Problem with using httpclient for fetching data

I want to use httpclient in my android app. I know this library is deprecated a long time ago but I want to use it for some reason. When I write some code to fetch JSON data from an URL the emulator fetching me this: image

this is my code :

public class FirstExampleActivity extends AppCompatActivity {

TextView tv ;
public static final String URL = "http://androidtestapp.gigfa.com/mysite/guitarist.json";

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

    tv = findViewById(R.id.tv);
}

@Override
public boolean onCreateOptionsMenu(final Menu menu) {

    MenuItem item = menu.add("GET");
    item.setShowAsAction(MenuItem.SHOW_AS_ACTION_ALWAYS);
    item.setOnMenuItemClickListener(new MenuItem.OnMenuItemClickListener() {
        @Override
        public boolean onMenuItemClick(MenuItem item) {

            Thread thread = new Thread(new Runnable() {

                Handler handler = new Handler(){

                    @Override
                    public void handleMessage(Message msg) {
                        super.handleMessage(msg);
                        String content = msg.getData().getString("content");
                        tv.setText(content);
                    }
                };

                @Override
                public void run() {
                    String content = getData();
                    Message message = new Message();
                    Bundle bundle = new Bundle();
                    bundle.putString("content",content);
                    message.setData(bundle);
                    handler.sendMessage(message);
                }
            });
            thread.start();
            return false;
        }
    });
    return super.onCreateOptionsMenu(menu);
}

private String getData() {

    HttpClient client = new DefaultHttpClient();
    HttpGet method = new HttpGet(URL);
    try{
        HttpResponse response = client.execute(method);
        InputStream stream = response.getEntity().getContent();
        String content = Utils.inputStreamToString(stream);
        return content ;
    }
    catch (Exception ex){
        ex.printStackTrace();
    }
    return null ;
}
}

I believe this answer can help you. The problem is that some sites at first return some javascript, for example for validation purposes, but httpclient doesn't support javascript.