Android - Visualizar Datos de Async-http en RecyclerView

import android.os.Bundle;

import android.support.design.widget.FloatingActionButton;

import android.support.design.widget.Snackbar;

import android.support.v4.app.Fragment;

import android.view.View;

import android.support.design.widget.NavigationView;

import android.support.v4.view.GravityCompat;

import android.support.v4.widget.DrawerLayout;

import android.support.v7.app.ActionBarDrawerToggle;

import android.support.v7.app.AppCompatActivity;

import android.support.v7.widget.Toolbar;

import android.view.Menu;

import android.view.MenuItem;

import android.widget.Toast;

import com.loopj.android.http.AsyncHttpClient;

import com.loopj.android.http.AsyncHttpResponseHandler;

import com.loopj.android.http.RequestParams;

import org.json.JSONArray;

import java.util.ArrayList;

import cz.msebera.android.httpclient.Header;

public class Principal extends AppCompatActivity

        implements NavigationView.OnNavigationItemSelectedListener {

    @Override

    protected void onCreate(Bundle savedInstanceState) {

        super.onCreate(savedInstanceState);

        setContentView(R.layout.activity_principal);

        Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);

        setSupportActionBar(toolbar);

        FloatingActionButton fab = (FloatingActionButton) findViewById(R.id.fab);

        fab.setOnClickListener(new View.OnClickListener() {

            @Override

            public void onClick(View view) {

                Snackbar.make(view, "Replace with your own action", Snackbar.LENGTH_LONG)

                        .setAction("Action", null).show();

            }

        });

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);

        ActionBarDrawerToggle toggle = new ActionBarDrawerToggle(

                this, drawer, toolbar, R.string.navigation_drawer_open, R.string.navigation_drawer_close);

        drawer.setDrawerListener(toggle);

        toggle.syncState();

        NavigationView navigationView = (NavigationView) findViewById(R.id.nav_view);

        navigationView.setNavigationItemSelectedListener(this);

        Fragment fragment=null;

        Boolean FragSelc=true;

        fragment=new Fragment_Inicio();

        getSupportFragmentManager().beginTransaction().replace(R.id.contenedor,fragment).commit();

        ObtenerDatos();

    }

    private void ObtenerDatos() {

        AsyncHttpClient asyncHttpClient=new AsyncHttpClient();

        String url="http://pracjesuskat.esy.es/Mi_Pal_APP/Android/Usuario_Final/Consulta_General.php";

        RequestParams requestParams=new RequestParams();

        asyncHttpClient.get(url, requestParams, new AsyncHttpResponseHandler() {

            @Override

            public void onSuccess(int statusCode, Header[] headers, byte[] responseBody) {

                if(statusCode==200){

                    if(obtDatosJSON(new String(responseBody)).isEmpty()){

                        Toast.makeText(Principal.this,"No se Cargaron los Productos",Toast.LENGTH_LONG).show();

                    }else {

                        BeanProductos beanProductos=new BeanProductos();

                        beanProductos.setProductos(obtDatosJSON(new String(responseBody)));

                    }

                }

            }

            @Override

            public void onFailure(int statusCode, Header[] headers, byte[] responseBody, Throwable error) {

            }

        });

    }

    public ArrayList<String> obtDatosJSON(String response){

        ArrayList<String> listado=new ArrayList<String>();

        try{

            JSONArray jsonArray=new JSONArray(response);

            String producto;

            for(int i=0;i<jsonArray.length();i++){

                producto=jsonArray.getJSONObject(i).getString("mar_nom")+

                        jsonArray.getJSONObject(i).getString("pro_descripcion")+

                        jsonArray.getJSONObject(i).getString("pro_precio")+

                        jsonArray.getJSONObject(i).getString("pro_cod");

                listado.add(producto);

            }

        }catch (Exception e){

            e.printStackTrace();

        }

        return listado;

    }

    @Override

    public void onBackPressed() {

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);

        if (drawer.isDrawerOpen(GravityCompat.START)) {

            drawer.closeDrawer(GravityCompat.START);

        } else {

            super.onBackPressed();

        }

    }

    @Override

    public boolean onCreateOptionsMenu(Menu menu) {

        // Inflate the menu; this adds items to the action bar if it is present.

        getMenuInflater().inflate(R.menu.principal, menu);

        return true;

    }

    @Override

    public boolean onOptionsItemSelected(MenuItem item) {

        // Handle action bar item clicks here. The action bar will

        // automatically handle clicks on the Home/Up button, so long

        // as you specify a parent activity in AndroidManifest.xml.

        int id = item.getItemId();

        //noinspection SimplifiableIfStatement

        if (id == R.id.action_settings) {

            return true;

        }

        return super.onOptionsItemSelected(item);

    }

    @SuppressWarnings("StatementWithEmptyBody")

    @Override

    public boolean onNavigationItemSelected(MenuItem item) {

        // Handle navigation view item clicks here.

        int id = item.getItemId();

        Fragment fragment=null;

        Boolean FragSelc=false;

        if (id == R.id.nav_inicio) {

            // Handle the camera action

            fragment=new Fragment_Inicio();

            getSupportFragmentManager().beginTransaction().replace(R.id.contenedor,fragment).commit();

            FragSelc=true;

        } else if (id == R.id.nav_zapatilla) {

            fragment=new Fragment_Zapatilla();

            getSupportFragmentManager().beginTransaction().replace(R.id.contenedor,fragment).commit();

            FragSelc=true;

        } else if (id == R.id.nav_cartera) {

            fragment=new Fragment_Cartera();

            getSupportFragmentManager().beginTransaction().replace(R.id.contenedor,fragment).commit();

            FragSelc=true;

        } else if (id == R.id.nav_ropa) {

            fragment=new Fragment_Ropa();

            getSupportFragmentManager().beginTransaction().replace(R.id.contenedor,fragment).commit();

            FragSelc=true;

        } else if (id == R.id.nav_accesorio) {

            fragment=new Fragment_Accesorios();

            getSupportFragmentManager().beginTransaction().replace(R.id.contenedor,fragment).commit();

            FragSelc=true;

        } else if (id == R.id.nav_share) {

        } else if (id == R.id.nav_send) {

        }

        DrawerLayout drawer = (DrawerLayout) findViewById(R.id.drawer_layout);

        drawer.closeDrawer(GravityCompat.START);

        return true;

    }

}

<?xml version="1.0" encoding="utf-8"?>

<RelativeLayout xmlns:android="http://schemas.android.com/apk/res/android"

    android:orientation="vertical" android:layout_width="match_parent"

    android:layout_height="match_parent">

    <LinearLayout

        android:layout_width="match_parent"

        android:layout_height="match_parent"

        android:orientation="vertical">

        <ImageView

            android:id="@+id/Imagen"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_margin="12dp" />

        <TextView

            android:id="@+id/Marca"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_alignParentLeft="true"

            android:layout_alignParentStart="true"

            android:layout_below="@+id/Titulo"

            android:layout_marginTop="16dp"

            android:text="Marca" />

        <TextView

            android:id="@+id/Titulo"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_alignParentLeft="true"

            android:layout_alignParentStart="true"

            android:layout_below="@+id/Imagen"

            android:layout_marginTop="61dp"

            android:text="Titulo" />

        <TextView

            android:id="@+id/Precio"

            android:layout_width="match_parent"

            android:layout_height="wrap_content"

            android:layout_alignEnd="@+id/textView6"

            android:layout_alignRight="@+id/textView6"

            android:layout_below="@+id/textView6"

            android:layout_marginTop="33dp"

            android:text="Precio" />

    </LinearLayout>

</RelativeLayout>