cuenta, sum(saldo) saldo 
  from bank_log 
       INNER JOIN cuentas ON cuentas.id_cuenta = 15 
       CROSS JOIN (SELECT sum(cantidad) egresosTotal 
                     FROM egresos 
                    WHERE cuenta = 15) AS egresosTotal 
 WHERE bank_log.no_cuenta = 15 
 ORDER BY bank_log.id_registro DESC 
 LIMIT 1

But the problem now is that when executing the query it does not print the result of egresosTotal, it only prints two columns of 3.

I have a problem in Android, I am using a Bottom navigation, the problem is that when I change between fragments if it makes the change but the view but the view of the first fragment is still seen in the others even if it is changed.

What is inside the blue box is the view of the first fragment that would be the home, and what is in red is the view of the second fragment that is the dashboard.

The home fragment has a recycler view and cards view.

This is the XML of the MainActivity, here is the nav_host_fragment where I do the transaction:

<?xml version="1.0" encoding="utf-8"?>
<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/container"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    >

    <com.google.android.material.bottomnavigation.BottomNavigationView
        android:id="@+id/nav_view"
        android:layout_width="0dp"
        android:layout_height="wrap_content"
        android:layout_marginStart="0dp"
        android:layout_marginEnd="0dp"
        android:background="?android:attr/windowBackground"
        app:layout_constraintBottom_toBottomOf="parent"
        app:layout_constraintLeft_toLeftOf="parent"
        app:layout_constraintRight_toRightOf="parent"
        app:menu="@menu/bottom_nav_menu" >

    </com.google.android.material.bottomnavigation.BottomNavigationView>

    <fragment
        android:id="@+id/nav_host_fragment"
        android:name="androidx.navigation.fragment.NavHostFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginBottom="43dp"
        app:defaultNavHost="true"
        app:layout_constraintBottom_toTopOf="@+id/nav_view"
        app:layout_constraintEnd_toEndOf="parent"
        app:layout_constraintStart_toStartOf="parent"
        app:layout_constraintTop_toTopOf="parent"
        app:navGraph="@navigation/mobile_navigation" />

</androidx.constraintlayout.widget.ConstraintLayout>

This is how I handle shard transactions.

public class MainActivity extends AppCompatActivity {

    private AppBarConfiguration mAppBarConfiguration;
    final Fragment homeFragment = new HomeFragment();
    final Fragment linksFragment = new DashboardFragment();
    final Fragment quienesSomos = new NotificationsFragment();
    final FragmentManager fragmentManager = getSupportFragmentManager();
    Fragment active = homeFragment;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);
        BottomNavigationView navView = findViewById(R.id.nav_view);
        // Passing each menu ID as a set of Ids because each
        // menu should be considered as top level destinations        

        navView.setOnNavigationItemSelectedListener(myOnNavigationListener);

        fragmentManager.beginTransaction().add(R.id.nav_host_fragment, quienesSomos, "quienesSomos").hide(quienesSomos).commit();
        fragmentManager.beginTransaction().add(R.id.nav_host_fragment, linksFragment, "linksFragment").hide(linksFragment).commit();
        fragmentManager.beginTransaction().add(R.id.nav_host_fragment, homeFragment, "homeFragment").hide(homeFragment).commit();
        Log.d("ACTIVE","Activo: "+active.getTag());

    }

    private BottomNavigationView.OnNavigationItemSelectedListener myOnNavigationListener = new BottomNavigationView.OnNavigationItemSelectedListener() {
        @Override
        public boolean onNavigationItemSelected(@NonNull MenuItem item) {
            switch (item.getItemId()){

                case R.id.navigation_home:
                    fragmentManager.beginTransaction().hide(active).show(homeFragment).commit();
                    //fragmentManager.beginTransaction().replace(active.getId(), homeFragment).commit();
                    active = homeFragment;
                    Log.d("ACTIVE","Activo: "+active.getTag());
                    return true;

                case R.id.navigation_links:
                    fragmentManager.beginTransaction().hide(active).show(linksFragment).commit();
                    //fragmentManager.beginTransaction().replace(active.getId(), linksFragment).commit();
                    active = linksFragment;
                    Log.d("ACTIVE","Activo: "+active.getTag());
                    return true;

                case R.id.navigation_qsomos:
                    fragmentManager.beginTransaction().hide(active).show(quienesSomos).commit();
                    //fragmentManager.beginTransaction().replace(active.getId(), quienesSomos).commit();
                    active = quienesSomos;
                    Log.d("ACTIVE","Activo: "+active.getTag());
                    return true;
            }
            return false;
        }
    };

}

I don't know why the first displayed fragment is not removed when switching to other fragments.

This is the XML of the home fragment, where my ListView is loaded:

<?xml version="1.0" encoding="utf-8"?>
<androidx.recyclerview.widget.RecyclerView xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:id="@+id/list"
    android:name="com.seccion.seccion15.ui_session.inicio_session.InicioSessionItemFragment"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    android:layout_marginLeft="0dp"
    android:layout_marginRight="0dp"
    app:layoutManager="LinearLayoutManager"
    tools:context=".ui.home.HomeFragment"
    tools:listitem="@layout/fragment_home_item_list" />

And this is where I load my CardView to be displayed in the list:

<?xml version="1.0" encoding="utf-8"?>
<androidx.cardview.widget.CardView
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="120dp"
    android:layout_marginTop="0dp"
    android:layout_marginLeft="0dp"
    android:layout_marginRight="0dp"
    android:layout_marginBottom="0dp">

    <androidx.constraintlayout.widget.ConstraintLayout
        android:layout_width="match_parent"
        android:layout_height="match_parent">

        <TextView
            android:id="@+id/titulo_post"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_marginTop="16dp"
            android:layout_marginEnd="8dp"
            android:text="Titlo de la noticia"
            android:textColor="#000000"
            android:textStyle="bold"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@+id/imagen_noticia"
            app:layout_constraintTop_toTopOf="parent" />

        <TextView
            android:id="@+id/vista_previa"
            android:layout_width="0dp"
            android:layout_height="60dp"
            android:layout_marginStart="8dp"
            android:layout_marginEnd="8dp"
            android:maxLines="3"
            android:text="Vista previa"
            android:textColor="#000000"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@+id/imagen_noticia"
            app:layout_constraintTop_toBottomOf="@+id/titulo_post" />

        <TextView
            android:id="@+id/fecha_post"
            android:layout_width="0dp"
            android:layout_height="wrap_content"
            android:layout_marginStart="8dp"
            android:layout_marginEnd="8dp"
            android:layout_marginBottom="15dp"
            android:text="Fecha del post"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintEnd_toEndOf="parent"
            app:layout_constraintStart_toEndOf="@+id/imagen_noticia"
            app:layout_constraintTop_toBottomOf="@+id/vista_previa" />

        <ImageView
            android:id="@+id/imagen_noticia"
            android:layout_width="102dp"
            android:layout_height="95dp"
            android:layout_marginStart="8dp"
            android:layout_marginTop="8dp"
            android:layout_marginBottom="8dp"
            android:scaleType="centerCrop"
            app:layout_constraintBottom_toBottomOf="parent"
            app:layout_constraintStart_toStartOf="parent"
            app:layout_constraintTop_toTopOf="parent"
            tools:srcCompat="@tools:sample/avatars" />
    </androidx.constraintlayout.widget.ConstraintLayout>

</androidx.cardview.widget.CardView>

I have a problem, I am recovering content from a web page using

product.querySelector('div#productspecification').innerHTMLfrom NodeJS

If this works, it returns the content that is inside that div, with that id. the problem is that it returns two <div>with javascript tags that I can't store in the database. These are the <div>ones with javascript tags:

<div class="col-md-1" data-hideonprint="true">
   <script type="text/javascript" src="/Site/Scripts/CNet.js"></script>
   <script type="text/javascript">
      window.onload = function () {
      handleCnetLogos('https://ws.cnetcontent.com','https:                 //ws.cnetcontent.com','c7b4bb94','KONICA%20MINOLTA','8938613','MX01@@6030@@10@@','es_MX','1','1x4',false);
      }
   </script>
  <div id="ccslogos">
  </div>
</div>

how can i remove the javascript tags and content like the window.onload

I have a problem adding a new select dynamically in html with javascript, the problem is that I already have a select that loads its content with php and from a database, I have a button so that my users can add a select but the problem is that this select as it is loaded from javascript does not load the data from my database with php, how can I do it?

In the image attached below I have two inputs for people to add a name and a quantity along with an icon to add more fields.

If I click the button to add more fields, they are added correctly:

I want to change the name input for a select that loads its content from my database, if I place the first select with the data loaded from my database, it works without problems but when adding new fields it no longer loads the information.

This is how I load my select:

<label for="sell">Selecciona una empresa:</label>
 <select class="form-control" id="empresa" name="empresa">
    <?php
        $empresas = new ConsultaEmpresa();
        $empresasGeneral = $empresas->consultarEmpresas();
        foreach ($empresasGeneral as $key => $value) {
            echo "<option id='cuenta' value=".$value['id_empresas'].">".$value['empresa']."</option>";
        }
    ?>
</select>

And the way I add my inputs is with JavaScript like this:

$(document).ready(function(){
    var maxField = 10; //Input fields increment limitation
    var addButton = $('.add_button'); //Add button selector
    var wrapper = $('.field_wrapper'); //Input field wrapper
    var fieldHTML = '<div>'+
                    '<input type="text" name="field_name[]" placeholder="Agrega un nombre" value=""/> '+
                    '<input type="text" placeholder="Agrega una cantidad" name="field_cantidad[]" id="cantidad" onKeyPress="return soloNumeros(event)" value=""/>'+
                    '<a href="javascript:void(0);" class="remove_button" title="Remove field"><img src="img/removeuser.png" width="40px"/></a></div>'; //New input field html 
    var x = 1; //Initial field counter is 1
    $(addButton).click(function(){ //Once add button is clicked
        if(x < maxField){ //Check maximum number of input fields
            x++; //Increment field counter
            $(wrapper).append(fieldHTML); // Add field html
        }
    });
    $(wrapper).on('click', '.remove_button', function(e){ //Once remove button is clicked
        e.preventDefault();
        $(this).parent('div').remove(); //Remove field html
        x--; //Decrement field counter
    });
});

I have a problem with a JSON, the problem is that I am receiving a technical sheet from a JSON. The problem is not to consult the information, the problem I have is that it is not always the same information in the JSON, let me explain, in some technical sheets the first two fields can be Product type and Number of labels per roll , but in others technical sheets the first fields are Type of product and the second is manageable

The problem is that for example if I wanted to do the following:

$product = $array['technical_sheet'][labels_per_roll];

Sometimes it would give me an error because some technical sheets do not have this field and from here my doubt arises if it is possible that instead of processing the json I can print it with an HTML format?

I attach some images of the differences between the json that I can receive in the technical sheets:

I have a problem, I am working with Xcode 11.3.1 and when I run my app, which was created in a previous version of Xcode, my statusBar is not visible, I don't know if it is a bug in the emulators or if I need some configuration .

If I run my app it appears like this.

I don't understand why the statusBar is not being shown, I have tried with this code but it doesn't work for me.

self.navigationController?.setNavigationBarHidden(false, animated: true)
if #available(iOS 13.0, *){
  let navBarAppearance = UINavigationBarAppearance()
  navBarAppearance.configureWithOpaqueBackground()
  navBarAppearance.titleTextAttributes = [.foregroundColor: UIColor.white]
  navBarAppearance.largeTitleTextAttributes = [.foregroundColor: UIColor.white]
  navBarAppearance.backgroundColor = UIColor.red
  self.navigationController?.navigationBar.scrollEdgeAppearance = navBarAppearance
  self.navigationController?.navigationBar.standarAppearance = navBarAppearance
}

But I have not been able to show the status bar.

I have a problem when trying to execute a CURL passing parameters with the POST method, the CURL that I want to execute is this:

curl -X POST \
  'https://api.mercadopago.com/v1/payments?access_token=ACCESS_TOKEN_ENV' \
  -d '{
    "token":"b3a7dbec3eb0d71798c4f19fec445795",
    "installments":1,
    "transaction_amount":58.80,
    "description":"Point Mini a maquininha que dá o dinheiro de suas vendas na hora",
    "payment_method_id":"visa",
    "payer":{
    "email":"[email protected]"

    }

These are the minimum data that Mercado Pago asks me to be able to make a record of a new payment, I am trying to execute this query from PHP, I am trying the following:

<?php

  $curl = curl_init();
  $token = "5ad1c4126a25bbabc068961e69e7d5ce";
  $installments = 1;
  $transaction_amount = 100;
  $description = "Pago desde cURL";
  $payment_method_id = "master";
  $payer = array(
  "email" => "[email protected]"
  );

  curl_setopt($curl, CURLOPT_URL,'https://api.mercadopago.com/v1/payments?access_token=TEST-1234-56789-101112-456789');
  curl_setopt($curl, CURLOPT_HEADER, 0);
  curl_setopt($curl, CURLOPT_HTTPHEADER, array('Content-Type: application/json'));
  curl_setopt($curl, CURLOPT_RETURNTRANSFER, true);
  curl_setopt($curl, CURLOPT_CUSTOMREQUEST, "POST");
  curl_setopt($curl, CURLOPT_FOLLOWLOCATION, 1);
  curl_setopt($curl, CURLOPT_POSTFIELDS, "{\"transaction_amount\" : \"$transaction_amount\",
                                           \"token\" : \"$token\",
                                           \"description\" : \"$description\",
                                           \"installments\" : \"$installments\",
                                           \"payment_method_id\" : \"$payment_method_id\",
                                           \"payer\" : \"$payer\"}");
  $data = curl_exec($curl);
  curl_close($curl);
  echo $data;

?>

But when executing in postman it gives me the following two errors:

<br />
<b>Notice</b>:  Array to string conversion in <b>C:\xampp20\htdocs\Apoya pagos\Curl\pago_curl.php</b> on line <b>24</b><br />
{
    "message": "transaction_amount attribute must be numeric",
    "error": "bad_request",
    "status": 400,
    "cause": [
        {
            "code": 4003,
            "description": "transaction_amount attribute must be numeric",
            "data": null
        }
    ]
}

I don't know what I'm doing wrong when sending my payer field as an array and I don't understand why it tells me that transaction_amount must be numeric when I'm passing it as a number.

I have a problem, I created some buttons in a cell of a UITableView, my cell has a class where the IBoutlets of my labels and my buttons are created, and in the cellForRowAt method I assign my cell as follows:

let cell = tableview.dequeueReusableCell(withIdentifier: "cell", for: indexPath) as! PostViewCell

the problem I have is that when I want to use one of the buttons that I create from that cell I do the following:

cell.btnLike.addTarget(self, action: #selector(addLike(idPost:idLike:)), for: .touchUpInside)

I do it this way to be able to access a function called addLike that receives two parameters:

@objc func addLike(idPost: Int, idLike: Int){
        print("Like")
    }

As I am making use of a #selector to my function, I added the @objc so that it can be used within that selector, now my problem is that I don't know how I can pass the two parameters, that is, something similar to this:

#selector(addLike(idPost: 1, idUserPost: 2))

If I do it this way, I get an error, my question is, how can I pass two parameters from the #selector.

I have a problem with a SwipeRefreshLayout, I want to implement it to be able to perform the Pull to refresh function in a view that contains a RecyclerView, the problem is that when I add the SwipeRefreshLayout and run my app, the RecyclerView no longer shows me anything, it shows me completely blank, this is my XML file:

<?xml version="1.0" encoding="utf-8"?>
<androidx.swiperefreshlayout.widget.SwipeRefreshLayout
    xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_height="match_parent"
    android:layout_width="match_parent">

    <androidx.recyclerview.widget.RecyclerView
        android:id="@+id/list"
        android:name="com.seccion.yugioh.ui.inicio.InicioCartasItemFragment"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_marginLeft="16dp"
        android:layout_marginRight="16dp"
        app:layoutManager="LinearLayoutManager"
        tools:context=".ui.inicio.InicioCartasItemFragment"
        tools:listitem="@layout/fragment_inicio_cartas_item" />

</androidx.swiperefreshlayout.widget.SwipeRefreshLayout>

I don't understand what the problem is, I'm just adding the SwipeRefresh to be able to reload my RecyclerView when the user pulls the view but once it's added I don't see anything in the RecyclerView anymore.

The list is supposed to display a list of cards:

And when I run my application with SwipeRefresh, nothing is shown:

And this is my class where I load that RecyclerView:

public class InicioCartasItemFragment extends Fragment {

    private int mColumnCount = 1;
    //Declaramos como variable global el recyclerView
    private RecyclerView recyclerView;
    //Declaramos como variable global nuestro adaptador
    private MyInicioCartasItemRecyclerViewAdapter adapter;
    //Creamos una lista gobal de nuestra respuesta del servidor que contiene el modelo de nuestro json
    private List<ResponseCartas> cartasList;
    //Creamos una instancia a nuestra clase ViewModel que nos permitira recuperar la informacion y enviarla al adapter
    private CartasViewModel cartasViewModel;

    public InicioCartasItemFragment() {
    }

    @Override
    public void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        //Inicializamos nuestra clase ViewModel
        cartasViewModel = ViewModelProviders.of(getActivity()).get(CartasViewModel.class);
    }

    @Override
    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {
        View view = inflater.inflate(R.layout.fragment_inicio_cartas_item_list, container, false);
        // Set the adapter
        if (view instanceof RecyclerView) {
            Context context = view.getContext();
            recyclerView = (RecyclerView) view;

            if (mColumnCount <= 1) {
                recyclerView.setLayoutManager(new LinearLayoutManager(context));
            } else {
                recyclerView.setLayoutManager(new GridLayoutManager(context, mColumnCount));
            }
            adapter = new MyInicioCartasItemRecyclerViewAdapter(cartasList, getActivity());
            recyclerView.setAdapter(adapter);
            loadCartas();
        }

        return view;
    }

    //En este metodo debemos mandar a llamar al metodo de getListaCartas que se encuentra en nuestra clase ViewModel
    //a este metodo le pasaremos un observador que nos permitira pasar los datos una vez cargados a nuestro adaptador
    private void loadCartas() {
        cartasViewModel.getListaCartas().observe(getActivity(), new Observer<List<ResponseCartas>>() {
            @Override
            public void onChanged(List<ResponseCartas> responseCartas) {
                //a la lista que creamos en esta clase debemos igualarla a la lista que noes devuelve como respuesta nuestro servidor
                cartasList = responseCartas;
                //Una vez que rescuperamos la lista de cartas de servidor la enviamos a un metodo dentro de nuestra clase adapter
                adapter.setData(cartasList);
            }
        });
    }

}

I'm trying to make a search engine in a RecyclerView, the problem is that I already implemented all the necessary logic that I followed in a tutorial, but when I start writing in the SearchView it doesn't filter the content, I don't understand what I'm doing wrong, yes when I print the ArrayList where I am saving the results if I print the Array data in the console, the problem is that my views continue to see all the queried data.

This is my snippet where I implement the SearchView:

Convenios extends Fragment implements conveniosAdapter.OnEventMovieListener, Response.Listener<JSONObject>, Response.ErrorListener, SearchView.OnQueryTextListener{

    RecyclerView recyclerView;
    List<com.seccion.seccin15hibrida.model.Convenios> convenios;
    conveniosAdapter conveniosadapter;
    public static final String TAG = com.seccion.seccin15hibrida.model.Convenios.class.getName();

    RequestQueue request;
    JsonObjectRequest jsonObjectRequest;

    public Convenios(){

    }

    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState){

        View view = inflater.inflate(R.layout.convenios, container, false);
        recyclerView = (RecyclerView)view.findViewById(R.id.recycler_view);

        setHasOptionsMenu(true);

        convenios = new ArrayList<>();
        conveniosadapter = new conveniosAdapter(convenios);
        conveniosadapter.setOnEventMovieListener(this);
        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getContext());
        recyclerView.setLayoutManager(layoutManager);

        request = Volley.newRequestQueue(getActivity());
        cargarWebService();

        return view;
    }

    private void cargarWebService() {
        String url = "http://www.webservice.com/weblist.php/lista.php";
        jsonObjectRequest = new JsonObjectRequest(Request.Method.GET,url,null,this,this);
        request.add(jsonObjectRequest);
    }

    @Override
    public void onResponse(JSONObject response) {
        com.seccion.seccin15hibrida.model.Convenios pacto = null;
        JSONArray json = response.optJSONArray("convenio");

        try{
            for (int i=0; i<json.length(); i++){
                pacto = new com.seccion.seccin15hibrida.model.Convenios();
                JSONObject jsonObject = null;
                jsonObject = json.getJSONObject(i);

                pacto.setIdConvenio(jsonObject.optInt("idConvenio"));
                pacto.setTituloConvenio(jsonObject.optString("tituloConvenio"));
                pacto.setSubtituloConvenio(jsonObject.optString("subtituloConvenio"));
                pacto.setImagenConvenio(jsonObject.optString("imagenConvenio"));
                pacto.setVigenciaConvenio(jsonObject.optString("vigenciaConvenio"));
                pacto.setDescripcionConvenio(jsonObject.optString("descripcionConvenio"));
                pacto.setUrlConvenios(jsonObject.optString("linkConvenio"));
                convenios.add(pacto);
            }

            conveniosAdapter pactoAdapter = new conveniosAdapter(convenios);
            recyclerView.setAdapter(pactoAdapter);
            conveniosadapter.notifyDataSetChanged();

        }catch (JSONException e){
            Toast.makeText(getActivity(),"No hay ningun convenio para mostrar, intentalo mas tarde", Toast.LENGTH_LONG).show();
            e.printStackTrace();
        }
    }

    @Override
    public void onErrorResponse(VolleyError error) {
        Toast.makeText(getActivity(),"No se pudo consultar la informacion, intentalo nuevamente", Toast.LENGTH_LONG).show();
        Log.i("Error","No se pudo consultar la informacion, intentalo nuevamente");
    }

    @Override
    public void onCreateOptionsMenu(Menu menu, MenuInflater inflater) {

        super.onCreateOptionsMenu(menu, inflater);
        getActivity().getMenuInflater().inflate(R.menu.menu_busqueda, menu);
        MenuItem myActionMenuItem = menu.findItem(R.id.action_search);
        SearchView searchView = (SearchView)myActionMenuItem.getActionView();
        searchView.setOnQueryTextListener(this);

    }

    @Override
    public boolean onQueryTextSubmit(String s) {
        return false;
    }

    @Override
    public boolean onQueryTextChange(String s) {
        conveniosadapter.getFilter().filter(s);
        conveniosadapter.notifyDataSetChanged();
        return true;
    }
}

In fact, if I print what the onQueryTextChange(String s) function returns, it prints what I'm writing, and this is my adapter where I implement the search:

public class conveniosAdapter extends RecyclerView.Adapter<conveniosAdapter.ConveniosViewHolder> implements Filterable {

    List<Convenios> convenios;
    private List<Convenios> filteredList;
    private OnEventMovieListener onEventMovieListener;
    Context context;

    public conveniosAdapter(List<Convenios> convenios){
        this.convenios = convenios;
        this.filteredList = convenios;
    }

    @Override
    public ConveniosViewHolder onCreateViewHolder(ViewGroup parent, int typeView){

        View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_convenios, parent, false);
        conveniosAdapter.ConveniosViewHolder conveniosVH = new conveniosAdapter.ConveniosViewHolder(itemView, filteredList);
        context = parent.getContext();
        return conveniosVH;
    }

    @Override
    public void onBindViewHolder(ConveniosViewHolder holder, int position) {

        final Convenios conve = filteredList.get(position);

        holder.tituloConvenio.setText(conve.getTituloConvenio());
        holder.subtituloConvenio.setText(conve.getSubtituloConvenio());
        final String url = new String(conve.getImagenConvenio());
        if(url.isEmpty()){
            Picasso.with(context).load(R.drawable.nofound).into(holder.imagenConvenio);
        }else {
            Picasso.with(context).load(url).into(holder.imagenConvenio);
        }
        holder.vigenciaConvenio.setText(conve.getVigenciaConvenio());
        holder.urlConvenios.setText(conve.getUrlConvenios());
        holder.descripcionConvenio.setText(conve.getDescripcionConvenio());
    }

    @Override
    public int getItemCount() {
        return filteredList.size();
    }

    @Override
    public Filter getFilter() {
        return new Filter() {
            @Override
            protected FilterResults performFiltering(CharSequence charSequence) {

                String charString = charSequence.toString();

                if (charString.isEmpty()) {
                    Log.i("TEXTO","Consulta: "+charString);
                    filteredList = convenios;
                } else {

                    List<Convenios> newFilteredList = new ArrayList<>();

                    for (Convenios convenios : convenios) {
                        if (convenios.getTituloConvenio().toLowerCase().contains(charString)) {
                            newFilteredList.add(convenios);
                        }
                    }
                    filteredList = newFilteredList;
                    Log.i("FLY","Contenido: "+filteredList);
                }

                FilterResults filterResults = new FilterResults();
                filterResults.values = filteredList;
                return filterResults;
            }

            @Override
            protected void publishResults(CharSequence charSequence, FilterResults filterResults) {
                filteredList = (List<Convenios>) filterResults.values;
                notifyDataSetChanged();
            }
        };
    }

    public class ConveniosViewHolder extends RecyclerView.ViewHolder implements CompoundButton.OnCheckedChangeListener, View.OnClickListener{

        TextView tituloConvenio;
        TextView subtituloConvenio;
        ImageView imagenConvenio;
        TextView vigenciaConvenio;
        TextView urlConvenios;
        TextView descripcionConvenio;
        Button showConvenios;
        List<Convenios> convenios;

        public ConveniosViewHolder(View itemView, List<Convenios> convenios){
            super(itemView);
            this.convenios = convenios;
            tituloConvenio = (TextView)itemView.findViewById(R.id.tituloConvenio);
            subtituloConvenio = (TextView)itemView.findViewById(R.id.subtituloConvenio);
            imagenConvenio = (ImageView)itemView.findViewById(R.id.imagenConvenio);
            vigenciaConvenio = (TextView)itemView.findViewById(R.id.vigenciaConvenio);
            urlConvenios = (TextView)itemView.findViewById(R.id.urlConvenios);
            descripcionConvenio = (TextView) itemView.findViewById(R.id.descripcionConvenio);

            showConvenios = (Button)itemView.findViewById(R.id.showConvenios);
            showConvenios.setOnClickListener(this);

        }

        @Override
        public void onClick(View view) {
            switch(view.getId()){
                case R.id.showConvenios:
                    Convenios news = filteredList.get(getAdapterPosition());
                    Intent intent = new Intent(context, DescripcionConvenios.class);
                    intent.putExtra("url",news.getUrlConvenios());
                    intent.putExtra("titulo",news.getTituloConvenio());
                    context.startActivity(intent);
                    break;
                default:
                    break;
            }
        }

        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {

        }
    }

    public interface OnEventMovieListener{

    }

    public OnEventMovieListener getOnEventMovieListener() {
        return onEventMovieListener;
    }

    public void setOnEventMovieListener(OnEventMovieListener onEventMovieListener) {
        this.onEventMovieListener = onEventMovieListener;
    }
}

If I print what the For returns within the search function, which is this block:

for (Convenios convenios : convenios) {
                        if (convenios.getTituloConvenio().toLowerCase().contains(charString)) {
                            newFilteredList.add(convenios);
                        }
                    }
                    filteredList = newFilteredList;
                    Log.i("FLY","Contenido: "+filteredList);

This is what it prints for me:

2019-09-05 17:54:12.909 23578-23929/? I/FLY: Content: [com.seccion.seccion15hibrida.model.Convenios@58cec6f, com.seccion.seccion15hibrida.model.Convenios@9e4ad7c, com.seccion.seccion15hibrida.model.Convenios@d21d605] 2019-09-05 17: 54:15.684 23578-23932/? I/FLY: Content: [com.seccion.seccion15hibrida.model.Convenios@58cec6f] 2019-09-05 17:54:16.067 23578-23934/? I/FLY: Content: [com.seccion.seccion15hibrida.model.Convenios@58cec6f] 2019-09-05 17:54:16.312 23578-23936/? I/FLY: Content: [com.seccion.seccion15hibrida.model.Convenios@58cec6f] 2019-09-05 17:54:16.512 23578-23938/? I/FLY: Content: [com.seccion.seccion15hibrida.model.Convenios@58cec6f] 2019-09-05 17:54:18.193 23578-23941/? I/FLY: Content: [com.seccion.seccion15hibrida.model.Convenios@58cec6f] 2019-09-05 17:54:18.343 23578-23943/? I/FLY: Content: [com. section.seccion15hibrida.model.Convenios@58cec6f] 2019-09-05 17:54:18.579 23578-23945/? I/FLY: Content: [com.seccion.seccion15hibrida.model.Convenios@58cec6f]

What I understand are the results that are filtered but in my view all the results are seen. it doesn't update me or filter what i'm looking for

I have a problem when I recover a text string, it recovers fine but it has some HTML tags and characters that I don't want to show, for example, from the following text I only want to recover the link that is between the href, but I don't know how I can extract that fragment or how remove everything I don't need, I don't know if it is possible for android to interpret the HTML tags.

This is an example of how it returns the text strings, I just want to keep the link:

 <div><a
 href=\"https://sitioWeb.org.mx/wp-content/uploads/2018/06/documento.pdf\"
 class=\"pdfemb-viewer\" style=\"\" data-width=\"max\"

I have a problem with my Web Service, I am trying to obtain my values ​​that are stored in a database, but when I consult the web services from the browser it gives me the correct information which makes me think that the WbService already works, the problem is that now I want to consult it from an android application but it gives me this error:

Value Access of type java.lang.String cannot be converted to JSONObject

I don't understand this error, my Web Service is like this:

<?PHP
require( dirname(__FILE__) . '/wp-load.php' );

$hostname_localhost = "localhost";
$database_localhost = "prueba";
$username_localhost = "root";
$password_localhost = "";

$json=array();

    if(isset($_GET["name_usu"])){
        $nombre_usuario = $_GET["name_usu"];
        $password = $_GET["password"];

        include 'PasswordHash.php';

        echo $pass;

        $conexion = mysqli_connect($hostname_localhost, $username_localhost, $password_localhost, $database_localhost);
        mysqli_set_charset($conexion, "utf8");
        $consulta="SELECT ID, user, pass, nickname, email, url, fecha_registro, name_mostrar FROM usuarios WHERE user = '{$name_usu}'";
        $resultado=mysqli_query($conexion,$consulta);

        if($registro=mysqli_fetch_array($resultado)){



        $wp_hasher = new PasswordHash(8, true);   // 16 digit hashing password
        $pass = $wp_hasher->HashPassword($_POST['password']); //$posted['password'] is your password

        if($wp_hasher->CheckPassword( $password, $registro[2] )){
            echo "Acceso correcto";
            //Si todo funciona mandaremos la informacion a este array
            $json['sesion'][]=$registro;

        }else{
            echo "El usuario es incorrecto";
        }

        }else{
            $resultar["ID"]='No registrado';
            $resultar["user"]='No registrado';
            $resultar["pass"]='No registrado';
            $resultar["nickname"]='No registrado';
            $resultar["email"]='No registrado';
            $resultar["url"]='No registrado';
            $resultar["fecha_registro"]='No registrado';
            $resultar["name_mostrar"]='No registrado';
            $json['sesion'][]=$resultar;
        }

        mysqli_close($conexion);
        echo json_encode($json);

    }else{
        $resultar["success"]=0;
        $resultar["message"]='Ws no Retorna';
        $json['sesion'][]=$resultar;
        echo json_encode($json);
    }
?>

Successful access{"session":[{"0":"1757","ID":"1757","1":"testdb","user":"testdb","2":"$P$BhbEVMLV6onULEfYLG3dsF5xuv9t9j0 ","pass":"$P$BhbEVMLV6onULEfYLG3dsF5xuv9t9j0","3":"testdb","nickname":"testdb","4":"[email protected]","email":"dbtest@outlook. com","5":"","url":"","6":"2019-02-20 15:35:53","date_registration":"2019-02-20 15:35:53" ,"7":"enrique espinosa","display_name":"enrique espinosa"}]}

And in my application I have this in the OnResponde method and in the onErrorResponse:

@Override
    public void onResponse(JSONObject response) {

        JSONArray json = response.optJSONArray("sesion");
        JSONObject jsonObject = null;

        try{
            jsonObject = json.getJSONObject(0);
            ID = (jsonObject.getInt("ID"));
            user = (jsonObject.getString("user"));
            pass = (jsonObject.getString("pass"));
            //claveBD = (jsonObject.getString("clave"));
            nickname = (jsonObject.getString("nickname"));
            email = (jsonObject.getString("email"));
            url = (jsonObject.getString("url"));
            fecha_Registro = (jsonObject.getDouble("fecha_registro"));
            nombre_mostrar = (jsonObject.getString("nombre_mostrar"));
            //(jsonObject.getString("recordado"));

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

        if (nombreBD.equals("No registrado") || passwordBD.equals("No registrado")){
            Toast.makeText(getApplicationContext(), "Los datos son incorrectos", Toast.LENGTH_LONG).show();
        }else if(passwordBD.equals(passwordCaja)){

            registrarUsuario(nombreBD, passwordBD,"master",rolBD, empresaBD, box);

        }else {
            Toast.makeText(getApplicationContext(), "La contraseña es incorrecta", Toast.LENGTH_LONG).show();
        }
    }

    @Override
    public void onErrorResponse(VolleyError error) {
        Toast.makeText(getApplicationContext(), "Error al conectar al servidor: "+error, Toast.LENGTH_LONG).show();
        Log.i("servidor","Error de conexion: "+error);
        error.printStackTrace();
    }

In my WordPress database the passwords are saved as follows: $P$BhbEVMLV6onULEfYLG3dsF5xuv9t9j0

What I have not been able to do is compare that password against the one that the user enters in an EditText, I have tried to use the password_verify() function but it does not work, this is the code that I have to do a test but I don't know what I am doing wrong when doing the validation:

if(password_verify($password, '$P$BhbEVMLV6onULEfYLG3dsF5xuv9t9j0')){
            echo "Las contraseñas son correctas";
        }else{
            echo "No funciona la validacion";
        }

As far as I've researched WordPress uses this for passwords:

$wp_hasher = new PasswordHash(8, true);  
$pass = $wp_hasher->HashPassword($_POST['password']);

But I have already tried converting the password that the user enters to the same WordPress format but the validation does not work either.

I am trying to execute an Intent but it gives me an error when launching the Intent it shows me the following error:

Attempt to invoke virtual method 'java.lang.String android.content.Context.getPackageName()' on a null object reference

I don't know why this error happens when I call my intent, this is the method where I try to execute my intent:

public void vistaDetalle(String tituloNoticia, String subtituloNoticia, String imagenNoticia, String descripcionNoticia, Context context, Activity activity) {
        Intent intent = new Intent(getContext(), DescripcionNoticias.class);
        intent.putExtra("titulon",tituloNoticia);
        intent.putExtra("descripcionn", descripcionNoticia);
        intent.putExtra("imagen", imagenNoticia);
        startActivity(intent);
        getActivity().overridePendingTransition(R.anim.left_in, R.anim.left_out);
    }

I have already tried to use getActivity() and other methods but none works for me, this is the complete class:

public class Inicio extends Fragment implements noticiasAdapter.OnEventMovieListener, Response.Listener<JSONObject>, Response.ErrorListener{

    RecyclerView recyclerView;
    private List<Noticias> noticias;
    private noticiasAdapter noticiasadapter;
    public static final String TAG = Noticias.class.getName();

    RequestQueue request;
    JsonObjectRequest jsonObjectRequest;

    Context contextApp;

    public Inicio(){

    }

    @Override
    public void onAttach(Context context) {
        super.onAttach(context);
        this.contextApp = context;
    }

    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState){
        View view = inflater.inflate(R.layout.inicio, container, false);
        recyclerView = (RecyclerView)view.findViewById(R.id.recycler_view);

        noticias = new ArrayList<>();
        noticiasadapter = new noticiasAdapter(noticias);
        noticiasadapter.setOnEventMovieListener(this);
        RecyclerView.LayoutManager layoutManager = new LinearLayoutManager(getContext());
        recyclerView.setLayoutManager(layoutManager);

        request = Volley.newRequestQueue(getActivity());
        cargarWebService();

        return view;
    }

    private void cargarWebService() {

        String url = "http://192.168.1.81:80/webservicemgrex/listaNoticias.php";
        jsonObjectRequest = new JsonObjectRequest(Request.Method.GET,url,null,this,this);
        request.add(jsonObjectRequest);
    }

    @Override
    public void onResponse(JSONObject response) {
        Noticias news = null;
        JSONArray json = response.optJSONArray("inicio");

        try{
            for (int i=0; i<json.length(); i++){
                news = new Noticias();
                JSONObject jsonObject = null;
                jsonObject = json.getJSONObject(i);

                news.setIdNoticia(jsonObject.optInt("idNoticia"));
                news.setTituloNoticia(jsonObject.optString("tituloNoticia"));
                news.setSubtituloNoticia(jsonObject.getString("subtituloNoticia"));
                news.setImagenNoticia(jsonObject.getString("imagenNoticia"));
                news.setDescripcionNoticia(jsonObject.getString("descripcionNoticia"));
                noticias.add(news);
            }

            noticiasAdapter adapter = new noticiasAdapter(noticias);
            recyclerView.setAdapter(adapter);
            noticiasadapter.notifyDataSetChanged();

        }catch (JSONException e){
            Toast.makeText(getActivity(),"Error al cargar la informacion del servidor: "+e, Toast.LENGTH_LONG).show();
            e.printStackTrace();
        }
    }

    @Override
    public void onErrorResponse(VolleyError error) {
        Toast.makeText(getActivity(),"No se pudo consultar los registros: "+error.toString(), Toast.LENGTH_LONG).show();
        Log.i("Error","No se pudo consultar el registro: "+error.toString());
    }

    public void vistaDetalle(String tituloNoticia, String subtituloNoticia, String imagenNoticia, String descripcionNoticia, Context context, Activity activity) {
        Intent intent = new Intent(getContext(), DescripcionNoticias.class);
        intent.putExtra("titulon",tituloNoticia);
        intent.putExtra("descripcionn", descripcionNoticia);
        intent.putExtra("imagen", imagenNoticia);
        startActivity(intent);
        getActivity().overridePendingTransition(R.anim.left_in, R.anim.left_out);
    }


    @Override
    public void onStop() {
        super.onStop();
    }

    @Override
    public void onResume() {
        super.onResume();
    }

    @Override
    public void onPause() {
        super.onPause();
    }

    @Override
    public void onDestroy() {
        super.onDestroy();
    }

}

This is my class from where I call it, when the onclick is executed I try to call my ViewDetail method:

public class noticiasAdapter extends RecyclerView.Adapter<noticiasAdapter.NoticiasViewHolder> {

    private List<Noticias> noticias;
    private OnEventMovieListener onEventMovieListener;
    private Context context;
    public Activity activity;

    public interface OnEventMovieListener{
       }

    public class NoticiasViewHolder extends RecyclerView.ViewHolder implements CompoundButton.OnCheckedChangeListener, View.OnClickListener {

        TextView tituloNoticia;
        TextView subtituloNoticia;
        ImageView imagenNoticia;
        TextView descripcionNoticia;
        FloatingActionButton favoritos;
        Button showMore;
        private int contador = 0;

        public NoticiasViewHolder(View itemView){
            super(itemView);

            tituloNoticia = (TextView)itemView.findViewById(R.id.tituloNoticia);
            subtituloNoticia = (TextView)itemView.findViewById(R.id.subtituloNoticia);
            imagenNoticia = (ImageView)itemView.findViewById(R.id.imagenNotica);
            descripcionNoticia = (TextView)itemView.findViewById(R.id.descripcionNoticias);

            favoritos = (FloatingActionButton)itemView.findViewById(R.id.floatingActionButton);
            favoritos.setOnClickListener(this);

            showMore = (Button)itemView.findViewById(R.id.showMore);
            showMore.setOnClickListener(this);

        }

        @Override
        public void onClick(View view) {
            switch(view.getId()){
                case R.id.floatingActionButton:
                    if (contador == 0){
                        favoritos.setImageResource(R.drawable.likedcolor);
                        contador = contador + 1;
                        Noticias fav = noticias.get(getAdapterPosition());
                        noticiasWebService noti = new noticiasWebService();
                        noti.update(fav.getTituloNoticia(), fav.getSubtituloNoticia(), fav.getImagenNoticia(), fav.getDescripcionNoticia(), context);
                        Toast.makeText(context, "Se añadio a tus favoritos ", Toast.LENGTH_LONG).show();
                    }else if (contador == 1){
                        favoritos.setImageResource(R.drawable.unliked);
                        contador = contador - 1;
                        Noticias fav = noticias.get(getAdapterPosition());
                        noticiasWebService noti = new noticiasWebService();
                        noti.deleteRegistro(fav.getTituloNoticia(), context);
                        Toast.makeText(context, "Se elimino de tus favoritos", Toast.LENGTH_LONG).show();

                    }
                    break;
                case R.id.showMore:
                    Noticias news = noticias.get(getAdapterPosition());
                    Inicio inicio = new Inicio();
                    inicio.vistaDetalle(news.getTituloNoticia(), news.getSubtituloNoticia(), news.getImagenNoticia(), news.getDescripcionNoticia(),context, activity );
                    break;
                default:
                    break;
            }
        }

        @Override
        public void onCheckedChanged(CompoundButton compoundButton, boolean b) {

        }
    }

    public noticiasAdapter(List<Noticias> noticias){
        this.noticias = noticias;
    }

    @Override
    public NoticiasViewHolder onCreateViewHolder(ViewGroup parent, int viewType){
        View itemView = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_noticias, parent, false);
        context = parent.getContext();
        return new NoticiasViewHolder(itemView);
    }

    @Override
    public void onBindViewHolder(NoticiasViewHolder holder, int position){

        Noticias news = noticias.get(position);

        holder.tituloNoticia.setText(news.getTituloNoticia());
        holder.subtituloNoticia.setText(news.getSubtituloNoticia());
        final String url = new String(news.getImagenNoticia());
        if(url.isEmpty()){
            Picasso.with(context).load(R.drawable.nofound).into(holder.imagenNoticia);
        }else {
            Picasso.with(context).load(url).into(holder.imagenNoticia);
        }
        holder.descripcionNoticia.setText(news.getDescripcionNoticia());

    }

    @Override
    public int getItemCount(){
        return noticias.size();
    }

    public OnEventMovieListener getOnEventMovieListener() {
        return onEventMovieListener;
    }

    public void setOnEventMovieListener(OnEventMovieListener onEventMovieListener){
        this.onEventMovieListener = onEventMovieListener;
    }
}

and this is the method:

 case R.id.showMore:
                    Noticias news = noticias.get(getAdapterPosition());
                    Inicio inicio = new Inicio();
                    inicio.vistaDetalle(news.getTituloNoticia(), news.getSubtituloNoticia(), news.getImagenNoticia(), news.getDescripcionNoticia(),context, activity );
                    break;
                default:
                    break;

This is the class I am trying to call NewsDescription.class:

public class NewsDescription extends AppCompatActivity {

TextView tituloNoticiaDescripcion;
TextView noticiaCompleta;
ImageView imagenNoticiaCompleta;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_descripcion_noticias);

    //Toolbar de la aplicacion en la vista principal
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);
    toolbar.setTitle("Sección 15");
    toolbar.setSubtitle("Nota completa");

    getSupportActionBar().setDisplayHomeAsUpEnabled(true);

    String tituloNoticia = getIntent().getExtras().getString("titulon");
    String descripcionNoticia = getIntent().getExtras().getString("descripcionn");
    String imagenNoticia = getIntent().getExtras().getString("imagen");

    tituloNoticiaDescripcion = (TextView)findViewById(R.id.tituloDesNoticia);
    noticiaCompleta = (TextView)findViewById(R.id.noticiaCompleta);
    imagenNoticiaCompleta = (ImageView)findViewById(R.id.imagenNoticiaCompleta);

    tituloNoticiaDescripcion.setText(tituloNoticia);
    noticiaCompleta.setText(descripcionNoticia);
    imagenNoticiaCompleta.setImageResource(R.drawable.noticiauno);

}

@Override
public boolean onOptionsItemSelected(MenuItem item) {
    switch (item.getItemId()) {
        case android.R.id.home:
            overridePendingTransition(R.anim.left_out, R.anim.left_in);
            onBackPressed();
            return true;
    }

    return super.onOptionsItemSelected(item);
}

}

This is the full error:

I am doing an exercise where I connect my application with an external database, I can now retrieve text stored in a MySQL database, I have a field called photo, it is a "varchar" and there I store a URL the problem is that when I load the image in ImageView I use the following code:

try {
            URL url = new URL(listaUsuario.get(position).getFoto().toString());
            Bitmap image = 

    BitmapFactory.decodeStream(url.openConnection().getInputStream());
                usuariosHolder.fotoUsuario.setImageBitmap(image);
            } catch (MalformedURLException e) {
                Log.i("Rashomu","Error: "+e);
                e.printStackTrace();
            } catch (IOException e) {
                Log.i("Raiton","Error: "+e);
                e.printStackTrace();
            }

The problem is that it gives me the following error:

6026-6026/com.example.enriq.myapplication E/AndroidRuntime: FATAL EXCEPTION: main Process: com.example.enriq.myapplication, PID: 6026 android.os.NetworkOnMainThreadException

My application stops with this error, from what I have read it is an Asynchronous task error, I just don't know how to load the images with asynchronous tasks, I am doing everything from a recycler view with card views.

This is the complete code of my adapter:

public class UsuariosAdapter extends RecyclerView.Adapter<UsuariosAdapter.UsuariosHolder> {

    List<Usuario> listaUsuario;

    public UsuariosAdapter(List<Usuario> listaUsuario){
        this.listaUsuario = listaUsuario;
    }

    @Override
    public UsuariosAdapter.UsuariosHolder onCreateViewHolder(ViewGroup parent, int viewType) {
        View view = LayoutInflater.from(parent.getContext()).inflate(R.layout.item_usuarios,parent,false);
        RecyclerView.LayoutParams layoutParams = new RecyclerView.LayoutParams(ViewGroup.LayoutParams.MATCH_PARENT,
                ViewGroup.LayoutParams.WRAP_CONTENT);
        view.setLayoutParams(layoutParams);
        return new UsuariosHolder(view);
    }

    @Override
    public void onBindViewHolder( UsuariosAdapter.UsuariosHolder usuariosHolder, int position) {

        usuariosHolder.nombreRecuperado.setText(listaUsuario.get(position).getNombre());
        usuariosHolder.apellidoRecuperado.setText(listaUsuario.get(position).getApellido());
        usuariosHolder.direccionRecuperado.setText(listaUsuario.get(position).getDireccion());
        usuariosHolder.fotoRecuperado.setText(listaUsuario.get(position).getFoto());

        try {
            URL url = new URL(listaUsuario.get(position).getFoto().toString());
            Bitmap image = BitmapFactory.decodeStream(url.openConnection().getInputStream());
            usuariosHolder.fotoUsuario.setImageBitmap(image);
        } catch (MalformedURLException e) {
            Log.i("Rashomu","Error: "+e);
            e.printStackTrace();
        } catch (IOException e) {
            Log.i("Raiton","Error: "+e);
            e.printStackTrace();
        }


    }

    @Override
    public int getItemCount() {
        return listaUsuario.size();
    }

    public class UsuariosHolder extends RecyclerView.ViewHolder{

        TextView nombreRecuperado, apellidoRecuperado, direccionRecuperado, fotoRecuperado;
        ImageView fotoUsuario;

        public UsuariosHolder(View itemView){
            super(itemView);

            nombreRecuperado = (TextView)itemView.findViewById(R.id.tituloUsuario);
            apellidoRecuperado = (TextView)itemView.findViewById(R.id.apellidoUsuario);
            fotoRecuperado = (TextView)itemView.findViewById(R.id.imagenUsuario);
            direccionRecuperado = (TextView)itemView.findViewById(R.id.direccionUsuario);
            fotoUsuario = (ImageView)itemView.findViewById(R.id.fotoUsuario);
        }
    }
}

This is my User class where I have all the get and set:

package com.example.enriq.myapplication.Entidades;

public class Usuario {

    private String nombre;
    private String apellido;
    private String direccion;
    private String foto;



    public String getNombre() {
        return nombre;
    }

    public void setNombre(String nombre) {
        this.nombre = nombre;
    }

    public String getApellido() {
        return apellido;
    }

    public void setApellido(String apellido) {
        this.apellido = apellido;
    }

    public String getDireccion() {
        return direccion;
    }

    public void setDireccion(String direccion) {
        this.direccion = direccion;
    }

    public String getFoto() {
        return foto;
    }

    public void setFoto(String foto) {
        this.foto = foto;
    }
}

And finally this is my main class where I retrieve the information from my database with JSON:

public class ConsultarLista extends AppCompatActivity implements Response.Listener<JSONObject>, Response.ErrorListener {

    RecyclerView recyclerView;
    ArrayList<Usuario> listaUsuario;

    RequestQueue request;
    JsonObjectRequest jsonObjectRequest;

    public ConsultarLista() {
    }

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_consultar_lista);

        listaUsuario = new ArrayList<>();
        recyclerView = (RecyclerView)findViewById(R.id.recyclerviewU);
        recyclerView.setLayoutManager(new LinearLayoutManager(this.getApplicationContext()));
        recyclerView.setHasFixedSize(true);

        request = Volley.newRequestQueue(getApplicationContext());

        cargarWebService();
    }

    private void cargarWebService() {

        String url = "http://192.168.1.81:80/webservice/consultarLista.php";
        jsonObjectRequest = new JsonObjectRequest(Request.Method.GET,url,null,this,this);
        request.add(jsonObjectRequest);
    }

    @Override
    public void onResponse(JSONObject response) {
        Usuario usuario = null;
        JSONArray json = response.optJSONArray("usuario");

        try{

        for (int i=0; i<json.length(); i++){
            usuario = new Usuario();
            JSONObject jsonObject = null;
            jsonObject = json.getJSONObject(i);

            usuario.setNombre(jsonObject.optString("nombre"));
            usuario.setApellido(jsonObject.optString("apellido"));
            usuario.setDireccion(jsonObject.optString("direccion"));
            usuario.setFoto(jsonObject.optString("foto"));
            listaUsuario.add(usuario);
        }

            UsuariosAdapter adapter = new UsuariosAdapter(listaUsuario);
            recyclerView.setAdapter(adapter);

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

    }

    @Override
    public void onErrorResponse(VolleyError error) {
        Toast.makeText(getApplicationContext(),"No se pudo consultar los registros: "+error.toString(), Toast.LENGTH_LONG).show();
        Log.i("Error","No se pudo consultar el registro: "+error.toString());
    }
}

I am working on an application where I want to show youtube videos in a fragment that has CardsViews, my cardviews already work without problem, the problem is that the videos do not play, I always get an error:

I am adding the videos in a WebView and I use the video links as follows: http://www.youtube.com/embed/ \"+yS_p_ICLUAw+\"?autoplay=1&vq=small

The WebView configuration is as follows:

holder.reproductor.loadUrl(tips.getEnlace());
        holder.reproductor.getSettings().setJavaScriptEnabled(true);
        holder.reproductor.setWebViewClient(new WebViewClient(){

            @Override
            public void onPageStarted(WebView view, String url, Bitmap favicon) {
                super.onPageStarted(view, url, favicon);
            }

            @Override
            public void onPageFinished(WebView view, String url) {
                super.onPageFinished(view, url);
            }
        });
        holder.reproductor.setWebChromeClient(new WebChromeClient(){
            @Override
            public void onProgressChanged(WebView view, int newProgress) {
                super.onProgressChanged(view, newProgress);
            }

            @Override
            public void onReceivedTitle(WebView view, String title) {
                super.onReceivedTitle(view, title);
            }
        });

This is the error that shows with the URL that I put in the WebView:

I am trying to make an animation for an image, but the problem is that the animation is not running, it does not show any error, I put my image that I want to animate in a class that extends from Fragment .

This is my class that extends from Fragment:

public class animacionesFrgmento extends Fragment {

    public FloatingActionButton reproductor;

    public  animacionesFrgmento(){

    }

    public View onCreateView(LayoutInflater inflater, ViewGroup container,
                             Bundle savedInstanceState) {

        View view = inflater.inflate(R.layout.activity_animaciones, container, false);
        reproductor = (FloatingActionButton) view.findViewById(R.id.floatingActionButton);
        reproductor.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                PlayAnimation(view);
            }
        });
        return view;
    }

    public void PlayAnimation(View view){

        Toast.makeText(getActivity(), "Reproduciendo animacion", Toast.LENGTH_LONG).show();
        ImageView esfera = (ImageView)view.findViewById(R.id.esfera);
        AnimatorSet animatorSet = (AnimatorSet) AnimatorInflater.loadAnimator(getActivity(), R.animator.animation_esfera);
        animatorSet.setTarget(esfera);
        animatorSet.start();

    }
}

This is my XML animation file, it is in a folder called "animator"

<?xml version="1.0" encoding="UTF-8"?>
<set android:ordering="together" xmlns:android="http://schemas.android.com/apk/res/android">

    <objectAnimator
        android:propertyName="x"
        android:duration="400"
        android:valueTo="500"/>

    <objectAnimator
        android:propertyName="y"
        android:duration="400"
        android:valueTo="500"/>

</set>

This is my file where I have my floating button and my ImageView:

<?xml version="1.0" encoding="utf-8"?>
<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:app="http://schemas.android.com/apk/res-auto"
    android:layout_width="match_parent" android:layout_height="match_parent">

    <ImageView
        android:id="@+id/esfera"
        android:layout_width="200dp"
        android:layout_height="200dp"
        android:layout_alignParentLeft="true"
        android:layout_alignParentStart="true"
        android:layout_alignParentTop="true"
        android:layout_marginTop="12dp"
        android:src="@drawable/esfera" />

    <android.support.design.widget.FloatingActionButton
        android:id="@+id/floatingActionButton"
        android:layout_width="wrap_content"
        android:layout_height="wrap_content"
        android:layout_alignParentBottom="true"
        android:layout_centerHorizontal="true"
        android:layout_marginBottom="40dp"
        android:clickable="true"
        app:srcCompat="@android:drawable/ic_media_play" />

</RelativeLayout>

I am printing a Toast in my method where I try to execute the animation and the message is displayed, but the animation does nothing, the emulator where I run the project is an emulator with API 25

I have a question, I am starting to work with Ajax and PHP and I want to know how I can login with Ajax so that it validates the user if he is registered or not, I have my users in a MySQL database but I don't know how to do that validation.