php - responseLitsner 中缺少字段 - Android Studio

Question

大家好，我正在尝试使用 Volley 在 android 中实现登录\注册我使用 JSONObject 和 Repose.listener，当我在监听器之外时，一切都很好，广告显示 here

但在监听器“内部”，密码字段“丢失”，如图所示 here

登录 Activity

package com.example.ofir.bopofinal.LoginRegister;

import android.content.Intent;
import android.support.v7.app.AlertDialog;
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.TextView;

import com.android.volley.RequestQueue;
import com.android.volley.Response;
import com.android.volley.toolbox.Volley;
import com.example.ofir.bopofinal.MainActivity;
import com.example.ofir.bopofinal.R;

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

public class LoginActivity extends AppCompatActivity {

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

        final EditText etUserName = (EditText) findViewById(R.id.etUserName);
        final EditText etPassword = (EditText) findViewById(R.id.etPassword);
        final Button bLogin = (Button) findViewById(R.id.bLogin);
        final TextView registerLink = (TextView) findViewById(R.id.tvRegisterHere);

        registerLink.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                Intent regiserIntent = new Intent(LoginActivity.this,RegisterActivity.class);
                LoginActivity.this.startActivity(regiserIntent);
            }
        });

        bLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View view) {
                final String username = etUserName.getText().toString();
                final String password = etPassword.getText().toString();

                Response.Listener<String> responseLitsner = new Response.Listener<String>() {
                    @Override
                    public void onResponse(String response) {
                        try {
                            JSONObject jsonResponse = new JSONObject(response);
                            boolean success = jsonResponse.getBoolean("success");
                            if (success){
                                String name = jsonResponse.getString("name");
                                int age = jsonResponse.getInt("age");

                                Intent loginIntent = new Intent(LoginActivity.this, MainActivity.class);
                                loginIntent.putExtra("name", name);
                                loginIntent.putExtra("username", username);
                                loginIntent.putExtra("age", age);
                                LoginActivity.this.startActivity(loginIntent);

                            }
                            else{
                                AlertDialog.Builder builder = new AlertDialog.Builder(LoginActivity.this);
                                builder.setMessage("Login Failed")
                                        .setNegativeButton("Retry", null)
                                        .create()
                                        .show();
                            }
                        } catch (JSONException e) {
                            e.printStackTrace();
                        }
                    }
                };

                LoginRequest loginRequest = new LoginRequest(username,password, responseLitsner);
                RequestQueue queue = Volley.newRequestQueue(LoginActivity.this);
                queue.add(loginRequest);
            }
        });
    }
}

登录请求

package com.example.ofir.bopofinal.LoginRegister;

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

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

/**
 * Created by ofir on 11/17/2016.
 */
public class LoginRequest  extends StringRequest {


    private static final  String REGISTER_REQUEST_URL = "http://cellularguide.info/cellularguide.info/offir/Login.php";
    private Map<String,String> params;

    public LoginRequest(String username ,String password, Response.Listener<String> listener){
        super(Method.POST,REGISTER_REQUEST_URL,listener,null);
        params = new HashMap<>();
        params.put("username", username);
        params.put("password", password);

    }
    @Override
    public Map<String, String> getParams() {
        return params;
    }
}

登录.PHP

<?php
   $con = mysqli_connect(....); // the con is working - dont worry
    
    $username = $_POST["username"];
    $password = $_POST["password"];
    
    $statement = mysqli_prepare($con, "SELECT username,password FROM user WHERE username = ? AND password = ?");
    mysqli_stmt_bind_param($statement, "ss", $username, $password);
    mysqli_stmt_execute($statement);
    
    mysqli_stmt_store_result($statement);
    mysqli_stmt_bind_result($statement,  $username, $password);
    
    $response = array();
    $response["success"] = false;  
    
    while(mysqli_stmt_fetch($statement)){
        $response["success"] = true;  
        $response["name"] = $name;
        $response["age"] = $age;
        $response["username"] = $username;
        $response["password"] = $password;
    }
    
    echo json_encode($response);
?>

此原因响应:{"success":false} 始终

附注寄存器的工作方式相同(或多或少)并且工作正常

Answer 1

我看到您在调用登录之前调用了响应。它从哪里来？您似乎在 bLogin.setOnClickListener 中发送请求 (LoginRequest) 之前调用了响应 (Response.Listener)。请尝试扭转它们。