How to send an Android post to Asp.net Core?

Question

I have an application in Asp.net Core that should receive a Post via android and I’m not getting. There is always an error on android that the page was not found.

class of the object in the Asp that will receive the Post sent by android

    public class Localizacao
{
    public string motoristaId { get; set; }
    public string lat { get; set; }
    public string lon { get; set; }
}

Asp Controller that will receive the Post

 [HttpPost]
    public JsonResult AtualizaLocalizacaoMotorista([FromBody] Localizacao localizacao)
    {
        var sa = new JsonSerializerSettings();         
        return Json(localizacao, sa);
    }

code on android to send the Post

import android.content.Context;

import android.os.Asynctask; import android.widget.Toast;

import java.io.Bufferedreader; import java.io.Ioexception; import java.io.Inputstreamreader; import java.io.Outputstreamwriter; import java.net.Httpurlconnection; import java.net.URL;

public class Trylogin extends Asynctask { private context;

@Override
protected String doInBackground(String... params) {

    final String motoristaId = params[0];
    if (null == motoristaId) {
        return "motoristaId não informado";
    }

    HttpURLConnection connection;
    OutputStreamWriter request = null;

    URL url = null;
    String response = null;
    String parameters = "motoristaId=" + motoristaId;

    try {
        url = new  URL("https://MINHA_URL");
        connection = (HttpURLConnection) url.openConnection();
        connection.setDoOutput(true);
        connection.setRequestProperty("Accept", "application/json");
        //connection.setRequestProperty("X-DreamFactory-Api-Key", "XXXXXXXXXXXXXXXXXXXX");
        //connection.setRequestProperty("X-DreamFactory-Session-Token", "key");
        //connection.setRequestProperty("Authorization", "auth");
        connection.setRequestMethod("POST");


        request = new OutputStreamWriter(connection.getOutputStream());
        request.write(parameters);
        request.flush();
        request.close();
        connection.connect();
        String line = "";
        InputStreamReader isr = new InputStreamReader(connection.getInputStream());
        BufferedReader reader = new BufferedReader(isr);
        StringBuilder sb = new StringBuilder();
        while ((line = reader.readLine()) != null) {
            sb.append(line + "\n");
        }
        // Response from server after login process will be stored in response variable.
        response = sb.toString();
        /**
         Não podemos interar com a tela!, vamos mandar para o método onPostExecute
         */
        // Toast.makeText(this,"Message from Server:"+ response, 0).show();
        isr.close();
        reader.close();
        return response;

    } catch (IOException e) {
        e.printStackTrace();
        return e.getMessage();
    }

}

/**
 * Este método irá rodar na Thread de UI após executar a ação!
 *
 * @param s
 */

@Override
protected void onPostExecute(String s) {
    super.onPostExecute(s);
    if (s != null) {
        Toast.makeText(context , s, Toast.LENGTH_SHORT).show();
    }
}

}

From Activity I call with the parameter

new TryLogin().execute("dsfsdfsdfsdfds");