My app does not return JSON data

Question

I’m making an app and in a part of it the user can update the login data, just enter the screen that the data is loaded and filled, automatically. The problem is that in fact this is not happening! The data is not coming! I have already tested via url and the data appear on the web, but in the app not! Therefore?

Just follow my code:

package com.example.gustavo.domanda;

import android.os.Bundle;
import android.preference.PreferenceActivity;
import android.support.v7.app.AppCompatActivity;
import android.support.v7.widget.Toolbar;
import android.util.Log;

import android.widget.EditText;
import android.widget.TextView;
import android.widget.Toast;

import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.Volley;
import com.loopj.android.http.AsyncHttpClient;
import com.loopj.android.http.RequestParams;
import com.loopj.android.http.TextHttpResponseHandler;

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

import java.util.ArrayList;

import cz.msebera.android.httpclient.Header;

public class AtualizarDadosLoginActivity extends AppCompatActivity {

private int idusuario;
private EditText nome;
private EditText sobrenome;
private EditText email;

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);
    setContentView(R.layout.activity_atualizar_dados);
    Toolbar toolbar = (Toolbar) findViewById(R.id.toolbar);
    setSupportActionBar(toolbar);

    Bundle extra = getIntent().getExtras();

    if(extra != null){
       idusuario = extra.getInt("idusuario");
    }
    Toast.makeText(this, "id usuario "+idusuario, Toast.LENGTH_SHORT).show();

    getDados(idusuario);

}

private void getDados(int idusuario) {

    int opcao = 1; //mostrar dados usuário
    RequestParams rp = new RequestParams();

    AsyncHttpClient client = new AsyncHttpClient();
    client.get("http://www.reservacomdomanda.com/areaAdmin/api/admin_estabelecimento/reqDataCliJson.php?opcao="+opcao+"&idusuario="+idusuario, rp, new TextHttpResponseHandler() {
        @Override
        public void onFailure(int statusCode, Header[] headers, String responseString, Throwable throwable) {
            Toast.makeText(getBaseContext(), "Problema na conexao!"+statusCode, Toast.LENGTH_LONG).show();
        }

        @Override
        public void onSuccess(int statusCode, Header[] headers, String responseString) {
            try {
                JSONObject obj = new JSONObject(responseString);
                String retorno = "";
                Toast.makeText(AtualizarDadosLoginActivity.this, "response: "+responseString, Toast.LENGTH_SHORT).show();

                if (!obj.has("erro")) {
                    retorno += "\n" + obj.getString("idusuario");
                    retorno += "\n" + obj.getString("nome");
                    retorno += "\n" + obj.getString("sobrenome");
                    retorno += "\n" + obj.getString("email");
                    Toast.makeText(getBaseContext(),"Dados retornados: "+retorno, Toast.LENGTH_LONG).show();

                    EditText nome = (EditText) findViewById(R.id.edtNome);
                    EditText sobrenome = (EditText) findViewById(R.id.edtSobrenome);
                    EditText email = (EditText) findViewById(R.id.edtEmail);

                    nome.setText(obj.optString("nome").toString(), TextView.BufferType.EDITABLE);
                    sobrenome.setText(obj.optString("sobrenome"), TextView.BufferType.EDITABLE);
                    email.setText(obj.optString("email"), TextView.BufferType.EDITABLE);
                }

            } catch (JSONException e){

            }
        }

    });
}

}

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.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:layout_width="match_parent"
android:layout_height="match_parent"
app:layout_behavior="@string/appbar_scrolling_view_behavior"
tools:context="com.example.gustavo.domanda.AtualizarDadosLoginActivity"
tools:showIn="@layout/activity_atualizar_dados">

<EditText
    android:id="@+id/edtNome"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="8dp"
    android:layout_marginRight="8dp"
    android:layout_marginTop="41dp"
    android:ems="10"
    android:hint="nome"
    android:inputType="textPersonName"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toTopOf="parent"
    app:layout_constraintHorizontal_bias="0.503" />

<EditText
    android:id="@+id/edtSobrenome"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="8dp"
    android:layout_marginRight="8dp"
    android:layout_marginTop="8dp"
    android:ems="10"
    android:hint="sobrenome"
    android:inputType="textPersonName"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/edtNome" />

<EditText
    android:id="@+id/edtEmail"
    android:layout_width="wrap_content"
    android:layout_height="wrap_content"
    android:layout_marginLeft="8dp"
    android:layout_marginRight="8dp"
    android:layout_marginTop="8dp"
    android:ems="10"
    android:hint="e-mail"
    android:inputType="textPersonName"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/edtSobrenome" />

<Button
    android:id="@+id/btnAtualizar"
    android:layout_width="210dp"
    android:layout_height="wrap_content"
    android:layout_marginLeft="8dp"
    android:layout_marginRight="8dp"
    android:layout_marginTop="8dp"
    android:background="@drawable/borda_botao"
    android:text="Atualizar"
    app:layout_constraintLeft_toLeftOf="parent"
    app:layout_constraintRight_toRightOf="parent"
    app:layout_constraintTop_toBottomOf="@+id/edtEmail" />

If you run this url http://www.reservacomdomanda.com/areaAdmin/api/admin_estabelecimento/reqDataCliJson.php?opcao=1&idusuario=5 in the browser, you will see that there are data to be returned.

Answer 1

You are trying to parse an array using an JSONObject, causing him to fall into his catch.

Try to do something like this, appropriate to your situation:

JSONArray jsonarray = new JSONArray(responseString);
for (int i = 0; i < jsonarray.length(); i++) {
  JSONObject jsonobject = jsonarray.getJSONObject(i);
  String name = jsonobject.getString("name");
  String url = jsonobject.getString("url");
}