converter resposta em JSON ARRAY ou OBJECT no android voleio, php, xampp mysql - java, php, android

Estou fazendo um projeto Android, a API de login éfuncionando corretamente no carteiro, mas no formato JSON está mostrando "S" inesperado. Meu colega me disse para converter a resposta em LoginRequest.java deve ser alterada para JSONArray ou JSONObject

Aqui estão PHP, códigos JAVA para Android

    <?php

include("Connection.php");

if(isset($_POST["email"]) && isset($_POST["password"]))
{

$email=$_POST["email"];

$password=$_POST["password"];

$result = mysqli_query($conn, "select * from user_master where email="$email" && password="$password"");

if(mysqli_num_rows($result) > 0)
{
echo "Success";
exit;
}
else
{
echo "INVALID";
exit;
}
}


?>

LoginRequest.java

    package com.talentakeaways.ttpms;

import com.android.volley.AuthFailureError;
import com.android.volley.Response;
import com.android.volley.toolbox.StringRequest;

import java.util.HashMap;
import java.util.Map;

/**
* Created by chand on 15-03-2018.
*/

public class LoginRequest extends StringRequest {
private static final String url = "http://10.26.16.22:80/ttpms/login.php";
private Map<String, String> parameters;

LoginRequest(String username, String password, Response.Listener<String> listener, Response.ErrorListener errorListener) {
super(Method.POST, url, listener, errorListener);
parameters = new HashMap<>();
parameters.put("username", username);
parameters.put("password", password);
}

@Override
protected Map<String, String> getParams() throws AuthFailureError {
return parameters;
}
}

Ttpm_Login.java

    package com.talentakeaways.ttpms;

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

import com.android.volley.NetworkError;
import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.ServerError;
import com.android.volley.TimeoutError;
import com.android.volley.VolleyError;
import com.android.volley.toolbox.Volley;

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

import info.androidhive.androidsplashscreentimer.R;


public class Ttpm_Login extends AppCompatActivity {
//declaration of edit text, button and string values
EditText tenantname, passWord;
Button bt_login;
String userName, password;


protected void onCreate(Bundle savedInstanceState) {
super.onCreate(savedInstanceState);
setContentView(R.layout.activity_ttpm_login);
setTitle("Login"); //set title of the activity
initialize();
final RequestQueue requestQueue = Volley.newRequestQueue(Ttpm_Login.this);
//onClickListener method for button
bt_login.setOnClickListener(new View.OnClickListener() {
@Override
public void onClick(View v) {
//assigning String variables to the text in edit texts
userName = tenantname.getText().toString();
password = passWord.getText().toString();
//Validating the String values
if (validateUsername(userName) && validatePassword(password)) {

//Start ProgressDialog
final ProgressDialog progressDialog = new ProgressDialog(Ttpm_Login.this);
progressDialog.setTitle("Please Wait");
progressDialog.setMessage("Logging You In");
progressDialog.setCancelable(false);
progressDialog.show();

//Login Request from class LoginRequest
LoginRequest loginRequest = new LoginRequest(userName, password, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.i("Login Response", response);
progressDialog.dismiss();
try {
JSONObject jsonObject = new JSONObject(response);
//If Success then start Dashboard Activity
if (jsonObject.getBoolean("Success")) {

Intent loginSuccess = new Intent(getApplicationContext(), Ttpm_Dashboard.class);
startActivity(loginSuccess);
finish();
}

//else Invalid
else {
if (jsonObject.getString("status").equals("INVALID"))
Toast.makeText(getApplicationContext(), "User Not Found", Toast.LENGTH_SHORT).show();
else {
Toast.makeText(getApplicationContext(), "Passwords Don"t Match", Toast.LENGTH_SHORT).show();
}
}
} catch (JSONException e) {
e.printStackTrace();
Log.getStackTraceString(e);
Toast.makeText(Ttpm_Login.this, "Bad Response from the Server", Toast.LENGTH_SHORT).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
progressDialog.dismiss();
if (error instanceof ServerError) {
Toast.makeText(Ttpm_Login.this, "Server Error", Toast.LENGTH_SHORT).show();
} else if (error instanceof TimeoutError) {
Toast.makeText(Ttpm_Login.this, "Connection Timed Out", Toast.LENGTH_SHORT).show();
} else if (error instanceof NetworkError) {
Toast.makeText(Ttpm_Login.this, "Bad Network Connection", Toast.LENGTH_SHORT).show();
}
}
});
requestQueue.add(loginRequest);
}
}
});
}

private void initialize() {
tenantname = findViewById(R.id.tenantname);
passWord = findViewById(R.id.password);
bt_login = findViewById(R.id.login);
}

private boolean validateUsername(String string) {
//Validating the entered USERNAME
if (string.equals("")) {
tenantname.setError("Enter a Username");
return false;
} else if (string.length() > 50) {
tenantname.setError("Maximum 50 Characters");
return false;
} else if (string.length() < 6) {
tenantname.setError("Minimum 6 Characters");
return false;
}
tenantname.setEnabled(false);
return true;
}

private boolean validatePassword(String string) {
//Validating the entered PASSWORD
if (string.equals("")) {
passWord.setError("Enter Your Password");
return false;
} else if (string.length() > 32) {
passWord.setError("Maximum 32 Characters");
return false;
}
//        else if (string.length() < 8) {
//            passWord.setError("Minimum 8 Characters");
//            return false;
//        }
//
passWord.setEnabled(false);
return true;
}

}

E aqui está o meu logcat ao executar o login https://i.stack.imgur.com/94CGd.png

Por favor ajude. Desde já, obrigado

Respostas:

0 para resposta № 1

Por exemplo Se você visualizar a estrutura JSON, será algo como isto:

{

"resultados" : [ { "user_login": "xyz", "user_login_password": 123456 }] }

Primeiro, converta o objeto JSON no objeto JSONArray da seguinte maneira:

    JSONArray jsonarr_1 = (JSONArray) jobj.get(“results”);
for(int i=0;i<jsonarr_1.size();i++)
{
JSONObject jsonobj_1 = (JSONObject)jsonarr_1.get(i);
System.out.println(“Elements under results array”);
System.out.println(“nuser_login: ” +jsonobj_1.get(“user_login”));
System.out.println(“user_login_password: ” +jsonobj_1.get(“user_login_password”));
}

e envie o parâmetro para o servidor:

 protected Map<String, String> getParams() {

/** Pass the parameters to according to the API.*/
Map<String, String> params = new HashMap<String, String>();
params.put("user_login", edt_email.getText().toString().trim());
params.put("user_login_password", edt_password.getText().toString().trim());
return params;
}
};
/** Adding request to request queue*/
AppController.getInstance().addToRequestQueue(jsonObjReq, cancel_login_api);
}

---

0 para resposta № 2

Seus parâmetros de postagem estão incorretos. No seu back-end, você espera a chave email mas no android você está postando username, altere o nome de usuário para e-mail no aplicativo

LoginRequest(String username, String password, Response.Listener<String> listener, Response.ErrorListener errorListener) {
super(Method.POST, url, listener, errorListener);
parameters = new HashMap<>();
parameters.put("email", username);
parameters.put("password", password);
}

Como sua resposta é uma sequência, não há necessidade de convertê-la em jsonobject. Alterar bloco de resposta como este

   LoginRequest loginRequest = new LoginRequest(userName, password, new Response.Listener<String>() {
@Override
public void onResponse(String response) {
Log.i("Login Response", response);
progressDialog.dismiss();
try {
JSONObject jsonObject = new JSONObject(response);
//If Success then start Dashboard Activity
if(jsonObject.getBoolean("success")) {

Intent loginSuccess = new Intent(getApplicationContext(), Ttpm_Dashboard.class);
startActivity(loginSuccess);
finish();
}

//else Invalid
else {
if (jsonObject.getString("status").equals("INVALID"))
Toast.makeText(getApplicationContext(), "User Not Found", Toast.LENGTH_SHORT).show();
else {
Toast.makeText(getApplicationContext(), "Passwords Don"t Match", Toast.LENGTH_SHORT).show();
}
}
} catch (JSONException e) {
e.printStackTrace();
Log.getStackTraceString(e);
Toast.makeText(Ttpm_Login.this, "Bad Response from the Server", Toast.LENGTH_SHORT).show();
}
}
}, new Response.ErrorListener() {
@Override
public void onErrorResponse(VolleyError error) {
progressDialog.dismiss();
if (error instanceof ServerError) {
Toast.makeText(Ttpm_Login.this, "Server Error", Toast.LENGTH_SHORT).show();
} else if (error instanceof TimeoutError) {
Toast.makeText(Ttpm_Login.this, "Connection Timed Out", Toast.LENGTH_SHORT).show();
} else if (error instanceof NetworkError) {
Toast.makeText(Ttpm_Login.this, "Bad Network Connection", Toast.LENGTH_SHORT).show();
}
}
});
requestQueue.add(loginRequest);

---