Question

您好我正在android studio上构建一个需要注册和登录的应用程序，我的注册工作正常，而我的登录遇到麻烦，即使用户名和密码正确，我也会得到假布尔而不是真，这是我的PHP文件：

`$con = mysqli_connect("localhost", "id1013905_trhtkv", "my password",` "id1013905_user");


    $username = $_POST["username"];
    $password = $_POST["password"];

    $statement = mysqli_prepare($con, "SELECT * FROM user WHERE username = ?");
    mysqli_stmt_bind_param($statement, "s", $username);
    mysqli_stmt_execute($statement);
    mysqli_stmt_store_result($statement);
    mysqli_stmt_bind_result($statement, $colUserID, $colName, $colUsername, $colAge, $colPassword);

    $response = array();
    $response["success"] = false;  

    while(mysqli_stmt_fetch($statement)){
        if (password_verify($password, $colPassword)) {
            $response["success"] = true;  
            $response["name"] = $colName;
            $response["age"] = $colAge;
        }
    }
    echo json_encode($response);
    ?>

我的登录活动：

package com.ben.owner.say_something;

import android.app.AlertDialog;
import android.content.Intent;
import android.support.v7.app.AppCompatActivity;
import android.os.Bundle;
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 org.json.JSONException;
import org.json.JSONObject;

public class LoginActivity extends AppCompatActivity {

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

        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 v) {
                Intent registerIntent = new Intent(LoginActivity.this, RegisterActivity.class);
                LoginActivity.this.startActivity(registerIntent);
            }
        });

        bLogin.setOnClickListener(new View.OnClickListener() {
            @Override
            public void onClick(View v) {
                final String username = etUsername.getText().toString();
                final String password = etPassword.getText().toString();
                final Response.Listener<String>responseListener = 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 intent = new Intent(LoginActivity.this, UserAreaActivity.class);
                                intent.putExtra("name",name);
                                intent.putExtra("username",username);
                                intent.putExtra("age",age);
                                LoginActivity.this.startActivity(intent);

                            }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,responseListener);
                RequestQueue queue = Volley.newRequestQueue(LoginActivity.this);
                queue.add(loginRequest);

            }
        });

    }
}

我的登录请求：

package com.ben.owner.say_something;

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

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

/**
 * Created by owner on 09/03/2017.
 */
public class LoginRequest extends StringRequest {
    private static final String LOGIN_REQUEST_URL = "https://saysomething.000webhostapp.com/Login.php";
    private Map<String, String> params;

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

    }

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

Answer 1

要找到您的错误，我建议您在回复中检索服务器值。

我的意思是

而不是

$response = array();
$response["success"] = false;  

while(mysqli_stmt_fetch($statement)){
    if (password_verify($password, $colPassword)) {
        $response["success"] = true;  
        $response["name"] = $colName;
        $response["age"] = $colAge;
    }
}
echo json_encode($response);

使用

    $response = array();
    $response["success"] = false;  
echo $statement;//or something like
    while(mysqli_stmt_fetch($statement)){

        if (password_verify($password, $colPassword)) {

echo $password;
echo $colPassword;
            $response["success"] = true;  
            $response["name"] = $colName;
            $response["age"] = $colAge;
        }
    }
    echo json_encode($response);

或调试您的服务器端。看来你的服务器代码是错误的。

检查此示例

http://php.net/manual/en/mysqli-stmt.fetch.php

登录不工作androip应用程序

1 个答案: