Problem getting JSON from a page with android studios

Good I'm trying to get the json of a page but instead I get all the html

  

android studios program

import android.app.ProgressDialog;
import android.app.SearchManager;
import android.content.Intent;
import android.os.AsyncTask;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
import android.util.Log;
import android.view.View;
import android.widget.Button;
import android.widget.EditText;
import android.widget.Toast;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.MalformedURLException;
import java.net.URL;

public class MainActivity extends AppCompatActivity {

    EditText campo_nombre_pj;
    Button btn_buscar_pj;
    String cosaBuscar = "";
    String mask_http = "https://playoverwatch.com/es-es/heroes/";
    ProgressDialog pd;

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

        campo_nombre_pj = findViewById(R.id.campo_nombre_pj);
        btn_buscar_pj = findViewById(R.id.btn_buscar_pj);


        btn_buscar_pj.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                if (campo_nombre_pj.getText().toString().trim().length() > 1) {
                    String nombrepj = campo_nombre_pj.getText().toString();
                cosaBuscar = nombrepj;
                 //   Intent intent = new Intent(Intent.ACTION_WEB_SEARCH);
              /*         Intent intent = new Intent(Intent.ACTION_USER_BACKGROUND);

                    intent.putExtra(SearchManager.QUERY, " https://playoverwatch.com/es-es/heroes/"+nombrepj+"/");
                    startActivity(intent);
*/
                    new JsonTask().execute(mask_http+nombrepj);

                } else {
                    Toast.makeText(MainActivity.this, "Campo vacio..!!", Toast.LENGTH_SHORT).show();
                }
            }
        });








    }


    private class JsonTask extends AsyncTask<String, String, String> {

        protected void onPreExecute() {
            super.onPreExecute();

            pd = new ProgressDialog(MainActivity.this);
            pd.setMessage("Please wait");
            pd.setCancelable(false);
            pd.show();
        }

        protected String doInBackground(String... params) {


            HttpURLConnection connection = null;
            BufferedReader reader = null;

            try {
                URL url = new URL(params[0]);
                connection = (HttpURLConnection) url.openConnection();
                connection.connect();


                InputStream stream = connection.getInputStream();

                reader = new BufferedReader(new InputStreamReader(stream));

                StringBuffer buffer = new StringBuffer();
                String line = "";

                while ((line = reader.readLine()) != null) {
                    buffer.append(line+"\n");
                    Log.d("Response: ", "> " + line);   //here u ll get whole response...... :-)

                }

                return buffer.toString();


            } catch (MalformedURLException e) {
                e.printStackTrace();
            } catch (IOException e) {
                e.printStackTrace();
            } finally {
                if (connection != null) {
                    connection.disconnect();
                }
                try {
                    if (reader != null) {
                        reader.close();
                    }
                } catch (IOException e) {
                    e.printStackTrace();
                }
            }
            return null;
        }

        @Override
        protected void onPostExecute(String result) {
            super.onPostExecute(result);
            if (pd.isShowing()){
                pd.dismiss();
            }
            System.out.println("Resultado : "+result);
        }
    }
}

  

But he returns this to me

'

06-01 16:05:48.186 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > <!DOCTYPE html><html lang="es-es"><head><link rel="icon" type="image/x-icon" href="https://d3hmvhl7ru3t12.cloudfront.net/img/favicon-bb6200267bbdea6fdc9eb498a88722007dad6eb3b3c6437440025c66cb055fefdd1fbedf3886bd069fc3547c79fa8afee4795a278a644f6cfe10a7b1144f48bb.ico"><title>Doomfist - Héroes - Overwatch</title><meta charset="utf-8"><meta http-equiv="X-UA-Compatible" content="IE=edge"><meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no"><meta itemprop="name" content="Doomfist - Overwatch"><meta itemprop="description" content="Doomfist es un estratega que utiliza su inteligencia, carisma y fuerza bruta para hacer que el mundo evolucione."><meta itemprop="image" content="https://d3hmvhl7ru3t12.cloudfront.net/img/share/heroes-c08aa560b2f9c15ffaaa5f81446e8902734065ba71b1251af24e150857bc2f8d57bea402102296978eacde2577a33bafe813511f382c330356ce33f4204405ed.jpg"><link rel="canonical" href="https://playoverwatch.com/es-es/heroes/doomfist"><!--Opengraph Tags - http://ogp.me/--><meta property="og:type" content="website"><meta property="og:site_name" content="Overwatch"><meta property="og:locale" content="es_ES"><meta property="og:title" content="Doomfist - Overwatch"><meta property="og:description" content="Doomfist es un estratega que utiliza su inteligencia, carisma y fuerza bruta para hacer que el mundo evolucione."><meta property="og:image" content="https://d3hmvhl7ru3t12.cloudfront.net/img/share/heroes-c08aa560b2f9c15ffaaa5f81446e8902734065ba71b1251af24e150857bc2f8d57bea402102296978eacde2577a33bafe813511f382c330356ce33f4204405ed.jpg"><meta property="og:url" content="https://playoverwatch.com/es-es/heroes/doomfist"><script type='text/javascript'>window.NREUM||(NREUM={});NREUM.info = {"agent":"","beacon":"bam.nr-data.net","errorBeacon":"bam.nr-data.net","licenseKey":"fbd2e57ca0","applicationID":"57833303","applicationTime":14.391382,"transactionName":"b1NWY0MFDUpQWxIIXVYZcU9BFgZKQlIVTnV9YhsYWQERVlRLSVtbXA==","queueTime":0,"ttGuid":"726ed206e6fff0","agentToken":null}; (window.NREUM||(NREUM={})).loader_config={xpid:"VQEHV1RWCRAFU1lRBAIHVQ=="};window.NREUM||(NREUM={}),__nr_require=function(t,e,n){function r(n){if(!e[n]){var o=e[n]={exports:{}};t[n][0].call(o.exports,function(e){var o=t[n][1][e];return r(o||e)},o,o.exports)}return e[n].exports}if("function"==typeof __nr_require)return __nr_require;for(var o=0;o<n.length;o++)r(n[o]);return r}({1:[function(t,e,n){function r(t){try{c.console&&console.log(t)}catch(e){}}var o,i=t("ee"),a=t(20),c={};try{o=localStorage.getItem("__nr_flags").split(","),console&&"function"==typeof console.log&&(c.console=!0,o.indexOf("dev")!==-1&&(c.dev=!0),o.indexOf("nr_dev")!==-1&&(c.nrDev=!0))}catch(s){}c.nrDev&&i.on("internal-error",function(t){r(t.stack)}),c.dev&&i.on("fn-err",function(t,e,n){r(n.stack)}),c.dev&&(r("NR AGENT IN DEVELOPMENT MODE"),r("flags: "+a(c,function(t,e){return t}).join(", ")))},{}],2:[function(t,e,n){function r(t,e,n,r,c){try{h?h-=1:o(c||new UncaughtException(t,e,n),!0)}catch(f){try{i("ierr",[f,s.now(),!0])}catch(d){}}return"function"==typeof u&&u.apply(this,a(arguments))}function UncaughtException(t,e,n){this.message=t||"Uncaught error with no additional information",this.sourceURL=e,this.line=n}function o(t,e){var n=e?null:s.now();i("err",[t,n])}var i=t("handle"),a=t(21),c=t("ee"),s=t("loader"),f=t("gos"),u=window.onerror,d=!1,p="nr@seenError",h=0;s.features.err=!0,t(1),window.onerror=r;try{throw new Error}catch(l){"stack"in l&&(t(13),t(12),"addEventListener"in window&&t(6),s.xhrWrappable&&t(14),d=!0)}c.on("fn-start",function(t,e,n){d&&(h+=1)}),c.on("fn-err",function(t,e,n){d&&!n[p]&&(f(n,p,function(){return!0}),this.thrown=!0,o(n))}),c.on("fn-end",function(){d&&!this.thrown&&h>0&&(h-=1)}),c.on("internal-error",function(t){i("ierr",[t,s.now(),!0])})},{}],3:[function(t,e,n){t("loader").features.ins=!0},{}],4:[function(t,e,n){function r(){M++,S=y.hash,this[u]=b.now()}function o(){M--,y.hash!==S&&i(0,!0);var t=b.now();this[l]=~~this[l]+t-this[u],this[d]=t}function i(t,e){E.emit("newURL",[""+y,e])}function a(
06-01 16:05:48.186 19445-19710/com.example.josel.inspiracion_manolo D/Response:: >     background-image:url(https://d1u1mce87gyfbn.cloudfront.net/hero/doomfist/background-story.jpg);
06-01 16:05:48.186 19445-19710/com.example.josel.inspiracion_manolo D/Response:: >     background-color:;
06-01 16:05:48.186 19445-19710/com.example.josel.inspiracion_manolo D/Response:: >     
06-01 16:05:48.186 19445-19710/com.example.josel.inspiracion_manolo D/Response:: >     background-position: 80% top;
06-01 16:05:48.186 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > }
06-01 16:05:48.186 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > .hero-pose-image {
06-01 16:05:48.186 19445-19710/com.example.josel.inspiracion_manolo D/Response:: >     background-image:url(https://d1u1mce87gyfbn.cloudfront.net/hero/doomfist/full-portrait.png);
06-01 16:05:48.186 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > }
06-01 16:05:48.186 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > </style><script src="https://cdn.optimizely.com/js/8304241110.js"></script><script>var clientVars = {"language":"es","urlLocale":"es-es","locale":"es_ES","loggedIn":false,"region":"us","serverRegion":"us","codeFile":"https://d3hmvhl7ru3t12.cloudfront.net/video/dva-code-3782ae17f615dbd4de7063d9b08bddeea7c756ce8992e3de89ccbb620e00c4df2afd6a9009f0334098dd681fc61fa785be5d6c2dea448482eb93d914cd18fc54.mp3"};
06-01 16:05:48.186 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > 
06-01 16:05:48.186 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > window.blizzard = window.blizzard || {};
06-01 16:05:48.186 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > Object.keys(clientVars).forEach(function(key) {
06-01 16:05:48.186 19445-19710/com.example.josel.inspiracion_manolo D/Response:: >     window.blizzard[key] = clientVars[key];
06-01 16:05:48.186 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > });</script></head><body itemscope="itemscope" itemtype="http://schema.org/WebPage" class="hero-detail-page es-es"><script>var dataLayer = dataLayer || [];
06-01 16:05:48.187 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > dataLayer.push({"locale":"es-ES","region":"us","project":"overwatch","authenticated":"0","localeRegion":"eu"});
06-01 16:05:48.187 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > </script><noscript><iframe src="//www.googletagmanager.com/ns.html?id=GTM-TT34VR" height="0" width="0" style="display:none;visibility:hidden"></iframe></noscript><script>(function(w,d,s,l,i){w[l]=w[l]||[];w[l].push({'gtm.start':
06-01 16:05:48.187 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > new Date().getTime(),event:'gtm.js'});var f=d.getElementsByTagName(s)[0],
06-01 16:05:48.187 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > j=d.createElement(s),dl=l!='dataLayer'?'&l='+l:'';j.async=true;j.src=
06-01 16:05:48.187 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > '//www.googletagmanager.com/gtm.js?id='+i+dl;f.parentNode.insertBefore(j,f);
06-01 16:05:48.187 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > })(window,document,'script','dataLayer', 'GTM-TT34VR');
06-01 16:05:48.187 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > </script><script>!function(i,d,e,n){i[e]=i[e]||{},i[e][n]||(i[e][n]=function(i,e,n){if(void 0!==i){e=void 0===e?0:e,n=void 0===n?0:n;var a=d.createElement("iframe");a.width=e,a.height=n,a.hidden=!0,a.src=i,d.body.appendChild(a)}})}(window,document,"analytics","appendFrame");</script><div id="navbar" class="navbars"><div data-region="eu" data-locale="es-es" data-hash="5fa0a9ec7c8b160b81e2c9c81792d7976df4bffa" data-service-type="l" data-service-endpoint="P" data-service-version="3.3.3" data-middleware-version="3.3.1" data-ajax data-auth-url="/navbar/authenticate" data-notification-url="/navbar/notifications" data-support-url="https://eu.battle.net/support/update/json?callback=" data-current-site="games" class="Navbar is-compact is-auto is-custom-logo"><svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" viewBox="0 0 64 64" class="Navbar-embedded"><g id="Navbar-icon-new_window">
06-01 16:05:48.187 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > <path d="M21.737,39.117c3.938-6.052,8.981-10.014,19.089-10.014v7.024L53.708,24.95   L40.826,13.77v6.72C26.135,20.489,21.737,32.97,21.737,39.117L21.737,39.117z"/>
06-01 16:05:48.187 19445-19710/com.example.josel.inspiracion_manolo D/Response:: > <path d="M48.792,35.739V47.23c0,0.276-0.224,0.5-0.5,0.5h-35c-0.276,0-0.5-0.224-0.5-0.5v-26  

  

What is all the html of the page, what do I have to do to get back only the html of the page?   what would interest me is to get the gomo: persoaje name: doomfist,   etc ...